Minerals Technologies Inc.
US ˙ NYSE ˙ US6031581068

SecurityMTX / Minerals Technologies Inc.
InstitutionAssetmark, Inc
Latest Disclosed Ownership577 shares
Latest Disclosed Value $ 40,921
Assetmark, Inc ownership in MTX / Minerals Technologies Inc.

On May 6, 2026 - Assetmark, Inc filed a 13F-HR form disclosing ownership of 577 shares of Minerals Technologies Inc. (US:MTX) valued at $40,921 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 577 shares of Minerals Technologies Inc.. This represents a change in shares of 0.00% during the quarter. The current value of the position is $43,298 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 MINERALS TECHNOLOGIES COM 603158106 577 0 0.00 41 14.29 0.0001
2026-01-23 2025-12-31 13F MINERALS TECHNOLOGIES COM 603158106 577 -152 -20.85 35 -22.22 0.0001
2025-11-06 2025-09-30 13F MINERALS TECHNOLOGIES COM 603158106 729 0 0.00 45 12.50 0.0001
2025-08-04 2025-06-30 13F MINERALS TECHNOLOGIES COM 603158106 729 160 28.12 40 11.11 0.0001
2025-05-06 2025-03-31 13F MINERALS TECHNOLOGIES COM 603158106 569 0 0.00 36 -16.28 0.0001
2025-02-06 2024-12-31 13F MINERALS TECHNOLOGIES COM 603158106 569 0 0.00 43 0.00 0.0001
2024-11-01 2024-09-30 13F MINERALS TECHNOLOGIES COM 603158106 569 0 0.00 44 -8.51 0.0001
2024-08-13 2024-06-30 13F MINERALS TECHNOLOGIES COM 603158106 569 -160 -21.95 47 -12.96 0.0001
2024-05-07 2024-03-31 13F MINERALS TECHNOLOGIES COM 603158106 729 0 0.00 55 5.88 0.0002
2024-02-09 2023-12-31 13F MINERALS TECHNOLOGIES COM 603158106 729 0 0.00 52 30.77 0.0002
2023-10-27 2023-09-30 13F MINERALS TECHNOLOGIES COM 603158106 729 0 0.00 40 -7.14 0.0002
2023-08-11 2023-06-30 13F MINERALS TECHNOLOGIES INC COM COM 603158106 729 0 0.00 42 -4.55 0.0002
2023-05-05 2023-03-31 13F MINERALS TECHNOLOGIES INC COM COM 603158106 729 0 0.00 44 0.00 0.0002
2023-02-10 2022-12-31 13F MINERALS TECHNOLOGIES COM 603158106 729 0 0.00 44 22.22 0.0002
2022-11-01 2022-09-30 13F MINERALS TECHNOLOGIES COM 603158106 729 0 0.00 36 -20.00 0.0002
2022-08-03 2022-06-30 13F MINERALS TECHNOLOGIES INC COM COM 603158106 729 50 7.36 45 0.00 0.0002
2022-05-13 2022-03-31 13F MINERALS TECHNOLOGIES INC COM COM 603158106 679 0 0.00 45 -10.00 0.0002
2022-02-14 2021-12-31 13F MINERALS TECHNOLOGIES INC COM COM 603158106 679 40 6.26 50 11.11 0.0002
2021-11-12 2021-09-30 13F MINERALS TECHNOLOGIES INC COM COM 603158106 639 0 0.00 45 -10.00 0.0002
2021-08-16 2021-06-30 13F MINERALS TECHNOLOGIES INC COM COM 603158106 639 -93 -12.70 50 -9.09 0.0002
2021-05-14 2021-03-31 13F MINERALS TECHNOLOGIES COM 603158106 732 30 4.27 55 25.00 0.0003
2021-02-10 2020-12-31 13F MINERALS TECHNOLOGIES INC COM COM 603158106 702 209 42.39 44 76.00 0.0002
2020-11-13 2020-09-30 13F MINERALS TECHNOLOGIES INC COM COM 603158106 493 430 682.54 25 733.33 0.0002
2020-08-11 2020-06-30 13F MINERALS TECHNOLOGIES INC COM COM 603158106 63 -1 -1.56 3 50.00 0.0000
2020-05-12 2020-03-31 13F MINERALS TECHNOLOGIES INC COM COM 603158106 64 -19 -22.89 2 -60.00 0.0000
2020-02-11 2019-12-31 13F MINERALS TECHNOLOGIES INC COM COM 603158106 83 0 0.00 5 25.00 0.0000
2019-11-13 2019-09-30 13F MINERALS TECHNOLOGIES INC COM COM 603158106 83 39 88.64 4 100.00 0.0000
2019-08-14 2019-06-30 13F MINERALS TECHNOLOGIES INC COM COM 603158106 44 0 0.00 2 -33.33 0.0000
2019-05-14 2019-03-31 13F MINERALS TECHNOLOGIES INC COM COM 603158106 44 0 0.00 3 50.00 0.0000
2019-02-13 2018-12-31 13F MINERALS TECHNOLOGIES INC COM COM 603158106 44 0 0.00 2 -33.33 0.0000
2018-11-13 2018-09-30 13F MINERALS TECHNOLOGIES INC COM COM 603158106 44 -20 -31.25 3 -40.00 0.0000
2018-08-01 2018-06-30 13F MINERALS TECHNOLOGIES INC COM COM 603158106 64 0 0.00 5 25.00 0.0000
2018-05-16 2018-03-31 13F MINERALS TECHNOLOGIES INC COM COM 603158106 64 -6 -8.57 4 -20.00 0.0000
2018-02-13 2017-12-31 13F MINERALS TECHNOLOGIES INC COM COM 603158106 70 -10 -12.50 5 -16.67 0.0001
2017-11-08 2017-09-30 13F MINERALS TECHNOLOGIES INC COM COM 603158106 80 5 6.67 6 0.00 0.0001
2017-08-14 2017-06-30 13F MINERALS TECHNOLOGIES INC COM COM 603158106 75 1 1.35 6 0.00 0.0001
2017-09-15 2017-03-31 13F/A-1 MINERALS TECHNOLOGIES INC COM COM 603158106 74 -3 -3.90 6 0.00 0.0001
2017-05-08 2017-03-31 13F MINERALS TECHNOLOGIES INC COM COM 603158106 74 -3 6
2017-09-15 2016-12-31 13F/A-1 MINERALS TECHNOLOGIES INC COM COM 603158106 77 1 1.32 6 20.00 0.0001
2017-02-14 2016-12-31 13F MINERALS TECHNOLOGIES INC COM COM 603158106 77 1 6
2017-09-14 2016-09-30 13F/A-1 MINERALS TECHNOLOGIES INC COM COM 603158106 76 -62 -44.93 5 -37.50 0.0001
2016-11-04 2016-09-30 13F MINERALS TECHNOLOGIES INC COM COM 603158106 76 -62 5
2017-09-14 2016-06-30 13F/A-1 MINERALS TECHNOLOGIES INC COM COM 603158106 138 0 0.00 8 0.00 0.0001
2016-08-08 2016-06-30 13F MINERALS TECHNOLOGIES INC COM COM 603158106 138 0 8
2017-09-14 2016-03-31 13F/A-1 MINERALS TECHNOLOGIES INC COM COM 603158106 138 12 9.52 8 33.33 0.0001
2016-05-13 2016-03-31 13F MINERALS TECHNOLOGIES INC COM COM 603158106 138 12 8
2017-09-14 2015-12-31 13F/A-1 MINERALS TECHNOLOGIES INC COM COM 603158106 126 123 4,100.00 6 0.0001
2016-02-12 2015-12-31 13F MINERALS TECHNOLOGIES INC COM COM 603158106 126 123 6
2016-01-05 2015-09-30 13F/A-1 MINERALS TECHNOLOGIES INC COM COM 603158106 3 3 0 0.0000
2015-11-10 2015-09-30 13F MINERALS TECHNOLOGIES INC COM COM 603158106 3 0 0.0000
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.