X0508 4 2025-11-05 0002035149 Flowco Holdings Inc. FLOC 0002049797 Roberts Chad C/O FLOWCO HOLDINGS INC. 1300 POST OAK BLVD., SUITE 450 HOUSTON TX 77056 true EVP, Production Solutions true Class A Common Stock 2025-11-05 4 S 0 55173 18.2636 D 332327 D The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 14, 2025. The price reported is a weighted average price. These shares of Class A common stock were sold in multiple transactions at prices ranging from $18.05 to $18.62, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the Staff of the Securities and Exchange Commission, upon requests, full information regarding the number of shares of Class A common stock sold at each separate price within such range. /s/ Joel Lambert, attorney-in-fact 2025-11-07