X0508 4 2026-03-13 0001824502 Archer Aviation Inc. ACHR 0001797669 Perkins Tosha C/O ARCHER AVIATION INC. 190 WEST TASMAN DRIVE SAN JOSE CA 95134 false true false false CHIEF ADMINISTRATIVE OFFICER 0 Class A Common Stock 2026-03-13 4 S 0 10949 6.2749 D 384768 D Represents shares of the issuer's Class A common stock sold to satisfy the reporting person's tax withholding obligations, which were incurred in connection with the vesting of the 2025 PRSU Award, which vesting was separately reported on a Form 4 filed with the U.S. Securities and Exchange Commission on March 12, 2026. In accordance with company policy, shares are automatically sold to cover such obligations. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.225 to $6.315 per share, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the U.S. Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. /s/ Eric Lentell, Attorney-in-Fact for Tosha Perkins 2026-03-16