Align Technology (ALGN)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-05-20 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: ALIGN TECHNOLOGY INC (ALGN) CIK: 0001097149 --- Reporting Owner --- Name: Saia Andrea Lynn CIK: 0001552993 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-05-20 | Code: M (Exercise of derivative) Shares: +1,745 | Price: $0.00 Shares Owned After: 17,318 | Ownership: D (Direct) --- Derivative Transactions --- [Transaction #1] Security: Restricted Stock Units Date: 2026-05-20 | Code: M (Exercise of derivative) Shares: -1,745 | Price: $0.00 Shares Owned After: 0 | Ownership: D (Direct) Footnotes: [F1] 100% of the restricted stock units ("RSUs") granted on May 21, 2025 vested on May 20, 2026 and shares were delivered to the Reporting Person. [F1] 100% of the restricted stock units ("RSUs") granted on May 21, 2025 vested on May 20, 2026 and shares were delivered to the Reporting Person. [F1] 100% of the restricted stock units ("RSUs") granted on May 21, 2025 vested on May 20, 2026 and shares were delivered to the Reporting Person. [Transaction #2] Security: Restricted Stock Units Date: 2026-05-20 | Code: A (Grant or award) Shares: +1,836 | Price: $0.00 Shares Owned After: 1,836 | Ownership: D (Direct) Footnotes: [F2] 100% of the RSUs granted on May 20, 2026 will become vested on the earlier of (i) May 20, 2027 or (ii) the date of the next annual meeting of stockholders. Shares will be delivered to the Reporting Person on such vesting date assuming the continued service of the Reporting Person on such vesting date. [F2] 100% of the RSUs granted on May 20, 2026 will become vested on the earlier of (i) May 20, 2027 or (ii) the date of the next annual meeting of stockholders. Shares will be delivered to the Reporting Person on such vesting date assuming the continued service of the Reporting Person on such vesting date. [F2] 100% of the RSUs granted on May 20, 2026 will become vested on the earlier of (i) May 20, 2027 or (ii) the date of the next annual meeting of stockholders. Shares will be delivered to the Reporting Person on such vesting date assuming the continued service of the Reporting Person on such vesting date. --- Footnotes (Complete Index) --- F1: 100% of the restricted stock units ("RSUs") granted on May 21, 2025 vested on May 20, 2026 and shares were delivered to the Reporting Person. F2: 100% of the RSUs granted on May 20, 2026 will become vested on the earlier of (i) May 20, 2027 or (ii) the date of the next annual meeting of stockholders. Shares will be delivered to the Reporting Person on such vesting date assuming the continued service of the Reporting Person on such vesting date. --- Signature --- /s/ /s/ Julie Ann Coletti, Attorney-in-Fact for Andrea Lynn Saia (2026-05-22)