[Form 3] COMPASS MINERALS INTERNATIONAL INC Initial Statement of Beneficial Ownership

Rhea-AI Filing Summary

Initial Form 3 filing for Compass Minerals International (CMP): An executive identified as Amy Tills (listed as Chief Human Resources Officer) reported an event dated 09/11/2025 and filed an initial Form 3 stating no securities are beneficially owned. The filing was signed by Deanne Larison, by power of attorney on 10/09/2025. This is an initial Section 16 disclosure showing the officer relationship but no direct or indirect ownership recorded on the form.

Positive

• Officer role disclosed (Chief Human Resources Officer), satisfying Section 16 initial reporting requirements
• Clear statement of no beneficial ownership, reducing immediate insider-trading disclosure complexity

Negative

• No equity ownership disclosed by the named officer, which may limit direct alignment with shareholders

Insights

Corporate Governance Analyst

Officer named with no reported equity holdings.

The filing indicates an officer-level relationship (Chief Human Resources Officer) with the issuer but explicitly states no securities are beneficially owned. This Form 3 documents the initial reporting obligation rather than a change in ownership.

Key dependencies include whether subsequent Forms 4 or 5 will report acquisitions or transfers. Investors or compliance teams may watch for any later filings showing grants, purchases, or option awards within the usual Section 16 reporting windows (within days of transaction).

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

Tills Amy

(Last) (First) (Middle)

C/O COMPASS MINERALS INTERNATIONAL, INC.

9900 W 109TH ST STE 100

(Street)

OVERLAND PARK KS 66210

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
09/11/2025

3. Issuer Name and Ticker or Trading Symbol
COMPASS MINERALS INTERNATIONAL INC [ CMP ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Human Resources Officer

5. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

Exhibit 24 - Power of Attorney

No securities are beneficially owned.

	/s/ Deanne Larison, by power of attorney	10/09/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What does Form 3 for CMP filed by Amy Tills indicate?

The Form 3 indicates Amy Tills is an officer (Chief Human Resources Officer) and the filing reports no securities are beneficially owned as of 09/11/2025.

Does the Form 3 show any stock or option holdings for the officer?

No. The filing explicitly states no securities are beneficially owned and lists no entries in the non-derivative or derivative tables.

Who signed the Form 3 and when was it signed?

The Form 3 was signed by Deanne Larison, by power of attorney on 10/09/2025.

Will this Form 3 show future equity awards or purchases?

Not by itself. Any future equity acquisitions or option grants would be reported on subsequent Form 4 filings when transactions occur.