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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: September 17, 2025
(Date of earliest event reported)

IDEX CORPORATION
(Exact name of registrant as specified in its charter)

Delaware |  | 1-10235 |  | 36-3555336
(State or other jurisdiction |  | (Commission File Number) |  | (IRS Employer
of incorporation) |  |  |  | Identification No.)

3100 Sanders Road, Suite 301
Northbrook, Illinois 60062
(Address of principal executive offices, including zip code)
(847) 498-7070
(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:

☐ | Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ | Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ | Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ | Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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

Title of each class |  | Trading Symbol(s) |  | Name of each exchange on which registered
Common Stock, par value $.01 per share |  | IEX |  | New York Stock Exchange

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. ☐

Item 7.01 - Regulation FD Disclosure.
A copy of the press release relating to the matter described below is attached hereto as Exhibit 99.1 and is furnished herewith.
Item 8.01 - Results of Operations and Financial Condition.
On September 17, 2025, the Board of Directors of IDEX Corporation (the “Company”) authorized the repurchase of an additional $635 million of the Company’s common shares. The increased repurchase authorization, when added to the approximately $365 million that remained available from the previously approved repurchase authorizations, provides the Company with a total authorized repurchase availability of approximately $1 billion.
The repurchases will be made from time to time in either open market transactions or in privately negotiated transactions, and may also be made under 10b5-1 plans. The timing, volume and nature of share repurchases will be at the discretion of management, dependent on market conditions, other priorities of cash investment, applicable securities laws and other factors. This share repurchase program does not obligate the Company to acquire any particular amount of common stock, and it may be suspended or discontinued at any time.
Item 9.01 – Financial Statements and Exhibits.
(d) Exhibits
99.1 Press release dated September 18, 2025 announcing IDEX Corporation’s additional share repurchase authorization.
.
104.0 Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document.

SIGNATURE
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.

IDEX CORPORATION
| By: | /s/ AKHIL MAHENDRA
|  | Akhil Mahendra
|  | Interim Chief Financial Officer and Vice President, Corporate Development
September 18, 2025 |  |