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Compass Minerals CMP

US equityMarket cap rank #3277Other Industrial Metals & Mining

$22.57 −$0.13 (-0.57%)

Pre-market · Oct 8, 8:10 am ET · After hours $22.57 0.00%

Open$22.30

Prev close$22.70

Day range$22.05 – $22.64

Volume322.3K

Market cap$947.51M

P/E (TTM)53.7

Dividend yield–

Ownership & positioning

Who holds it, who is betting against it, and where the big money is moving

Institutional ownership100.4%-0.72 pts vs. prior quarter

Institutions holding282+3 vs. prior quarter

Insider trades (recent)42 buys / 8 sellsNet buying

Short interest4.93% of floatDays to cover 5.3 · as of 15 Sep 2026

Short-sale volume share22.2%5-day average of daily volume

Short-sale volume as % of daily volume

Large-order net flow, last 20 sessions

Net of large-order buying minus selling, in USD. Over this window: +$298.4K (10 inflow days, 10 outflow days).

Net flow by order size, last 20 sessions

Super/Big orders approximate institutional-size trades; Mid/Small approximate retail-size trades. Net buy minus sell value in each bucket, summed over the window.

The five largest holders on file together own 43.3% of shares outstanding.

Largest holders

Spring Creek Capital, LLC16.76%
SailingStone Capital Partners LLC7.98%
BlackRock7.33%
State Street Global Advisors5.82%
M Partners Capital LLC5.45%
American Century Investment Management5.42%
Vanguard Capital Management, LLC4.83%
Irenic Capital Management LP2.54%

By investor type

Mutual Fund76.02%
Hedge Fund17.70%
Public Company3.16%
Private Company1.87%
Individual/Insider0.84%
Government Pension Fund0.83%
Insurance Company0.71%
Sovereign Wealth Fund0.08%

Reported short interest has risen from 3.03% to 4.93% of float over the last 6 biweekly reports (30 Jun 2026 to 15 Sep 2026).

Recent institutional activity

Holder	Type	Period	Share change	New stake
Nuveen Asset Management LLC	Insurance Company	2026/Q3	+97,835	0.7%
Jacobs Levy Equity Management Inc	Mutual Fund	2026/Q3	+886,009	2.1%
American Century Investment Management	Mutual Fund	2026/Q3	+594,903	5.4%
AQR Capital Management	Hedge Fund	2026/Q3	+566,098	1.5%
Arrowstreet Capital, Limited Partnership	Mutual Fund	2026/Q3	+408,782	1.1%
Hennessy Advisors, Inc.	Mutual Fund	2026/Q3	+345,500	0.8%
BlackRock	Mutual Fund	2026/Q3	+225,710	7.3%
BNP Paribas Financial Markets SNC	Private Company	2026/Q3	+224,899	0.7%
Teachers Insurance and Annuity Association-College Retirement Equities Fund	Mutual Fund	2026/Q3	+169,311	1.1%
Raymond James Financial, Inc.	Public Company	2026/Q3	+161,298	0.7%
State of Wisconsin Investment Board	Government Pension Fund	2026/Q3	+157,948	0.5%
FMR	Mutual Fund	2026/Q3	+137,757	0.4%
Trexquant Investment LP	Hedge Fund	2026/Q3	+134,188	0.3%
D. E. Shaw & Co., L.P.	Hedge Fund	2026/Q3	+128,394	0.4%
Vanguard Portfolio Management, LLC	Mutual Fund	2026/Q3	+126,843	1.7%

Institutional buy/sell activity by reporting period, largest moves first.

Insider transactions

Date	Insider	Title	Transaction	Shares	Price	Held after
29 Sep 2026	Joseph Reece	Independent Non-Executive Chairperson	Other Acquisition	+1,702	–	76,372
29 Sep 2026	Richard Dealy	Independent Director	Other Acquisition	+1,333	–	47,093
29 Sep 2026	David Safran	Director	Other Acquisition	+1,135	–	3,191
10 Sep 2026	Amy Tills	Chief Human Resources Officer	Derivative Exercise and Sale	-2,142	$24.80	5,156
10 Sep 2026	Amy Tills	Chief Human Resources Officer	Derivative Exercise and Retained	+5,156	–	5,156
27 Jul 2026	Ashley Ward	VP, Corporate Controller & Principal Accounting Officer	Derivative Exercise and Sale	-2,443	$29.69	7,725
27 Jul 2026	Ashley Ward	VP, Corporate Controller & Principal Accounting Officer	Derivative Exercise and Retained	+5,890	–	7,725
29 Jun 2026	Joseph Reece	Independent Non-Executive Chairperson	Other Acquisition	+1,205	–	73,348
29 Jun 2026	Richard Dealy	Independent Director	Other Acquisition	+944	–	45,760
29 Jun 2026	David Safran	Director	Other Acquisition	+804	–	2,056
23 Jun 2026	Benjamin Nichols	Chief Sales Officer	Derivative Exercise and Sale	-747	$28.66	16,237
23 Jun 2026	Benjamin Nichols	Chief Sales Officer	Derivative Exercise and Retained	+1,795	–	16,237
17 May 2026	Benjamin Nichols	Chief Sales Officer	Derivative Exercise and Sale	-195	$28.97	14,442
17 May 2026	Benjamin Nichols	Chief Sales Officer	Derivative Exercise and Retained	+490	–	14,442
12 May 2026	Benjamin Nichols	Chief Sales Officer	Derivative Exercise and Sale	-247	$30.21	13,952
12 May 2026	Benjamin Nichols	Chief Sales Officer	Derivative Exercise and Retained	+490	–	13,952
30 Mar 2026	Joseph Reece	Independent Non-Executive Chairperson	Other Acquisition	+1,816	–	72,143
30 Mar 2026	Richard Dealy	Independent Director	Other Acquisition	+1,259	–	44,816
30 Mar 2026	David Safran	Director	Other Acquisition	+1,071	–	1,252
4 Mar 2026	Joseph Reece	Independent Non-Executive Chairperson	Other Derivative Acquisition	+9,434	–	9,434

From Form 4/Form 144 filings. Negative share counts are disposals (sales, gifts, or shares withheld for taxes); positive are acquisitions.

Short interest, by report

Report date	Shares short	% of float	Days to cover
15 Sep 2026	2,067,822	4.9%	5.3
31 Aug 2026	2,118,849	5.0%	4.8
14 Aug 2026	1,834,262	4.4%	2.9
31 Jul 2026	1,498,087	3.6%	4.4
15 Jul 2026	1,341,947	3.2%	3.7
30 Jun 2026	1,273,426	3.0%	2.3

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