MONAGLE DJ III 4

What Happened

• D.J. Monagle, Group President of Minerals Technologies Inc. (MTX), converted a total of 7,314 deferred restricted stock units (DRSUs) into common shares on Jan 23 and Jan 26, 2026 (3,795 and 3,519 shares). There was no exercise price paid (conversion at $0). To satisfy tax withholding obligations, the company withheld 4,046 shares (2,099 on Jan 23 at $68.77, value $144,348; and 1,947 on Jan 26 at $68.89, value $134,129), leaving Monagle with a net increase of about 3,268 shares.

Key Details

• Transaction dates/prices:
  • Jan 23, 2026: 3,795 DRSUs converted (code M); 2,099 shares withheld @ $68.77 (code F) = $144,348 withheld.
  • Jan 26, 2026: 3,519 DRSUs converted (code M); 1,947 shares withheld @ $68.89 (code F) = $134,129 withheld.
• Total withheld value reported: $278,477; net shares received ≈ 3,268.
• Shares owned after the transactions: not specified in the provided filing.
• Footnotes: withholding by the company satisfied tax obligations (F1); report based on a Plan Statement dated Jan 21, 2026 (F2); each DRSU equals one share (F3); relevant DRSU grants and vesting schedules noted (grants on Jan 23, 2024 and Jan 24, 2023 with three-year vesting in equal annual installments - F4, F5).
• Filing/Timeliness: Form 4 filed Jan 27, 2026; transactions dated Jan 23 and Jan 26 — filing appears timely (within required business days).

Context

• These transactions reflect award vesting and conversion of DRSUs rather than open-market buys or sales. The withheld shares represent a common cashless settlement to cover tax withholding and do not necessarily indicate a voluntary sale. For investors, award vesting increases insider holdings when shares are retained, while withholding is a routine administrative step.