Insider · CIK 0001977908
Charles Masters
Files at ATMU (Atmus Filtration Technologies Inc.). First filing Jun 2, 2026, latest Jun 2, 2026.
Charles Masters files SEC Form 4 as officer at ATMU (Atmus Filtration Technologies Inc.). Since Jun 2, 2026, Charles Masters has reported 0 open-market buys worth $0 and 1 open-market sell worth $131k, the latest filed on Jun 2, 2026.
A track record needs three past buys with six months of prices behind them; Charles Masters has 0, so none is measured yet.
The newest scored trade: sold $131k of ATMU on Jun 1, 2026, filed Jun 2, 2026, scored 41 (moderate). In the last 12 months: 0 buys worth $0 and 1 sell worth $131k.
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
ATMU: Atmus Filtration Technologies Inc.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 41Moderate | Atmus Filtration Technologies Inc. | $131k 2,890 shares | -6% | +31% from low-30% from high |
Transactions
Every row this insider has filed, 10 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Jun 1, 2026 | ATMU Atmus Filtration Technologies Inc. | SOpen-market sale Common Stock | -2,890 | $45.25 | $131k | 43,579 | Jun 2, 2026 |
| Apr 1, 2026 | ATMU Atmus Filtration Technologies Inc. | AGrant or award Common Stock | +4,130 | $0.00 | $0 | 46,469 | Apr 2, 2026 |
| Feb 27, 2026 | ATMU Atmus Filtration Technologies Inc. | FTax withholding Common Stock | -9,046 | $64.53 | $584k | 44,470 | Mar 3, 2026 |
| Feb 27, 2026 | ATMU Atmus Filtration Technologies Inc. | FTax withholding Common Stock | -2,131 | $64.53 | $138k | 42,339 | Mar 3, 2026 |
| Feb 13, 2026 | ATMU Atmus Filtration Technologies Inc. | AGrant or award Common Stock | +21,152 | $0.00 | $0 | 53,516 | Feb 17, 2026 |
| Oct 3, 2025 | ATMU Atmus Filtration Technologies Inc. | FTax withholding Common Stock | -28 | $44.50 | $1,246 | 32,364 | Oct 7, 2025 |
| Apr 1, 2025 | ATMU Atmus Filtration Technologies Inc. | AGrant or award Common Stock | +4,402 | $0.00 | $0 | 32,392 | Apr 3, 2025 |
| Mar 3, 2025 | ATMU Atmus Filtration Technologies Inc. | FTax withholding Common Stock | -736 | $39.80 | $29k | 28,560 | Mar 5, 2025 |
| Mar 3, 2025 | ATMU Atmus Filtration Technologies Inc. | FTax withholding Common Stock | -570 | $39.80 | $23k | 27,990 | Mar 5, 2025 |
| Feb 17, 2025 | ATMU Atmus Filtration Technologies Inc. | AGrant or award Common Stock | +2,252 | $0.00 | $0 | 29,296 | Feb 19, 2025 |
Questions about Charles Masters
Answered from the filings on this page, as of the latest one.
Is Charles Masters buying or selling?
In the last 12 months Charles Masters reported 0 open-market buys worth $0 and 1 open-market sell worth $131k on SEC Form 4; the latest was sold $131k of ATMU on Jun 1, 2026. Grants, option exercises and tax withholding are not counted.
How did Charles Masters's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Charles Masters has 0.
Where does Charles Masters file Form 4?
Charles Masters has filed Form 4 at ATMU (Atmus Filtration Technologies Inc.) as Senior Vice President. A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
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.