X0508 4 2023-09-28 0001581990 PLAINS GP HOLDINGS LP PAGP 0001421559 Chiang Willie CW 333 CLAY STREET SUITE 1600 HOUSTON TX 77002 1 1 0 0 Chairman & CEO 0 Class A Shares 2023-09-28 4 P 0 62000 16.237 A 318704 D Class A Shares 60000 I By Trust The price in column 4 reflects the weighted average price for the Class A shares. The shares were purchased in multiple transactions at prices ranging from $16.225 to $16.25. The reporting person will provide upon request by the SEC staff, the issuer or any security holder of the issuer full information regarding the number of shares purchased at each separate price. /s/ Richard McGee, as attorney-in-fact for Willie CW Chiang 2023-09-29