Compass Minerals International, Inc.
US ˙ NYSE ˙ US20451N1019

SecurityCMP / Compass Minerals International, Inc.
InstitutionMain Street Group, LTD
Latest Disclosed Ownership205 shares
Latest Disclosed Value $ 4,787
Main Street Group, LTD ownership in CMP / Compass Minerals International, Inc.

On May 6, 2026 - Main Street Group, LTD filed a 13F-HR form disclosing ownership of 205 shares of Compass Minerals International, Inc. (US:CMP) valued at $4,787 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 0 shares of Compass Minerals International, Inc.. The current value of the position is $6,691 USD.

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)
2026-05-06 2026-03-31 13F COMPASS MINERALS INTL IN STOK 20451N101 205 205 5 0.0014
2026-01-26 2025-12-31 13F COMPASS MINERALS INTL IN STOK 20451N101 0 -557 -100.00 0 -100.00
2025-11-07 2025-09-30 13F COMPASS MINERALS INTL IN STOK 20451N101 557 -400 -41.80 11 -47.37 0.0031
2025-07-15 2025-06-30 13F COMPASS MINERALS INTL IN STOK 20451N101 957 -104 -9.80 19 111.11 0.0063
2025-05-14 2025-03-31 13F COMPASS MINERALS INTERNATIONAL Common Stock 20451N101 1,061 104 10.87 10 -10.00 0.0038
2025-02-14 2024-12-31 13F COMPASS MINERALS INTL IN STOK 20451N101 957 86 9.87 11 0.00 0.0040
2024-11-13 2024-09-30 13F COMPASS MINERALS INTL IN STOK 20451N101 871 352 67.82 10 100.00 0.0041
2024-08-06 2024-06-30 13F COMPASS MINERALS INT STOK 20451N101 519 -1,456 -73.72 5 -83.33 0.0022
2024-05-15 2024-03-31 13F COMPASS MINERALS INT STOK 20451N101 1,975 1,861 1,632.46 31 1,400.00 0.0135
2024-02-15 2023-12-31 13F COMPASS MINERALS INT COMMON STOCK 20451N101 114 114 3 0.0010
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.