COMPASS MINERALS INTERNATIONAL INC

Mining & Quarrying of Nonmetallic Minerals (No Fuels)

CMP Mining & Metals People in Mining & Metals SEC CIK 0001227654 ↗

Computed from SEC EDGAR filings and closing prices — not copied from any wealth ranking. Dataset . How we calculate this.

Market capitalisation
$1.04B
41,980,874 shares Covers every share class this company has on file.
Insiders on file
7
people who have filed Form 3, 4 or 5 naming this issuer
Value of insider-held stock
$9.33M
from the holdings reported on Forms 3/4/5; this figure has no separate as-of date on file
Insider-held share of market cap
0.90%
insider-held value divided by market capitalisation

What COMPASS MINERALS INTERNATIONAL INC reports

Revenue and net income below are for fiscal period FY2025, the period label carried by this company’s own annual XBRL filings to the SEC. Fiscal years do not line up between companies — one company’s FY2026 can cover much the same months as another’s FY2025 — so compare the periods, not just the numbers.

Revenue
$1.24B
FY2025 annual revenue, from this company’s own annual XBRL filings to the SEC
Net income
-$79.80M
FY2025 a loss for the period, from this company’s own annual XBRL filings to the SEC
Employees
1,800
Yahoo Finance
Where the employee count comes from

Headcount comes from Yahoo Finance, not from a filing. The date beside it is the day we retrieved the figure — it is not the date the company counted its staff, and Yahoo does not publish that date. Unlike the SEC filings behind the other figures on this page, this one carries no open licence, so we publish the number and nothing else from that source.

Insiders at COMPASS MINERALS INTERNATIONAL INC

Shares is what each person last reported holding here.

Everyone below has filed at least one insider report against this company.

Value is that share count priced at the same closing price used everywhere else on this site. A row priced from only some of a person’s securities says so — we do not quietly present a partial sum as a complete one.

Rows are grouped by the role each person reports.

The role comes from the relationship boxes a person ticks on their own insider filings — officer, director, ten per cent owner — not from anything we infer. Somebody who is both an officer and a director appears once, in the combined group, so the row count still matches the figure at the top of this page. Where no filing states a role we say so instead of guessing one.

People who file insider reports against COMPASS MINERALS INTERNATIONAL INC.
Insider Reported role Shares Value Last action
Officers who also sit on the board 4
Joseph E Reece Other Executive 113,649 $2.88M A Grant or award Jun 30, 2026 position reported
Edward C. Dowling CEO 66,261 $1.68M F Shares withheld for taxes Jan 18, 2026 position reported
Richard P. Dealy CEO 43,557 $1.10M A Grant or award Jun 30, 2026 position reported
Denise M Merle Denise M Merle SVP 220 $5.6K A Grant or award Dec 31, 2025 position reported
Directors 3
Lori A. Walker Board Member 58,715 $1.49M M Option exercise or conversion Mar 5, 2026 position reported
Melissa M Miller Melissa M Miller Board Member 43,152 $1.09M M Option exercise or conversion Mar 5, 2026 position reported
Gareth T Joyce Board Member 43,118 $1.09M M Option exercise or conversion Mar 5, 2026 position reported

Events from filings

Detected automatically in the filings linked below. Each headline is built from the numbers in those filings, not written by a model. Newest first; events older than 45 days stay listed and are marked as older.

COMPASS MINERALS INTERNATIONAL INC (CMP) filed a Form 8-K under Item 5.02 (directors and officers) on Aug 5, 2026

Director or officer change filing

The company filed a current report that includes Item 5.02, the item used to report departures, elections or appointments of directors and certain officers, and related pay arrangements. We record only that this filing exists: we have not extracted who left, who joined or whose role changed. Open the filing to read it.

Form 8-K filed Aug 5, 2026, items 5.02, 9.01. SEC filing ↗

Source: SEC EDGAR (United States); every row links to where it was published. Event computed Sep 14, 2026.

Recent insider transactions

Of the 63 rows we hold, 1 are open-market purchases (P) and 0 open-market sales — the only codes we count as buying or selling.

The rest — awards, shares withheld to pay tax, option exercises, gifts and so on — follow from an employment contract or a transfer arranged off-market, not from a decision to buy or sell, so counting them would turn this into a pay table.

A price of 0.00 is a real reported figure on gifts (G) and share awards (A) — not a gap in our data.

Insider transactions disclosed to the SEC for COMPASS MINERALS INTERNATIONAL INC, newest first, each with the filing behind it.
Date Insider Transaction Shares Price Value Filing
Jun 30, 2025 Melissa M Miller A Grant or award 1,400 $0.00 $0 SEC filing ↗
Jun 30, 2025 Lori A. Walker A Grant or award 1,494 $0.00 $0 SEC filing ↗
Jun 30, 2025 Richard P. Dealy A Grant or award 1,463 $0.00 $0 SEC filing ↗
Jun 30, 2025 Joseph E Reece A Grant or award 2,209 $0.00 $0 SEC filing ↗
Mar 31, 2025 Gareth T Joyce A Grant or award 2,961 $0.00 $0 SEC filing ↗
Mar 31, 2025 Melissa M Miller A Grant or award 3,028 $0.00 $0 SEC filing ↗
Mar 31, 2025 Lori A. Walker A Grant or award 3,230 $0.00 $0 SEC filing ↗
Mar 31, 2025 Richard P. Dealy A Grant or award 3,163 $0.00 $0 SEC filing ↗
Mar 31, 2025 Joseph E Reece A Grant or award 4,777 $0.00 $0 SEC filing ↗
Mar 26, 2025 Joseph E Reece P Open-market purchase 5,000 $9.68 $48.4K SEC filing ↗
Mar 5, 2025 Gareth T Joyce M Option exercise or conversion 5,685 $0.00 $0 SEC filing ↗
Mar 5, 2025 Melissa M Miller M Option exercise or conversion 5,685 $0.00 $0 SEC filing ↗
Mar 5, 2025 Lori A. Walker M Option exercise or conversion 5,685 $0.00 $0 SEC filing ↗
Mar 5, 2025 Richard P. Dealy M Option exercise or conversion 5,685 $0.00 $0 SEC filing ↗
Mar 5, 2025 Joseph E Reece M Option exercise or conversion 10,659 $0.00 $0 SEC filing ↗
Jan 18, 2025 Edward C. Dowling F Shares withheld for taxes 7,042 $14.21 $100.1K SEC filing ↗
Jan 18, 2025 Edward C. Dowling M Option exercise or conversion 22,350 $0.00 $0 SEC filing ↗
Dec 31, 2024 Gareth T Joyce A Grant or award 2,445 $0.00 $0 SEC filing ↗
Dec 31, 2024 Melissa M Miller A Grant or award 2,500 $0.00 $0 SEC filing ↗
Dec 31, 2024 Lori A. Walker A Grant or award 2,667 $0.00 $0 SEC filing ↗
Dec 31, 2024 Richard P. Dealy A Grant or award 2,612 $0.00 $0 SEC filing ↗
Dec 31, 2024 Joseph E Reece A Grant or award 3,945 $0.00 $0 SEC filing ↗
Sep 30, 2024 Gareth T Joyce A Grant or award 2,288 $0.00 $0 SEC filing ↗
Sep 30, 2024 Melissa M Miller A Grant or award 2,340 $0.00 $0 SEC filing ↗
Sep 30, 2024 Lori A. Walker A Grant or award 2,496 $0.00 $0 SEC filing ↗

From SEC Form 4 filings. Every row links to the filing it came from. How we calculate this.

What a Form 4 is

The report an officer, director or large shareholder must file after trading their own company’s stock.

Corporate ownership links — 2 filers hold a position

Who owns COMPASS MINERALS INTERNATIONAL INC

Each row is one filer naming this company.

Funds, trusts and other companies file the same ownership forms that executives do. Everything below is taken from those filings, with the position exactly as the filing states it.

Filers holding a position in COMPASS MINERALS INTERNATIONAL INC

Funds, trusts and companies that disclose an ownership position in COMPASS MINERALS INTERNATIONAL INC.
Owner Reported role Shares Filed
Koch, Inc. Director,TenPercentOwner 7,034,609
KOCH INDUSTRIES INC Other,TenPercentOwner —

See the full ownership map — every entity that files as an owner of a US public company.

Subsidiaries — 42 legal entities

Subsidiaries of COMPASS MINERALS INTERNATIONAL INC

42 legal entities named in the subsidiary exhibit filed with this company’s most recent 10-K. . Filing on SEC.gov.

This is not the full list. SEC rules only require a company to name its significant subsidiaries.

What that leaves out

Smaller entities are left out of the exhibit entirely. A short list here means a short exhibit — it does not mean the company owns nothing else. Nothing on this page is inferred: every name below is copied from the filing.

Subsidiaries COMPASS MINERALS INTERNATIONAL INC names in its most recent annual report, with the place each one is organised.
Subsidiary Organised in
Clyman Bay Resources, Inc. Delaware, U.S.
CMI Nova Scotia Company Nova Scotia, Canada
CMP Canada Inc. Nova Scotia, Canada
CMP Capital, Inc. Delaware, U.S.
Compass Canada Limited Partnership Ontario, Canada
Compass Canada Potash Holdings Inc. Saskatchewan, Canada
Compass Cayman Holdings Ltd. Cayman Islands
Compass Minerals (Europe) Limited England and Wales
Compass Minerals America Inc. Delaware, U.S.
Compass Minerals Canada Corp. Nova Scotia, Canada
Compass Minerals Chile Limitada Chile
Compass Minerals do Brasil Ltda. Brazil
Compass Minerals Europe B.V. Netherlands
Compass Minerals International Limited Partnership Ontario, Canada
Compass Minerals Lithium Corp of America Inc. Delaware, U.S.
Compass Minerals Louisiana Inc. Delaware, U.S.
Compass Minerals Nova Scotia Company Nova Scotia, Canada
Compass Minerals Ogden Inc. Delaware, U.S.
Compass Minerals Receivables LLC Delaware, U.S.
Compass Minerals Storage & Archives Limited England and Wales
Compass Minerals UK Holdings Limited England and Wales
Compass Minerals UK Limited England and Wales
Compass Minerals USA LLC Delaware, U.S.
Compass Minerals Winnipeg Unlimited Liability Company Nova Scotia, Canada
Compass Minerals Wynyard Inc. Saskatchewan, Canada
Compass Resources Canada Company Nova Scotia, Canada
Compass South American Salt Holdings Ltd. Cayman Islands
Curlew Valley Farms, LLC Utah, U.S.
DeepStore Holdings Limited England and Wales
DeepStore Limited England and Wales
Dove Creek Grazing, LLC Utah, U.S.
Exhibit 21.1 —
Fortress Asset Protection Group, LLC Delaware, U.S.
Fortress Employment Group, Inc. California, U.S.
Fortress North America, LLC Delaware, U.S.
FRS Group LLC Delaware, U.S.
Great Salt Lake Holdings, LLC Delaware, U.S.
GSL Corporation Delaware, U.S.
NAMSCO Inc. Delaware, U.S.
NASC Nova Scotia Company Nova Scotia, Canada
RT 094 Empreendimentos e Participações Ltda. Brazil
Salt Union Limited England and Wales
What counts as a subsidiary

A subsidiary is a separate legal entity this company controls; it is not the same thing as a brand, a division or an office. These entities do not file with the SEC in their own right, so there is no separate page to open for them.

Think a number here is wrong? Open the linked filing and compare — how to report it.

Sources and technical notes

Every figure on this page comes from filings to the U.S. SEC via EDGAR. Nothing here is estimated, and nothing is taken from press coverage or company websites.

Share count: cover page of the latest filing (dei:EntityCommonStockSharesOutstanding), taken from COMPASS MINERALS INTERNATIONAL INC’s own filings and multiplied by our closing price. Full method.

What that share count means

the share count the company itself prints on the cover of its most recent filing, as of the date it signed that filing.

We do not take a market cap from a data vendor, and we do not estimate one: the figure is a share count from COMPASS MINERALS INTERNATIONAL INC’s own SEC filings multiplied by the closing price we hold for the same stock.