Diego Donoso bought $1,812 of ATMU
director at Atmus Filtration Technologies Inc.. 40 shares at an average of $45.30, traded Aug 13, 2025, filed Nov 19, 2025.
Score components
- +15RoleDirector
- 0Trade size$2k at market
- -5Relative to holdingsUnder 1% of holdings (0.4%)
- 0Price contextNo price history yet
- 0ClusterNo other insider buying within 14 days
- 0Repeat buyingFirst buy in 90 days
- 0Track recordToo few past buys to judge (0 with prices)
What happened after comparable buys
Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.
This signal so far: 1m +14.3%, 3m +37.1%, 6m +4.6%.
Price around the trade, and since
From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™
Rows in this filing
Every transaction in Form 4 0001809708-25-000004, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Apr 2, 2025 | SOpen-market sale Common Stock | -40 | $37.79 | $1,512 | 9,038 | Nov 19, 2025 |
| Aug 13, 2025 | POpen-market purchase Common Stock | +25 | $45.00 | $1,125 | 9,063 | Nov 19, 2025 |
| Sep 5, 2025 | POpen-market purchase Common Stock | +15 | $45.81 | $687 | 9,078 | Nov 19, 2025 |
| Nov 13, 2025 | SOpen-market sale Common Stock | -20 | $48.84 | $977 | 9,058 | Nov 19, 2025 |
| Nov 18, 2025 | JOther Common Stock | +20 | $0.00 | $0 | 9,078 | Nov 19, 2025 |
Related signals
Other insiders at Atmus Filtration Technologies Inc. and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| 27Weak | ATMUsell Atmus Filtration Technologies Inc. | Renee Swan Chief People Officer | $197k 3,870 shares | -8% | |
| 32Weak | ATMUbuy Atmus Filtration Technologies Inc. | Stephen E. Macadam director | $100k 2,000 shares | +5% | |
| 65Notable | Atmus Filtration Technologies Inc. | Stephanie Disher Chief Executive Officer | $1.2M 25,652 shares | -7% | |
| 41Moderate | Atmus Filtration Technologies Inc. | Charles Masters Senior Vice President | $131k 2,890 shares | -6% | |
| 50Moderate | Atmus Filtration Technologies Inc. | Jack Kienzler Chief Financial Officer | $232k 5,132 shares | -6% | |
| 40Moderate | Atmus Filtration Technologies Inc. | Renee Swan Chief People Officer | $116k 2,566 shares | -5% | |
| 32Weak | ATMUbuy Atmus Filtration Technologies Inc. | Gretchen R Haggerty director | $110k 1,973 shares | +8% | |
| 15Weak | ATMUsell Atmus Filtration Technologies Inc. | Diego Donoso director | $2,488 60 shares | -1% | |
| 33Weak | ATMUbuy Atmus Filtration Technologies Inc. | Gretchen R Haggerty director | $200k 5,849 shares | +42% | |
| 44Moderate | ATMUbuy Atmus Filtration Technologies Inc. | Stephen E. Macadam director | $260k 8,250 shares | +35% |
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.