Compass Minerals International, Inc.
US ˙ NYSE ˙ US20451N1019

SecurityCMP / Compass Minerals International, Inc.
InstitutionState Street Corp
Latest Disclosed Ownership2,322,476 shares
Ownership 5.50%
State Street Corp ownership in CMP / Compass Minerals International, Inc.

2026-05-12 - State Street Corp has filed an SCHEDULE 13G form with the Securities and Exchange Commission (SEC) disclosing ownership of 2,322,476 shares of Compass Minerals International, Inc. (US:CMP). This represents 5.5 percent ownership of the company. In their previous filing dated 2026-02-09 , State Street Corp had reported owning 2,049,285 shares, indicating an increase of 13.33 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File
Date		Effective
Date		Form Prev
Shares		 Latest
Shares		 ΔShares
(Percent)		 Ownership
(Percent)		 ΔOwnership
(Percent)
2026-05-12 2026-05-12 13G 2,049,285 2,322,476 13.33 5.50 12.24
2026-02-09 2026-02-09 13G 2,305,790 2,049,285 -11.12 4.90 -10.91
2025-11-10 2025-11-10 13G 794,645 2,305,790 190.17 5.50 189.47
2024-10-17 2024-10-17 13G/A 2,601,057 794,645 -69.45 1.90 -69.89
2024-01-25 2024-01-25 13G/A 2,066,624 2,601,057 25.86 6.31 25.20
2023-02-08 2023-02-08 13G/A 1,874,613 2,066,624 10.24 5.04 -8.53
2022-02-10 2022-02-10 13G/A 1,823,952 1,874,613 2.78 5.51 2.61
2021-02-08 2021-02-08 13G 1,822,003 1,823,952 0.11 5.37 -0.19
2020-02-14 2020-02-14 13G 1,698,609 1,822,003 7.26 5.38 7.60
2019-02-13 2019-02-13 13G 1,698,609 5.00

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F COMPASS MINERALS INTL COM 20451N101 2,322,476 273,191 13.33 54,230 34.74 0.0019
2026-02-13 2025-12-31 13F COMPASS MINERALS INTL COM 20451N101 2,049,285 -256,505 -11.12 40,248 -9.09 0.0014
2025-11-14 2025-09-30 13F COMPASS MINERALS INTL COM 20451N101 2,305,790 262,539 12.85 44,271 7.85 0.0015
2025-08-14 2025-06-30 13F COMPASS MINERALS INTL COM 20451N101 2,043,251 347,583 20.50 41,049 160.59 0.0015
2025-05-15 2025-03-31 13F COMPASS MINERALS INTL COM 20451N101 1,695,668 39,222 2.37 15,753 -15.47 0.0006
2025-02-14 2024-12-31 13F COMPASS MINERALS INTL COM 20451N101 1,656,446 862,374 108.60 18,635 95.25 0.0007
2024-11-14 2024-09-30 13F COMPASS MINERALS INTL COM 20451N101 794,072 -1,438,240 -64.43 9,545 -58.61 0.0004
2024-08-14 2024-06-30 13F COMPASS MINERALS INTL COM 20451N101 2,232,312 -538,467 -19.43 23,060 -47.13 0.0010
2024-05-15 2024-03-31 13F COMPASS MINERALS INTL COM 20451N101 2,770,779 169,722 6.53 43,612 -33.78 0.0019
2024-02-14 2023-12-31 13F COMPASS MINERALS INTL COM 20451N101 2,601,057 217,048 9.10 65,859 -1.16 0.0032
2023-11-14 2023-09-30 13F COMPASS MINERALS INTL COM 20451N101 2,384,009 358,617 17.71 66,633 -3.24 0.0037
2023-08-14 2023-06-30 13F COMPASS MINERALS INTL COM 20451N101 2,025,392 -317,367 -13.55 68,863 -14.28 0.0036
2023-05-15 2023-03-31 13F COMPASS MINERALS INTL COM 20451N101 2,342,759 276,135 13.36 80,333 -5.19 0.0045
2023-05-15 2022-12-31 13F/A-99 COMPASS MINERALS INTL COM 20451N101 2,066,624 -262,426 -11.27 84,732 -5.58 0.0050
2023-05-15 2022-12-31 13F COMPASS MINERALS INTL COM 20451N101 2,066,624 -262,426 84,732 0.0050
2022-11-15 2022-09-30 13F COMPASS MINERALS INTL COM 20451N101 2,329,050 137,361 6.27 89,738 15.70 0.0057
2022-08-15 2022-06-30 13F COMPASS MINERALS INTL COM 20451N101 2,191,689 -411,521 -15.81 77,564 -52.55 0.0046
2022-05-16 2022-03-31 13F COMPASS MINERALS INTL COM 20451N101 2,603,210 728,597 38.87 163,456 70.70 0.0081
2022-02-14 2021-12-31 13F COMPASS MINERALS INTL COM 20451N101 1,874,613 -31,487 -1.65 95,755 -21.99 0.0045
2021-11-15 2021-09-30 13F COMPASS MINERALS INTL COM 20451N101 1,906,100 123,258 6.91 122,753 16.19 0.0065
2021-08-16 2021-06-30 13F COMPASS MINERALS INTL COM 20451N101 1,782,842 -372,028 -17.26 105,651 -21.83 0.0056
2021-07-09 2021-03-31 13F/A-1 COMPASS MINERALS INTL COM 20451N101 2,154,870 330,918 18.14 135,153 20.06 0.0077
2021-05-17 2021-03-31 13F COMPASS MINERALS INTL COM 20451N101 2,154,870 330,918 135,153 0.0078
2021-02-16 2020-12-31 13F COMPASS MINERALS INTL COM 20451N101 1,823,952 186,458 11.39 112,574 15.83 0.0069
2020-11-10 2020-09-30 13F COMPASS MINERALS INTL COM 20451N101 1,637,494 51,974 3.28 97,185 25.73 0.0066
2020-08-14 2020-06-30 13F COMPASS MINERALS INTL COM 20451N101 1,585,520 62,227 4.09 77,294 31.90 0.0056
2020-06-19 2020-03-31 13F/A-1 COMPASS MINERALS INTL COM 20451N101 1,523,293 -298,710 -16.39 58,601 -47.24 0.0051
2020-05-11 2020-03-31 13F COMPASS MINERALS INTL COM 20451N101 1,523,293 -298,710 58,601 5,146.3477
2020-02-06 2019-12-31 13F COMPASS MINERALS INTL COM 20451N101 1,822,003 120,323 7.07 111,069 15.54 0.0076
2019-11-14 2019-09-30 13F COMPASS MINERALS INTL COM 20451N101 1,701,680 -115,437 -6.35 96,128 -3.73 0.0072
2019-08-14 2019-06-30 13F COMPASS MINERALS INTL COM 20451N101 1,817,117 47,209 2.67 99,851 3.76 0.0074
2019-05-15 2019-03-31 13F COMPASS MINERALS INTL COM 20451N101 1,769,908 71,299 4.20 96,230 35.89 0.0075
2019-02-12 2018-12-31 13F COMPASS MINERALS INTL COM 20451N101 1,698,609 -24,395 -1.42 70,815 -38.84 0.0064
2018-11-09 2018-09-30 13F COMPASS MINERALS INTL Common equity shares 20451N101 1,723,004 -59,627 -3.34 115,793 -1.21 0.0089
2018-08-14 2018-06-30 13F COMPASS MINERALS INTL Common equity shares 20451N101 1,782,631 -20,944 -1.16 117,210 7.78 0.0098
2018-05-15 2018-03-31 13F COMPASS MINERALS INTL Common equity shares 20451N101 1,803,575 115,292 6.83 108,750 -10.84 0.0092
2018-02-14 2017-12-31 13F COMPASS MINERALS INTL Common equity shares 20451N101 1,688,283 27,685 1.67 121,974 13.18 0.0098
2017-11-14 2017-09-30 13F COMPASS MINERALS INTL Common equity shares 20451N101 1,660,598 45,407 2.81 107,767 2.17 0.0093
2017-08-14 2017-06-30 13F COMPASS MINERALS INTL Common equity shares 20451N101 1,615,191 305,111 23.29 105,474 18.66 0.0093
2017-05-15 2017-03-31 13F COMPASS MINERALS INTL Common equity shares 20451N101 1,310,080 -49,983 -3.68 88,887 -16.59 0.0079
2017-02-09 2016-12-31 13F COMPASS MINERALS INTL Common equity shares 20451N101 1,360,063 67,971 5.26 106,562 11.90 0.0100
2017-01-13 2016-09-30 13F/A-1 COMPASS MINERALS INTL Common equity shares 20451N101 1,292,092 74,995 6.16 95,227 5.46 0.0096
2016-11-14 2016-09-30 13F COMPASS MINERALS INTL Common equity shares 20451N101 1,292,092 95,227
2016-08-12 2016-06-30 13F COMPASS MINERALS INTL Common equity shares 20451N101 1,217,097 53,672 4.61 90,295 9.53 0.0097
2016-05-20 2016-03-31 13F/A-1 COMPASS MINERALS INTL Common equity shares 20451N101 1,163,425 157,777 15.69 82,435 8.91 0.0089
2016-05-12 2016-03-31 13F COMPASS MINERALS INTL Common equity shares 20451N101 1,163,425 82,435
2016-02-16 2015-12-31 13F COMPASS MINERALS INTL Common equity shares 20451N101 1,005,648 42,669 4.43 75,694 0.30 0.0083
2015-11-16 2015-09-30 13F COMPASS MINERALS INTL Common equity shares 20451N101 962,979 -68,033 -6.60 75,468 -10.88 0.0088
2015-08-13 2015-06-30 13F COMPASS MINERALS INTL Common equity shares 20451N101 1,031,012 -58,461 -5.37 84,686 -16.61 0.0091
2015-05-15 2015-03-31 13F COMPASS MINERALS INTL Common equity shares 20451N101 1,089,473 2,742 0.25 101,550 7.62 0.0104
2015-02-11 2014-12-31 13F COMPASS MINERALS INTL Common equity shares 20451N101 1,086,731 -33,708 -3.01 94,360 -0.07 0.0094
2014-11-12 2014-09-30 13F/A-1 COMPASS MINERALS INTL Common equity shares 20451N101 1,120,439 14,669 1.33 94,428 -10.80 0.0102
2014-11-10 2014-09-30 13F COMPASS MINERALS INTL Common equity shares 20451N101 1,120,439 94,428
2014-08-12 2014-06-30 13F COMPASS MINERALS INTL Common equity shares 20451N101 1,105,770 -72,500 -6.15 105,866 8.88 0.0114
2014-05-15 2014-03-31 13F/A-1 COMPASS MINERALS INTL Common equity shares 20451N101 1,178,270 52,415 4.66 97,233 7.89 0.0110
2014-05-13 2014-03-31 13F COMPASS MINERALS INTL Common equity shares 20451N101 1,178,695 97,268
2014-02-06 2013-12-31 13F/A-1 COMPASS MINERALS INTL Common equity shares 20451N101 1,125,855 -74,749 -6.23 90,120 -1.58 0.0100
2014-02-06 2013-12-31 13F COMPASS MINERALS INTL Common equity shares 20451N101 1,406,181 105,053
2013-11-12 2013-09-30 13F COMPASS MINERALS INTL Common equity shares 20451N101 1,200,604 -14,440 -1.19 91,568 -10.85 0.0113
2013-08-08 2013-06-30 13F COMPASS MINERALS INTL Common equity shares 20451N101 1,215,044 1,215,044 102,711 0.0134
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.