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: 2026-04-20 10b5-1 Pre-arranged Plan: No --- 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: 2026-04-20 | Code: A (Grant or award) Shares: +78,659 | Price: $0.00 Shares Owned After: 128,778 | Ownership: D (Direct) Footnotes: [F1] The reported transaction represents the vesting of the second of three tranches of a March 26, 2024 performance-based restricted stock unit award granted to the reporting person by the Issuer's compensation committee, which vests based on the achievement of a relative total stockholder return over a defined performance period (the "2024 Performance Award") and is subject to the reporting person's continued service through the vesting date. [F2] On April 20, 2026 (the "Certification Date"), the Issuer's compensation committee certified achievement of the vesting criteria of the second tranche of the 2024 Performance Award, resulting in one-third of the 2024 Performance Award vesting at 164.87% of the target amount granted for the two-year performance period beginning on March 26, 2024 and ending on March 26, 2026. The performance restricted stock units comprising the second tranche of the 2024 Performance Award will be settled for shares of the Issuer's Class A common stock shortly following the Certification Date. --- Footnotes (Complete Index) --- F1: The reported transaction represents the vesting of the second of three tranches of a March 26, 2024 performance-based restricted stock unit award granted to the reporting person by the Issuer's compensation committee, which vests based on the achievement of a relative total stockholder return over a defined performance period (the "2024 Performance Award") and is subject to the reporting person's continued service through the vesting date. F2: On April 20, 2026 (the "Certification Date"), the Issuer's compensation committee certified achievement of the vesting criteria of the second tranche of the 2024 Performance Award, resulting in one-third of the 2024 Performance Award vesting at 164.87% of the target amount granted for the two-year performance period beginning on March 26, 2024 and ending on March 26, 2026. The performance restricted stock units comprising the second tranche of the 2024 Performance Award will be settled for shares of the Issuer's Class A common stock shortly following the Certification Date. --- Signature --- /s/ /s/ Eric Lentell (2026-04-22)