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

Opinion

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 325 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 chrysta@castaneda-firm.com MLatin@ccsb.com Nicole Michael Brent M. Rubin Texas Bar No. 24067767 Texas Bar No. 24086834 nicole@castaneda-firm.com BRubin@ccsb.com THE CASTAÑEDA FIRM Ken Carroll 325 N. St. Paul, Suite 2030 Texas Bar No. 03888500 Dallas, Texas 75201 KCarroll@ccsb.com Phone: (214) 282-8579 CARRINGTON, COLEMAN, Fax: (214) 602-9187 SLOMAN & BLUMENTHAL, L.L.P. 901 Main Street, Suite 5500 Dallas, Texas 75202 Phone: (214) 855-3000 Fax: (214) 580-2641

Attorneys for Appellant Aspire Power Ventures, LP

2 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

3 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 kcarroll@ccsb.com 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 mark.little@bakerbotts.com 12/11/2025 5:07:47 PM SENT

Macey Stokes macey.stokes@bakerbotts.com 12/11/2025 5:07:47 PM SENT

David Laurent david.laurent@oag.texas.gov 12/11/2025 5:07:47 PM SENT

Laura Courtney laura.courtney@oag.texas.gov 12/11/2025 5:07:47 PM SENT

George Fibbe george.fibbe@bakerbotts.com 12/11/2025 5:07:47 PM SENT

Patrick Leahy patrick.leahy@bakerbotts.com 12/11/2025 5:07:47 PM SENT

Brent M.Rubin brubin@ccsb.com 12/11/2025 5:07:47 PM SENT

Ken Carroll kcarroll@ccsb.com 12/11/2025 5:07:47 PM SENT

Elliot Clark eclark@winstead.com 12/11/2025 5:07:47 PM SENT

Elin Isenhower eisenhower@winstead.com 12/11/2025 5:07:47 PM SENT

John Hulme John.Hulme@oag.texas.gov 12/11/2025 5:07:47 PM SENT

James ScottMcCarley scott.mccarley@oag.texas.gov 12/11/2025 5:07:47 PM SENT

Chrysta L.Castaneda chrysta@castaneda-firm.com 12/11/2025 5:07:47 PM SENT

Nicole Michael nicole@castaneda-firm.com 12/11/2025 5:07:47 PM SENT

Monica Latin mlatin@ccsb.com 12/11/2025 5:07:47 PM SENT

Amanda AtkinsonCagle Amanda.Cagle@oag.texas.gov 12/11/2025 5:07:47 PM SENT

Jordan Pratt Jordan.Pratt@oag.texas.gov 12/11/2025 5:07:47 PM SENT