X0508 4 2024-03-04 0001201792 AMERICAN PUBLIC EDUCATION INC APEI 0001220428 SUNDERLAND RICHARD W JR 111 WEST CONGRESS STREET CHARLES TOWN WV 25414 0 1 0 0 EVP, Chief Financial Officer 0 Common Stock, par value $.01 2024-03-04 4 A 0 22486 0 A 163335 D Common Stock, par value $.01 2024-03-04 4 F 0 3374 11.52 D 159961 D Performance-based restricted stock unit ("PSU") award pursuant to the American Public Education, Inc. 2017 Omnibus Incentive Plan. Award reflects a level of achievement of adjusted EBITDA and revenue performance measures for the issuer's fiscal year ended December 31, 2023. Award vests in three approximately equal installments on March 4, 2024, February 7, 2025, and February 7, 2026. The issuer withheld shares of Common Stock from the reporting person to pay the tax withholding obligations related to the vesting of PSUs. /s/ Richard W. Sunderland, Jr., Attorney-in-Fact 2024-03-06