UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 15 CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13 AND 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number: 333-42587 GARTNER, INC. SAVINGS AND INVESTMENT PLAN (F/K/A GARTNER GROUP, INC. SAVINGS AND INVESTMENT PLAN) -------------------------------------------------------------------------------- (Exact name of registrant as specified in its charter) P.O. Box 10212 56 Top Gallant Road Stamford, Connecticut 06904-2212 (203) 316-1111 -------------------------------------------------------------------------------- (Address, including zip code, and telephone number, including area code, of registrant's principal executive offices) Common Stock, $0.0005 par value and plan interests -------------------------------------------------------------------------------- (Title of each class of securities covered by this Form) N/A -------------------------------------------------------------------------------- (Titles of all other classes of securities for which a duty to file reports under section 13(a) or 15(d) remains) Please place an X in the box(es) to designate the appropriate rule provision(s) relied upon to terminate or suspend the duty to file reports: Rule 12g-4(a)(1)(i) [ ] Rule 12h-3(b)(1)(i) [X] Rule 12g-4(a)(1)(ii) [ ] Rule 12h-3(b)(1)(ii) [ ] Rule 12g-4(a)(2)(i) [ ] Rule 12h-3(b)(2)(i) [ ] Rule 12g-4(a)(2)(ii) [ ] Rule 12h-3(b)(2)(ii) [ ] Rule 15d-6 [ ] Approximate number of holders of record as of the certification or notice date: None Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has caused this certification and notice to be signed on its behalf by the undersigned duly authorized person. Date: June 7, 2006 By: /s/ Christopher Lafond --------------------------------- Christopher Lafond, Administrative Committee Chairman