ATMU Atmus Filtration Technologies Inc. Insider Trading

Director Gretchen Haggerty buys 4,592 shares (~$110K) across three open-market purchases; stock trading well below 52-week high amid recent decline.

Director Gretchen Haggerty executed three open-market purchases totaling nearly 4,600 shares on a single day while the stock trades well below its 52-week high and has declined over recent months. This is her fourth, fifth, and sixth open-market purchase at Atmus in the past three years, extending a consistent pattern of buying with no offsetting sales—she has never sold shares on the open market. Her previous purchase at this company saw the stock rise meaningfully afterward, establishing a track record of well-timed entry points. The current purchase comes as the stock remains depressed, offering her another opportunity to accumulate at lower prices, though the broader weakness over the past month suggests continued selling pressure from other market participants.

Atmus Filtration director Donoso sold 20 shares at $48.84 on 2025-11-13 (60 total sold vs 40 purchased in the filing); net -20 shares held.

Donoso Diego's Form 4 filing reveals 2 separate sales totaling 60 shares for $2,488.40 and 2 separate purchases totaling 40 shares for $1,812.15, resulting in net sales of 20 shares. The director sold 40 shares at $37.79 on 2025-04-02 when the stock was near the 52-week floor, then accumulated 40 shares at higher prices ($45.00 and $45.81) during mid-year strength, before selling an additional 20 shares at $48.84 on 2025-11-13 near the 52-week high. His post-transaction holdings of 9,078 shares represent a -0.2% reduction from prior holdings. The stock currently trades at $46.92, up 5.7% over 30 days and 11.0% over 90 days, having moved within a 52-week band of $31.66–$49.99.

ATMU Director Haggerty bought 5,848 shares at $34.20 on 2024-08-23, raising holdings 41.7% to 19.9K shares; stock near 52-week high of $34.39.

Director Gretchen R. Haggerty purchased 5,848 shares for $199,999.82 at $34.20, increasing her holdings by 41.7% from 14,033 to 19,881 shares. The transaction occurred near the 52-week high of $34.39, with the stock up 9.5% over 30 days and 15.6% over 90 days, reflecting positive recent momentum. Atmus Filtration's fundamentals show solid performance with $432.6M in latest quarterly revenue, $56.2M net income, and a P/E of 16.43, supporting a $2.9B market cap. This substantial director purchase—representing a meaningful increase in personal position size during a period of upward price movement—adds to the public shareholder base amid stable operational metrics.

ATMU Director Macadam buys 8,250 shares at $31.56; holdings rise to 32.1K (+34.6%); cross-ticker track record shows 100% 90-day win rate on 4 prior buys.

Director Stephen E. Macadam purchased 8,250 shares of Atmus Filtration Technologies at $31.56 on 2024-08-07, a discretionary open-market buy that increased his holdings by 34.6% from 23.8K to 32.1K shares, representing a $260.4K commitment. His prior two open-market purchases at ATMU (November 2023 and May 2023) both posted positive 90-day returns of +20.7% and +1.3% respectively, and across his broader cross-ticker open-market history, his four prior buy transactions achieved a 100% 90-day win rate with an average 90-day return of +4.7%, alongside an average 30-day return of +25.4%. This latest purchase comes when ATMU stock sits at $32.55 (only 2.1% below its 52-week high of $33.25) and has rallied +15.3% over the preceding 30 days, suggesting the insider is accumulating at elevated price levels rather than in a depressed market. The company's fundamentals remain solid: annual revenue growth of +4.2%, net income of $56.2M on revenue of $432.6M, and a P/E of 15.57.