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~~The ~~(Date~~Securities ofExchange ~~earliest~~Act ~~event~~of ~~reported): December 4, 2025~~ 1934

Date of Report (Date of earliest event reported): January 28, 2026

DONALDSON COMPANY, INC.

(Exact name of registrant as specified in its charter)

Delaware

1-7891

41-0222640

(State of

Incorporation)

(Commission

file number)

(I.R.S. Employer

Identification Number)

1400 West 94^th Street

Minneapolis, MN 55431

(Address of principal executive offices)

(952) 887-3131

(Registrant’s telephone number, including area code)

Not Applicable

(Former name or former address, if changed since last report)

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 communication 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, $5.00 par value

DCI

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 25.02. ~~Results~~Departure of ~~Operations~~Directors ~~and~~or ~~Financial~~Certain ~~Condition~~Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On ~~December~~January 429, ~~2025~~2026, Donaldson Company, Inc. (the “Company”) ~~issued~~announced athe ~~press~~appointment ~~release~~of ~~announcing~~Richard ~~its~~B. ~~results~~Lewis ofas ~~operations~~the ~~for~~Company’s President and Chief Executive Officer, effective March 2, 2026. Mr. Lewis was also appointed to the ~~quarter~~Board ~~ended~~of ~~October~~Directors, effective March 312, ~~2025~~2026. AMr. Lewis ~~copy~~succeeds Tod E. Carpenter who, on January 28, 2026, gave notice of his retirement as President and Chief Executive Officer, effective at the ~~press~~end ~~release~~of isthe ~~furnished~~day ~~herewith~~on March 1, 2026. Mr. Carpenter will continue as ~~Exhibit~~Executive 99Chairman of the Board to facilitate a smooth transition.1.

~~Item~~Mr. Lewis, 9age 54, currently serves as the Company’s Chief Operating Officer, a position he has held since August 1, 2025.01 Mr. Lewis ~~Financial~~joined ~~Statements~~the Company in 2002 and ~~Exhibits~~has held various positions, including President, Life Sciences; President, Mobile Solutions; Plant Manager; Director of Operations; General Manager, Liquid Filtration; General Manager, Operations; Vice President, Global Operations; and Senior Vice President, Global Operations.

99.1						Press Release dated December 4, 2025 announcing results of operations for the quarter ended October 31, 2025 of Donaldson Company, Inc.
104						Cover page interactive data file (formatted as inline XBRL).

In connection with his promotion to President and Chief Executive Officer, the Human Resources Committee of the Board approved an increase in his annual base salary to $1,088,000 and an increase to his annual cash incentive target as a percent of base salary to 110%, for the remainder of fiscal 2026. Mr. Lewis will also receive incremental equity awards with an aggregate grant date fair value equal to $942,500 (representing a pro-rated value of an annual award valued at $4,426,000 less the grant date of fair value of equity awards previously granted to Mr. Lewis for fiscal 2026), delivered 50% in the form of a performance stock unit for the 2026-2028 performance period and 50% in the form of a non-qualified stock option.

Mr. Carpenter’s annual base salary for the remainder of 2026 was reduced, effective March 2, 2026, to $880,000 for his continued service as Executive Chairman of the Board. His annual cash incentive target will remain 120% of his new annual base salary.

Item 7.01

Regulation FD Disclosure.

A copy of the press release announcing the CEO succession is being furnished herewith as Exhibit 99.1.

The information in the Exhibit attached hereto shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, nor shall it be deemed to be incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

Item 9.01

Financial Statements and Exhibits.

(d) Exhibits.


99.1		Press Release, dated January 29, 2026, announcing CEO succession.

104		Cover page interactive data file (formatted as inline XBRL)

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.

DONALDSON COMPANY, INC.

~~DONALDSON COMPANY, INC.~~

Date:

December 4, 2025

By:

/s/ Amy C. Becker

Date: January 29, 2026

By:

/s/ Amy C. Becker

Amy C. BeckerChief Legal Officer and Corporate Secretary

Amy C. Becker

Chief Legal Officer and Corporate Secretary

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