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

ACCEPTED 15-25-00014-CV FIFTEENTH COURT OF APPEALS AUSTIN, TEXAS 4/9/2025 3:27 PM No. 15-25-00014-CV CHRISTOPHER A. PRINE CLERK FILED IN 15th COURT OF APPEALS In the Court of Appeals AUSTIN, TEXAS for the Fifteenth District of Texas 4/9/2025 3:27:57 PM CHRISTOPHER A. PRINE Clerk Blackstone Holdings III LP, et al., Appellants, v. Primexx Energy Opportunity Fund, LP., et al., Appellees. Appeal from the First Business Court Division Dallas County, Texas Honorable Bill Whitehill, Judge Presiding Appellants’ Opening Brief Christopher J. Schwegmann Yaman Desai Texas Bar No. 24051315 Texas Bar No.…