Aspire Power Ventures, LP v. Public Utility Commission of Texas, Electric Reliability Council of Texas, Thomas Gleeson, Lori Cobos, Jimmy Glotfelty, Kathleen Jackson, and Courtney Hjaltman

ACCEPTED 15-24-00118-CV FIFTEENTH COURT OF APPEALS AUSTIN, TEXAS 12/11/2025 5:07 PM No. 15-24-00118-CV CHRISTOPHER A. PRINE __________________________________________________________________ CLERK FILED IN 15th COURT OF APPEALS COURT OF APPEALS FOR THE AUSTIN, TEXAS FIFTEENTH DISTRICT OF TEXAS12/11/2025 5:07:47 PM AUSTIN, TEXAS CHRISTOPHER A. PRINE Clerk __________________________________________________________________ Aspire Power Ventures, LP, Appellant, v. Public Utility Commission of Texas, Electric Reliability Council of Texas, Thomas Gleeson, Lori Cobos, Jimmy Glotfelty, Kathleen Jackson, and Courtney Hjaltman, Appellees. _________________________________________________________________ On Appeal from the 345th Judicial District Court Travis County, Texas Cause No. D-1-GN-24-003384 Hon. Catherine A. Mauzy, Presiding __________________________________________________________________ APPELLANT’S NOTICE OF DESIGNATION OF LEAD COUNSEL __________________________________________________________________ Chrysta L. Castañeda Monica Latin Nicole Michael Brent M. Rubin THE CASTAÑEDA FIRM Ken Carroll N. St. Paul, Suite 2030 CARRINGTON, COLEMAN, Dallas, Texas 75201 SLOMAN & BLUMENTHAL, L.L.P. Phone: (214) 282-8579 901 Main Street, Suite 5500 Fax: (214) 602-9187 Dallas, Texas 75202 Phone: 214-855-3000 Fax: 214-580-2641 Attorneys for Appellant Aspire Power Ventures, LP Pursuant to Texas Rule of Appellate Procedure 6.1(c), Appellant Aspire Power Ventures, LP) designates Monica Latin as lead counsel for this appeal, replacing Chrysta L. Castañeda in that role. The information required by Texas Rule of Appellate Procedure 6.5(d) is provided in Monica Latin’s signature block below.

Respectfully submitted, /s/ Chrysta L. Castañeda /s/ Monica Latin Chrysta L. Castañeda Monica Latin Texas Bar No. 15325625 Texas Bar No. 00787881 [email protected] [email protected] Nicole Michael Brent M. Rubin Texas Bar No. 24067767 Texas Bar No. 24086834 [email protected] [email protected] THE CASTAÑEDA FIRM Ken Carroll N. St. Paul, Suite 2030 Texas Bar No. 03888500 Dallas, Texas 75201 [email protected] Phone: (214) 282-8579 CARRINGTON, COLEMAN, Fax: (214) 602-9187 SLOMAN & BLUMENTHAL, L.L.P. Main Street, Suite 5500 Dallas, Texas 75202 Phone: (214) 855-3000 Fax: (214) 580-2641

Attorneys for Appellant Aspire Power Ventures, LP

CERTIFICATE OF SERVICE The undersigned hereby certifies that on December 11, 2025, a true and correct copy of the foregoing document was electronically filed with the Court and served on all counsel of record through the eFiling Service Provider pursuant to the Texas Rules of Civil Procedure.

/s/ Ken Carroll Ken Carroll

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.

Ken Carroll on behalf of Ken Carroll Bar No. 3888500 [email protected] Envelope ID: 109013548 Filing Code Description: Other Document Filing Description: Appellant's Notice of Designation of Lead Counsel Status as of 12/12/2025 7:23 AM CST Case Contacts Name BarNumber Email TimestampSubmitted Status Mark Little [email protected] 12/11/2025 5:07:47 PM SENT Macey Stokes [email protected] 12/11/2025 5:07:47 PM SENT David Laurent [email protected] 12/11/2025 5:07:47 PM SENT Laura Courtney [email protected] 12/11/2025 5:07:47 PM SENT George Fibbe [email protected] 12/11/2025 5:07:47 PM SENT Patrick Leahy [email protected] 12/11/2025 5:07:47 PM SENT Brent M.Rubin [email protected] 12/11/2025 5:07:47 PM SENT Ken Carroll [email protected] 12/11/2025 5:07:47 PM SENT Elliot Clark [email protected] 12/11/2025 5:07:47 PM SENT Elin Isenhower [email protected] 12/11/2025 5:07:47 PM SENT John Hulme [email protected] 12/11/2025 5:07:47 PM SENT James ScottMcCarley [email protected] 12/11/2025 5:07:47 PM SENT Chrysta L.Castaneda [email protected] 12/11/2025 5:07:47 PM SENT Nicole Michael [email protected] 12/11/2025 5:07:47 PM SENT Monica Latin [email protected] 12/11/2025 5:07:47 PM SENT Amanda AtkinsonCagle [email protected] 12/11/2025 5:07:47 PM SENT Jordan Pratt [email protected] 12/11/2025 5:07:47 PM SENT