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

Court of Appeals of Texas·Decided November 7, 2025·No. 15-25-00120-CV·Published

Opinion

ACCEPTED 15-25-00120-CV FIFTEENTH COURT OF APPEALS AUSTIN, TEXAS 11/7/2025 1:37 PM No. 15-25-00120-CV CHRISTOPHER A. PRINE CLERK FILED IN 15th COURT OF APPEALS In the Court of Appeals AUSTIN, TEXAS for the Fifteenth District of Texas 11/7/2025 1:37:38 PM CHRISTOPHER A. PRINE Clerk

Primexx Energy Opportunity Fund, LP and Primexx Energy Opportunity Fund II, LP, Appellants, 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, Appellees.

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

FIRST UNOPPOSED MOTION FOR EXTENSION OF TIME TO FILE APPELLEES’ BRIEF David S. Coale Yaman Desai dcoale@lynnllp.com ydesai@lynnllp.com Christopher J. Schwegmann Kyle A. Gardner cschwegmann@lynnllp.com kgardner@lynnllp.com Christopher W. Patton Jessica D. Cox cpatton@lynnllp.com jcox@lynnllp.com

LYNN PINKER HURST & SCHWEGMANN LLP 2100 Ross Avenue, Suite 2700 Dallas, Texas 75201 Telephone: (214) 981-3800 Facsimile: (214) 981-3839

Attorneys for Appellees 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

Jeremy A. Fielding, P.C. Zack C. Ewing jeremy.fielding@kirkland.com zack.ewing@kirkland.com Kasdin M. Mitchell, P.C. Michael C. Patton kasdin.mitchell@kirkland.com michael.patton@kirkland.com Austin J. Lesch KIRKLAND & ELLIS LLP austin.lesch@kirkland.com 4550 Travis Street Dallas, Texas 75205 KIRKLAND & ELLIS LLP Telephone: (214) 972-1770 401 West 4th Street Facsimile: (214) 972-1771 Austin, Texas 78701 Telephone: (512)-678-9100 Facsimile: (512) 678-9101

Attorneys for Appellees Primexx Energy Corporation Roger B. Cowie roger.cowie@troutman.com M. Taylor Levesque taylor.levesque@troutman.com

TROUTMAN PEPPER LOCKE LLP 2200 Ross Avenue, Suite 2800 Dallas, Texas 75201 T: (214) 740-8000 F: (214) 740-8800

Attorneys For Appellee M. Christopher Doyle TO THE HONORABLE COURT OF APPEALS:

Under Texas Rules of Appellate Procedure 10.5(b)(1) and 38.6(d),

Appellees file this first unopposed motion for an extension of time and

respectfully request a 30-day extension, or until December 15, 2025, to file

Appellees’ Brief.

I. CURRENT DEADLINE

Appellees’ Brief is currently due on Friday, November 14, 2025.

II. REASONS FOR EXTENSION

Appellees require additional time to review the record, analyze relevant

law, and prepare Appellees’ Brief. In addition to preparing Appellees’ Brief,

counsel for Appellees have been and continue to have responsibilities for

additional cases between the date of this Motion and the current deadline to

submit Appellees’ Brief. This extension of time is sought so that justice may

be done in the disposition of this case and is not sought for purposes of delay.

This is the first extension of the briefing deadline sought by Appellees.

III. REQUEST FOR RELIEF

For these reasons, Appellees request that the Court grant this First

Unopposed Motion for Extension of Time to File Appellees’ Brief, extending

the time to file Appellees’ Brief until December 15, 2025.

4 DATE: November 7, 2025 Respectfully submitted,

/s/ David S. Coale /s/ Jeremy A. Fielding David S. Coale Jeremy A. Fielding, P.C. Texas Bar No. 00787255 Texas Bar No. 24040895 dcoale@lynnllp.com jeremy.fielding@kirkland.com Christopher J. Schwegmann Kasdin M. Mitchell, P.C. Texas Bar No. 24051315 Texas Bar No. 24135030 cschwegmann@lynnllp.com kasdin.mitchell@kirkland.com Christopher W. Patton KIRKLAND & ELLIS LLP Texas Bar No. 24083634 4550 Travis Street cpatton@lynnllp.com Dallas, Texas 75205 Yaman Desai Telephone: (214) 972-1770 Texas Bar No. 24101695 Facsimile: (214) 972-1771 ydesai@lynnllp.com Kyle A. Gardner Zack C. Ewing Texas State Bar No. 24116412 Texas Bar No. 24113650 kgardner@lynnllp.com zack.ewing@kirkland.com Jessica D. Cox Michael C. Patton Texas Bar No. 24114769 Texas Bar No. 24137104 jcox@lynnllp.com michael.patton@kirkland.com Austin J. Lesch LYNN PINKER HURST & Texas Bar No. 24143116 SCHWEGMANN LLP austin.lesch@kirkland.com 2100 Ross Avenue, Suite 2700 KIRKLAND & ELLIS LLP Dallas, Texas 75201 401 West 4th Street Telephone: (214) 981-3800 Austin, Texas 78701 Facsimile: (214) 981-3839 Telephone: (512)-678-9100 Facsimile: (512) 678-9101

/s/ Roger B. Cowie_______ Roger B. Cowie Texas Bar No. 00783886 roger.cowie@troutman.com M. Taylor Levesque Texas Bar No. 24107296 taylor.levesque@troutman.com TROUTMAN PEPPER LOCKE LLP 2200 Ross Avenue, Suite 2800 Dallas, Texas 75201

5 T: (214) 740-8000 F: (214) 740-8800

Attorneys for Appellees

Certificate of Service The undersigned hereby certifies that a true and correct copy of the above and foregoing document was served on all counsel of record via eFileTexas on November 7, 2025.

/s/ Yaman Desai Yaman Desai

Certificate of Conference

The undersigned certifies that counsel for Appellants conferred with counsel for Appellants via e-mail on November 5, 2025, and the relief requested by this Motion is not opposed.

/s/ Yaman Desai Yaman Desai

6 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.

Kerri Jones on behalf of David Coale Bar No. 787255 kjones@lynnllp.com Envelope ID: 107806130 Filing Code Description: Motion Filing Description: 2025-11-07 First Unopposed Motion for Extension of Time to File Appellees' Brief Status as of 11/7/2025 2:12 PM CST

Case Contacts

Name BarNumber Email TimestampSubmitted Status

David S.Coale dcoale@lynnllp.com 11/7/2025 1:37:38 PM SENT

Christopher W.Patton cpatton@lynnllp.com 11/7/2025 1:37:38 PM SENT

Kay Ridenour kridenour@lynnllp.com 11/7/2025 1:37:38 PM SENT

Jeremy Fielding 24040895 jeremy.fielding@kirkland.com 11/7/2025 1:37:38 PM SENT

Stephen Shackelford 24062998 sshackelford@susmangodfrey.com 11/7/2025 1:37:38 PM SENT

Roger Cowie 783886 roger.cowie@troutman.com 11/7/2025 1:37:38 PM SENT

Christopher Patton 24083634 cpatton@lynnllp.com 11/7/2025 1:37:38 PM SENT

Kyle A.Gardner kgardner@lynnllp.com 11/7/2025 1:37:38 PM SENT

Scott Smoot ssmoot@lynnllp.com 11/7/2025 1:37:38 PM SENT

Yaman Desai ydesai@lynnllp.com 11/7/2025 1:37:38 PM SENT

NATALIE STALLBOHM nstallbohm@lynnllp.com 11/7/2025 1:37:38 PM SENT

SCOTT SMOOT ssmoot@lynnllp.com 11/7/2025 1:37:38 PM SENT

Chris Schwegmann cschwegmann@lynnllp.com 11/7/2025 1:37:38 PM SENT

Gina Flores gflores@lynnllp.com 11/7/2025 1:37:38 PM SENT

Julie Archuleta jarchuleta@lynnllp.com 11/7/2025 1:37:38 PM SENT

Kerri Jones kjones@lynnllp.com 11/7/2025 1:37:38 PM SENT

Zack Ewing zack.ewing@kirkland.com 11/7/2025 1:37:38 PM SENT

Kasdin Mitchell 24135030 kasdin.mitchell@kirkland.com 11/7/2025 1:37:38 PM SENT

Jessica Cox jcox@lynnllp.com 11/7/2025 1:37:38 PM SENT

Sarah Hannigan shannigan@susmangodfrey.com 11/7/2025 1:37:38 PM SENT

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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, (Tex. Ct. App. 2025).

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 (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) — published by Counsel Stack Legal Research, free access to 12M+ legal documents.