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, and BX Primexx Topco LLC v. Primexx Energy Opportunity Fund, LP and Primexx Energy Opportunity Fund II, LP

Court of Appeals of Texas·Decided April 22, 2025·No. 15-25-00014-CV·Published

Opinion

ACCEPTED 15-25-00014-CV FIFTEENTH COURT OF APPEALS AUSTIN, TEXAS 4/22/2025 10:43 AM No. 15-25-00014-CV CHRISTOPHER A. PRINE CLERK In the Court of Appeals FILED IN 15th COURT OF APPEALS for the Fifteenth District of Texas AUSTIN, TEXAS 4/22/2025 10:43:57 AM CHRISTOPHER A. PRINE Clerk

Blackstone Holdings III LP, et al., Appellants, v.

Primexx Energy Opportunity Fund LP, 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 APPELLEES’ 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 (“Appellees”) file this first unopposed motion for a 30-day

extension of time to file Appellees’ Brief, with a new submission date of

May 29, 2025.

On March 4, 2025, the Clerk granted Appellants’ unopposed motion

for a 30-day extension of time to file Appellants’ Brief. Appellees request

a commensurate extension, which Appellants do not oppose. Appellees

require additional time given ongoing proceedings in the trial court in

this action. This is Appellees’ first request for an extension.

Appellees respectfully request that the Court grant its first

unopposed motion for a 30-day extension of time to file Appellees’ Brief,

with a new submission date of May 29, 2025.

Dated: April 22, 2025 Respectfully submitted,

SUSMAN GODFREY L.L.P.

By: /s/ Stephen Shackelford, Jr. Stephen Shackelford, Jr. State Bar No. 24062998 (TX) sshackelford@susmangodfrey.com

2 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 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

3 Facsimile: (212) 336-8340

Attorneys for Appellees

4 Certificate of Service

This is to certify that on April 22, 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 Appellees conferred with counsel for Appellants via e-

mail on April 12, 2025 regarding this motion. Appellants do not oppose

this motion.

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

5 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.

Josephine Wang on behalf of Stephen Shackelford Bar No. 24062998 jwang@susmangodfrey.com Envelope ID: 99926273 Filing Code Description: Motion Filing Description: Motion for Extension of time to file Appellees' Brief Status as of 4/22/2025 11:14 AM CST

Associated Case Party: Blackstone Holdings III LP, et al.

Name BarNumber Email TimestampSubmitted Status

David S.Coale dcoale@lynnllp.com 4/22/2025 10:43:57 AM SENT

Christopher JSchwegmann cschwegmann@lynnllp.com 4/22/2025 10:43:57 AM SENT

Christopher W.Patton cpatton@lynnllp.com 4/22/2025 10:43:57 AM SENT

Kay Ridenour kridenour@lynnllp.com 4/22/2025 10:43:57 AM SENT

Scott Smoot ssmoot@lynnllp.com 4/22/2025 10:43:57 AM SENT

Kyle A.Gardner kgardner@lynnllp.com 4/22/2025 10:43:57 AM SENT

Kerri Jones kjones@lynnllp.com 4/22/2025 10:43:57 AM SENT

Jessica Cox jcox@lynnllp.com 4/22/2025 10:43:57 AM SENT

Yaman Desai ydesai@lynnllp.com 4/22/2025 10:43:57 AM SENT

Gina Flores gflores@lynnllp.com 4/22/2025 10:43:57 AM SENT

Julie Archuleta jarchuleta@lynnllp.com 4/22/2025 10:43:57 AM SENT

Associated Case Party: Primexx Energy Opportunity Fund, LP., et al.

Name BarNumber Email TimestampSubmitted Status

Stephen Shackelford SShackelford@susmangodfrey.com 4/22/2025 10:43:57 AM SENT

Zack Ewing zack.ewing@kirkland.com 4/22/2025 10:43:57 AM SENT

Roger Cowie roger.cowie@troutman.com 4/22/2025 10:43:57 AM SENT

Taylor Levesque Taylor.Levesque@troutman.com 4/22/2025 10:43:57 AM SENT

Laura Brigham laura.brigham@kirkland.com 4/22/2025 10:43:57 AM SENT

Sarah Hannigan sHannigan@susmangodfrey.com 4/22/2025 10:43:57 AM SENT

Lindsey Eccles leccles@susmangodfrey.com 4/22/2025 10:43:57 AM SENT

Jeremy Fielding jeremy.fielding@kirkland.com 4/22/2025 10:43:57 AM SENT 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.

Josephine Wang on behalf of Stephen Shackelford Bar No. 24062998 jwang@susmangodfrey.com Envelope ID: 99926273 Filing Code Description: Motion Filing Description: Motion for Extension of time to file Appellees' Brief Status as of 4/22/2025 11:14 AM CST

Case Contacts

Name BarNumber Email TimestampSubmitted Status

Theressa Washington theressa.washington@troutman.com 4/22/2025 10:43:57 AM SENT

Josephine Wang jwang@susmangodfrey.com 4/22/2025 10:43:57 AM SENT

Bryan Caforio bcaforio@susmangodfrey.com 4/22/2025 10:43:57 AM SENT

Michelle Williams mwilliams@susmangodfrey.com 4/22/2025 10:43:57 AM SENT

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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, and BX Primexx Topco LLC v. Primexx Energy Opportunity Fund, LP and Primexx Energy Opportunity Fund II, LP, (Tex. Ct. App. 2025).

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, and BX Primexx Topco LLC v. Primexx Energy Opportunity Fund, LP and Primexx Energy Opportunity Fund II, LP (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, and BX Primexx Topco LLC v. Primexx Energy Opportunity Fund, LP and Primexx Energy Opportunity Fund II, LP) — published by Counsel Stack Legal Research, free access to 12M+ legal documents.