ACCEPTED 15-24-00111-CV FIFTEENTH COURT OF APPEALS AUSTIN, TEXAS 10/7/2025 3:38 PM CHRISTOPHER A. PRINE No. 15-24-00111-CV CLERK In the Court of Appeals FILED IN 15th COURT OF APPEALS AUSTIN, TEXAS For the Fifteenth Judicial District 10/7/2025 3:38:58 PM CHRISTOPHER A. PRINE Austin, Texas Clerk

Kelly Hancock, Acting Comptroller of Public Accounts of the State of Texas and Ken Paxton, Attorney General of the State of Texas, Appellants, v. ChampionX, LLC, Appellee.

On Appeal from the 419th District Court, Travis County, Texas Cause No. D-1-GN-20-000139 APPELLANTS’ NOTICE OF CHANGE OF LEAD APPELLATE COUNSEL

Appellants Kelly Hancock, Acting Comptroller of Public Accounts of the State of Texas and Ken Paxton, Attorney General of the State of Texas, designate Eduardo Montemayor whose signature and bar number appear below as lead counsel.

Eduardo Montemayor replaces Kyle Pierce Counce, who also appears below in compliance with Texas Rule of Appellate Procedure 6.1(c).

Respectfully submitted, Ken Paxton Attorney General of Texas /s/ Eduardo Montemayor Brent Webster Eduardo Montemayor First Assistant Attorney General Assistant Attorney General State Bar No. 24098128 Ralph Molina [email protected] Deputy First Assistant Attorney Tax Litigation Division MC 029 General P.O. Box 12548 Austin, Texas 78711-2548 Austin Kinghorn Telephone: (512) 463-1989 Deputy Attorney General for Civil Facsimile: (512) 478-4013 Litigation Counsel for Appellants Steven Robinson Division Chief, Tax Litigation

Texas Rule of Appellate Procedure 6.1 Compliance Former lead counsel for Appellants, Kyle Pierce Counce, signs in compliance with Texas Rule of Appellate Procedure 6.1.

/s/ Kyle Pierce Counce____ KYLE PIERCE COUNCE

Certificate of Service I certify that a copy of this document was served on all counsel of record by e- mail and/or e-service on October 7, 2025.

Deborah Sloan John M. Allan (pro hac vice) [email protected] [email protected] JONES DAY Antoinette L. Ellison (pro hace vice) 2727 N. Harwood Street [email protected] Suite 500 JONES DAY Dallas, Texas 75201-1515 1221 Peachtree Street NE Counsel for Appellee Suite 400 Atlanta, Georgia 30361 Counsel for Appellee

_/s/ Eduardo Montemayor_ EDUARDO MONTEMAYOR

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.

Mary Lou Swanson on behalf of Eduardo Montemayor Bar No. 24098128 [email protected] Envelope ID: 106559374 Filing Code Description: Other Document Filing Description: 20251007 Notice of Change of Counsel EM Status as of 10/7/2025 3:42 PM CST Associated Case Party: ChampionX, LLC Name BarNumber Email TimestampSubmitted Status Deborah Sloan 786230 [email protected] 10/7/2025 3:38:58 PM SENT Carla Dennis [email protected] 10/7/2025 3:38:58 PM SENT John MAllan [email protected] 10/7/2025 3:38:58 PM SENT Antoinette L.Ellison [email protected] 10/7/2025 3:38:58 PM SENT

Associated Case Party: Ken Paxton, Attorney General of the State of Texas Name BarNumber Email TimestampSubmitted Status Kyle PierceCounce [email protected] 10/7/2025 3:38:58 PM SENT Eduardo Montemayor [email protected] 10/7/2025 3:38:58 PM SENT