X0306 4 2021-01-20 0 0001591587 AssetMark Financial Holdings, Inc. AMK 0001782589 Zyla Gary G. C/O ASSETMARK FINANCIAL HOLDINGS, INC. 1655 GRANT STREET, 10TH FLOOR CONCORD CA 94520 0 1 0 0 EVP, Chief Financial Officer Common Stock 2021-01-20 4 S 0 2756 25.01 D 167541 D These transactions were executed in multiple trades at prices ranging from $25.00 to $25.02. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. All transactions were executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person. /s/ Sarah Tian, as Attorney-in-Fact, for Gary G. Zyla 2021-01-20