Align Technology (ALGN)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-08-27 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: ALIGN TECHNOLOGY INC (ALGN) CIK: 0001097149 --- Reporting Owner --- Name: Blackford Quentin S. CIK: 0001612451 Role: Director --- Derivative Transactions --- [Transaction #1] Security: Restricted Stock Units Date: 2026-08-27 | Code: A (Grant or award) Shares: +1,376 | Price: $0.00 Shares Owned After: 1,376 | Ownership: D (Direct) Footnotes: [F1] 100% of the RSUs granted on August 27, 2026 will become vested on 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. [F1] 100% of the RSUs granted on August 27, 2026 will become vested on 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. [F1] 100% of the RSUs granted on August 27, 2026 will become vested on 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 RSUs granted on August 27, 2026 will become vested on 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/ Paul Katawicz, Attorney-in-Fact for Quentin S. Blackford (2026-08-31)