SEC Insider Transactions from DIETRICH DOUGLAS T.

Last updated: 2026-03-14 11:52 UTC | Total transactions: 52

DIETRICH DOUGLAS T, Chairman and CEO of Minerals Technologies Inc. ($MTX), made one open market purchase of common shares in the last year, totaling about $103 thousand. His most recent buy occurred on April 30, 2025. This places him 2,122nd among nearly 5,000 insiders for purchase value, below the average of $1.46 million across about 3.3 transactions per insider. He reported no open market sales in the period.

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Transaction Date Company Ticker Insider Name Title Transaction Type Security Shares Price Shares Owned Following Total Shares Outstanding % of Owned % of Outstanding
Feb. 24, 2026 KENNAMETAL INC $KMT DIETRICH DOUGLAS T Director A Stock Credits 642 $40.10 10,603.4830 77,083,000 6.45% 0.00%
Jan. 30, 2026 KENNAMETAL INC $KMT DIETRICH DOUGLAS T Director F Common Stock 25 $34.39 816.0000 77,083,000 2.97% 0.00%
Jan. 30, 2026 KENNAMETAL INC $KMT DIETRICH DOUGLAS T Director M Restricted Stock Units 841 $0.00 1,682.0000 77,083,000 33.33% 0.00%
Jan. 30, 2026 KENNAMETAL INC $KMT DIETRICH DOUGLAS T Director M Common Stock 841 $34.39 841.0000 77,083,000 9999.99% 0.00%
Jan. 26, 2026 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T CHAIRMAN AND CEO F Common Stock 6152 $68.89 180,535.6770 32,299,999 3.30% 0.02%
Jan. 26, 2026 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T CHAIRMAN AND CEO M Deferred Restricted Stock Units (DRSUs) 11123 $0.00 70,081.0000 32,299,999 13.70% 0.03%
Jan. 23, 2026 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T CHAIRMAN AND CEO M Common Stock 11016 $0.00 181,656.6770 32,299,999 6.46% 0.03%
Jan. 23, 2026 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T CHAIRMAN AND CEO F Common Stock 6092 $68.77 175,564.6770 32,299,999 3.35% 0.02%
Jan. 26, 2026 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T CHAIRMAN AND CEO M Common Stock 11123 $0.00 186,687.6770 32,299,999 6.34% 0.03%
Jan. 23, 2026 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T CHAIRMAN AND CEO M Deferred Restricted Stock Units (DRSUs) 11016 $0.00 81,204.0000 32,299,999 11.95% 0.03%
Jan. 21, 2026 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T CHAIRMAN AND CEO F Common Stock 5630 $66.92 170,640.6770 32,299,999 3.19% 0.02%
Jan. 21, 2026 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T CHAIRMAN AND CEO M Common Stock 10033 $0.00 176,270.6770 32,299,999 6.04% 0.03%
Jan. 21, 2026 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T CHAIRMAN AND CEO M Deferred Restricted Stock Units (DRSUs) 10033 $0.00 92,220.0000 32,299,999 9.81% 0.03%
Jan. 20, 2026 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T CHAIRMAN AND CEO A Employee Stock Option (Right to Buy) 33494 $0.00 33,494.0000 32,299,999 9999.99% 0.10%
Jan. 20, 2026 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T CHAIRMAN AND CEO A Deferred Restricted Stock Units (DRSUs) 39000 $0.00 102,253.0000 32,299,999 61.66% 0.12%
Nov. 24, 2025 KENNAMETAL INC $KMT DIETRICH DOUGLAS T Director A Stock Credits 893 $27.12 9,657.7920 76,829,000 10.19% 0.00%
Aug. 26, 2025 KENNAMETAL INC $KMT DIETRICH DOUGLAS T Director A Stock Credits 991 $21.44 8,595.9520 77,894,000 13.03% 0.00%
Aug. 15, 2025 KENNAMETAL INC $KMT DIETRICH DOUGLAS T Director A Stock Credits 6898 $0.00 6,898.0000 77,894,000 9999.99% 0.01%
May 27, 2025 KENNAMETAL INC $KMT DIETRICH DOUGLAS T Director A Stock Credits 977 $21.74 1,618.5070 78,495,000 152.48% 0.00%
April 30, 2025 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T CHAIRMAN AND CEO P COMMON STOCK 2000 $51.56 166,179.2560 32,299,999 1.22% 0.01%
Feb. 25, 2025 KENNAMETAL INC $KMT DIETRICH DOUGLAS T Director A Stock Credits 635 $22.30 635.2020 78,495,000 9999.99% 0.00%
Feb. 1, 2025 KENNAMETAL INC $KMT DIETRICH DOUGLAS T Director A Restricted Stock Units 2523 $0.00 2,523.0000 78,495,000 9999.99% 0.00%
Jan. 27, 2025 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T Chairman and CEO F Common Stock 5281 $76.19 164,014.8740 32,299,999 3.12% 0.02%
Jan. 27, 2025 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T Chairman and CEO M Common Stock 9549 $0.00 169,295.8740 32,299,999 5.98% 0.03%
Jan. 27, 2025 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T Chairman and CEO M Deferred Restricted Stock Units (DRSUs) 9549 $0.00 63,253.0000 32,299,999 13.12% 0.03%
Jan. 24, 2025 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T Chairman and CEO M Common Stock 11124 $0.00 165,898.8740 32,299,999 7.19% 0.03%
Jan. 24, 2025 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T Chairman and CEO F Common Stock 6152 $75.68 159,746.8740 32,299,999 3.71% 0.02%
Jan. 24, 2025 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T Chairman and CEO M Deferred Restricted Stock Units (DRSUs) 11124 $0.00 72,802.0000 32,299,999 13.25% 0.03%
Jan. 23, 2025 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T Chairman and CEO M Deferred Restricted Stock Units (DRSUs) 11017 $0.00 83,926.0000 32,299,999 11.60% 0.03%
Jan. 23, 2025 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T Chairman and CEO M Common Stock 11017 $0.00 160,903.8740 32,299,999 7.35% 0.03%
Jan. 23, 2025 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T Chairman and CEO F Common Stock 6129 $75.65 154,774.8740 32,299,999 3.81% 0.02%
Jan. 21, 2025 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T Chairman and CEO A Deferred Restricted Stock Units (DRSUs) 30098 $0.00 94,943.0000 32,299,999 46.42% 0.09%
Jan. 21, 2025 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T Chairman and CEO A Employee Stock Option (Right to Buy) 25848 $0.00 25,848.0000 32,299,999 9999.99% 0.08%
May 28, 2024 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T Chairman and CEO M Employee Stock Option (Right to Buy) 12010 $0.00 2,010.0000 32,600,000 85.66% 0.04%
May 29, 2024 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T Chairman and CEO M Employee Stock Option (Right to Buy) 22968 $0.00 0.0000 32,600,000 100.00% 0.07%
May 29, 2024 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T Chairman and CEO M Employee Stock Option (Right to Buy) 2010 $0.00 0.0000 32,600,000 100.00% 0.01%
May 29, 2024 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T Chairman and CEO S Common Stock 24978 $84.18 149,825.4930 32,600,000 14.29% 0.08%
May 29, 2024 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T Chairman and CEO M Common Stock 22968 $38.29 174,803.4930 32,600,000 15.13% 0.07%
May 29, 2024 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T Chairman and CEO M Common Stock 2010 $60.19 151,835.4930 32,600,000 1.34% 0.01%
May 28, 2024 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T Chairman and CEO S Common Stock 12010 $84.85 149,825.4930 32,600,000 7.42% 0.04%
May 28, 2024 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T Chairman and CEO M Common Stock 12010 $60.19 161,835.4930 32,600,000 8.02% 0.04%
Jan. 26, 2024 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T Chairman and CEO M Deferred Restricted Stock Units (DRSUs) 9697 $0.00 64,845.0000 32,600,000 13.01% 0.03%
Jan. 26, 2024 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T Chairman and CEO F Common Stock 5363 $66.51 149,642.0850 32,600,000 3.46% 0.02%
Jan. 26, 2024 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T Chairman and CEO M Common Stock 9697 $0.00 155,005.0850 32,600,000 6.67% 0.03%
Jan. 25, 2024 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T Chairman and CEO M Common Stock 9550 $0.00 150,590.0850 32,600,000 6.77% 0.03%
Jan. 25, 2024 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T Chairman and CEO F Common Stock 5282 $66.09 145,308.0850 32,600,000 3.51% 0.02%
Jan. 25, 2024 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T Chairman and CEO M Deferred Restricted Stock Units (DRSUs) 9550 $0.00 74,542.0000 32,600,000 11.36% 0.03%
Jan. 24, 2024 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T Chairman and CEO M Deferred Restricted Stock Units (DRSUs) 11124 $0.00 84,092.0000 32,600,000 11.68% 0.03%
Jan. 24, 2024 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T Chairman and CEO F Common Stock 6219 $66.10 141,040.0850 32,600,000 4.22% 0.02%
Jan. 24, 2024 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T Chairman and CEO M Common Stock 11124 $0.00 147,259.0850 32,600,000 8.17% 0.03%
Jan. 23, 2024 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T Chairman and CEO A Deferred Restricted Stock Units (DRSUs) 33049 $0.00 95,216.0000 32,600,000 53.16% 0.10%
Jan. 23, 2024 MINERALS TECHNOLOGIES INC $MTX DIETRICH DOUGLAS T Chairman and CEO A Employee Stock Option (Right to Buy) 28382 $0.00 28,382.0000 32,600,000 9999.99% 0.09%