Archer Aviation Inc. (ACHR) · Insider Trading (Form 4) SEC Filing

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-03-26 10b5-1 Pre-arranged Plan: Yes --- Issuer --- Name: Archer Aviation Inc. (ACHR) CIK: 0001824502 --- Reporting Owner --- Name: Lentell Eric CIK: 0002016416 Role: Officer (Chief Legal & Strategy Officer) --- Non-Derivative Transactions --- [Transaction #1] Security: Class A Common Stock Date: 2026-03-26 | Code: S (Open market sale) Shares: -50,000 | Price: $5.36 Total Value: $268,000.00 Shares Owned After: 100,119 | Ownership: D (Direct) Footnotes: [F1] The transaction was executed pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 3, 2025, as amended on December 23, 2025. [F2] This transaction was effected to offset certain tax liabilities and other related costs incurred by the reporting person in connection with the previous settlement of restricted stock units. [Transaction #2] Security: Class A Common Stock Date: 2026-03-27 | Code: S (Open market sale) Shares: -50,000 | Price: $5.30 Total Value: $265,000.00 Shares Owned After: 50,119 | Ownership: D (Direct) Footnotes: [F1] The transaction was executed pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 3, 2025, as amended on December 23, 2025. [F2] This transaction was effected to offset certain tax liabilities and other related costs incurred by the reporting person in connection with the previous settlement of restricted stock units. [F3] Following the reported transaction, in addition to the 50,119 shares of Class A Common Stock beneficially owned by the Reporting Person, the Reporting Person held restricted stock units representing contingent rights to receive up to an aggregate 548,955 shares of the Issuer's Class A Common Stock, which restricted stock units are subject to service-based vesting schedules and vest according to their respective terms. --- Footnotes (Complete Index) --- F1: The transaction was executed pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 3, 2025, as amended on December 23, 2025. F2: This transaction was effected to offset certain tax liabilities and other related costs incurred by the reporting person in connection with the previous settlement of restricted stock units. F3: Following the reported transaction, in addition to the 50,119 shares of Class A Common Stock beneficially owned by the Reporting Person, the Reporting Person held restricted stock units representing contingent rights to receive up to an aggregate 548,955 shares of the Issuer's Class A Common Stock, which restricted stock units are subject to service-based vesting schedules and vest according to their respective terms. --- Signature --- /s/ /s/ Eric Lentell (2026-03-31)