GARTNER INC

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported)

July 30, 2026

GARTNER, INC.

(Exact name of registrant as specified in its charter)

P.O. Box 10212

56 Top Gallant Road

Stamford, CT 06902-7747

(Address of Principal Executive Offices, including Zip Code)

(203)964-0096

(Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter): Emerging Growth Company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act: ☐

On August 4, 2026, Gartner, Inc. (the “Company” or “Gartner”) announced financial results for the three months ended June 30, 2026. A copy of the Company’s Press Release is furnished herein as Exhibit 99.1.

In accordance with General Instruction B.2 of Form 8-K, the information in this Item 2.02 and in Exhibit 99.1 of this Current Report on Form 8-K shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liability of that section, and shall not be incorporated by reference into any registration statement or other document filed under the Securities Act of 1933, as amended (the “Securities Act”), or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Financial Results

Gartner has scheduled a webcast call at 8:00 a.m. Eastern time on Tuesday, August 4, 2026 to discuss the Company’s financial results for the second quarter of 2026. An earnings supplement will also be available via the Internet by accessing the Company’s website at https://investor.gartner.com. An audio replay of the webcast will also be available on the Company's website.

Share Repurchase Authorization

On July 30, 2026, the Company’s Board of Directors authorized incremental share repurchases of up to an additional $500.0 million of Gartner’s common stock. This authorization is in addition to the previously authorized repurchases of up to $8.1 billion, which, as of the end of July 2026, had approximately $640.0 million remaining.

Repurchases of common stock by the Company may be effected from time to time through open market purchases, trading plans established in accordance with the U.S. Securities and Exchange Commission’s rules, accelerated stock repurchases, private transactions or other means, depending on satisfactory market conditions, applicable legal requirements and other factors. The Company is not obligated to repurchase any particular amount of common stock, and share repurchases may be suspended at any time at the Company’s discretion.

In accordance with General Instruction B.2 of Form 8-K, the information in this Item 7.01 of this Current Report on Form 8-K shall not be deemed “filed” for purposes of Section 18 of the Exchange Act, or otherwise subject to the liability of that section, and shall not be incorporated by reference into any registration statement or other document filed under the Securities Act or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

(d) Exhibits

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.