Gartner (IT) 4: Rus Daniela L bought 507 shares of Common Stock at $N/A on… (Jun 1, 2026)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-05-28 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: GARTNER INC (IT) CIK: 0000749251 --- Reporting Owner --- Name: Rus Daniela L CIK: 0001966644 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-05-29 | Code: M (Exercise of derivative) Shares: +507 | Price: $0.00 Shares Owned After: 507 | Ownership: D (Direct) --- Derivative Transactions --- [Transaction #1] Security: Restricted Stock Units Date: 2026-05-28 | Code: A (Grant or award) Shares: +1,489 | Price: $0.00 Shares Owned After: 1,489 | Ownership: D (Direct) Footnotes: [F1] One hundred percent (100%) of the RSUs shall vest on May 28, 2027, subject to the Grantee's continued service as a director through such date. [F1] One hundred percent (100%) of the RSUs shall vest on May 28, 2027, subject to the Grantee's continued service as a director through such date. [Transaction #2] Security: Restricted Stock Units Date: 2026-05-29 | Code: M (Exercise of derivative) Shares: -507 | Price: $0.00 Shares Owned After: 0 | Ownership: D (Direct) Footnotes: [F2] One hundred percent (100%) of the RSUs vested on May 29, 2026. [F2] One hundred percent (100%) of the RSUs vested on May 29, 2026. --- Footnotes (Complete Index) --- F1: One hundred percent (100%) of the RSUs shall vest on May 28, 2027, subject to the Grantee's continued service as a director through such date. F2: One hundred percent (100%) of the RSUs vested on May 29, 2026. --- Signature --- /s/ /s/ Kevin Tang for Daniela L. Rus (2026-06-01)