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Compass Minerals International, Inc. Form 4 Filings

CMP NYSE

Every Form 4 that Compass Minerals International, Inc. (CMP) has filed with the SEC in the last 12 months is listed below, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.

A Form 4 covers the transactions officers, directors and large holders report, so if you follow CMP and want that one kind of document rather than the whole filing history, this is the page to keep. The company's other filings, of every form, are on the full CMP filings page.

Rhea-AI Summary

COMPASS MINERALS INTERNATIONAL INC (CMP) reported that Chief Human Resources Officer Amy Tills exercised and converted 7,298 restricted stock units into an equal number of shares of common stock on September 11, 2026. In connection with this vesting, 2,142 shares of common stock were withheld to satisfy tax withholding obligations, rather than sold in the open market. The filing notes that each restricted stock unit represents a contingent right to receive one share of common stock and that the remaining tranche of this award will continue to vest equally on September 11, 2027. No Rule 10b5-1 trading plan is reported.

Rhea-AI Summary

Ashley Ward, Chief Accounting Officer of Compass Minerals International, reported vesting and settlement of 8,333 restricted stock units into an equal number of shares of common stock on July 28, 2026. The RSU award was fully settled, leaving 0 derivative units outstanding.

To satisfy related tax obligations, 2,443 shares of common stock were withheld at $29.69 per share. The Rule 10b5-1 checkbox is not marked, so these transactions are reported as not executed under a trading plan.

Rhea-AI Summary

Reece Joseph E reported acquisition or exercise transactions in this Form 4 filing.

Compass Minerals International director Joseph E. Reece reported a new equity grant rather than an open-market trade. He received 1,205 deferred stock units of common stock as a grant in connection with his service as a director, at a stated price of $0.00 per share.

After this award, Reece holds 95,670 shares of common stock directly and 21,000 shares indirectly through a trust. This filing reflects routine, compensation-related share issuance and does not record any market purchases or sales.

Rhea-AI Summary

DEALY RICHARD P reported acquisition or exercise transactions in this Form 4 filing.

COMPASS MINERALS INTERNATIONAL INC director Richard P. Dealy received a grant of 944 common stock units as compensation for his board service. The award carried a price of $0.00 per share, indicating it was a non-cash equity grant. Following this grant, he directly holds 45,760 shares of common stock.

Rhea-AI Summary

Safran David reported acquisition or exercise transactions in this Form 4 filing.

Compass Minerals International director David Safran reported a compensation-related award of 804 shares of common stock. The grant carried no cash purchase price and was made in connection with his service as a director. Following this award, he directly holds a total of 2,056 common shares.

Rhea-AI Summary

Compass Minerals International Chief Commercial Officer Benjamin S. Nichols reported routine equity compensation activity involving restricted stock units and related tax withholding. He exercised derivative rights to receive 2,542 shares of common stock, while 747 shares were withheld at a price of $28.66 per share to satisfy tax obligations tied to vesting.

Following these transactions, Nichols directly holds 15,988 shares of common stock and indirectly holds 249 shares through a 401(k) plan based on a statement dated as of October 31, 2025. He also has 2,542 restricted stock units outstanding, each representing a contingent right to one share of common stock, which vest in two equal annual installments beginning on June 24, 2026 and ending on June 24, 2027.

Rhea-AI Summary

Compass Minerals International Chief Commercial Officer Benjamin S. Nichols reported routine equity compensation activity involving restricted stock units. On May 18, 2026, 685 restricted stock units converted into 685 shares of common stock, reflecting vesting of prior awards.

Of these, 195 shares were withheld to cover tax withholding obligations at a price of $28.97 per share, with no open-market sale. Following these transactions, Nichols holds 14,193 shares of common stock directly and 249 shares indirectly through a 401(k) plan.

Rhea-AI Summary

Compass Minerals International chief commercial officer Benjamin S. Nichols reported routine equity compensation activity involving restricted stock units and related tax withholding. On May 13, 2026, 737 restricted stock units were converted into 737 shares of common stock at a conversion price of $0.0000 per share. Of these, 247 shares were withheld at $30.2100 per share to satisfy tax withholding obligations tied to the RSU vesting. After these transactions, Nichols held 13,703 shares of common stock directly, plus 249 shares indirectly through a 401(k) plan based on a statement dated as of October 31, 2025. He also reported 1,473 restricted stock units outstanding, which vest in three equal installments ending on May 13, 2028.

Rhea-AI Summary

COMPASS MINERALS INTERNATIONAL INC director Reece Joseph E received an equity award rather than buying shares on the market. On March 31, 2026, he was granted 1,816 shares of Common Stock at $0.00 per share, described as deferred stock units granted for his service as a director.

After this grant, he directly holds 94,465 shares of Common Stock. He also has an additional 21,000 shares reported as indirectly owned through a trust. The filing shows no stock sales or option exercises, only this compensation-related share award and a holding entry for the trust position.

Rhea-AI Summary

DEALY RICHARD P reported acquisition or exercise transactions in this Form 4 filing.

COMPASS MINERALS INTERNATIONAL INC director Richard P. Dealy received a grant of 1,259 shares of Common Stock on March 31, 2026.

The award was issued at no cash cost per share and is described as common stock units granted in connection with his service as a director, bringing his direct holdings to 44,816 shares.

Rhea-AI Summary

Safran David reported acquisition or exercise transactions in this Form 4 filing.

COMPASS MINERALS INTERNATIONAL INC director David Safran received a grant of 1,071 shares of common stock on March 31, 2026. The shares were awarded as common stock units in connection with his service as a director and carried a price of $0.00 per share. Following this grant, Safran directly holds a total of 1,252 shares of common stock.

Rhea-AI Summary

Compass Minerals International director Richard P. Dealy reported equity award and related share activity. On March 5, 2026, he exercised 11,905 Restricted Stock Units into the same number of shares of common stock at a stated price of $0.00 per share, resulting in 43,557 shares of common stock held directly after the transaction.

On the same date, he also received an annual grant of 5,032 Restricted Stock Units, held directly. According to the filing, this annual RSU grant will vest on the earlier of the day immediately preceding the company’s next annual meeting (if held at least 50 weeks from the grant date) or the first anniversary of the grant date.

Rhea-AI Summary

COMPASS MINERALS INTERNATIONAL INC director Lori A. Walker reported equity compensation-related transactions, not open-market trades. On March 5, 2026, she exercised 11,905 restricted stock units at $0.00 per unit, converting them into the issuer’s common stock held indirectly through the Walker Joint Revocable Trust, which then held 58,715 shares.

On the same date, 990 deferred stock units were distributed to her in the form of common stock, and her ownership records were adjusted accordingly. A separate footnote explains this represents an annual grant of restricted stock units that vest in one year in connection with her service as a director.

Rhea-AI Summary

Compass Minerals International director Joseph E. Reece reported equity compensation-related transactions on March 5, 2026. He exercised 22,322 deferred stock units into common stock at $0.00 per share and received a new grant of 9,434 deferred stock units for board service.

After these transactions, he directly held 92,649 shares of common stock and 9,434 deferred stock units21,000 common shares held indirectly by a trust. All reported movements reflect awards, conversions, or holdings rather than open-market buying or selling.

Rhea-AI Summary

Ball Russell David reported acquisition or exercise transactions in this Form 4 filing.

COMPASS MINERALS INTERNATIONAL INC director Russell David Ball received an annual equity grant in the form of restricted stock units. On March 5, 2026, he was granted 5,032 Restricted Stock Units at a price of $0.00 per unit, reflecting a non-cash award for his board service.

The footnote explains that these RSUs will vest on the earlier of the day immediately before the company’s next annual meeting (if held at least 50 weeks from the grant date) or the first anniversary of the grant date. After this filing, Ball also held 186 shares of Common Stock directly.

Rhea-AI Summary

Safran David reported acquisition or exercise transactions in this Form 4 filing.

Compass Minerals International director David Safran received an equity award in the form of restricted stock units. On the reported grant date, he was awarded 5,032 restricted stock units as an annual grant for his service as a director, with no cash price per unit.

The units will vest on the earlier of the day immediately preceding the company’s next annual meeting (if held at least 50 weeks after the grant date) or the first anniversary of the grant date. Following this filing, he also directly holds 181 shares of Compass Minerals common stock.

Rhea-AI Summary

Roberts Mark Lawrence reported acquisition or exercise transactions in this Form 4 filing.

Compass Minerals International director Mark Lawrence Roberts received an annual equity grant in the form of restricted stock units. He was awarded 5,032 restricted stock units on March 5, 2026, at no cash cost. According to the grant terms, these units will vest on the earlier of the day immediately preceding the company’s next annual meeting, if that meeting occurs at least 50 weeks after the grant date, or the first anniversary of the grant date. Following this grant, he directly holds 5,032 restricted stock units and 196 shares of common stock.

Rhea-AI Summary

Merle Denise M reported acquisition or exercise transactions in this Form 4 filing.

Compass Minerals International director Denise M. Merle reported receiving an annual equity award in the form of 5,032 restricted stock units on March 5, 2026. These RSUs were granted for her service as a director and will vest on the earlier of the day immediately preceding the company’s next annual meeting (if held at least 50 weeks after the grant) or the first anniversary of the grant date. Following this award, she also reported holding 220 shares of common stock directly.

Rhea-AI Summary

Compass Minerals International director Gareth T. Joyce reported equity awards and an exercise of restricted stock units. On the reported date, 11,905 restricted stock units were exercised into 11,905 shares of common stock at a stated price of $0.00 per share.

Joyce also received an annual grant of 5,032 restricted stock units in connection with service as a director. These units will vest on the earlier of the day immediately preceding the company’s next annual meeting, if held at least 50 weeks from the grant date, or the first anniversary of the grant date. Following these transactions, Joyce directly held 43,118 shares of common stock and 5,032 restricted stock units.

Rhea-AI Summary

COMPASS MINERALS INTERNATIONAL INC director Melissa M. Miller reported equity-based compensation activity. She exercised 11,905 Restricted Stock Units into 11,905 shares of common stock at a stated price of $0.0000 per share and now holds 43,152 common shares directly.

She also received a new grant of 5,032 Restricted Stock Units, bringing her directly held RSUs to 5,032. According to the footnote, this annual RSU grant for director service will vest on the earlier of the day immediately preceding the issuer's next annual meeting (if held at least 50 weeks from the grant date) or the first anniversary of the grant date.

Rhea-AI Summary

Compass Minerals International Chief Operations Officer Patrick James Merrin reported equity award activity. On March 3, 2026, restricted stock units converted into 18,525 shares of common stock. In connection with this vesting, 5,003 shares were withheld at $24.68 per share to cover tax obligations, leaving 13,522 shares of common stock held directly.

Each restricted stock unit represents the right to receive one share of common stock. The units vest in scheduled annual installments through March 3, 2027 and March 3, 2028, reflecting ongoing multi‑year compensation for the executive.

Rhea-AI Summary

Compass Minerals International director David Safran received new equity awards. On December 18, 2025, he was granted 1,348 restricted stock units tied to Compass Minerals common stock at a price of $0 per unit. These RSUs are scheduled to vest on the first anniversary of the grant date.

On December 31, 2025, Safran also acquired 181 common stock units at $0 per share, described as stock units granted in connection with his service as a director. Following these transactions, he directly held 181 common shares and 1,348 restricted stock units.

Rhea-AI Summary

Compass Minerals International director Mark Lawrence Roberts reported stock-based compensation for his board service. On December 31, 2025, he received 196 shares of common stock at $0 per share, leaving him with 196 directly owned common shares. On December 18, 2025, he was granted 1,348 restricted stock units at $0, which are scheduled to vest on December 18, 2026, reflecting his annual equity award as a director.

Rhea-AI Summary

Compass Minerals International Chief Financial Officer Peter Fjellman reported equity compensation activity involving company stock. On January 28, 2026, 8,321 restricted stock units converted into an equal number of Compass Minerals common shares at an exercise price of $0. To cover tax withholding obligations tied to this vesting, 2,720 common shares were withheld at a price of $25.90 per share, as noted in the footnotes. Following these transactions, Fjellman directly owned 5,601 shares of common stock and 16,641 restricted stock units, which represent rights to receive the same number of shares as they vest through January 28, 2028.

Rhea-AI Summary

Compass Minerals International director Merle Denise M reported equity awards tied to her board service. On December 18, 2025, she received 1,348 restricted stock units at $0 per unit. These RSUs are described as the annual grant for her role as a director and are scheduled to vest on the first anniversary of the grant date. On December 31, 2025, she also acquired 220 common stock units at $0 per share, reflecting additional stock-based compensation for director service. Following these transactions, she directly holds 1,348 RSUs and 220 common shares-related units.

Rhea-AI Summary

Compass Minerals International President and CEO Edward C. Dowling reported equity award activity involving the company’s common stock. On January 18, 2026, 22,350 restricted stock units were converted into the same number of shares of common stock at an exercise price of $0, increasing his directly held common shares to 73,139.

On the same date, 6,878 shares of common stock were withheld at a price of $23.29 to satisfy tax withholding obligations tied to the vesting and release of these restricted stock units, leaving 66,261 common shares held directly afterward. The filing also shows 4,882 deferred stock units credited in connection with his service as a director. Each restricted stock unit represents a right to receive one share of common stock and vests in three equal installments from January 18, 2025 through January 18, 2027.

Rhea-AI Summary

Compass Minerals International reported new equity awards to one of its directors. The director received 186 shares of common stock effective 12/31/2025 at a stated price of $0, increasing their directly held common shares to 186.

The director was also granted 1,348 restricted stock units on 12/18/2025 at an exercise price of $0. These restricted stock units relate to an annual equity grant for serving as a director and are scheduled to vest on 12/18/2026, the first anniversary of the grant date. After this grant, the director directly holds 1,348 restricted stock units tied to Compass Minerals common stock.

Rhea-AI Summary

Compass Minerals International director reports stock grant and updated holdings. A director of Compass Minerals International received 1,528 shares of common stock on 12/31/2025, reported as an acquisition at a price of $0. These shares represent common stock units granted in connection with the director’s service on the board.

Following this transaction, the director beneficially owns 45,820 shares indirectly through the Walker Joint Revocable Trust and 990 shares directly. The filing also notes that on 01/02/2026, an additional 2,063 deferred stock units were distributed to the director in the form of common stock, and the reported ownership has been adjusted to reflect this distribution. The director’s deferred stock units are granted as part of compensation for board service.

Rhea-AI Summary

Compass Minerals International director reports stock-based grant and updated holdings. A company director received 2,260 shares of Compass Minerals International, Inc. common stock on 12/31/2025, recorded as an acquisition at a price of $0, reflecting a deferred stock unit grant for board service. After this transaction, the director beneficially owns 70,327 shares directly and 21,000 shares indirectly through a trust.

Rhea-AI Summary

Compass Minerals International director reported receiving additional company stock as part of board compensation. On 12/31/2025, the reporting person acquired 1,401 shares of common stock at a price of $0, described as common stock units granted in connection with service as a director. After this grant, the director beneficially owns 31,213 shares in direct ownership form. This filing reflects routine equity compensation for board service rather than an open‑market purchase or sale.

Rhea-AI Summary

Compass Minerals International disclosed that one of its directors received a new equity grant. On 12/31/2025, the director was granted 1,496 shares of common stock at a stated price of $0, described as common stock units granted in connection with the director’s service.

After this grant, the director beneficially owned 31,652 shares of Compass Minerals common stock in direct ownership. This filing is a routine Form 4 reporting director compensation in the form of company equity.

Rhea-AI Summary

Compass Minerals International director reported a routine equity grant. On 12/31/2025, the director received 1,433 shares of common stock, recorded at a price of $0, reflecting stock units granted for board service.

After this transaction, the director beneficially owns 31,247 Compass Minerals common shares, held directly. The filing reports an acquisition rather than a sale, indicating additional equity-based compensation tied to the director role.

Rhea-AI Summary

Compass Minerals International, Inc. (CMP) reported an equity compensation grant to its Chief Human Resources Officer. On 11/24/2025, the officer received 8,979 restricted stock units (RSUs), each representing the right to receive one share of Compass Minerals common stock. These RSUs vest in three equal annual installments, starting on the first anniversary of the grant date and ending on November 24, 2028. The RSUs were reported as held directly by the officer and have an exercise price of $0, reflecting that they are share-based awards rather than options requiring a purchase price.

Rhea-AI Summary

Compass Minerals International (CMP) reported an insider equity grant for its Chief Accounting Officer. On November 24, 2025, the officer received 6,959 restricted stock units (RSUs), each representing the right to receive one share of Compass Minerals common stock. The RSUs have an exercise price of $0, meaning no cash payment is required when they convert into shares.

The RSUs vest in three equal installments, beginning on the first anniversary of the grant date and ending on November 24, 2028. After this grant, the officer holds 6,959 derivative securities (RSUs) and 1,835 shares of common stock directly. This is a routine Form 4 reporting an equity-based compensation award to a company officer.

Rhea-AI Summary

Compass Minerals International (CMP) reported an equity award to its Chief Financial Officer on a Form 4. On 11/24/2025, the CFO received 25,043 restricted stock units (RSUs), each representing a contingent right to receive one share of Compass Minerals common stock. The RSUs carry an exercise price of $0 and are held as direct ownership.

The RSUs vest in three equal annual installments, starting on the first anniversary of the grant date and ending on 11/24/2028. This grant increases the CFO’s equity-based stake in the company and aligns compensation with future company performance through time-based vesting.

Rhea-AI Summary

Compass Minerals International (CMP) reported an equity award to a senior executive. Chief Operations Officer Jared Campbell received 32,268 restricted stock units (RSUs) on 11/24/2025. Each RSU gives him the right to receive one share of Compass Minerals common stock if the award vests.

The RSUs vest in three equal annual installments, starting on the first anniversary of the grant date and ending on November 24, 2028. This award increases Campbell’s potential ownership in the company over time, aligning part of his compensation with the long-term performance of Compass Minerals’ stock.

Rhea-AI Summary

Compass Minerals International (CMP) reported an insider equity update for its President, CEO and director. On 11/24/2025, the executive disposed of 4,882 shares of common stock, leaving 50,789 shares of common stock held directly afterward.

The same day, the executive received a grant of 98,205 restricted stock units (RSUs), each representing the right to receive one share of CMP common stock. These RSUs vest in three equal annual installments, beginning on the first anniversary of the grant date and ending on November 24, 2028.

Rhea-AI Summary

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.

Rhea-AI Summary

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.

Rhea-AI Summary

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.

Rhea-AI Summary

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.

Rhea-AI Summary

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.

Rhea-AI Summary

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.

Rhea-AI Summary

Compass Minerals (CMP) director Reece Joseph E received 2,312 deferred stock units on 09/30/2025 at no cash price as compensation for board service, increasing his direct beneficial ownership to 68,067 shares. The filing also shows an indirect holding of 21,000 shares held by a trust. The transaction was reported on Form 4 and signed by an attorney-in-fact on 10/02/2025. The filer notes the units represent deferred stock units granted in connection with director service.

Rhea-AI Summary

Melissa M. Miller, a director of Compass Minerals International, was granted 1,465 common stock units on 09/30/2025 as compensation for board service. The transaction was recorded on a Form 4 filed under the issuer ticker CMP. The grant had a reported price of $0, consistent with issuance of stock units rather than a cash purchase, and increased the reporting person’s total beneficial ownership to 29,814 shares. The Form 4 was signed by a power of attorney on 10/02/2025 and includes an explanation that the units were granted in connection with director service.

Rhea-AI Summary

Compass Minerals (CMP) director Lori A. Walker reported changes in her beneficial ownership on Form 4. The filing shows a 09/30/2025 grant of 1,563 common stock units to Ms. Walker with a $0 price, recorded as an acquisition tied to her director service, and a reported disposal of 3,053 common stock units (listed separately). After the reported acquisition, the filing shows Ms. Walker beneficially owns 42,229 shares indirectly through the Walker Joint Revocable Trust. The Form 4 was signed under power of attorney on 10/01/2025.

Rhea-AI Summary

Compass Minerals (CMP) director Richard P. Dealy received 1,530 common stock units on 09/30/2025 as compensation for his service as a director. The units were granted at no cash price ($0) and increased his total beneficial ownership to 30,156 shares following the award. The Form 4 was filed as a single reporting person filing and signed by an attorney-in-fact on 10/01/2025. The filing explicitly states the units represent common stock units granted by the issuer in connection with the reporting person’s director service.