COMPASS MINERALS INTERNATIONAL INC

CMPNYSE

$22.20+0.39 (+1.79%)as of Oct 2, 2026

Legend

Insider buy

Insider sell

Congress buy

Congress sell

Hedge Funds
bought vs soldGreener markers show more buyers; redder markers show more sellers.

Company share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size.

Insider buy
Insider sell
Congress buy
Congress sell
Hedge Funds bought vs sold

Share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size. Greener fund markers mean more buyers.

Insider Buy
Insider Sell
Congress Buy
Congress Sell
Hedge funds bought vs sold
BuybackNo changeNet dilution

COMPASS MINERALS INTERNATIONAL INC price and activity chart data

Showing the 1Y range: Oct 2, 2025 to Oct 2, 2026. Price (+14.7%). 0 insider or congressional trades plotted in this window as 0 markers; nearby trades of the same kind are grouped.

Transactions plotted on the price chart
Date	Category	Person	Role	Action	Amount	Change in holding

Largest institutional holders

13F · Q2 2026

Fund	% of company held	Value	% of portfolio	Quarterly activity
Koch, Inc.	16.77%	$219M	20.01%	Not reported
SailingStone Capital Partners LLC	7.99%	$104M	19.53%	Reduce 30.55%
BlackRock, Inc.	7.34%	$95.8M	0.00%	Not reported
State Street Corp	5.82%	$76M	0.00%	Not reported
American Century Companies Inc	5.42%	$70.8M	0.03%	Not reported
Vanguard Capital Management LLC	4.23%	$55.3M	0.00%	Not reported
Irenic Capital Management LP	2.55%	$33.3M	1.60%	Reduce 25.58%
Dimensional Fund Advisors LP	2.27%	$29.6M	0.01%	Not reported
Jacobs Levy Equity Management, Inc	2.11%	$27.6M	0.10%	Not reported
Gumshoe Capital Management LLC	2.08%	$27.2M	24.82%	Reduce 31.03%
Geode Capital Management, LLC	2.01%	$26.2M	0.00%	Not reported
Vanguard Portfolio Management LLC	1.66%	$21.7M	0.00%	Not reported
Charles Schwab Investment Management Inc	1.56%	$20.4M	0.00%	Not reported
AQR Capital Management LLC	1.52%	$19.8M	0.01%	Not reported
Engine Capital Management, LP	1.51%	$19.7M	1.92%	Reduce 56.01%
Newtyn Management, LLC	1.51%	$19.7M	2.46%	Reduce 17.88%
O'Keefe Stevens Advisory, Inc.	1.50%	$19.7M	4.03%	Add 3.41%
Lee Danner & Bass Inc	1.38%	$18.1M	1.04%	Reduce 4.13%
Federated Hermes, Inc.	1.37%	$17.9M	0.03%	Not reported
Ewing Morris & Co. Investment Partners Ltd.	1.36%	$14.8M	7.73%	Reduce 71.66%
Nuveen, LLC	1.24%	$16.2M	0.00%	Not reported
Arrowstreet Capital, Limited Partnership	1.13%	$14.8M	0.01%	Not reported
Morgan Stanley	1.05%	$13.7M	0.00%	Not reported
Ameriprise Financial Inc	1.04%	$13.6M	0.00%	Not reported
Hennessy Advisors Inc	0.82%	$10.8M	0.34%	New Not reported
Northern Trust Corp	0.73%	$9.57M	0.00%	Not reported
Goldman Sachs Group Inc	0.73%	$9.53M	0.00%	Not reported
Raymond James Financial Inc	0.69%	$8.95M	0.00%	Not reported
BNP Paribas Financial Markets	0.65%	$8.51M	0.00%	Not reported
Bank of America Corp	0.65%	$8.45M	0.00%	Not reported
Vanguard Fiduciary Trust Co	0.60%	$7.85M	0.00%	Not reported
State of Wisconsin Investment Board	0.46%	$5.96M	0.01%	Not reported
Invesco Ltd.	0.45%	$5.89M	0.00%	Not reported
JPMorgan Chase & Co	0.43%	$5.6M	0.00%	Not reported
D. E. Shaw & Co., Inc.	0.42%	$5.52M	0.00%	Not reported
Millennium Management LLC	0.39%	$5.12M	0.00%	Not reported
FMR LLC	0.37%	$4.77M	0.00%	Not reported
CastleKnight Management LP	0.34%	$4.42M	0.06%	Reduce 59.57%
Trexquant Investment LP	0.32%	$4.18M	0.02%	Not reported
Thompson Siegel & Walmsley LLC	0.30%	$3.86M	0.07%	Reduce 13.54%
Bank of New York Mellon Corp	0.25%	$3.28M	0.00%	Not reported
Lighthouse Investment Partners, LLC	0.23%	$3.04M	0.08%	Add 62.95%
SG Americas Securities, LLC	0.21%	$2.73M	0.00%	Not reported
Natixis	0.21%	$2.69M	0.01%	Not reported
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	0.20%	$2.63M	0.00%	Not reported
XTX Topco Ltd	0.19%	$2.53M	0.03%	Not reported
Martingale Asset Management L P	0.19%	$2.51M	0.06%	Not reported
Citigroup Inc	0.18%	$2.36M	0.00%	Not reported
UBS Group AG	0.17%	$2.2M	0.00%	Not reported
Swiss National Bank	0.17%	$2.18M	0.00%	Not reported

50 of 219 holders

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