X0508 4 2026-03-05 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 2026-03-05 4 S 0 54786 6.4610 D 377022 D Represents shares of Class A Common Stock sold to satisfy tax withholding obligations incurred in connection with the vesting of restricted stock units, which vesting was separately reported on a Form 4 filed with the U.S. Securities and Exchange Commission on March 3, 2026. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.315 to $6.775 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. For clarity, the total reported in Table I after giving effect to the reported transaction has been corrected to reflect one additional share not included in the reporting person's previous Form 4 filed on March 3, 2026, due to administrative error. /s/ Eric Lentell, Attorney-in-Fact for Tosha Perkins 2026-03-09