X0508 4 2025-05-14 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 2025-05-14 4 S 0 2133 26.9979 D 187403 D Common Stock, par value $.01 2025-05-14 4 S 0 4155 27.4697 D 183248 D Common Stock, par value $.01 2025-05-15 4 S 0 5924 27.3985 D 177324 D Common Stock, par value $.01 2025-05-15 4 S 0 20 27.9285 D 177304 D The price of $26.9979 per share represents a weighted average of sale prices ranging from $26.25 to $27.23 per share. The reporting person undertakes to provide upon request by the Commission staff, the issuer, or a security holder of the issuer full information regarding the number of shares sold at each separate price. The price of $27.4697 per share represents a weighted average of sale prices ranging from $27.25 to $27.88 per share. The reporting person undertakes to provide upon request by the Commission staff, the issuer, or a security holder of the issuer full information regarding the number of shares sold at each separate price. The price of $27.3985 per share represents a weighted average of sale prices ranging from $26.88 to $27.875 per share. The reporting person undertakes to provide upon request by the Commission staff, the issuer, or a security holder of the issuer full information regarding the number of shares sold at each separate price. The price of $27.9285 per share represents a weighted average of sale prices ranging from $27.91 to $27.965 per share. The reporting person undertakes to provide upon request by the Commission staff, the issuer, or a security holder of the issuer full information regarding the number of shares sold at each separate price. /s/ Richard W. Sunderland, Jr. 2025-05-16