X0508 4 2023-12-31 0000944480 GSE SYSTEMS INC GVP 0001735299 Khanna Ravi GSE SYSTEMS, INC. 6940 COLUMBIA GATEWAY DR STE 470 COLUMBIA MD 21046 true SVP Professional Services false Common Stock 2023-12-31 4 F 0 106 2.01 D 8113 D Shares withheld by the Issuer for payment of applicable taxes owed due to the vesting of 432 restricted share units pursuant to two restricted share unit agreements between the Reporting Person and the Issuer. All beneficially owned securities reflect the ten-for-one reverse stock split effected on October 30, 2023. /s/ Khanna Ravi 2024-01-03