MTX MINERALS TECHNOLOGIES INC Insider Trading

MTX CEO Douglas Dietrich sold 21,568 shares at $81.53 for $1,758,421.79, reducing holdings by -10.9% to 175,973 shares.

Douglas T Dietrich, Chairman and CEO of Minerals Technologies Inc, sold 21,568 shares at $81.53 on 2026-05-14 for total proceeds of $1,758,421.79, leaving him with 175,973 shares post-transaction. The sale occurred near the 52-week high of $84.34, with the stock sitting -8.3% below that high at the time of this analysis, and follows a 30-day gain of +6.3%. His 3 prior sells in his cross-ticker track record carry a 90d well-timed rate of 100.00%, with an average 90-day return of -10.0% following those sales — meaning the stock declined after each of those prior transactions. Separately, the company's fundamentals show annual revenue growth of -2.2% and a full fiscal year net loss, providing additional context for the stock's positioning near its 52-week high at the time of the sale.

MTX Group President sells 23,093 shares ($1.4M) at $61.90; retains 84,349 shares post-transaction

MONAGLE DJ III, Group President of Minerals Technologies Inc, sold 23,093 shares at $61.90 on 2025-12-29 for $1,429,523.67, reducing his holdings by 21.5% to 84,349 shares. The transaction occurred at a price 1.6% above the current market level of $60.95 but 21.5% below the 52-week high of $77.67. His cross-ticker sales track record shows a 90-day well-timed rate of 100.00% (3 prior sells), with an average 90-day return of -12.6%, indicating that when this insider has sold, the stocks subsequently declined. At MTX specifically, his prior sale on 2024-06-24 was also well-timed (30d +4.8%, 90d -12.6%), establishing a pattern at this ticker. The company's fundamentals show modest valuation (P/E of 11.70) but negative annual revenue growth (-2.4%) and modest profitability relative to the $1.9B market cap, suggesting a mature-to-declining business profile.

Director Motwani Rocky bought 370 MTX shares at $54.31 on 2025-06-16, raising stake to 1,192 shares amid -20.6% 90-day decline and $-144.0M net loss.

Director Motwani Rocky acquired 370 shares of Minerals Technologies at $54.31 during a period of material stock weakness, with the security down -20.6% over 90 days and -39.2% from its 52-week high of $88.90. The company's most recent quarterly results show a net income of $-144.0M against revenue of $491.8M, indicating substantial operational losses that may explain the recent price pressure. The purchase represents a 45.0% increase in the director's personal holdings from 822 to 1,192 shares, though the absolute position size remains modest in relation to the company's $1.7B market capitalization. Context on whether this purchase was discretionary or part of a scheduled plan would be material to interpreting whether the transaction reflects heightened conviction or is part of a programmatic commitment.

Director Kristina M Johnson buys 1,000 MTX shares at $53.79; stock down -40.4% from 52-week high, cluster buy pattern detected

Kristina M Johnson (Director) purchased 1,000 shares of Minerals Technologies at $53.79 on 2025-05-02, expanding her holdings from 400 to 1,400 shares (+250.0%). The purchase follows a period of significant stock weakness: MTX is trading at $52.98, approximately -40.4% from its 52-week high of $88.90, with a 90-day decline of -30.2%. The company faces financial headwinds, reporting negative net income of $-144,000,000.00 on quarterly revenue of $491,800,000.00, alongside negative annual revenue growth of -2.4%. The transaction coincides with a cluster buy pattern, with 2 other insiders purchasing shares within the past 14 days. However, Johnson's own cross-ticker track record shows poor timing outcomes, with zero wins in her prior open-market buys and an average 90-day return of -10.5%. Her prior purchase at MTX on 2024-05-16 exhibited the same negative pattern (30d: +1.9%, 90d: -10.5%), suggesting this latest accumulation has not been preceded by favorable outcomes from similar timing decisions.

CEO Dietrich bought 2,000 MTX shares at $51.56; stock down 40.7% from 52-week high, net income -$144.0M

DIETRICH DOUGLAS T (CHAIRMAN AND CEO) purchased 2,000 shares of MINERALS TECHNOLOGIES INC (MTX) at $51.56, bringing holdings to 161,675 shares. The purchase occurs after significant recent declines: the stock is -40.7% from its 52-week high of $88.90 and down 15.5% over the past 30 days. Fundamentally, the company posted a net loss of -$144.0M on revenue of $491.8M in the latest quarter, with annual revenue declining 2.4% year-over-year. The buy at a reduced price point following deteriorating financials warrants examination of the filing and underlying business trajectory.

CFO Erik Aldag buys 1,000 MTX shares at $50.37; stock down 40.7% from 52-week high amid $-144.0M quarterly loss.

Erik Aldag, SVP Finance and Treasury and CFO of Minerals Technologies, purchased 1,000 shares at $50.37 on 2025-04-30, increasing his holdings by 30.8% from 3,245 to 4,245 shares. The purchase occurs in a challenging context: the company reported a net loss of $-144.0M in the latest quarter, the stock has declined 40.7% from its 52-week high of $88.90, and is down 31.3% over the past 90 days. While Aldag's purchase represents a personal capital commitment, the magnitude of recent operating losses and sustained price weakness merit investor attention to the underlying drivers of the company's financial deterioration and whether the financial leadership views current valuations as attractive despite acknowledged operational headwinds.

MTX Group President MONAGLE sold 14,229 shares at $83.63 on 2024-06-24; stock down 4.8% from 52-week high of $86.75.

MONAGLE DJ III, Group President, sold 14,229 shares of Minerals Technologies Inc at $83.63, reducing his stake by 15.1% to 79,731 shares post-transaction. The stock has declined 4.8% from its 52-week high of $86.75 and is down 3.2% over the past 30 days, though it has gained 9.7% over 90 days. At the same ticker, his prior two sales on 2023-12-20 posted negative 30-day returns (-3.6% and -4.9%) but positive 90-day returns (+7.0% and +5.6%), indicating neither was well-timed on the 90-day measure. Given the company's modest 2.1% annual revenue growth, elevated P/E of 28.37, and the insider's mixed historical timing pattern at this ticker, the transaction occurs against a backdrop of recent price softness but without clear signal of fundamental deterioration.

Senior VP Jonathan J Hastings sold 21.5K MTX shares at $84.35 on 2024-06-18, reducing stake by 28.6% to 53.9K shares ($1.8M transaction).

Jonathan J Hastings sold 21,543 shares at $84.35, representing a 28.6% reduction in his MTX holdings in a single transaction. The sale occurred near the 52-week high (stock at -3.3% from $86.75 peak), following two prior sales six days earlier on 2024-06-12. At MTX specifically, his prior measured sales show mixed outcomes: his 2023-11-30 and 2024-02-20 sells resulted in positive 30- and 90-day returns (+14.2%, +14.3% and +4.7%, +16.9% respectively), indicating the stock rose after those sales, which is poorly timed for a seller. His cross-ticker track record shows an average 90-day return of +15.6% post-sale with 0.00% well-timed rate, further indicating his prior sales have generally preceded gains. This transaction's placement near the 52-week high and repeated selling activity at MTX within days warrant monitoring for any emerging operational or strategic concerns at the company.

SVP Jonathan Hastings sells 8,964 shares for $765,679.37; holds 53,862 post-transaction.

Jonathan Hastings, Senior Vice President of Minerals Technologies, executed 2 separate sales totaling 8,964 shares for $765,679.37 on 2024-06-12 at a blended average price of $85.42, reducing his holdings by 14.3% to 53,862 shares. At the time of sale, the stock was trading near its 52-week high of $86.75 (the transaction occurred at $85.42, just 1.9% below the peak). His prior sell on 2024-05-21 at the same ticker has not yet reached measurable 30-day or 90-day return outcomes, while his two completed prior sales at MTX generated positive 90-day returns (16.9% and 14.3%), indicating those earlier exits preceded stock appreciation rather than declines. The cross-ticker track record shows a 0.00% well-timed rate across 3 prior sells, meaning none of those sales were followed by stock declines within 90 days; on average they were followed by +15.6% returns over 90 days. The sale occurs against a backdrop of modest fundamentals (P/E of 28.34, annual revenue growth of 2.1%, and recent quarterly net income of $46,700,000.00 against revenue of $534,500,000.00) and current price of $82.48, which is 3.4% below the transaction price.