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): March 520, 2026

Compass Minerals International, Inc.

(Exact name of registrant as specified in its charter)


Delaware	001-31921	36-3972986
(State or other jurisdiction of incorporation)	(Commission File Number)	(I.R.S. Employer Identification No.)

9900 West 109th Street

Suite 100

Overland Park, KS 66210

(Address of principal executive offices)

(913) 344-9200

(Registrant's telephone number, including area code)

N/A

(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 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

Name of each exchange on which registered

Common stock, $0.01 par value

CMP

The 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 58.~~07 Submission~~01 Other ~~of Matters to a Vote of Security Holders~~Events.

On March 520, 2026, Compass Minerals International, Inc. (“Compass Minerals”) delivered a notice of full redemption to Computershare Trust Company, N.A., as trustee (the “~~Company~~Trustee”), ~~held~~for its ~~2026~~outstanding ~~Annual~~6.750% ~~Meeting~~Senior ofNotes ~~Stockholders.~~due At2027 (the ~~Annual~~“2027 ~~Meeting~~Notes”), ~~the~~pursuant ~~Company’s~~to ~~stockholders~~the ~~voted~~indenture ongoverning the ~~following~~2027 ~~three~~Notes, ~~proposals~~dated ~~and~~as ~~cast~~of ~~their~~November ~~votes~~26, as2019 ~~described~~(the ~~below~~“Indenture”).

~~Proposal~~On 1March —20, ~~The~~2026, ~~individuals listed below were elected by~~ the ~~Company’s~~Trustee ~~stockholders~~provided tonotice ~~serve as directors~~ of ~~the~~redemption ~~Company~~to ~~until~~ the ~~next~~holders ~~annual meeting~~ of ~~stockholders,~~the or2027 ~~until~~Notes ain ~~successor~~accordance iswith ~~duly~~the ~~elected~~applicable ~~and~~procedures ~~qualified~~of orThe ~~his~~Depository orTrust ~~her earlier death, resignation or removal~~Company.

Director Nominee	For	Against	Abstain	Broker Non-Votes
Edward C. Dowling, Jr.	35,333,497	214,753	59,570	2,626,824
Russell Ball	34,298,245	1,300,339	9,236	2,626,824
Richard P. Dealy	34,599,651	951,314	56,855	2,626,824
Gareth T. Joyce	35,246,370	302,812	58,638	2,626,824
Denise Merle	33,813,272	1,786,030	8,518	2,626,824
Melissa M. Miller	32,889,655	2,660,544	57,621	2,626,824
Joseph E. Reece	34,652,574	947,406	7,840	2,626,824
Mark Roberts	35,476,006	124,248	7,566	2,626,824
David Safran	35,434,228	164,336	9,256	2,626,824

Compass Minerals has elected to redeem all $150,000,000 aggregate principal amount of the outstanding 2027 Notes. The 2027 Notes will be redeemed on March 30, 2026 (the “Redemption Date”) at a redemption price equal to 100.00% of the principal amount thereof, plus accrued and unpaid interest thereon to, but excluding, the Redemption Date, in accordance with the terms of the Indenture.

~~Proposal~~Item 27.01 Regulation —FD The Company’s stockholders approved, on a non-binding, advisory basis, the compensation of the Company’s named executive officers, as set forth in the Company’s Proxy Statement filed with the Securities Exchange Commission on January 23, 2026 (the “Proxy Statement”)Disclosure.

For						Against						Abstain						Broker Non-Votes
29,868,622						5,669,317						69,881						2,626,824

On March 24, 2026, the Company issued a press release announcing the redemption. The press release is attached as Exhibit 99.1 and is incorporated by reference.

~~Proposal~~The 3information —contained ~~The~~in ~~Company’s~~this ~~stockholders~~Item ~~ratified~~7.01 ~~the~~and ~~appointment~~Exhibit 99.1 is being furnished and shall not be deemed “filed” for purposes of ~~KPMG~~Section ~~LLP~~18 of the Securities Exchange Act of 1934, as amended (the ~~Company’s~~“Exchange ~~independent~~Act”), ~~registered~~or ~~public~~otherwise ~~accounting~~subject ~~firm~~to ~~for~~the ~~fiscal~~liabilities ~~2026~~of that section, or incorporated by reference in any filing under the Securities Act or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

For						Against						Abstain						Broker Non-Votes
38,136,077						73,743						24,824						—

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.


Exhibit No.						Exhibit Description
99.1						Press Release of Compass Minerals International, Inc., dated March 24, 2026.
104						Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURES

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

	COMPASS MINERALS INTERNATIONAL, INC.
Date: March 9, 2026	By:	/s/ Peter Fjellman
Date: March 24, 2026	By:	/s/ Peter Fjellman
		Peter Fjellman
		Name: Peter Fjellman
		Chief Financial Officer
		Title: Chief Financial Officer

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