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

Opinion

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) mseltzer@susmangodfrey.com sshackelford@susmangodfrey.com Bryan Caforio 1000 Louisiana Street, Ste 5100 bcaforio@susmangodfrey.com Houston, Texas 77002 Lindsey Godfrey Eccles Telephone: (713) 651-9366 leccles@susmangodfrey.com Facsimile: (713) 654-6666 Sarah Hannigan shannigan@susmangodfrey.com

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) sshackelford@susmangodfrey.com 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) mseltzer@susmangodfrey.com

2 Bryan Caforio (pro hac vice forthcoming) State Bar No. 261265 (CA) bcaforio@susmangodfrey.com 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) leccles@susmangodfrey.com SUSMAN GODFREY L.L.P. 401 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) shannigan@susmangodfrey.com 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

3 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.

4 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 sshackelford@susmangodfrey.com 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 Roger.Cowie@troutman.com 6/25/2025 9:52:37 AM SENT

Taylor Levesque taylor.levesque@troutman.com 6/25/2025 9:52:37 AM SENT

Veronica Long Veronica.Long@troutman.com 6/25/2025 9:52:37 AM SENT

Case Contacts

Name BarNumber Email TimestampSubmitted Status

Sarah Hannigan shannigan@susmangodfrey.com 6/25/2025 9:52:37 AM SENT

Bryan Caforio bcaforio@susmangodfrey.com 6/25/2025 9:52:37 AM SENT

Michelle Williams mwilliams@susmangodfrey.com 6/25/2025 9:52:37 AM SENT

Josephine Wang jwang@susmangodfrey.com 6/25/2025 9:52:37 AM SENT

Lindsey Godfrey Eccles leccles@susmangodfrey.com 6/25/2025 9:52:37 AM SENT

Marc M.Seltzer mseltzer@susmangodfrey.com 6/25/2025 9:52:37 AM SENT