X0306 4 2022-08-31 0 0001744494 ADVENT TECHNOLOGIES HOLDINGS, INC. ADN 0001941444 GOURDOUPI PANORAIA 200 CLARENDON STREET 25TH FLOOR BOSTON MA 02116 1 0 0 0 Common Stock 2022-08-31 4 F 0 4688 0.00 D 374797 D Forfeiture of shares upon vesting of restricted stock units ("RSUs") on August 31, 2022. The RSUs were granted August 31, 2021, pursuant to Issuer's 2021 Equity Incentive Plan, dated February 4, 2021. Such RSUs are a common stock equivalent that may be settled solely by delivery of an equal number of shares of Issuer's common stock. Represents shares that have been withheld by the Issuer to satisfy income tax and withholding and remittance obligations in connection with the net settlement of RSUs and does not represent a sale by the Reporting Person. /s/ Panoraia Gourdoupi 2022-09-01