PLAINS GP HOLDINGS LP

Disclosure Controls and Procedures

We maintain written disclosure controls and procedures, which we refer to as our “DCP.” Our DCP is designed to ensure that information required to be disclosed by us in reports that we file under the Securities Exchange Act of 1934 (the “Exchange Act”) is (i) recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, and (ii) accumulated and communicated to management, including our Chief Executive Officer and Chief Financial Officer, to allow for timely decisions regarding required disclosure.

Applicable SEC rules require an evaluation of the effectiveness of our DCP. Management, under the supervision and with the participation of our Chief Executive Officer and Chief Financial Officer, has evaluated the effectiveness of our DCP as of September 30, 2025, the end of the period covered by this report, and, based on such evaluation, our Chief Executive Officer and Chief Financial Officer have concluded that our DCP is effective.

Changes in Internal Control over Financial Reporting

We substantially completed the implementation of our new Enterprise Resource Planning (“ERP”) system during the quarter ended September 30, 2025. The implementation of our ERP system (i) resulted in changes to controls that are reliant upon system configurations, integrations and outputs, and (ii) is expected to, among other things, improve user access security and enable convergence of accounting, back office and reporting processes and activities. Except for the implementation of our new ERP system and corresponding changes to controls reliant upon system configurations, integrations and outputs, there was no change in our internal control over financial reporting that occurred during the third quarter of 2025 that materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

Certifications

The certifications of our Chief Executive Officer and Chief Financial Officer pursuant to Exchange Act Rules 13a-14(a) and 15d-14(a) are filed with this report as Exhibits 31.1 and 31.2. The certifications of our Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. 1350 are furnished with this report as Exhibits 32.1 and 32.2.