X0508 4/A 2025-03-01 2025-03-04 0001824502 Archer Aviation Inc. ACHR 0002036956 Gupta Priya C/O ARCHER AVIATION INC. 190 WEST TASMAN DRIVE SAN JOSE CA 95134 false true false false Interim CFO 0 Class A Common Stock 2025-03-01 4 M 0 19484 0 A 133547 D Restricted Stock Units 2025-03-01 4 M 0 19484 0 D Class A Common Stock 19484 29228 D Includes 2,073 shares of Class A Common Stock acquired by the reporting person in one or more transactions with Issuer pursuant to its Employee Stock Purchase Plan, which transactions are exempt pursuant to Rules 16a3(f)(1)(i)(B) and 16b3(c). Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock, subject to the reporting person's continued status as a service provider to the Issuer. The award vested as to 1/4 of the total award on August 15, 2023. The award was originally scheduled to vest in ratable increments of 1/16 of the total award quarterly thereafter on each November 15th, March 1st, May 15th, and August 15th. The original vesting schedule was modified pursuant to approval of the Issuer's Compensation Committee, resulting in vesting of 1/8 of the total award on certain scheduled vesting dates, including on the transaction date. Pursuant to the modified vesting schedule, the award vested in full on August 15, 2025. These restricted stock units do not expire; they either vest or are cancelled prior to the vesting date. The Form 4 filed on March 4, 2025 is being amended hereby to correct, as set forth in Tables I and II above, the number of restricted stock units that vested on March 1, 2025 with respect to the single award reflected above. The number of restricted stock units that vested on such award was misstated in the original report due administrative error. For avoidance of doubt, after giving effect to all transactions originally reported on such Form 4, the reporting person directly held 127,463 shares of the Issuer's Class A Common Stock. Any subsequent Forms 4 filed by the reporting person through the date of this amendment should be read to incorporate this correction in the context of any transactions reported therein. /s/ Eric Lentell, Attorney-in-Fact for Priya Gupta 2025-11-18