Insider · CIK 0001836524
Michael S. Turner
Files at MASS (908 Devices Inc.), HAWK (HawkEye 360, Inc.). First filing Feb 4, 2025, latest Sep 17, 2026.
In brief
Michael S. Turner files SEC Form 4 as officer at MASS (908 Devices Inc.), and also at HAWK (HawkEye 360, Inc.). Since Feb 4, 2025, Michael S. Turner has reported 0 open-market buys worth $0 and 3 open-market sells worth $638k, the latest filed on Sep 17, 2026.
A track record needs three past buys with six months of prices behind them; Michael S. Turner has 0, so none is measured yet.
The newest scored trade: sold $431k of HAWK on Sep 15, 2026, filed Sep 17, 2026, scored 32 (weak), under a 10b5-1 plan. In the last 12 months: 0 buys worth $0 and 1 sell worth $431k.
Where the trades landed
Last year at the 2 companies this insider has traded most, with each buy and sell on the bar it happened.
MASS: 908 Devices 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™
HAWK: HawkEye 360, 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 |
|---|---|---|---|---|---|
| 32Weak | HawkEye 360, Inc. | $431k 26,506 shares | -13% | - | |
| 35Weak | 908 Devices Inc. | $185k 24,603 shares | -100% | +282% from low-2% from high | |
| 25Weak | 908 Devices Inc. | $22k 9,672 shares | -28% | - |
Planned sales
Form 144 notices this insider filed before selling restricted or control stock, newest first.
| Filed | Company | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| Sep 15, 2026 | HAWK HawkEye 360, Inc. | 26,506 0.03% of outstanding | $434k | Sep 15, 2026 | none |
| Jun 16, 2025 | MASS 908 DEVICES INC. | 24,603 0.07% of outstanding | $180k | Jun 16, 2025 | none |
Transactions
Every row this insider has filed, 16 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 15, 2026 | HAWK HawkEye 360, Inc. | SOpen-market sale Common Stock10b5-1 | -8,250 | $16.29 | $134k | 197,777 | 26 d ago |
| Sep 16, 2026 | HAWK HawkEye 360, Inc. | SOpen-market sale Common Stock10b5-1 | -18,256 | $16.24 | $296k | 179,521 | 26 d ago |
| Jun 16, 2025 | MASS 908 Devices Inc. | SOpen-market sale Common Stock10b5-1 | -16,082 | $7.51 | $121k | 8,521 | Jun 18, 2025 |
| Jun 17, 2025 | MASS 908 Devices Inc. | SOpen-market sale Common Stock10b5-1 | -7,148 | $7.51 | $54k | 1,373 | Jun 18, 2025 |
| Jun 18, 2025 | MASS 908 Devices Inc. | SOpen-market sale Common Stock10b5-1 | -1,373 | $7.50 | $10k | 0 | Jun 18, 2025 |
| Mar 3, 2025 | MASS 908 Devices Inc. | AGrant or award Stock Option (option to buy)derivative | +57,111 | $0.00 | $0 | 57,111 | Mar 5, 2025 |
| Mar 3, 2025 | MASS 908 Devices Inc. | AGrant or award Restricted Stock Unitsderivative | +125,470 | $0.00 | $0 | 125,470 | Mar 5, 2025 |
| Feb 1, 2025 | MASS 908 Devices Inc. | MOption exercise Common Stock | +4,427 | - | - | 13,532 | Feb 4, 2025 |
| Feb 1, 2025 | MASS 908 Devices Inc. | MOption exercise Common Stock | +9,909 | - | - | 23,441 | Feb 4, 2025 |
| Feb 1, 2025 | MASS 908 Devices Inc. | MOption exercise Common Stock | +10,834 | - | - | 34,275 | Feb 4, 2025 |
| Feb 3, 2025 | MASS 908 Devices Inc. | SOpen-market sale Common Stock | -1,703 | $2.36 | $4,014 | 32,572 | Feb 4, 2025 |
| Feb 3, 2025 | MASS 908 Devices Inc. | SOpen-market sale Common Stock | -3,807 | $2.32 | $8,831 | 28,765 | Feb 4, 2025 |
| Feb 3, 2025 | MASS 908 Devices Inc. | SOpen-market sale Common Stock | -4,162 | $2.32 | $9,654 | 24,603 | Feb 4, 2025 |
| Feb 1, 2025 | MASS 908 Devices Inc. | MOption exercise Restricted Stock Unitsderivative | -4,427 | $0.00 | $0 | 4,427 | Feb 4, 2025 |
| Feb 1, 2025 | MASS 908 Devices Inc. | MOption exercise Restricted Stock Unitsderivative | -9,909 | $0.00 | $0 | 19,819 | Feb 4, 2025 |
| Feb 1, 2025 | MASS 908 Devices Inc. | MOption exercise Restricted Stock Unitsderivative | -10,834 | $0.00 | $0 | 32,500 | Feb 4, 2025 |
Questions about Michael S. Turner
Answered from the filings on this page, as of the latest one.
Is Michael S. Turner buying or selling?
In the last 12 months Michael S. Turner reported 0 open-market buys worth $0 and 1 open-market sell worth $431k on SEC Form 4; the latest was sold $431k of HAWK on Sep 15, 2026. Grants, option exercises and tax withholding are not counted.
How did Michael S. Turner's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Michael S. Turner has 0.
Where does Michael S. Turner file Form 4?
Michael S. Turner has filed Form 4 at MASS (908 Devices Inc.) as Chief Legal & Admin Officer; HAWK (HawkEye 360, Inc.) as Chief Legal Officer. 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.