Welcome to our dedicated page for Compass Minerals Intl SEC filings (Ticker: CMP), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
Compass Minerals International, Inc. filings document an operating company centered on salt and plant nutrition minerals. Form 8-K reports cover fiscal operating results, segment performance, Regulation FD disclosures, capital-structure actions such as senior note redemption notices, and other material events tied to the company's balance sheet and operations.
Proxy and annual meeting records describe director elections, advisory executive compensation votes, auditor ratification, board composition and committee assignments. The filing record also includes governance-related disclosures, stockholder derivative action settlement notices, and formal exhibits that record press releases, voting results and material corporate communications.
Compass Minerals International, Inc. (CMP) reported an insider equity award to its Chief Commercial Officer on a Form 4. On 11/24/2025, the officer received 17,576 restricted stock units, each representing a contingent right to receive one share of Compass Minerals common stock. These restricted stock units vest in three equal annual installments, starting on the first anniversary of the grant date and ending on November 24, 2028.
Following the reported transactions, the officer beneficially owns 13,213 shares of common stock directly and 249 shares indirectly through a 401(k) plan, with the 401(k) balance based on a statement dated as of October 15, 2025. The filing reflects routine equity-based compensation and updated beneficial ownership for a senior executive.
M Partners Fund LP, together with its general partner M Partners Fund (GP) LLC and managing member Ali John Mirshekari, reports beneficial ownership of 2,289,834 shares of Compass Minerals International, Inc. common stock. This represents 5.49% of Compass Minerals’ outstanding common shares, based on 41,688,657 shares outstanding as of August 7, 2025. All reported shares are held with shared voting and shared dispositive power, with no sole voting or dispositive authority. The reporting persons state that the shares were not acquired and are not held for the purpose of changing or influencing control of Compass Minerals and that they disclaim forming a statutory group under the Exchange Act.
State Street Corporation filed a Schedule 13G reporting beneficial ownership of 2,305,790 shares of Compass Minerals International, Inc. common stock, representing 5.5% of the class as of the reported event date.
The filing lists shared voting power over 2,198,364 shares and shared dispositive power over 2,305,790 shares, with no sole voting or dispositive power. The stake is held in the ordinary course of business and not for the purpose of changing or influencing control, per the certification.
State Street identifies affiliated advisers involved, including SSGA Funds Management, Inc. and other State Street Global Advisors entities.
The Vanguard Group filed an amended Schedule 13G (Amendment No. 17) reporting beneficial ownership of 2,775,116 shares of Compass Minerals International (CMP) common stock, representing 6.65% of the class as of 09/30/2025.
Vanguard reports 0 shares with sole voting power and 238,593 with shared voting power. It holds 2,499,342 shares with sole dispositive power and 275,774 with shared dispositive power. Vanguard certifies the securities were acquired and are held in the ordinary course of business and not to change or influence control. Vanguard’s clients have the right to receive dividends or sale proceeds for the reported securities, and no single client has an interest exceeding 5%.
Compass Minerals (CMP) reported insider activity by its Chief Commercial Officer. On 10/15/2025, 7,408 shares of common stock were acquired at $0 per share upon settlement of restricted stock units (code M). To cover taxes on the vesting, 2,176 shares were withheld at $19.53 (code F).
After these transactions, the officer directly owned 13,213 shares, plus 249 shares held indirectly in a 401(k) plan as of October 15, 2025. The Form 4 also reflects RSU settlements tied to prior grants: 464 and 855 shares vested with remaining RSU balances of 0 and 856, and 6,089 shares vested from a grant with 12,179 RSUs remaining, consistent with stated vesting schedules ending on October 15, 2025, 2026, and 2027.
Compass Minerals International (CMP) reported an insider equity transaction by its Chief Accounting Officer on 10/15/2025. The officer’s restricted stock units converted to 2,598 shares of common stock at $0 per share (Code M). To cover taxes upon vesting, 763 shares were withheld at $19.53 (Code F), leaving 1,835 shares directly owned after the transactions.
Each RSU equals one share of common stock, and the award vests in three equal annual installments from October 15, 2025 through October 15, 2027. Following these transactions, the reporting person holds 5,196 restricted stock units as derivative securities.
Compass Minerals International (CMP) reported insider equity activity by its President and CEO (also a director) on 10/15/2025. 45,467 restricted stock units converted into common stock (transaction code M) at $0, and 15,189 shares were withheld at $19.53 to satisfy taxes (code F). Following these transactions, the insider directly beneficially owns 50,789 common shares.
The filing also shows 90,933 restricted stock units beneficially owned after the event, vesting in three equal annual installments from October 15, 2025 to October 15, 2027, and 4,882 deferred stock units related to director service.
Compass Minerals International reported a grant of 14,595 restricted stock units (RSUs) to Amy Tills, the Chief Human Resources Officer, executed on 09/11/2025. Each RSU converts to one share of common stock, so the award represents the right to receive 14,595 shares when vested. The first tranche vests on the first anniversary of the grant date, and the remaining units vest equally on 09/11/2027. The reported grant price is $0, indicating these are standard time‑based awards rather than purchases. The Form 4 was filed by a named filing agent under power of attorney on 10/09/2025.
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.
Joyce Gareth T, a director of Compass Minerals International, Inc. (CMP), reported a grant of 1,433 common stock units on 09/30/2025 issued as director compensation. The units were granted at a $0 purchase price and increased her beneficial ownership to 29,812 shares. The Form 4 was filed with a power of attorney signature on 10/02/2025. The filing expressly states the units represent common stock units granted for her service as a director and includes an Exhibit 24 power of attorney.