X0306 4 2021-06-11 0001744494 ADVENT TECHNOLOGIES HOLDINGS, INC. ADN 0001843793 Gregoriou Vassilios C/O ADVENT TECHNOLOGIES HOLDINGS, INC. 200 CLARENDON STREET BOSTON MA 02116 true true Chairman and CEO Common Stock 2021-06-11 2021-02-04 4 A 0 922118 0 A 6387624 D Stock Options 10.36 2021-06-11 2021-02-04 4 A 0 922118 0 A 2022-02-04 2031-06-11 Common Stock 922118 922118 D Represents 922,118 restricted stock units that is a contingent right to receive common stock upon vesting granted pursuant to the Advent Technologies Holdings, Inc. 2021 Equity Incentive Plan, dated as of February 4, 2021. The restricted stock units will vest 25% upon each anniversary of February 4, 2021, the vesting commencement date, until the fourth anniversary of the vesting commencement date. Received pursuant to the Advent Technologies Holdings, Inc. 2021 Equity Incentive Plan, dated as of February 4, 2021. The options will vest 25% upon each anniversary of February 4, 2021, the vesting commencement date, until the fourth anniversary of the vesting commencement date. Exhibit 24 - Power of Attorney By: /s/ Vassilios Gregoriou 2021-06-15