Primexx Energy Opportunity Fund, LP and Primexx Energy Opportunity Fund II, LP v. Primexx Energy Corporation, M. Christopher Doyle, Angelo Acconcia, Blackstone Inc., Blackstone Holdings III LP, Blackstone EMA II LLC, BMA VII LLC, Blackstone Energy Management Associates II LLC, Blackstone Energy Partners II LP, Blackstone Management Associates VII LLC, Blackstone Capital Partners VII LP, BCP VII/BEP II Holdings Manager LLC, BX Primexx Topco LLC, and BPP Holdco LLC

ACCEPTED 15-25-00095-CV FIFTEENTH COURT OF APPEALS AUSTIN, TEXAS 6/25/2025 9:52 AM No. 15-25-00095-CV CHRISTOPHER A. PRINE CLERK In the Court of Appeals FILED IN 15th COURT OF APPEALS for the Fifteenth District of Texas AUSTIN, TEXAS 6/25/2025 9:52:37 AM CHRISTOPHER A. PRINE Clerk Primexx Energy Opportunity Fund, LP, et al., Appellants, v. Primexx Energy Corporation, et al., Appellees.

Appeal from the Texas Business Court, First Division Dallas County, Texas Honorable Bill Whitehill

FIRST UNOPPOSED MOTION FOR EXTENSION OF TIME TO FILE APPELLANTS’ BRIEF

SUSMAN GODFREY L.L.P. Pro hac vice forthcoming: Stephen Shackelford, Jr. Marc M. Seltzer State Bar No. 24062998 (TX) [email protected] [email protected] Bryan Caforio 1000 Louisiana Street, Ste 5100 [email protected] Houston, Texas 77002 Lindsey Godfrey Eccles Telephone: (713) 651-9366 [email protected] Facsimile: (713) 654-6666 Sarah Hannigan [email protected]

Attorneys for Appellees Pursuant to Texas Rules of Appellate Procedure 10.5(b) and 38.6(d), Primexx Energy Opportunity Fund LP and Primexx Energy Opportunity Fund II LP (“Appellants”) file this first unopposed motion for a 30-day extension of time to file Appellants’ Brief, with a new submission date of July 28, 2025. Appellants require additional time to evaluate the record.

This is Appellants’ first request for an extension.

Appellants respectfully request that the Court grant its first unopposed motion for a 30-day extension of time to file Appellants’ Brief, with a new submission date of July 28, 2025.

Dated: June 25, 2025 Respectfully submitted, SUSMAN GODFREY L.L.P. By: /s/ Stephen Shackelford, Jr. Stephen Shackelford, Jr. State Bar No. 24062998 (TX) [email protected] SUSMAN GODFREY L.L.P. 1000 Louisiana Street, Suite 5100 Houston, Texas 77002 Telephone: (713) 651-9366 Facsimile: (713) 654-6666 Marc M. Seltzer (pro hac vice forthcoming) State Bar No. 54534 (CA) [email protected]

Bryan Caforio (pro hac vice forthcoming) State Bar No. 261265 (CA) [email protected] SUSMAN GODFREY L.L.P. 1900 Avenue of the Stars, Suite 1400 Los Angeles, CA 90067 Telephone: (310) 789-3100 Facsimile: (310) 789-3150 Lindsey Godfrey Eccles (pro hac vice forthcoming) State Bar No. 33566 (WA) [email protected] SUSMAN GODFREY L.L.P. Union Street, Suite 3000 Seattle, WA 98101 Telephone: (206) 516-3880 Facsimile: (206) 516-3883 Sarah Hannigan (pro hac vice forthcoming) State Bar No. 5961248 (NY) [email protected] SUSMAN GODFREY L.L.P. One Manhattan West New York, NY 10001 Telephone: (212) 336-8330 Facsimile: (212) 336-8340 Attorneys for Appellees

Certificate of Service

This is to certify that on June 25, 2025, a true and correct copy of the above and foregoing instrument was properly forwarded to counsel of record in accordance with Rule 21 of the Texas Rules of Civil Procedure.

/s/ Stephen Shackelford, Jr. Stephen Shackelford, Jr.

Certificate of Conference Counsel for Appellants conferred with counsel for Appellees via e- mail on June 25, 2025 regarding this motion. Appellees do not oppose this motion.

/s/ Stephen Shackelford, Jr. Stephen Shackelford, Jr.

Automated Certificate of eService This automated certificate of service was created by the efiling system.

The filer served this document via email generated by the efiling system on the date and to the persons listed below. The rules governing certificates of service have not changed. Filers must still provide a certificate of service that complies with all applicable rules.

Stephen Shackelford on behalf of Stephen Shackelford Bar No. 24062998 [email protected] Envelope ID: 102399910 Filing Code Description: Motion Filing Description: Unopposed Motion for Extension of Time to File Appellants' Brief Status as of 6/25/2025 10:08 AM CST Associated Case Party: M. CHRISTOPHER DOYLE Name BarNumber Email TimestampSubmitted Status Roger BCowie [email protected] 6/25/2025 9:52:37 AM SENT Taylor Levesque [email protected] 6/25/2025 9:52:37 AM SENT Veronica Long [email protected] 6/25/2025 9:52:37 AM SENT

Case Contacts Name BarNumber Email TimestampSubmitted Status Sarah Hannigan [email protected] 6/25/2025 9:52:37 AM SENT Bryan Caforio [email protected] 6/25/2025 9:52:37 AM SENT Michelle Williams [email protected] 6/25/2025 9:52:37 AM SENT Josephine Wang [email protected] 6/25/2025 9:52:37 AM SENT Lindsey Godfrey Eccles [email protected] 6/25/2025 9:52:37 AM SENT Marc M.Seltzer [email protected] 6/25/2025 9:52:37 AM SENT