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: 2026-06-26 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: Archer Aviation Inc. (ACHR) CIK: 0001824502 --- Reporting Owner --- Name: Diaz Deborah CIK: 0001828079 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Class A Common Stock Date: 2026-06-26 | Code: M (Exercise of derivative) Shares: +19,102 | Price: $0.00 Shares Owned After: 172,632 | Ownership: D (Direct) --- Derivative Transactions --- [Transaction #1] Security: Restricted Stock Units Date: 2026-06-26 | Code: M (Exercise of derivative) Shares: -19,102 | Price: $0.00 Shares Owned After: 0 | Ownership: D (Direct) Footnotes: [F1] 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 service to the Issuer on the applicable vesting date. [F2] The entire award vested or vests on the earlier of the: (i) one year anniversary of the grant date or (ii) date of the Issuer's 2026 annual stockholders' meeting. [F3] These restricted stock units do not expire; they either vest or are cancelled prior to the vesting date. [Transaction #2] Security: Restricted Stock Units Date: 2026-06-26 | Code: A (Grant or award) Shares: +40,983 | Price: $0.00 Shares Owned After: 40,983 | Ownership: D (Direct) Footnotes: [F1] 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 service to the Issuer on the applicable vesting date. [F4] The entire award will vest on the earlier of the: (i) one year anniversary of the grant date or (ii) date of the Issuer's 2027 annual stockholders' meeting. [F3] These restricted stock units do not expire; they either vest or are cancelled prior to the vesting date. --- Footnotes (Complete Index) --- F1: 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 service to the Issuer on the applicable vesting date. F2: The entire award vested or vests on the earlier of the: (i) one year anniversary of the grant date or (ii) date of the Issuer's 2026 annual stockholders' meeting. F3: These restricted stock units do not expire; they either vest or are cancelled prior to the vesting date. F4: The entire award will vest on the earlier of the: (i) one year anniversary of the grant date or (ii) date of the Issuer's 2027 annual stockholders' meeting. --- Signature --- /s/ /s/ Eric Lentell, Attorney-in-Fact for Deborah Diaz (2026-06-30)