NKA / Niska Gas Storage Partners LLC - SEC-arkiveringer, Årsrapport, Fullmaktsdokument

Niska Gas Storage Partners LLC
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SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to Niska Gas Storage Partners LLC
SEC Filings (Chronological Order)
På denne siden finner du en fullstendig, kronologisk liste over SEC-arkiveringer, med unntak av eierskaps-arkiveringer som vi leverer andre steder.
August 9, 2016 15-12B

Niska Gas Storage Partners 15-12B

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 15 CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13 AND 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934. Commission File Number 001- 34733 NISKA GAS STORAGE PARTNERS LLC (Exact name of registrant as speci

August 9, 2016 15-12B

Niska Gas Storage Partners 15-12B

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 15 CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13 AND 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934. Commission File Number 001- 34733 NISKA GAS STORAGE PARTNERS LLC (Exact name of registrant as speci

August 5, 2016 POS AM

Niska Gas Storage Partners POS AM

As filed with the Securities and Exchange Commission on August 5, 2016 Registration No.

August 5, 2016 POS AM

Niska Gas Storage Partners POS AM

As filed with the Securities and Exchange Commission on August 5, 2016 Registration No.

August 5, 2016 S-8 POS

Niska Gas Storage Partners S-8 POS

S-8 POS 1 a16-162531s8pos.htm S-8 POS As filed with the Securities and Exchange Commission on August 5, 2016 Registration No. 333- 177936 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8 REGISTRATION STATEMENT NO. 333-177936 UNDER THE SECURITIES ACT OF 1933 NISKA GAS STORAGE PARTNERS LLC (Exact name of registrant as specified in its

August 5, 2016 POS AM

Niska Gas Storage Partners S-3

As filed with the Securities and Exchange Commission on August 5, 2016 Registration No.

July 19, 2016 EX-99.25

EX-99.25

NOTIFICATION OF THE REMOVAL FROM LISTING AND REGISTRATION OF THE STATED SECURITIES The New York Stock Exchange hereby notifies the SEC of its intention to remove the entire class of the stated securities from listing and registration on the Exchange at the opening of business on August 1, 2016, pursuant to the provisions of Rule 12d2-2 (a).

June 10, 2016 EX-99.1

NISKA GAS STORAGE PARTNERS LLC CONSOLIDATED STATEMENTS OF EARNINGS (LOSS) AND COMPREHENSIVE INCOME (LOSS) (in thousands of U.S. dollars, except per share amounts)

Exhibit 99.1 Niska Gas Storage Partners LLC Announces Fourth Quarter and Annual Financial Results for Fiscal 2016 RADNOR, PENNSYLVANIA ? June 10, 2016 - Niska Gas Storage Partners LLC (NYSE:NKA) (?Niska? or ?the Company?) reported today its financial results for the fiscal year and quarter ended March 31, 2016. Financial Results Niska?s net loss for the year ended March 31, 2016 was $103.3 million

June 10, 2016 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K 1 a16-1318518k.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 10, 2016 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation o

June 10, 2016 10-K

Niska Gas Storage Partners LLC 10-K (Annual Report)

10-K 1 a2228789z10-k.htm 10-K Use these links to rapidly review the document TABLE OF CONTENTS TABLE OF CONTENTS 2 Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 Form 10-K ý Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended March 31, 2016 OR o Transition Report Pursuant to Section 13 or 15(d) of

June 10, 2016 EX-21.1

LIST OF SUBSIDIARIES OF NISKA GAS STORAGE PARTNERS LLC

QuickLinks - Click here to rapidly navigate through this document Exhibit 21.1 LIST OF SUBSIDIARIES OF NISKA GAS STORAGE PARTNERS LLC Entity Jurisdiction of Organization Access Gas Services (Ontario) Inc. Ontario Access Gas Services Inc. British Columbia AECO Gas Storage Partnership Alberta Coastal Bend Gas Storage, LLC Delaware EnerStream Agency Services Inc. Ontario Niska Canada GP ULC Alberta N

June 10, 2016 EX-12.1

Statements Regarding Computation Ratios of Earnings (Loss) to Fixed Charges

QuickLinks - Click here to rapidly navigate through this document Exhibit 12.1 Statements Regarding Computation Ratios of Earnings (Loss) to Fixed Charges Year Ended March 31, 2016 2015 2014 2013 2012 Earnings: Net earnings (loss) before income taxes $ (115,105 ) $ (382,312 ) $ (19,213 ) $ (62,543 ) $ (185,459 ) Less: capitalized interest — — — (2,928 ) (4,077 ) Total earnings (loss) (115,105 ) (3

March 1, 2016 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 29, 2016 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 001-347

March 1, 2016 EX-10.1

AMENDMENT NO. 1 TO AMENDED & RESTATED CREDIT AGREEMENT dated as of February 29, 2016 NISKA GAS STORAGE US, LLC, as US Borrower, AECO GAS STORAGE PARTNERSHIP, as Canadian Borrower, NISKA GAS STORAGE PARTNERS LLC, as Holdings, EACH OTHER LOAN PARTY PAR

EX-10.1 2 a16-55551ex10d1.htm EX-10.1 Exhibit 10.1 EXECUTION VERSION AMENDMENT NO. 1 TO AMENDED & RESTATED CREDIT AGREEMENT dated as of February 29, 2016 among NISKA GAS STORAGE US, LLC, as US Borrower, AECO GAS STORAGE PARTNERSHIP, as Canadian Borrower, NISKA GAS STORAGE PARTNERS LLC, as Holdings, EACH OTHER LOAN PARTY PARTY HERETO, ROYAL BANK OF CANADA, as Administrative Agent, and THE LENDERS P

February 9, 2016 10-Q

NKA / Niska Gas Storage Partners LLC 10-Q - Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q x Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended December 31, 2015 OR o Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number: 001-34733

February 4, 2016 EX-99.1

NISKA GAS STORAGE PARTNERS LLC CONSOLIDATED STATEMENTS OF EARNINGS (LOSS) AND COMPREHENSIVE INCOME (LOSS) (in thousands of U.S. dollars, except for per unit amounts)

EX-99.1 2 a16-35461ex99d1.htm EX-99.1 Exhibit 99.1 Niska Gas Storage Partners LLC Announces Third Quarter Results for Fiscal 2016 RADNOR, PENNSYLVANIA — February 4, 2016 - Niska Gas Storage Partners LLC (NYSE:NKA) (“Niska” or “the Company”) reported today its financial results for the quarter and nine months ended December 31, 2015. Financial Results Niska’s Adjusted EBITDA (as defined below) for

February 4, 2016 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 4, 2016 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 001-3473

January 4, 2016 DEFM14C

Niska Gas Storage Partners DEFM14C

Use these links to rapidly review the document TABLE OF CONTENTS TABLE OF CONTENTS TABLE OF CONTENTS INDEX TO FINANCIAL STATEMENTS TABLE OF CONTENTS Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

November 20, 2015 PREM14C

Niska Gas Storage Partners PREM14C

Use these links to rapidly review the document TABLE OF CONTENTS TABLE OF CONTENTS TABLE OF CONTENTS INDEX TO FINANCIAL STATEMENTS TABLE OF CONTENTS Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

November 6, 2015 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q x Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended September 30, 2015 OR o Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number: 001-3473

November 5, 2015 EX-99.1

NISKA GAS STORAGE PARTNERS LLC CONSOLIDATED STATEMENTS OF EARNINGS (LOSS) AND COMPREHENSIVE INCOME (LOSS) (in thousands of U.S. dollars, except for per unit amounts)

EX-99.1 2 a15-223991ex99d1.htm EX-99.1 Exhibit 99.1 Niska Gas Storage Partners LLC Announces Second Quarter Results for Fiscal 2016 RADNOR, PENNSYLVANIA — November 5, 2015 - Niska Gas Storage Partners LLC (NYSE:NKA) (“Niska” or “the Company”) reported today its financial results for the quarter and six months ended September 30, 2015. Financial Results Niska’s Adjusted EBITDA (as defined below) fo

November 5, 2015 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): November 5, 2015 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 001-3473

August 7, 2015 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q x Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended June 30, 2015 OR o Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number: 001-34733 Nis

August 6, 2015 EX-99.1

NISKA GAS STORAGE PARTNERS LLC CONSOLIDATED STATEMENTS OF EARNINGS (LOSS) AND COMPREHENSIVE INCOME (LOSS) (in thousands of U.S. dollars, except for per unit amounts)

Exhibit 99.1 Niska Gas Storage Partners LLC Announces First Quarter Results for Fiscal 2016 and Provides an Update on the Merger Transaction with Brookfield Infrastructure RADNOR, PENNSYLVANIA ? August 6, 2015 - Niska Gas Storage Partners LLC (NYSE:NKA) (?Niska? or ?the Company?) reported today its financial results for the three months ended June 30, 2015 and provided an update on its recently an

August 6, 2015 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K 1 a15-1690028k.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 6, 2015 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware 001-34733 27-1855740 (State or other jurisdict

August 4, 2015 EX-10.2

AGREEMENT REGARDING NISKA GAS STORAGE PARTNERS LLC PHANTOM UNIT PERFORMANCE PLAN AWARDS

Exhibit 10.2 EXECUTION VERSION AGREEMENT REGARDING NISKA GAS STORAGE PARTNERS LLC PHANTOM UNIT PERFORMANCE PLAN AWARDS This Agreement Regarding Niska Gas Storage Partners LLC Phantom Unit Performance Plan Awards (the ?Agreement?) is entered into between Bruce D. Davis, Jr. (?Employee?) and Niska Gas Storage Partners LLC, a Delaware limited liability company (the ?Company?), as of July 31, 2015 (th

August 4, 2015 EX-10.1

SEPARATION AGREEMENT AND GENERAL RELEASE OF CLAIMS

Exhibit 10.1 EXECUTION VERSION SEPARATION AGREEMENT AND GENERAL RELEASE OF CLAIMS This Separation Agreement and Release of Claims (the ?Separation Agreement?) is entered into between Bruce D. Davis, Jr. (?Employee?), Niska Gas Storage Partners LLC, a Delaware limited liability company (the ?Company?), and Niska Gas Transport Inc., a Delaware corporation and an indirect wholly-owned subsidiary of t

August 4, 2015 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 31, 2015 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 001-34733 (

July 31, 2015 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 28, 2015 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 001-34733 (

July 31, 2015 EX-10.1

CREDIT AGREEMENT Dated as of July 28, 2015 by and between NISKA GAS STORAGE PARTNERS LLC, as the Borrower, SWAN FINANCE LP, as Administrative Agent and Collateral Agent, The Lenders Party Hereto

EX-10.1 2 a15-167081ex10d1.htm EX-10.1 Exhibit 10.1 CREDIT AGREEMENT Dated as of July 28, 2015 by and between NISKA GAS STORAGE PARTNERS LLC, as the Borrower, SWAN FINANCE LP, as Administrative Agent and Collateral Agent, and The Lenders Party Hereto TABLE OF CONTENTS Page ARTICLE I. DEFINITIONS AND ACCOUNTING TERMS 1 1.01 Defined Terms 1 1.02 Other Interpretive Provisions 17 1.03 Accounting Terms

June 18, 2015 EX-10.1

Execution Version

Exhibit 10.1 Execution Version June 14, 2015 Niska Gas Storage Partners LLC 400, 607-8th Avenue SW Calgary, AB. Canada Attention: General Counsel Re: Commitment Letter Ladies and Gentlemen: You (the ?Borrower?) have requested that BIF II Swan Finance Co. (Delaware) LLC (the ?Lender?) commit to provide a senior multiple draw term loan credit facility in an aggregate amount of $50,000,000 (the ?Faci

June 18, 2015 8-K

Changes in Control of Registrant, Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Other Events, Submission of Matters to a Vote of Security Holders

QuickLinks - Click here to rapidly navigate through this document UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

June 18, 2015 EX-2.1

AGREEMENT AND PLAN OF MERGER AND MEMBERSHIP INTEREST TRANSFER AGREEMENT BY AND AMONG NISKA GAS STORAGE PARTNERS LLC, NISKA GAS STORAGE MANAGEMENT LLC, NISKA SPONSOR HOLDINGS COÖPERATIEF U.A., SWAN HOLDINGS LP AND SWAN MERGER SUB LLC DATED AS OF JUNE

QuickLinks - Click here to rapidly navigate through this document Exhibit 2.1 EXECUTION VERSION AGREEMENT AND PLAN OF MERGER AND MEMBERSHIP INTEREST TRANSFER AGREEMENT BY AND AMONG NISKA GAS STORAGE PARTNERS LLC, NISKA GAS STORAGE MANAGEMENT LLC, NISKA SPONSOR HOLDINGS CO?PERATIEF U.A., SWAN HOLDINGS LP AND SWAN MERGER SUB LLC DATED AS OF JUNE 14, 2015 TABLE OF CONTENTS Page ARTICLE I DEFINITIONS

June 12, 2015 EX-12.1

Statements Regarding Computation Ratios of Earnings to Fixed Charges

QuickLinks - Click here to rapidly navigate through this document Exhibit 12.1 Statements Regarding Computation Ratios of Earnings to Fixed Charges Year Ended March 31, 2015 2014 2013 2012 2011 Earnings: Net earnings (loss) before income taxes $ (382,312 ) $ (19,213 ) $ (62,543 ) $ (185,459 ) $ 27,403 Less: capitalized interest — — (2,928 ) (4,077 ) (2,018 ) Total earnings (loss) (382,312 ) (19,21

June 12, 2015 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 Form 10-K

Use these links to rapidly review the document TABLE OF CONTENTS INDEX TO FINANCIAL STATEMENTS Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.

June 12, 2015 EX-99.1

NISKA GAS STORAGE PARTNERS LLC CONSOLIDATED STATEMENTS OF EARNINGS (LOSS) AND COMPREHENSIVE INCOME (LOSS) (in thousands of U.S. dollars, except for per unit amounts)

Exhibit 99.1 Niska Gas Storage Partners LLC Announces Filing of Form 10-K for the Year Ended March 31, 2015 and Fourth Quarter and Annual Financial Results for Fiscal 2015 RADNOR, PENNSYLVANIA ? June 12, 2015 - Niska Gas Storage Partners LLC (NYSE:NKA) (?Niska? or ?the Company?) announced today that it has filed its Annual Report on Form 10-K for the year ended March 31, 2015 with the United State

June 12, 2015 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 12, 2015 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 001-34733 (

June 12, 2015 EX-21.1

LIST OF SUBSIDIARIES OF NISKA GAS STORAGE PARTNERS LLC

Exhibit 21.1 LIST OF SUBSIDIARIES OF NISKA GAS STORAGE PARTNERS LLC Entity Jurisdiction of Organization Access Gas Services (Ontario) Inc. Ontario Access Gas Services Inc. British Columbia AECO Gas Storage Partnership Alberta Coastal Bend Gas Storage, LLC Delaware EnerStream Agency Services Inc. Ontario Niska Canada GP ULC Alberta Niska Gas Storage Canada Finance Corp. Alberta Niska Gas Storage Ca

June 8, 2015 SC 13D/A

NKA / Niska Gas Storage Partners LLC / Niska Sponsor Holdings Cooperatief U.A. - SC 13D/A Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D (Amendment No. 2) Under the Securities Exchange Act of 1934 Niska Gas Storage Partners LLC (Name of Issuer) Common Units, No Par Value (Title of Class of Securities) 654678 10 1 (CUSIP Number) Dianna Rosser Aprile c/o Riverstone Holdings LLC 712 Fifth Avenue, 36th Floor New York, NY 10019 (212) 993-0076 (Name, Add

June 5, 2015 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 5, 2015 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 001-34733 (C

June 5, 2015 EX-10.1

EMPLOYMENT AGREEMENT

Exhibit 10.1 EMPLOYMENT AGREEMENT This Employment Agreement (?Agreement?) is made and entered into by and between Niska Gas Storage Partners LLC, a Delaware limited liability company (the ?Company?) and Vance E. Powers (?Employee?) effective as of June 5, 2015 (the ?Effective Date?). 1. Employment. During the Employment Period (as defined in Section 4), the Company shall employ Employee, and Emplo

February 3, 2015 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q x Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended December 31, 2014 OR o Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number: 001-34733

February 2, 2015 EX-99.1

NISKA GAS STORAGE PARTNERS LLC CONSOLIDATED STATEMENTS OF EARNINGS (LOSS) AND COMPREHENSIVE INCOME (LOSS) (in thousands of U.S. dollars, except for per unit amounts)

Exhibit 99.1 Niska Gas Storage Partners LLC Announces Suspension of Common Unit Distribution and Third Quarter Results for Fiscal 2015 RADNOR, PENNSYLVANIA — February 2, 2015 - Niska Gas Storage Partners LLC (NYSE:NKA) (“Niska” or “the Company”) reported today its financial results for the quarter and nine months ended December 31, 2014. The Company also provided an update on the current business

February 2, 2015 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 2, 2015 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 001-3473

January 23, 2015 CORRESP

NKA / Niska Gas Storage Partners LLC CORRESP - -

NISKA GAS STORAGE PARTNERS LLC 170 Radnor Chester Road, Suite 150 Radnor, PA 19087 Via EDGAR January 23, 2015 Attention: Mara Ransom U.

January 9, 2015 S-3/A

NKA / Niska Gas Storage Partners LLC S-3/A - - S-3/A

Use these links to rapidly review the document TABLE OF CONTENTS Table of Contents As filed with the Securities and Exchange Commission on January 9, 2015 Registration No.

January 9, 2015 CORRESP

NKA / Niska Gas Storage Partners LLC CORRESP - -

E. Ramey Layne [email protected] Tel +1.713.758.4629 Fax +1.713.751.5396 Via EDGAR January 9, 2015 Mara L. Ransom Assistant Director United States Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.E. Washington, D.C. 20549-3561 Re: Niska Gas Storage Partners LLC Amendment No. 1 to Registration Statement on Form S-3 Filed December 19, 2014 File No. 333-200004 Ladies

January 7, 2015 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 31, 2014 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 001-347

December 31, 2014 SC 13D/A

NKA / Niska Gas Storage Partners LLC / Niska Sponsor Holdings Cooperatief U.A. - SC 13D/A Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D (Amendment No. 1) Under the Securities Exchange Act of 1934 Niska Gas Storage Partners LLC (Name of Issuer) Common Units, No Par Value (Title of Class of Securities) 654678 10 1 (CUSIP Number) Dianna Rosser Aprile c/o Riverstone Holdings LLC 712 Fifth Avenue, 36th Floor New York, NY 10019 (212) 993-0076 (Name, Add

December 19, 2014 EX-5.3

Niska Gas Storage Partners LLC et al. Registration on Form S-3 with the US Securities and Exchange Commission of Common Units Representing Limited Liability Company Interests, Debt Securities, Guarantees, Units

Exhibit 5.3 Niska Partners Coöperatief U.A. (the “Cooperative”) Prins Bernhardplein 200 1097 JB Amsterdam The Netherlands Date December 19, 2014 Pierre Nijnens E [email protected] Our ref. M22307626/1/92006345/pjamn T +1 212 259 4102 F +1 212 259 4111 Dear Sir/Madam, Niska Gas Storage Partners LLC et al. Registration on Form S-3 with the US Securities and Exchange Commission of Common Uni

December 19, 2014 CORRESP

NKA / Niska Gas Storage Partners LLC CORRESP - -

E. Ramey Layne [email protected] Tel +1.713.758.4629 Fax +1.713.751.5396 Via EDGAR December 19, 2014 Mara L. Ransom Assistant Director United States Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.E. Washington, D.C. 20549-3561 Re: Niska Gas Storage Partners LLC Registration Statement on Form S-3 Filed November 7, 2014 File No. 333-200004 Ladies and Gentlemen: On

December 19, 2014 S-3/A

NKA / Niska Gas Storage Partners LLC S-3/A - - S-3/A

QuickLinks - Click here to rapidly navigate through this document As filed with the Securities and Exchange Commission on December 19, 2014 Registration No.

December 3, 2014 424B3

Niska Gas Storage Canada ULC Niska Gas Storage Canada Finance Corp. Offer to Exchange up to $575,000,000 of 6.50% Senior Notes due 2019 that have been registered under the Securities Act of 1933 for $575,000,000 of 6.50% Senior Notes due 2019 that ha

Use these links to rapidly review the document TABLE OF CONTENTS Table of Contents Filed Pursuant to Rule 424(b)(3) Registration No.

November 26, 2014 S-4/A

NKA / Niska Gas Storage Partners LLC S-4/A - - S-4/A

QuickLinks - Click here to rapidly navigate through this document As filed with the Securities and Exchange Commission on November 26, 2014 Registration No.

November 14, 2014 EX-12.1

STATEMENT OF COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

Exhibit 12.1 STATEMENT OF COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES Niska Predecessor Niska Year Ended March 31, Six Months Ended September 30, 2010 2011 (1) 2012 2013 2014 2014 Earnings: Net earnings (loss) before income taxes $ 121,149 $ 27,403 $ (185,459 ) $ (62,543 ) $ (19,213 ) $ (64,043 ) Less: capitalized interest (574 ) (2,018 ) (4,077 ) (2,928 ) — — Total earnings (loss) 120,575 2

November 14, 2014 S-4

NKA / Niska Gas Storage Partners LLC S-4 - - S-4

Use these links to rapidly review the document TABLE OF CONTENTS Table of Contents As filed with the Securities and Exchange Commission on November 14, 2014 Registration No.

November 14, 2014 EX-21.1

LIST OF SUBSIDIARIES OF NISKA GAS STORAGE PARTNERS LLC

Exhibit 21.1 LIST OF SUBSIDIARIES OF NISKA GAS STORAGE PARTNERS LLC Entity Jurisdiction of Organization Access Gas Services (Ontario) Inc. Ontario Access Gas Services Inc. British Columbia AECO Gas Storage Partnership Delaware Alberta Coastal Bend Gas Storage, LLC Delaware EnerStream Agency Services Inc. Ontario Niska Canada GP ULC Alberta Niska Gas Storage Canada Finance Corp. Alberta Niska Gas S

November 14, 2014 EX-5.3

Registration on Form S-4 with the US Securities and Exchange Commission of $575,000,000 aggregate principal amount of 6.50% Senior Notes due 2019 by Niska Gas Storage Canada ULC and Niska Gas Storage Canada Finance Corp.

Exhibit 5.3 Niska Partners Coöperatief U.A. (the “Cooperative”) Prins Bernhardplein 200 1097 JB Amsterdam The Netherlands November 14, 2014 Pierre Nijnens E [email protected] Our ref. M22015981/1/92006345/pjamn T +1 212 259 4102 F +1 212 259 4111 Re: Dear Sir/Madam, Registration on Form S-4 with the US Securities and Exchange Commission of $575,000,000 aggregate principal amount of 6.50%

November 14, 2014 EX-25.1

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE CHECK IF AN APPLICATION TO DETERMINE ELIGIBILITY OF A TRUSTE

EX-25.1 7 a2222226zex-251.htm EX-25.1 Exhibit 25.1 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE CHECK IF AN APPLICATION TO DETERMINE ELIGIBILITY OF A TRUSTEE PURSUANT TO SECTION 305(b)(2) o THE BANK OF NEW YORK MELLON (Exact name of trustee as specified i

November 7, 2014 EX-3.42

CORPORATE ACCESS NUMBER: 2017996634 BUSINESS CORPORATIONS ACT NISKA GAS STORAGE CANADA ULC IS THE RESULT OF AN AMALGAMATION FILED ON 2014/02/01.

Exhibit 3.42 CORPORATE ACCESS NUMBER: 2017996634 BUSINESS CORPORATIONS ACT CERTIFICATE OF AMALGAMATION NISKA GAS STORAGE CANADA ULC IS THE RESULT OF AN AMALGAMATION FILED ON 2014/02/01. BUSINESS CORPORATIONS ACT Alberta Articles of Amalgamation 1. Name of Amalgamated Corporation NISKA GAS STORAGE CANADA ULC 2. The classes of shares, and any maximum number of shares that the corporation is authoriz

November 7, 2014 EX-3.50

NISKA CANADA GP ULC BY-LAW NO. 1

Exhibit 3.50 NISKA CANADA GP ULC BY-LAW NO. 1 INDEX Page DEFINITIONS 5 REGISTERED OFFICE 5 SEAL 6 DIRECTORS 6 Number 6 Vacancies 6 Powers 6 Duties 6 Qualification 6 Term of Office 7 Election 7 Consent to Election 7 Removal 7 Vacation of Office 8 Validity of Acts 8 MEETINGS OF DIRECTORS 8 Place of Meeting 8 Notice 8 Waiver of Notice 8 Omission of Notice 9 Telephone Participation 9 Adjournment 9 Quo

November 7, 2014 EX-3.53

CERTIFICATE OF FORMATION NISKA MIDSTREAM LLC

Exhibit 3.53 CERTIFICATE OF FORMATION OF NISKA MIDSTREAM LLC This Certificate of Formation of Niska Midstream LLC (the “Company”), dated July 11, 2014, has been duly executed, and is filed pursuant to Section 18—201 of the Delaware Limited Liability Company Act (the “Act”) to form a limited liability company under the Act. 1. Name. The name of the Company is Niska Midstream LLC. 2. Registered Offi

November 7, 2014 EX-4.1

[Form of Senior Indenture] [NISKA GAS STORAGE PARTNERS LLC] [NISKA GAS STORAGE US, LLC] [NISKA GAS STORAGE US FINANCE CORP.] [NISKA GAS STORAGE CANADA ULC] [NISKA GAS STORAGE CANADA FINANCE CORP.] Subsidiary Guarantors party hereto, [ ], as Trustee D

EX-4.1 12 a2222118zex-41.htm EX-4.1 Exhibit 4.1 [Form of Senior Indenture] [NISKA GAS STORAGE PARTNERS LLC] [NISKA GAS STORAGE US, LLC] [NISKA GAS STORAGE US FINANCE CORP.] [NISKA GAS STORAGE CANADA ULC] [NISKA GAS STORAGE CANADA FINANCE CORP.] Subsidiary Guarantors party hereto, and [ ], as Trustee INDENTURE Dated as of Debt Securities CROSS-REFERENCE TABLE TIA Section Indenture Section 310 (a) 7

November 7, 2014 EX-3.43

NISKA GAS STORAGE CANADA ULC BY-LAW NO. 1

Exhibit 3.43 NISKA GAS STORAGE CANADA ULC BY-LAW NO. 1 INDEX Page DEFINITIONS 5 REGISTERED OFFICE 5 SEAL 6 DIRECTORS 6 Number 6 Vacancies 6 Powers 6 Duties 6 Qualification 6 Term of Office 7 Election 7 Consent to Election 7 Removal 7 Vacation of Office 8 Validity of Acts 8 MEETINGS OF DIRECTORS 8 Place of Meeting 8 Notice 8 Waiver of Notice 8 Omission of Notice 9 Telephone Participation 9 Adjournm

November 7, 2014 EX-3.51

State of Delaware

Exhibit 3.51 State of Delaware 05/23/03 FRI 16:50 FAX 5045817569 SPWWH Secretary of State 003 Division of Corporations Delivered 06:03 PM 05/23/2003 FILED 06:03 PM 05/23/2003 SRV 030341069 – 3662310 FILE CERTIFICATE OF FORMATION OF STARKS GAS STORAGE L.L.C. First: The name of the limited liability company is Starks Gas Storage L.L.C.. Second: The address of its registered office in the State of De

November 7, 2014 EX-4.2

[Form of Subordinated Indenture] [NISKA GAS STORAGE PARTNERS LLC] [NISKA GAS STORAGE US, LLC] [NISKA GAS STORAGE US FINANCE CORP.] [NISKA GAS STORAGE CANADA ULC] [NISKA GAS STORAGE CANADA FINANCE CORP.] Subsidiary Guarantors party hereto, [ ], as Tru

EX-4.2 13 a2222118zex-42.htm EX-4.2 Exhibit 4.2 [Form of Subordinated Indenture] [NISKA GAS STORAGE PARTNERS LLC] [NISKA GAS STORAGE US, LLC] [NISKA GAS STORAGE US FINANCE CORP.] [NISKA GAS STORAGE CANADA ULC] [NISKA GAS STORAGE CANADA FINANCE CORP.] Subsidiary Guarantors party hereto, and [ ], as Trustee INDENTURE Dated as of Debt Securities CROSS-REFERENCE TABLE TIA Section Indenture Section 310

November 7, 2014 EX-3.54

LIMITED LIABILITY COMPANY AGREEMENT NISKA MIDSTREAM LLC

Exhibit 3.54 LIMITED LIABILITY COMPANY AGREEMENT OF NISKA MIDSTREAM LLC This LIMITED LIABILITY COMPANY AGREEMENT OF NISKA MIDSTREAM LLC (this “Agreement”), effective as of July 11, 2014, is adopted, executed and agreed to by the Sole Member (as defined below). 1. Formation. Niska Midstream LLC (the “Company”) has been formed as a Delaware limited liability company pursuant to the Delaware Limited

November 7, 2014 EX-3.48

LIMITED LIABILITY COMPANY AGREEMENT COASTAL BEND GAS STORAGE, LLC

EX-3.48 5 a2222118zex-348.htm EX-3.48 Exhibit 3.48 LIMITED LIABILITY COMPANY AGREEMENT OF COASTAL BEND GAS STORAGE, LLC This Limited Liability Company Agreement (“Agreement”) of Coastal Bend Gas Storage, LLC (the “Company”), dated as of May 4, 2006, is made between (a) the Company and (b) Niska Gas Storage LLC, the Company’s sole member. The undersigned enter into this limited liability company ag

November 7, 2014 S-3

NKA / Niska Gas Storage Partners LLC S-3 - - S-3

Use these links to rapidly review the document TABLE OF CONTENTS Table of Contents As filed with the Securities and Exchange Commission on November 7, 2014 Registration No.

November 7, 2014 EX-3.52

LIMITED LIABILITY COMPANY AGREEMENT STARKS GAS STORAGE L.L.C.

Exhibit 3.52 LIMITED LIABILITY COMPANY AGREEMENT OF STARKS GAS STORAGE L.L.C. This Limited Liability Company Agreement (“Agreement”) of Starks Gas Storage L.L.C. (the “Company”), dated as of May 23, 2003, is made between (a) the Company and (b) Black Bayou Gas Storage Inc., the Company’s sole member. The undersigned enter into this limited liability company agreement for the Company as follows: 1.

November 7, 2014 EX-3.49

CORPORATE ACCESS NUMBER: 2016845493 BUSINESS CORPORATIONS ACT NISKA CANADA GP ULC WAS INCORPORATED IN ALBERTA ON 2012/06/19.

Exhibit 3.49 CORPORATE ACCESS NUMBER: 2016845493 BUSINESS CORPORATIONS ACT CERTIFICATE OF INCORPORATION NISKA CANADA GP ULC WAS INCORPORATED IN ALBERTA ON 2012/06/19. FORM 1 BUSINESS CORPORATIONS ACT Alberta Articles of Incorporation 1. Name of Corporation NISKA CANADA GP ULC 2. The classes of shares, and any maximum number of shares that the corporation is authorized to issue: One class of shares

November 7, 2014 EX-12.1

STATEMENT OF COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

Exhibit 12.1 STATEMENT OF COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES Niska Predecessor Niska Six Months Year Ended March 31, Ended September 30, 2010 2011 (1) 2012 2013 2014 2014 Earnings: Net earnings (loss) before income taxes $ 121,149 $ 27,403 $ (185,459 ) $ (62,543 ) $ (19,213 ) $ (64,043 ) Less: capitalized interest (574 ) (2,018 ) (4,077 ) (2,928 ) — — Total earnings (loss) 120,575 2

November 7, 2014 EX-3.47

CERTIFICATE OF FORMATION COASTAL BEND GAS STORAGE, LLC

Exhibit 3.47 CERTIFICATE OF FORMATION OF COASTAL BEND GAS STORAGE, LLC This Certificate of Formation of Coastal Bend Gas Storage, LLC, dated as of May , 2006, is being duly executed and filed by Mary A. Viviano, as an authorized person, to form a limited liability company under the Delaware Limited Liability Company Act (6 Del. Code §18-101, et seq.). 1. NAME The name of the limited liability comp

October 31, 2014 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q x Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended September 30, 2014 OR o Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number: 001-3473

October 30, 2014 EX-99.1

NISKA GAS STORAGE PARTNERS LLC CONSOLIDATED STATEMENTS OF EARNINGS (LOSS) AND COMPREHENSIVE INCOME (LOSS) (in thousands of U.S. dollars, except for per unit amounts)

Exhibit 99.1 Niska Gas Storage Partners LLC Announces Second Quarter Results for Fiscal 2015, Declares Quarterly Distribution and Provides Update on Current Business Environment and Outlook RADNOR, PENNSYLVANIA — October 30, 2014 - Niska Gas Storage Partners LLC (NYSE:NKA) (“Niska” or “the Company”) reported today the declaration of a quarterly distribution and financial results for the three and

October 30, 2014 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 30, 2014 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 001-3473

October 10, 2014 SC 13G/A

NKA / Niska Gas Storage Partners LLC / KAYNE ANDERSON CAPITAL ADVISORS LP - KAYNE ANDERSON CAPITAL ADVISORS, LP SC 13GA 10-9-2014 (NISKA GAS STORAGE PARTNERS LLC) Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO.3) NISKA GAS STORAGE PARTNERS LLC (Name of Issuer) COMMON UNITS (Title of Class of Securities) 654678101 (CUSIP Number) Check the following box if a fee is being paid with this statement o. (A fee is not required only if the filing person: (1) has a previous

September 10, 2014 EX-99.1

Niska Gas Storage Partners LLC Announces New Member of the Board of Directors

EX-99.1 2 a14-207261ex99d1.htm EX-99.1 Exhibit 99.1 Press Release Niska Gas Storage Partners LLC Announces New Member of the Board of Directors RADNOR, PENNSYLVANIA, September 10, 2014 — Niska Gas Storage Partners LLC (NYSE: NKA) today announced the appointment of Michael J. Hennigan, to the Company’s board of directors. Mr. Hennigan is President, Chief Executive Officer and a director at Sunoco L

September 10, 2014 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): September 10, 2014 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 001-34

August 18, 2014 EX-99.1

Niska Gas Storage Partners LLC to Participate in 2014 CITI One-on-One MLP/Midstream Infrastructure Conference

Exhibit 99.1 Press Release Niska Gas Storage Partners LLC to Participate in 2014 CITI One-on-One MLP/Midstream Infrastructure Conference RADNOR, PENNSYLVANIA - August 18, 2014 — Niska Gas Storage Partners LLC (NYSE:NKA) today announced that it will be participating in the 2014 CITI One-on-One MLP/Midstream Infrastructure Conference being held August 20 — 21, 2014 in Las Vegas, Nevada. At the confe

August 18, 2014 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 18, 2014 (August 18, 2014) Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organ

August 6, 2014 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 30, 2014 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 001-34733 (

August 1, 2014 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q x Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended June 30, 2014 OR o Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number: 001-34733 Nis

July 31, 2014 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K 1 a14-1813018k.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 31, 2014 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation o

July 31, 2014 EX-99.1

NISKA GAS STORAGE PARTNERS LLC CONSOLIDATED STATEMENTS OF EARNINGS (LOSS) AND COMPREHENSIVE INCOME (LOSS) (in thousands of U.S. dollars, except for per unit amounts)

EX-99.1 2 a14-181301ex99d1.htm EX-99.1 Exhibit 99.1 Niska Declares Quarterly Distribution, Announces First Quarter Results for Fiscal 2015, Provides Update on Current Business Environment and Outlook, and Announces New Board Member RADNOR, PENNSYLVANIA — July 31, 2014 - Niska Gas Storage Partners LLC (NYSE:NKA) (“Niska” or “the Company”) reported today the declaration of a quarterly distribution a

June 30, 2014 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

8-K 1 a14-1625118k.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 25, 2014 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware 001-34733 27-1855740 (State or other jurisdicti

June 30, 2014 EX-10.1

RELEASE AND CONFIDENTIALITY AGREEMENT

Exhibit 10.1 RELEASE AND CONFIDENTIALITY AGREEMENT 1. RELEASE IN CONSIDERATION of the covenants contained herein, the payment to me of $411,347.70, less applicable statutory deductions, the terms of the email settlement letter from Brian Thiessen to Richard Smith dated June 24th, 2014 to which this Release and Confidentiality Agreement is attached (the “Settlement Letter”), and other good and valu

June 20, 2014 EX-10.1

SEPARATION AGREEMENT AND GENERAL RELEASE OF CLAIMS

Exhibit 10.1 SEPARATION AGREEMENT AND GENERAL RELEASE OF CLAIMS This Separation Agreement and General Release of Claims (this “Agreement”) is entered into between Niska Partners Management ULC (the “Company”), and Simon Dupéré (“Dupéré”). Niska Holdings L.P., a Delaware limited partnership formerly known as Niska GS Holdings Canada, L.P. (“Holdings”) and Niska Gas Storage Partners LLC (the “MLP”)

June 20, 2014 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 20, 2014 (June 18, 2014) Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organizat

May 30, 2014 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 Form 10-K

Use these links to rapidly review the document TABLE OF CONTENTS INDEX TO FINANCIAL STATEMENTS Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.

May 30, 2014 EX-21.1

LIST OF SUBSIDIARIES OF NISKA GAS STORAGE PARTNERS LLC

QuickLinks - Click here to rapidly navigate through this document Exhibit 21.1 LIST OF SUBSIDIARIES OF NISKA GAS STORAGE PARTNERS LLC Entity Jurisdiction of Organization Access Gas Services (Ontario) Inc. Ontario Access Gas Services Inc. British Columbia AECO Gas Storage Partnership Alberta Coastal Bend Gas Storage, LLC Delaware EnerStream Agency Services Inc. Ontario Niska Canada GP ULC Alberta N

May 30, 2014 EX-12.1

Statement Regarding Computation Ratios of Earnings to Fixed Charges

QuickLinks - Click here to rapidly navigate through this document Exhibit 12.1 Statement Regarding Computation Ratios of Earnings to Fixed Charges Niska Partners Niska Predecessor Year Ended March 31, 2014 2013 2012 2011 2010 Earnings: Net earnings (loss) before income taxes $ (19,213 ) $ (62,543 ) $ (185,459 ) $ 27,403 $ 121,149 Less: capitalized interest — (2,928 ) (4,077 ) (2,018 ) (574 ) Total

May 19, 2014 EX-99.1

Niska Gas Storage Partners LLC to Participate in 2014 NAPTP MLP Annual Investor Conference

EX-99.1 2 a14-130331ex99d1.htm EX-99.1 Exhibit 99.1 Press Release Niska Gas Storage Partners LLC to Participate in 2014 NAPTP MLP Annual Investor Conference HOUSTON, Texas - May 12, 2014 — Niska Gas Storage Partners LLC (NYSE:NKA) today announced that it will be participating in the 2014 National Association of Publicly Traded Partnerships (“NAPTP”) Annual Investor Conference being held on May 21

May 19, 2014 8-K

Regulation FD Disclosure, Financial Statements and Exhibits - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 16, 2014 (May 12, 2014) Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organizatio

May 13, 2014 EX-99.1

NISKA GAS STORAGE PARTNERS LLC CONSOLIDATED STATEMENTS OF EARNINGS (in thousands of U.S. dollars, except per share amounts)

Exhibit 99.1 Niska Gas Storage Partners LLC Announces Fourth-Quarter and Year-End Financial Results, Announces Resignation of Chief Executive Officer and Appointment of New Officers HOUSTON, TEXAS — May 8, 2014 - Niska Gas Storage Partners LLC (NYSE:NKA) (“Niska” or “the Company”) reported today financial results for its fourth quarter and fiscal year ended March 31, 2014. The Company also announc

May 13, 2014 EX-10.4

EMPLOYMENT AGREEMENT

Exhibit 10.4 EXECUTION VERSION EMPLOYMENT AGREEMENT This Employment Agreement (“Agreement”) is made and entered into by and between Niska Gas Storage Partners LLC, a Delaware limited liability company (the “Company”) and Bruce D. Davis, Jr. (“Employee”) effective as of May 7, 2014 (the “Effective Date”). 1. Employment. During the Employment Period (as defined in Section 4), the Company shall emplo

May 13, 2014 EX-10.3

EMPLOYMENT AGREEMENT

Exhibit 10.3 EXECUTION VERSION EMPLOYMENT AGREEMENT This Employment Agreement (“Agreement”) is made and entered into by and between Niska Gas Storage Partners LLC, a Delaware limited liability company (the “Company”) and Robert B. Wallace (“Employee”) effective as of May 7, 2014 (the “Effective Date”). 1. Employment. During the Employment Period (as defined in Section 4), the Company shall employ

May 13, 2014 EX-10.1

EMPLOYMENT AGREEMENT

Exhibit 10.1 EXECUTION VERSION EMPLOYMENT AGREEMENT This Employment Agreement (“Agreement”) is made and entered into by and between Niska Gas Storage Partners LLC, a Delaware limited liability company (the “Company”) and William H. Shea, Jr. (“Employee”) effective as of May 7, 2014 (the “Effective Date”). 1. Employment. During the Employment Period (as defined in Section 4), the Company shall empl

May 13, 2014 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 12, 2014 (May 8, 2014) Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization

May 13, 2014 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 12, 2014 (May 7, 2014) Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization

May 13, 2014 EX-10.2

EMPLOYMENT AGREEMENT

Exhibit 10.2 EXECUTION VERSION EMPLOYMENT AGREEMENT This Employment Agreement (“Agreement”) is made and entered into by and between Niska Gas Storage Partners LLC, a Delaware limited liability company (the “Company”) and Mark D. Casaday (“Employee”) effective as of May 7, 2014 (the “Effective Date”). 1. Employment. During the Employment Period (as defined in Section 4), the Company shall employ Em

May 1, 2014 CORRESP

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E. Ramey Layne [email protected] Tel +1.713.758.4629 Fax +1.713.751.5396 May 1, 2014 Mara L. Ransom Assistant Director United States Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.E. Washington, D.C. 20549-3561 Re: Niska Gas Storage Partners LLC Form 10-K for Fiscal Year Ended March 31, 2013 Filed June 7, 2013 For 10-Q for Quarterly Period Ended December 31, 2013

April 24, 2014 CORRESP

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NISKA GAS STORAGE PARTNERS LLC 1001 Fannin Street, Suite 2500 Houston, Texas 77002 (281) 404-1890 April 24, 2014 VIA EDGAR Mara L.

April 7, 2014 8-K

Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing

8-K 1 a14-998018k.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): April 2, 2014 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or

March 18, 2014 EX-4.2

REGISTRATION RIGHTS AGREEMENT by and among Niska Gas Storage Canada ULC, Niska Gas Storage Canada Finance Corp. and the Guarantors party hereto RBC Capital Markets, LLC as the Representative of the several Purchasers Dated as of March 17, 2014

Exhibit 4.2 EXECUTION VERSION REGISTRATION RIGHTS AGREEMENT by and among Niska Gas Storage Canada ULC, Niska Gas Storage Canada Finance Corp. and the Guarantors party hereto and RBC Capital Markets, LLC as the Representative of the several Purchasers Dated as of March 17, 2014 REGISTRATION RIGHTS AGREEMENT This Registration Rights Agreement (this “Agreement”) is made and entered into as of March 1

March 18, 2014 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported) March 17, 2014 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-34733 (Commission File

March 18, 2014 EX-4.1

NISKA GAS STORAGE PARTNERS LLC, as Parent, NISKA GAS STORAGE CANADA ULC and NISKA GAS STORAGE CANADA FINANCE CORP. as Issuers, AND EACH OF THE SUBSIDIARY GUARANTORS PARTY HERETO 6.50% Senior Notes Due 2019 Dated as of March 17, 2014 THE BANK OF NEW Y

Exhibit 4.1 EXECUTION VERSION NISKA GAS STORAGE PARTNERS LLC, as Parent, and NISKA GAS STORAGE CANADA ULC and NISKA GAS STORAGE CANADA FINANCE CORP. as Issuers, AND EACH OF THE SUBSIDIARY GUARANTORS PARTY HERETO 6.50% Senior Notes Due 2019 INDENTURE Dated as of March 17, 2014 THE BANK OF NEW YORK MELLON as Trustee TABLE OF CONTENTS Page ARTICLE 1 DEFINITIONS AND INCORPORATION BY REFERENCE Section

March 12, 2014 8-K

Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): March 6, 2014 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 001-34733 (

March 12, 2014 CORRESP

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E. Ramey Layne [email protected] Tel +1.713.758.4629 Fax +1.713.751.5396 March 12, 2014 William H. Thompson Accounting Branch Chief United States Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.E. Washington, D.C. 20549-3561 Re: Niska Gas Storage Partners LLC Form 10-K for Fiscal Year Ended March 31, 2013 Filed June 7, 2013 Form 10-Q for Quarterly Period Ended Dec

March 7, 2014 EX-99.1

Niska Gas Storage Partners LLC Announces Pricing of Private Placement of $575 million of Senior Notes

Exhibit 99.1 Niska Gas Storage Partners LLC Announces Pricing of Private Placement of $575 million of Senior Notes HOUSTON, TEXAS — March 7, 2014 - Niska Gas Storage Partners LLC (NYSE:NKA) (“Niska” or “the Company”) today announced the pricing of its previously announced private placement of senior unsecured notes due 2019 (the “Notes”). The Notes will be issued by two wholly owned subsidiaries o

March 7, 2014 8-K

Financial Statements and Exhibits, Other Events - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported) March 7, 2014 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware 001-34733 27-1855740 (State or other jurisdiction of incorporation) (Commis

March 3, 2014 8-K

Financial Statements and Exhibits, Other Events - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported) February 28, 2014 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware 001-34733 27-1855740 (State or other jurisdiction of incorporation) (Co

March 3, 2014 EX-99.1

Niska Gas Storage Partners LLC Announces Proposed Private Placement of $575 Million Offering of Senior Notes

Exhibit 99.1 Niska Gas Storage Partners LLC Announces Proposed Private Placement of $575 Million Offering of Senior Notes HOUSTON, TEXAS — February 28, 2014 - Niska Gas Storage Partners LLC (NYSE:NKA) (“Niska” or “the Company”) today announced, subject to market and other conditions, an offering of $575 million in aggregate principal amount of senior unsecured notes (the “Notes”) by two wholly own

February 20, 2014 SC 13D

NKA / Niska Gas Storage Partners LLC / Niska Sponsor Holdings Cooperatief U.A. - SC 13D Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 Niska Gas Storage Partners LLC (Name of Issuer) Common Units, No Par Value (Title of Class of Securities) 654678 10 1 (CUSIP Number) Dianna Rosser Aprile c/o Riverstone Holdings LLC 712 Fifth Avenue, 36th Floor New York, NY 10019 (212) 993-0076 (Name, Address and Telephone

February 5, 2014 SC 13G/A

NKA / Niska Gas Storage Partners LLC / KAYNE ANDERSON CAPITAL ADVISORS LP - KAYNE ANDERSON CAPITAL ADVISORS, L.P SC 13GA NO 2 2-4-2014 (NISKA GAS STORAGE PARTNERS LLC) Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO.2) NISKA GAS STORAGE PARTNERS LLC (Name of Issuer) COMMON UNITS (Title of Class of Securities) 654678101 (CUSIP Number) Check the following box if a fee is being paid with this statement [ ]. (A fee is not required only if the filing person: (1) has a previou

January 31, 2014 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q x Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended December 31, 2013

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q x Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended December 31, 2013 OR o Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number: 001-34733

January 31, 2014 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 31, 2014 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware 001-34733 27-1855740 (State or other jurisdiction (Commission (IRS Empl

January 30, 2014 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 30, 2014 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 001-3473

January 30, 2014 EX-99.1

NISKA GAS STORAGE PARTNERS LLC CONSOLIDATED STATEMENTS OF EARNINGS (LOSS) AND COMPREHENSIVE INCOME (LOSS) (in thousands of U.S. dollars, except for per unit amounts)

Exhibit 99.1 Niska Gas Storage Partners LLC Announces Third Quarter Financial Results for Fiscal 2014, Declares Quarterly Distribution and Provides Update on Current Business Environment HOUSTON, TEXAS — January 30, 2014 - Niska Gas Storage Partners LLC (NYSE:NKA) (“Niska” or “the Company”) reported today financial results for the three and nine months ended December 31, 2013. The Company also pro

November 4, 2013 424B5

Niska Gas Storage Partners LLC Common Units Representing Limited Liability Company Interests Having an Aggregate Offering Price of Up to $75,000,000

Use these links to rapidly review the document TABLE OF CONTENTS TABLE OF CONTENTS Table of Contents Filed Pursuant to Rule 424(b)(5) Registration No.

November 4, 2013 8-K

Financial Statements and Exhibits, Other Events - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): November 4, 2013 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 001-3473

November 4, 2013 EX-1.1

NISKA GAS STORAGE PARTNERS LLC $75,000,000 of Common Units Representing Limited Liability Company Interests Equity Distribution Agreement

Exhibit 1.1 Execution Version NISKA GAS STORAGE PARTNERS LLC $75,000,000 of Common Units Representing Limited Liability Company Interests Equity Distribution Agreement November 4, 2013 Citigroup Global Markets Inc. 388 Greenwich Street New York, New York, 10013 Ladies and Gentlemen: Niska Gas Storage Partners LLC, a Delaware limited liability company (the “Company” or “Niska”), confirms its agreem

November 1, 2013 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended September 30, 2013 OR o Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file numbe

October 31, 2013 EX-99.1

NISKA GAS STORAGE PARTNERS LLC CONSOLIDATED STATEMENTS OF EARNINGS (LOSS) AND COMPREHENSIVE INCOME (LOSS) (in thousands of U.S. dollars, except for per unit amounts)

Exhibit 99.1 Niska Gas Storage Partners LLC Announces Second Quarter Financial Results for Fiscal 2014 and Declaration of Quarterly Distribution HOUSTON, TEXAS — October 31, 2013 - Niska Gas Storage Partners LLC (NYSE:NKA) (“Niska” or “the Company”) reported today financial results for the quarter ended September 30, 2013. The Company also provided an update on its current business environment and

October 31, 2013 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 31, 2013 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 001-3473

August 16, 2013 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 16, 2013 (August 15, 2013) Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware 001-34733 27-1855740 (State or other jurisdiction of i

August 16, 2013 8-K

Regulation FD Disclosure, Financial Statements and Exhibits - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 16, 2013 (August 16, 2013) Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organ

August 16, 2013 EX-99.1

Niska Gas Storage Partners LLC to Participate in 2013 Citi MLP/Midstream Infrastructure Conference

Exhibit 99.1 Press Release Niska Gas Storage Partners LLC to Participate in 2013 Citi MLP/Midstream Infrastructure Conference HOUSTON, Texas - August 16, 2013 — Niska Gas Storage Partners LLC (NYSE:NKA) today announced that it will be participating in the 2013 Citi MLP/Midstream Infrastructure Conference being held August 21- 22, 2013 in Las Vegas, Nevada. At the conference, Simon Dupéré, Chief Ex

August 2, 2013 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended June 30, 2013 OR o Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001

August 1, 2013 EX-99.1

NISKA GAS STORAGE PARTNERS LLC CONSOLIDATED STATEMENTS OF EARNINGS (LOSS) (in thousands of U.S. dollars)

Exhibit 99.1 Niska Gas Storage Partners LLC Announces First Quarter Financial Results for Fiscal 2014, Declaration of Quarterly Distribution and Implementation of Distribution Reinvestment Plan HOUSTON, TEXAS — August 1, 2013 - Niska Gas Storage Partners LLC (NYSE:NKA) (“Niska” or “the Company”) reported today financial results for the quarter ended June 30, 2013. The Company also provided an upda

August 1, 2013 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 1, 2013 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 001-34733

July 31, 2013 S-3D

- S-3D

Use these links to rapidly review the document TABLE OF CONTENTS Table of Contents As filed with the Securities and Exchange Commission on July 31, 2013 Registration No.

July 8, 2013 8-K

Regulation FD Disclosure, Financial Statements and Exhibits - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 8, 2013 (July 8, 2013) Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organizatio

July 8, 2013 EX-99.1

Niska Gas Storage Partners LLC Obtains California Regulatory Approval for 25 Bcf Wild Goose Natural Gas Storage Capacity Expansion

Exhibit 99.1 Press Release Niska Gas Storage Partners LLC Obtains California Regulatory Approval for 25 Bcf Wild Goose Natural Gas Storage Capacity Expansion HOUSTON, Texas — July 8, 2013 — Niska Gas Storage Partners LLC (NYSE:NKA) today announced that it has received final regulatory approval from the California Public Utilities Commission (“CPUC”) to expand its Wild Goose natural gas storage fac

June 7, 2013 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 Form 10-K

Use these links to rapidly review the document TABLE OF CONTENTS TABLE OF CONTENTS 2 Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.

June 7, 2013 EX-12.1

Statement Regarding Computation Ratios

QuickLinks - Click here to rapidly navigate through this document Exhibit 12.1 Statement Regarding Computation Ratios Niska Partners Niska Predecessor Year Ended March 31, 2013 2012 2011 2010 2009 Earnings: Net earnings (loss) before income taxes $ (62,543 ) $ (185,459 ) $ 27,403 $ 121,149 $ 96,949 Less: capitalized interest (2,928 ) (4,077 ) (2,018 ) (574 ) ? Total earnings (loss) (65,471 ) (189,

June 7, 2013 EX-21.1

LIST OF SUBSIDIARIES OF NISKA GAS STORAGE PARTNERS LLC

QuickLinks - Click here to rapidly navigate through this document Exhibit 21.1 LIST OF SUBSIDIARIES OF NISKA GAS STORAGE PARTNERS LLC Entity Jurisdiction of Organization Access Gas Services (Ontario) Inc. Ontario Access Gas Services Inc. British Columbia AECO Gas Storage Partnership Alberta Coastal Bend Gas Storage, LLC Delaware EnerStream Agency Services Inc. Ontario Niska Canada GP ULC Alberta N

May 21, 2013 EX-99.1

Niska Gas Storage Partners LLC to Participate in 2013 NAPTP MLP Annual Investor Conference

Exhibit 99.1 Press Release Niska Gas Storage Partners LLC to Participate in 2013 NAPTP MLP Annual Investor Conference HOUSTON, Texas - May 16, 2013 — Niska Gas Storage Partners LLC (NYSE:NKA) today announced that it will be participating in the 2013 National Association of Publicly Traded Partnerships (“NAPTP”) Annual Investor Conference being held on May 22 and 23, 2013 at the Hilton Stamford Hot

May 21, 2013 8-K

Regulation FD Disclosure, Financial Statements and Exhibits - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 21, 2013 (May 16, 2013) Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organizatio

May 9, 2013 EX-99.1

NISKA GAS STORAGE PARTNERS LLC CONSOLIDATED STATEMENTS OF EARNINGS (in thousands of U.S. dollars)

Exhibit 99.1 Niska Gas Storage Partners LLC Announces Financial Results for the Fourth Quarter and the Fiscal Year Ended March 31, 2013 and Declares Quarterly Distribution HOUSTON, TEXAS — May 9, 2013 - Niska Gas Storage Partners LLC (NYSE:NKA) (“Niska” or “the Company”) reported today financial results for the quarter and year ended March 31, 2013. The Company also provided guidance for the fisca

May 9, 2013 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 9, 2013 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 001-34733 (Co

April 3, 2013 8-K

Regulation FD Disclosure, Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Entry into a Material Definitive Agreement, Material Modification to Rights of Security Holders, Unregistered Sales of Equity Securities, Financial Statements and Exhibits - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): April 2, 2013 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 001-34733 (

April 3, 2013 EX-99.2

Forward Looking Statements Some of the statements in this presentation concerning future performance will be forward-looking within the meaning of US securities laws. Forward-looking statements discuss our future expectations, contain projections of

Niska Gas Storage Partners LLC Equity Restructuring April 3, 2013 Exhibit 99.2 Forward Looking Statements Some of the statements in this presentation concerning future performance will be forward-looking within the meaning of US securities laws. Forward-looking statements discuss our future expectations, contain projections of results of operations or of financial condition, forecasts of future ev

April 3, 2013 EX-3.1

AMENDMENT NO. 1 TO THE FIRST AMENDED AND RESTATED OPERATING AGREEMENT OF NISKA GAS STORAGE PARTNERS LLC

Exhibit 3.1 Execution Version AMENDMENT NO. 1 TO THE FIRST AMENDED AND RESTATED OPERATING AGREEMENT OF NISKA GAS STORAGE PARTNERS LLC This Amendment No. 1 (this “Amendment”) to the First Amended and Restated Operating Agreement (the “Operating Agreement”) of Niska Gas Storage Partners LLC, a Delaware limited liability company (the “Company”), is entered into effective as of April 2, 2013, by Niska

April 3, 2013 EX-3.2

SECOND AMENDED AND RESTATED OPERATING AGREEMENT NISKA GAS STORAGE PARTNERS LLC

Exhibit 3.2 Execution Version SECOND AMENDED AND RESTATED OPERATING AGREEMENT OF NISKA GAS STORAGE PARTNERS LLC TABLE OF CONTENTS Page ARTICLE I DEFINITIONS Section 1.1 Definitions 2 Section 1.2 Construction 21 ARTICLE II ORGANIZATION Section 2.1 Formation 21 Section 2.2 Name 21 Section 2.3 Registered Office; Registered Agent; Principal Office; Other Offices 21 Section 2.4 Purpose and Business 22

April 3, 2013 EX-10.1

SPONSOR EQUITY RESTRUCTURING AGREEMENT by and among Niska Gas Storage Partners LLC, Niska Sponsor Holdings Coöperatief U.A. Dated as of April 2, 2013

Exhibit 10.1 Execution Version SPONSOR EQUITY RESTRUCTURING AGREEMENT by and among Niska Gas Storage Partners LLC, and Niska Sponsor Holdings Coöperatief U.A. Dated as of April 2, 2013 SPONSOR EQUITY RESTRUCTURING AGREEMENT THIS SPONSOR EQUITY RESTRUCTURING AGREEMENT (this “Agreement”) dated as of April 2, 2013 (the “Closing Date”), is entered into by and among Niska Gas Storage Partners LLC, a De

April 3, 2013 EX-99.1

Marginal Percentage Interest in Cash Distributions

Exhibit 99.1 Niska Gas Storage Partners LLC Announces Equity Restructuring and Elimination of Subordinated Units Houston, Texas — April 2, 2013 - Niska Gas Storage Partners LLC (NYSE: NKA) (“Niska” or the “Company”) announced today the completion of an equity restructuring with affiliates of Carlyle/Riverstone Energy and Power Fund II and Carlyle/Riverstone Energy and Power Fund III (collectively

February 4, 2013 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended December 31, 2012 OR o Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number

January 31, 2013 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 31, 2013 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 001-3473

January 31, 2013 EX-99.1

NISKA GAS STORAGE PARTNERS LLC CONSOLIDATED STATEMENTS OF EARNINGS (LOSS) (in thousands of U.S. dollars, except for per unit amounts)

EX-99.1 2 a13-40341ex99d1.htm EX-99.1 Exhibit 99.1 Niska Gas Storage Partners LLC Announces Financial Results for the Third Quarter of the Fiscal Year Ending March 31, 2013 and declares Quarterly Distribution HOUSTON, TEXAS — January 31, 2013 - Niska Gas Storage Partners LLC (NYSE:NKA) (“Niska” or “the Company”) reported today financial results for the quarter and nine months ended December 31, 20

January 10, 2013 SC 13G/A

NKA / Niska Gas Storage Partners LLC / KAYNE ANDERSON CAPITAL ADVISORS LP - KAYNE ANDERSON CAPITAL ADVISORS LP SC 13G A #1 1-9-2013 (NISKA GAS STORAGE PARTNERS LLC) Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO.1) NISKA GAS STORAGE PARTNERS LLC (Name of Issuer) COMMON UNITS (Title of Class of Securities) 654678101 (CUSIP Number) Check the following box if a fee is being paid with this statement o. (A fee is not required only if the filing person: (1) has a previous

January 8, 2013 CORRESP

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Ramey Layne [email protected] Tel +1.713.758.4629 Fax +1.713.751.5396 January 8, 2013 Andrew D. Mew Accounting Branch Chief United States Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.E. Washington, D.C. 20549-3561 Re: Niska Gas Storage Partners LLC Form 10-K for the Fiscal Year Ended March 31, 2012 Filed June 11, 2012 File 001-34733 Ladies and Gentlemen: On beh

December 21, 2012 CORRESP

-

NISKA GAS STORAGE PARTNERS LLC 1001 Fannin Street, Suite 2500 Houston, Texas 77002 (281) 404-1890 December 21, 2012 VIA EDGAR Andrew D.

November 27, 2012 8-K

Regulation FD Disclosure, Financial Statements and Exhibits - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): November 27, 2012 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 001-347

November 27, 2012 EX-99.1

Niska Gas Storage Partners LLC to Participate in Wells Fargo Pipeline, MLP and Energy Symposium

Exhibit 99.1 Press Release Niska Gas Storage Partners LLC to Participate in Wells Fargo Pipeline, MLP and Energy Symposium HOUSTON, November 27, 2012 — Niska Gas Storage Partners LLC (NYSE:NKA) today announced that it will be participating in the 2012 Wells Fargo Annual Pipeline, MLP and Energy Symposium on December 4, 2012. At the conference, Simon Dupéré, Chief Executive Officer, Vance Powers, C

November 9, 2012 CORRESP

-

Ramey Layne [email protected] Tel +1.212.237.0135 Fax +1.917.849.5349 Via EDGAR November 9, 2012 Andrew D. Mew Accounting Branch Chief United States Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.E. Washington, D.C. 20549-3561 Re: Niska Gas Storage Partners LLC Form 10-K for the Fiscal Year Ended March 31, 2012 Filed June 11, 2012 Form 10-Q for the Quarterly Peri

November 8, 2012 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended September 30, 2012 OR o Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file numbe

November 5, 2012 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): November 2, 2012 (November 1, 2012) Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or org

October 31, 2012 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 31, 2012 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 001-3473

October 31, 2012 EX-99.1

NISKA GAS STORAGE PARTNERS LLC CONSOLIDATED STATEMENTS OF EARNINGS (LOSS) (in thousands of U.S. dollars, except for per unit amounts)

Exhibit 99.1 Niska Gas Storage Partners LLC Announces Second Quarter Financial Results for Fiscal 2013 HOUSTON, TEXAS — October 31, 2012 - Niska Gas Storage Partners LLC (NYSE:NKA) (“Niska” or “the Company”) reported today financial results for the quarter and six months ended September 30, 2012. The Company also provided an update on its current business environment and outlook. Financial Results

August 15, 2012 8-K

Regulation FD Disclosure, Financial Statements and Exhibits - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 15, 2012 (August 15, 2012) Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organ

August 15, 2012 EX-99.1

Niska Gas Storage Partners LLC to Participate in CITI MLP Conference

Exhibit 99.1 Press Release Niska Gas Storage Partners LLC to Participate in CITI MLP Conference HOUSTON, August 15, 2012 — Niska Gas Storage Partners LLC. (NYSE:NKA) today announced that it will be participating in the 2012 CITI MLP/Midstream Conference on August 22 and 23, 2012, in Las Vegas, Nevada. At the conference, Simon Dupéré, Chief Executive Officer, Vance Powers, Chief Financial Officer,

August 10, 2012 10-Q/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q/A Amendment No. 1

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q/A Amendment No. 1 (Mark One) x Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended June 30, 2012 OR o Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commissi

August 3, 2012 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended June 30, 2012 OR o Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 1-3

August 2, 2012 EX-99.1

NISKA GAS STORAGE PARTNERS LLC CONSOLIDATED STATEMENTS OF EARNINGS (LOSS) (in thousands of U.S. dollars)

Exhibit 99.1 Niska Gas Storage Partners LLC Announces First Quarter Financial Results for Fiscal 2013 HOUSTON, TEXAS — August 2, 2012 - Niska Gas Storage Partners LLC (NYSE:NKA) (“Niska” or “the Company”) reported today financial results for the quarter ended June 30, 2012. The Company also provided an update on its current business environment and outlook. Financial Results Adjusted EBITDA (as de

August 2, 2012 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 2, 2012 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware 001-34733 27-1855740 (State or other jurisdiction (Commission (IRS Employ

July 5, 2012 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 5, 2012 (June 29, 2012) Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organizati

July 5, 2012 EX-10.1

AMENDED & RESTATED CREDIT AGREEMENT Dated as of June 29, 2012 among NISKA GAS STORAGE US, LLC, as US Borrower, AECO GAS STORAGE PARTNERSHIP, as Canadian Borrower, NISKA GAS STORAGE PARTNERS LLC, as Holdings, ROYAL BANK OF CANADA, as Administrative Ag

Exhibit 10.1 Execution Copy AMENDED & RESTATED CREDIT AGREEMENT Dated as of June 29, 2012 among NISKA GAS STORAGE US, LLC, as US Borrower, AECO GAS STORAGE PARTNERSHIP, as Canadian Borrower, NISKA GAS STORAGE PARTNERS LLC, as Holdings, ROYAL BANK OF CANADA, as Administrative Agent and Collateral Agent and The Other Lenders Party Hereto and RBC CAPITAL MARKETS, MORGAN STANLEY SENIOR FUNDING, INC.,

June 13, 2012 8-K

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 13, 2012 (June 7, 2012) Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organizati

June 11, 2012 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 Form 10-K

Use these links to rapidly review the document TABLE OF CONTENTS INDEX TO FINANCIAL STATEMENTS Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.

June 11, 2012 EX-12.1

Niska Niska Predecessor Year Ended March 31, 2012 2011 2010 2009 2008 Earnings: Net (loss) earnings before income taxes (185,459 ) 27,403 121,149 96,949 44,965 Less: capitalized interest (4,077 ) (2,018 ) (574 ) ? ? Total (loss) earnings (189,536 ) 2

QuickLinks - Click here to rapidly navigate through this document Exhibit 12.1 Niska Niska Predecessor Year Ended March 31, 2012 2011 2010 2009 2008 Earnings: Net (loss) earnings before income taxes (185,459 ) 27,403 121,149 96,949 44,965 Less: capitalized interest (4,077 ) (2,018 ) (574 ) ? ? Total (loss) earnings (189,536 ) 25,385 120,575 96,949 44,965 Fixed Charges Interest and debt expense 74,

May 30, 2012 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 30, 2012 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 001-34733 (C

May 30, 2012 EX-99.1

NISKA GAS STORAGE PARTNERS LLC SELECTED FINANCIAL DATA AND NON-GAAP RECONCILIATIONS (in thousands of U.S. dollars, except capacity amounts)

Exhibit 99.1 CORRECTION - Niska Gas Storage Partners LLC Announces Year End Financial Results for Fiscal 2012; Places 15 Bcf Expansion of Wild Goose Facility Into Service; and Provides Guidance for Fiscal 2013 HOUSTON, TEXAS — May 30, 2012 — In Niska Gas Storage Partners LLC’s (NYSE:NKA) (“Niska” or “the Company”) recent Fiscal 2012 Earnings Release, for the period ended March 31, 2012, the amount

May 22, 2012 EX-99.1

NISKA GAS STORAGE PARTNERS LLC CONSOLIDATED STATEMENTS OF EARNINGS (in thousands of U.S. dollars)

Exhibit 99.1 Niska Gas Storage Partners LLC Announces Year End Financial Results for Fiscal 2012; Places 15 Bcf Expansion of Wild Goose Facility Into Service; and Provides Guidance for Fiscal 2013 HOUSTON, TEXAS — May 22, 2012 - Niska Gas Storage Partners LLC (NYSE:NKA) (“Niska” or “the Company”) reported today financial results for the quarter and year ended March 31, 2012. The Company also provi

May 22, 2012 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 22, 2012 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 001-34733 (C

April 30, 2012 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): April 30, 2012 (April 24, 2012) Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organiz

April 30, 2012 EX-10.1

EXECUTIVE EMPLOYMENT AGREEMENT

Exhibit 10.1 EXECUTIVE EMPLOYMENT AGREEMENT This Executive Employment Agreement (the “Agreement”) is made and entered into as of April 24, 2012 (the “Effective Date”), by and between Simon Dupéré (the “Executive”) and Niska Partners Management ULC (the “Company”). WHEREAS, the Company desires to continue to employ the Executive on the terms and conditions set forth herein; WHEREAS, the Executive d

March 30, 2012 8-K

Regulation FD Disclosure - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): March 30, 2012 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 001-34733

February 29, 2012 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 29, 2012 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 001-347

February 29, 2012 EX-99.1

Niska Gas Storage Partners LLC to Participate in Morgan Stanley MLP and Diversified Natural Gas Corporate Access Event

Exhibit 99.1 Press Release Niska Gas Storage Partners LLC to Participate in Morgan Stanley MLP and Diversified Natural Gas Corporate Access Event HOUSTON, February 29, 2012 — Niska Gas Storage Partners LLC. (NYSE:NKA) today announced that it will be participating in the Morgan Stanley MLP and Diversified Natural Gas Corporate Access Event in New York, New York, on March 7, 2012. At the conference,

February 14, 2012 SC 13G/A

NKA / Niska Gas Storage Partners LLC / C/R Energy GP III, LLC - SC 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* Niska Gas Storage Partners LLC (Name of Issuer) Common Units Representing Non-Managing Member Interests, No Par Value (Title of Class of Securities) 654678 10 1 (CUSIP Number) December 31, 2011 (Date of Event Which Requires Filing of this Statement) Chec

February 10, 2012 SC 13G/A

NKA / Niska Gas Storage Partners LLC / TORTOISE CAPITAL ADVISORS, L.L.C. - NISKA GAS STORAGE PARTNERS, LLC Passive Investment

SC 13G/A 1 sch13g020912.htm NISKA GAS STORAGE PARTNERS, LLC SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. One)* Niska Gas Storage Partners LLC (Name of Issuer) Common Units (Title of Class of Securities) 654678101 (CUSIP Number) December 31, 2011 (Date of Event Which Requires Filing of this Statement) Check the app

February 8, 2012 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended December 31, 2011 OR o Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number

February 7, 2012 SC 13G

NKA / Niska Gas Storage Partners LLC / KAYNE ANDERSON CAPITAL ADVISORS LP - KAYNE ANDERSON CAPITAL ADVISORS SC 13G 2-7-2012 (NISKA GAS) Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO.) NISKA GAS STORAGE PARTNERS LLC (Name of Issuer) COMMON UNITS (Title of Class of Securities) 654678101 (CUSIP Number) Check the following box if a fee is being paid with this statement o. (A fee is not required only if the filing person: (1) has a previous s

February 2, 2012 EX-99.1

North America: 1-800-573-4842 International: 1-617-224-4327 Access Code: 46009314

Exhibit 99.1 Niska Gas Storage Partners LLC Announces Third Quarter Financial Results and Provides Update on Operations and Guidance Announces No Change to Common Unit Distribution and Continued Suspension of Subordinated Unit Distribution HOUSTON, TEXAS - February 2, 2012 - Niska Gas Storage Partners LLC (NYSE:NKA) (“Niska” or “the Company”) reported today financial results for its fiscal quarter

February 2, 2012 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 2, 2012 (February 2, 2012) Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware 001-34733 27-1855740 (State or other jurisdiction (C

November 15, 2011 8-K

Regulation FD Disclosure

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): November 15, 2011 (November 14, 2011) Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or o

November 15, 2011 EX-24

POWER OF ATTORNEY For Executing Forms 3, 4 and 5

POWER OF ATTORNEY POWER OF ATTORNEY For Executing Forms 3, 4 and 5 Know all by these present, that the undersigned hereby constitutes and appoints each of Jason A.

November 14, 2011 S-8

As filed with the Securities and Exchange Commission on November 14, 2011

As filed with the Securities and Exchange Commission on November 14, 2011 Registration No.

November 7, 2011 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

10-Q 1 a11-25567110q.htm 10-Q Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended September 30, 2011 OR o Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period

November 7, 2011 EX-10.1

COMMON UNIT PURCHASE AGREEMENT

Exhibit 10.1 EXECUTION VERSION COMMON UNIT PURCHASE AGREEMENT This COMMON UNIT PURCHASE AGREEMENT (this “Agreement”) is made as of August 24, 2011 by and between Niska Gas Storage Partners LLC, a Delaware limited liability company (“Niska”), and Niska Sponsor Holdings Coöperatief U.A., a coöperatief formed in the Netherlands (“Purchaser”). RECITALS: WHEREAS, Niska desires to sell and Purchaser des

November 7, 2011 EX-4.1

AMENDMENT NO. 1 TO REGISTRATION RIGHTS AGREEMENT

Exhibit 4.1 EXECUTION VERSION AMENDMENT NO. 1 TO REGISTRATION RIGHTS AGREEMENT This AMENDMENT NO. 1 TO REGISTRATION RIGHTS AGREEMENT (this ?Agreement?) is made as of August 24, 2011 by and between Niska Gas Storage Partners LLC, a Delaware limited liability company (?Niska?), and Niska Sponsor Holdings Co?peratief U.A., a co?peratief formed in the Netherlands (?Holdco?). RECITALS: WHEREAS, concurr

November 4, 2011 CORRESP

NISKA GAS STORAGE PARTNERS LLC 1001 Fannin Street, Suite 2500 Houston, TX 77002 281-404-1890

NISKA GAS STORAGE PARTNERS LLC 1001 Fannin Street, Suite 2500 Houston, TX 77002 281-404-1890 Via EDGAR November 4, 2011 Attention: Mara Ransom U.

November 3, 2011 EX-99.1

NISKA GAS STORAGE PARTNERS LLC CONSOLIDATED STATEMENTS OF EARNINGS (LOSS) (in thousands of U.S. dollars)

Exhibit 99.1 Niska Gas Storage Partners LLC Announces Second Quarter Results and Provides Update on Operations and Guidance Announces No Change to Common Unit Distribution and Suspension of Subordinated Unit Distributions HOUSTON, TEXAS - November 3, 2011 - Niska Gas Storage Partners LLC (NYSE:NKA) (?Niska?) reported today financial results for its fiscal quarter ended September 30, 2011. The Comp

November 3, 2011 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): November 3, 2011 (November 3, 2011) Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware 001-34733 27-1855740 (State or other jurisdiction of

October 24, 2011 CORRESP

[Remainder of page intentionally left blank]

E. Ramey Layne [email protected] Tel 212.237.0135 Fax 917.849.5349 October 24, 2011 Via EDGAR Mara Ransom Legal Branch Chief Division of Corporation Finance United States Securities and Exchange Commission 100 F Street, N.E. Washington, D.C. 20549 Re: Niska Gas Storage Partners LLC Amendment No. 3 to Registration Statement on Form S-3 Filed October 5, 2011 File No. 333-174988 Dear Ms. Ransom: On be

October 24, 2011 EX-5.3

PATTERSON Barristers & Solicitors

Exhibit 5.3 PATTERSON ADAMS Barristers & Solicitors John D. Patterson (2004) David Adams Les Jamieson* Associate Counsel: Jack Angus Craig Beveridge* 402 - 707 Fort St. Victoria BC Canada Mailing Address: PO Box 1231 Victoria BC Canada V8W 2T6 Writer’s Direct Line: 250-383-8312 Phone: 250- 360-2991 Fax: 250- 360-2979 *Denotes Personal Law Corporation October 24, 2011 Niska Gas Storage Partners LLC

October 24, 2011 S-3/A

As filed with the Securities and Exchange Commission on October 24, 2011

QuickLinks - Click here to rapidly navigate through this document As filed with the Securities and Exchange Commission on October 24, 2011 Registration No.

October 24, 2011 EX-5.4

Niska Partners Co?peratief U.A.

Exhibit 5.4 Advocaten Notarissen Belastingadviseurs To Niska Partners Coöperatief U.A. (the “Cooperative”) Claude Debussylaan 80 P.O. Box 75084 1070 AB Amsterdam T +31 20 577 1771 F +31 20 577 1775 Date 24 October 2011 J.M. van Dijk Advocaat Our ref. M11156523/1/20512732/SD Dear Sir/Madam, Niska Partners Coöperatief U.A. 1 Introduction I act as Dutch legal adviser (advocaat) to the Cooperative in

October 5, 2011 S-3/A

As filed with the Securities and Exchange Commission on October 4, 2011

Use these links to rapidly review the document TABLE OF CONTENTS As filed with the Securities and Exchange Commission on October 4, 2011 Registration No.

October 5, 2011 EX-5.3

PATTERSON Barristers & Solicitors

Exhibit 5.3 PATTERSON ADAMS Barristers & Solicitors John D. Patterson (2004) David Adams Les Jamieson* Associate Counsel: Jack Angus Craig Beveridge* 402 - 707 Fort St. Victoria BC Canada Mailing Address: PO Box 1231 Victoria BC Canada V8W 2T6 Writer’s Direct Line: 250-383-8312 Phone: 250- 360-2991 Fax: 250- 360-2979 *Denotes Personal Law Corporation October 4, 2011 Niska Gas Storage Partners LLC

October 4, 2011 CORRESP

[Remainder of page intentionally left blank]

E. Ramey Layne [email protected] Tel 212.237.0135 Fax 917.849.5349 October 4, 2011 Via EDGAR Mara Ransom Legal Branch Chief Division of Corporation Finance United States Securities and Exchange Commission 100 F Street, N.E. Washington, D.C. 20549 Re: Niska Gas Storage Partners LLC Amendment No. 2 to Registration Statement on Form S-3 Filed September 2, 2011 File No. 333-174988 Dear Ms. Ransom: On b

September 2, 2011 EX-5.4

Niska Partners Co?peratief U.A.

Exhibit 5.4 Advocaten Notarissen Belastingadviseurs Claude Debussylaan 80 To Niska Partners Coöperatief U.A. (the “Cooperative”) P.O. Box 75084 1070 AB Amsterdam T +31 20 577 1771 F +31 20 577 1775 Date 2 September 2011 J. M. van Dijk Advocaat Our ref. M10900451/3/20512732/SH Dear Sir/Madam, Niska Partners Coöperatief U.A. 1 Introduction I act as Dutch legal adviser (advocaat) to the Cooperative i

September 2, 2011 EX-24

POWER OF ATTORNEY For Executing Forms 3, 4 and 5

POWER OF ATTORNEY POWER OF ATTORNEY For Executing Forms 3, 4 and 5 Know all by these present, that the undersigned hereby constitutes and appoints each of Jason A.

September 2, 2011 EX-12.1

STATEMENT OF COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

QuickLinks - Click here to rapidly navigate through this document Exhibit 12.1 STATEMENT OF COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES Niska Niska Predecessor Year Ended March 31, Period from May 12, 2006 to March 31, 2007 Three Months Ended June 30, 2011 2011 2010 2009 2008 ($ in thousands) Earnings: Net earnings (loss) before income taxes $ (835 ) $ 27,403 $ 121,149 $ 96,949 $ 44,965 $ 41

September 2, 2011 EX-5.3

PATTERSON Barristers & Solicitors

Exhibit 5.3 PATTERSON ADAMS Barristers & Solicitors John D. Patterson (2004) David Adams Les Jamieson* Associate Counsel: Jack Angus Craig Beveridge* 402 - 707 Fort St. Victoria BC Canada Mailing Address: PO Box 1231 Victoria BC Canada V8W 2T6 Writer=s Direct Line: 250-383-8312 Phone: 250- 360-2991 Fax: 250- 360-2979 *Denotes Personal Law Corporation September 2, 2011 Niska Gas Storage Partners LL

September 2, 2011 S-3/A

As filed with the Securities and Exchange Commission on September 2, 2011

Use these links to rapidly review the document TABLE OF CONTENTS Table of Contents As filed with the Securities and Exchange Commission on September 2, 2011 Registration No.

August 26, 2011 EX-24

POWER OF ATTORNEY For Executing Forms 3, 4 and 5

POWER OF ATTORNEY POWER OF ATTORNEY For Executing Forms 3, 4 and 5 Know all by these present, that the undersigned hereby constitutes and appoints each of Jason A.

August 24, 2011 EX-10.1

COMMON UNIT PURCHASE AGREEMENT

Exhibit 10.1 EXECUTION VERSION COMMON UNIT PURCHASE AGREEMENT This COMMON UNIT PURCHASE AGREEMENT (this “Agreement”) is made as of August 24, 2011 by and between Niska Gas Storage Partners LLC, a Delaware limited liability company (“Niska”), and Niska Sponsor Holdings Coöperatief U.A., a coöperatief formed in the Netherlands (“Purchaser”). RECITALS: WHEREAS, Niska desires to sell and Purchaser des

August 24, 2011 EX-4.1

AMENDMENT NO. 1 TO REGISTRATION RIGHTS AGREEMENT

Exhibit 4.1 EXECUTION VERSION AMENDMENT NO. 1 TO REGISTRATION RIGHTS AGREEMENT This AMENDMENT NO. 1 TO REGISTRATION RIGHTS AGREEMENT (this “Agreement”) is made as of August 24, 2011 by and between Niska Gas Storage Partners LLC, a Delaware limited liability company (“Niska”), and Niska Sponsor Holdings Coöperatief U.A., a coöperatief formed in the Netherlands (“Holdco”). RECITALS: WHEREAS, concurr

August 24, 2011 8-K

Entry into a Material Definitive Agreement, Unregistered Sales of Equity Securities, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 24, 2011 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware 001-34733 27-1855740 (State or other jurisdiction of incorporation or or

August 22, 2011 EX-99.1

Niska Gas Storage Partners LLC to Participate at the Citigroup One-on-One MLP/Midstream Infrastructure Conference

Exhibit 99.1 Press Release Niska Gas Storage Partners LLC to Participate at the Citigroup One-on-One MLP/Midstream Infrastructure Conference HOUSTON, August 22, 2011 ? Niska Gas Storage Partners LLC (NYSE: NKA) today announced that Simon Dup?r?, Interim Chief Executive Officer and Chief Operating Officer, Vance Powers, Chief Financial Officer and Rick Staples, Senior Vice-President, Commercial wil

August 22, 2011 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 22, 2011 (August 22, 2011)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 22, 2011 (August 22, 2011) Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware 001-34733 27-1855740 (State or other jurisdiction of i

August 17, 2011 EX-24

POWER OF ATTORNEY For Executing Forms 3, 4 and 5

POWER OF ATTORNEY POWER OF ATTORNEY For Executing Forms 3, 4 and 5 Know all by these present, that the undersigned hereby constitutes and appoints each of Jason A.

August 12, 2011 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended June 30, 2011 OR o Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 1-3

August 11, 2011 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K 1 a11-2420918k.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 10, 2011 (August 10, 2011) Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdictio

August 11, 2011 EX-99.1

NISKA GAS STORAGE PARTNERS LLC CONSOLIDATED STATEMENTS OF EARNINGS (LOSS) (in thousands of U.S. dollars)

Exhibit 99.1 Niska Gas Storage Partners LLC Announces Results for the First Quarter Ended June 30, 2011 Houston, Texas — August 10, 2011 - Niska Gas Storage Partners LLC (“Niska”) (NYSE: NKA) reported today Adjusted EBITDA (as defined below) for its first fiscal quarter ended June 30, 2011 of $38.6 million, compared to Adjusted EBITDA of $35.2 million for the fiscal quarter ended June 30, 2010. Ca

July 26, 2011 EX-99.1

Niska Gas Storage Partners LLC Declares Quarterly Distribution and Announces Dates for Earnings Release and Analysts’ Conference Call

Exhibit 99.1 Press Release Niska Gas Storage Partners LLC Declares Quarterly Distribution and Announces Dates for Earnings Release and Analysts? Conference Call HOUSTON, July 26, 2011 - Niska Gas Storage Partners LLC (NYSE:NKA) today announced a cash distribution of $0.35 per common and subordinated unit. The distribution will be payable on Friday, August 12, 2011 to unit holders of record at the

July 26, 2011 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 26, 2011 (July 26, 2011) Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organizat

July 22, 2011 EX-4.1

[Form of Senior Indenture] [NISKA GAS STORAGE PARTNERS LLC] [NISKA GAS STORAGE US, LLC] [NISKA GAS STORAGE US FINANCE CORP.] [NISKA GAS STORAGE CANADA ULC] [NISKA GAS STORAGE CANADA FINANCE CORP.] Subsidiary Guarantors party hereto, [ ], as Trustee D

Exhibit 4.1 [Form of Senior Indenture] [NISKA GAS STORAGE PARTNERS LLC] [NISKA GAS STORAGE US, LLC] [NISKA GAS STORAGE US FINANCE CORP.] [NISKA GAS STORAGE CANADA ULC] [NISKA GAS STORAGE CANADA FINANCE CORP.] Subsidiary Guarantors party hereto, and [ ], as Trustee INDENTURE Dated as of Debt Securities CROSS-REFERENCE TABLE TIA Section Indenture Section 310 (a) 7.10 (b) 7.10 (c) N.A. 311 (a) 7.11 (

July 22, 2011 EX-4.2

[Form of Subordinated Indenture] [NISKA GAS STORAGE PARTNERS LLC] [NISKA GAS STORAGE US, LLC] [NISKA GAS STORAGE US FINANCE CORP.] [NISKA GAS STORAGE CANADA ULC] [NISKA GAS STORAGE CANADA FINANCE CORP.] Subsidiary Guarantors party hereto, [ ], as Tru

Exhibit 4.2 [Form of Subordinated Indenture] [NISKA GAS STORAGE PARTNERS LLC] [NISKA GAS STORAGE US, LLC] [NISKA GAS STORAGE US FINANCE CORP.] [NISKA GAS STORAGE CANADA ULC] [NISKA GAS STORAGE CANADA FINANCE CORP.] Subsidiary Guarantors party hereto, and [ ], as Trustee INDENTURE Dated as of Debt Securities CROSS-REFERENCE TABLE TIA Section Indenture Section 310 (a) 7.10 (b) 7.10 (c) N.A. 311 (a)

July 22, 2011 EX-24.2

POWER OF ATTORNEY

Exhibit 24.2 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes and appoints Darin T. Olson and Jason A. Dubchak, and each of them, his true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign any and all amendments to this regis

July 22, 2011 S-3/A

As filed with the Securities and Exchange Commission on July 21, 2011

Use these links to rapidly review the document TABLE OF CONTENTS Table of Contents As filed with the Securities and Exchange Commission on July 21, 2011 Registration No.

July 21, 2011 CORRESP

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E. Ramey Layne [email protected] Tel 212.237.0135 Fax 917.849.5349 July 21, 2011 Mara Ransom Legal Branch Chief Division of Corporation Finance United States Securities and Exchange Commission 100 F Street, N.E. Washington, D.C. 20549 Re: Niska Gas Storage Partners LLC Registration Statement on Form S-3 Filed June 17, 2011 File No. 333-174988 Dear Ms. Ransom: On behalf of the Registrants, as define

June 17, 2011 EX-12.1

STATEMENT OF COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

QuickLinks - Click here to rapidly navigate through this document Exhibit 12.1 STATEMENT OF COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES Niska Niska Predecessor Year Ended March 31, Period from May 12, 2006 to March 31, 2007 2011 2010 2009 2008 Earnings: Net earnings (loss) before income taxes 27,403 121,149 96,949 44,965 41,358 Less: capitalized interest (2,018 ) (574 ) — — — Total earnings

June 17, 2011 S-3

As filed with the Securities and Exchange Commission on June 17, 2011

Use these links to rapidly review the document TABLE OF CONTENTS Table of Contents As filed with the Securities and Exchange Commission on June 17, 2011 Registration No.

June 15, 2011 EX-12.1

Niska Niska Predecessor Year Ended March 31, Period from May 12, 2006 to March 31, 2007 2011 2010 2009 2008 Earnings: Net earnings (loss) before income taxes 27,403 121,149 96,949 44,965 41,358 Less: capitalized interest (2,018 ) (574 ) ? ? ? Total e

QuickLinks - Click here to rapidly navigate through this document Exhibit 12.1 Niska Niska Predecessor Year Ended March 31, Period from May 12, 2006 to March 31, 2007 2011 2010 2009 2008 Earnings: Net earnings (loss) before income taxes 27,403 121,149 96,949 44,965 41,358 Less: capitalized interest (2,018 ) (574 ) — — — Total earnings 25,385 120,575 96,949 44,965 41,358 Fixed Charges: Interest and

June 15, 2011 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 Form 10-K

Use these links to rapidly review the document TABLE OF CONTENTS INDEX TO FINANCIAL STATEMENTS Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.

June 10, 2011 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 10, 2011 (June 8, 2011) Nisk

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 10, 2011 (June 8, 2011) Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organizati

May 20, 2011 EX-99.1

Niska Gas Storage Partners LLC to Present at the NAPTP 2011 MLP Investor Conference

Exhibit 99.1 Press Release Niska Gas Storage Partners LLC to Present at the NAPTP 2011 MLP Investor Conference HOUSTON, May 20, 2011 — Niska Gas Storage Partners LLC (NYSE: NKA) today announced that it will be participating in the 2011 National Association of Publicly Traded Partnerships’ (“NAPTP”) Annual Investor Conference on May 25, 2011, in Greenwich, Connecticut. At the conference, David Pope

May 20, 2011 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 20, 2011 (May 20, 2011) Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware 001-34733 27-1855740 (State or other jurisdiction (Commissio

May 18, 2011 EX-99.1

NISKA GAS STORAGE PARTNERS LLC CONSOLIDATED STATEMENTS OF EARNINGS (in thousands of U.S. dollars)

Exhibit 99.1 Niska Gas Storage Partners LLC Announces Results for the Fourth Quarter and Fiscal Year ended March 31, 2011 Houston, Texas — May 18, 2011 - Niska Gas Storage Partners LLC (“Niska”) (NYSE: NKA) reported today Adjusted EBITDA (as defined below) for its fiscal year ended March 31, 2011 of $195.5 million, consistent with the Company’s previous guidance and compared to Adjusted EBITDA of

May 18, 2011 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 18, 2011 (May 18, 2011) Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organizatio

May 16, 2011 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 16, 2011 (May 12, 2011) Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organizatio

April 26, 2011 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): April 26, 2011 (April 26, 2011) Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware 001-34733 27-1855740 (State or other jurisdiction of inc

April 26, 2011 EX-99.1

Niska Gas Storage Partners LLC Declares Quarterly Distribution and Announces Dates for Earnings Release and Analysts’ Conference Call

Exhibit 99.1 Press Release Niska Gas Storage Partners LLC Declares Quarterly Distribution and Announces Dates for Earnings Release and Analysts’ Conference Call HOUSTON, April 26, 2011 — Niska Gas Storage Partners LLC. (NYSE:NKA) today announced a cash distribution of $0.35 per common and subordinated unit. The distribution will be payable on Friday, May 13, 2011 to unit holders of record at the c

March 30, 2011 EX-10.2

EXECUTIVE EMPLOYMENT AGREEMENT

Exhibit 10.2 EXECUTIVE EMPLOYMENT AGREEMENT MEMORANDUM OF AGREEMENT made as of the 1st day of April, 2011. BETWEEN: NISKA PARTNERS MANAGEMENT ULC, a body Corporate having its head office in Calgary, Alberta, (hereinafter called the “Company”) OF THE FIRST PART - and — DAVID POPE, an individual resident in Calgary, Alberta, (hereinafter called the “Executive”) OF THE SECOND PART WHEREAS the Executi

March 30, 2011 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): March 30, 2011 Niska Gas Storage

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): March 30, 2011 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 1-34733 (C

March 30, 2011 EX-10.1

NISKA GAS STORAGE PARTNERS LLC PHANTOM UNIT PERFORMANCE PLAN April 1, 2011

Exhibit 10.1 NISKA GAS STORAGE PARTNERS LLC PHANTOM UNIT PERFORMANCE PLAN April 1, 2011 NISKA GAS STORAGE PARTNERS LLC PART I PHANTOM UNIT PERFORMANCE PLAN 1. PURPOSE 1.1 The purpose of this Plan is to advance the interests of the Niska Group by: (a) increasing the proprietary interests of Participants in the Company, (b) aligning the interests of Participants with the interests of the holders of

March 14, 2011 EX-99.1

Niska Gas Storage Partners LLC to Participate in Morgan Stanley’s Corporate Access Day

Exhibit 99.1 Press Release Niska Gas Storage Partners LLC to Participate in Morgan Stanley’s Corporate Access Day HOUSTON, March 14, 2011 - Niska Gas Storage Partners LLC (NYSE:NKA) today announced that the Company will participate in the Morgan Stanley MLP and Diversified Natural Gas Corporate Access Day in New York City on Tuesday, March 15, 2011. David Pope, President and Chief Executive Office

March 14, 2011 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): March 14, 2011 Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware 001-34733 27-1855740 (State or other jurisdiction of incorporation or org

February 14, 2011 SC 13G

SECURITIES AND EXCHANGE COMMISSION

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 Niska Gas Storage Partners LLC (Name of Issuer) Common Units Representing Non-Managing Member Interests, No Par Value (Title of Class of Securities) 654678 10 1 (CUSIP Number) December 31, 2010 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designat

February 11, 2011 SC 13G

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. ___)* Niska Gas Storage Partners LLC (Name of Issuer) Common Units (Title of Class of Securities) (CUSIP Number) December

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* Niska Gas Storage Partners LLC (Name of Issuer) Common Units (Title of Class of Securities) 654678101 (CUSIP Number) December 31, 2010 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedul

February 11, 2011 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended December 31, 2010 OR o Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number

February 8, 2011 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 8, 2011 (February 8, 2011) Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or org

February 8, 2011 EX-99.1

NISKA GAS STORAGE PARTNERS LLC CONSOLIDATED STATEMENTS OF EARNINGS (LOSS) (in thousands of U.S. dollars)

Exhibit 99.1 Niska Gas Storage Partners LLC Announces Results for the Third Quarter ended December 31, 2011 Houston, Texas — February 8, 2011 - Niska Gas Storage Partners LLC (“Niska”) (NYSE: NKA) reported today Adjusted EBITDA (as defined below) for its third quarter ended December 31, 2010 of $59.9 million, compared to $86.6 million for the third quarter of fiscal 2010. Adjusted EBITDA for the n

February 7, 2011 8-K

Financial Statements and Exhibits, Changes in Registrant's Certifying Accountant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 7, 2011 (February 4, 2011) Niska Gas Storage Partners LLC (Exact name of registrant as specified in its charter) Delaware 001-34733 27-1855740 (State or other jurisdiction (C

February 7, 2011 EX-16.1

Chartered Accountants

Exhibit 16.1 KPMG LLP Chartered Accountants Telephone (403) 691-8000 2700 205 — 5th Avenue SW Telefax (403) 691-8008 Calgary AB T2P 4B9 Internet www.kpmg.ca Securities and Exchange Commission Washington, DC 20549 February 4, 2011 Dear Ladies & Gentlemen We were previously principal accountants for Niska Gas Storage Partners LLC (the “Company”) and, under the date of June 24, 2010, we reported on t

February 4, 2011 424B3

Niska Gas Storage US, LLC Niska Gas Storage US Finance Corp. Niska Gas Storage Canada ULC Niska Gas Storage Canada Finance Corp. Offer to Exchange Up To 800,000 Units, Each Consisting of $218.75 Principal Amount of 8.875% Senior Notes Due 2018 of Nis

Use these links to rapidly review the document TABLE OF CONTENTS INDEX TO FINANCIAL STATEMENTS Table of Contents Filed Pursuant to Rule 424(b)(3) Registration Statement No.

February 3, 2011 CORRESP

Niska Gas Storage Partners LLC 1001 Fannin Street, Suite 2500 Houston, TX 77002

Niska Gas Storage Partners LLC 1001 Fannin Street, Suite 2500 Houston, TX 77002 February 3, 2011 Via EDGAR Mr.

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