Insider · CIK 0001609305
David R Brennan
Files at INSM (INSMED Inc). First filing Sep 11, 2026, latest Sep 11, 2026.
In brief
David R Brennan files SEC Form 4 as director at INSM (INSMED Inc). Since Sep 11, 2026, David R Brennan has reported 0 open-market buys worth $0 and 1 open-market sell worth $3.1M, the latest filed on Sep 11, 2026.
A track record needs three past buys with six months of prices behind them; David R Brennan has 0, so none is measured yet.
The newest scored trade: sold $3.1M of INSM on Sep 9, 2026, filed Sep 11, 2026, scored 50 (moderate). In the last 12 months: 0 buys worth $0 and 1 sell worth $3.1M.
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
INSM: INSMED 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 |
|---|---|---|---|---|---|
| 50Moderate | INSMsell INSMED Inc | $3.1M 25,000 shares | -39% | - |
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 10, 2026 | INSM INSMED Inc | 25,000 0.01% of outstanding | $3.1M | Sep 9, 2026 | none |
Transactions
Every row this insider has filed, 6 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 9, 2026 | INSM INSMED Inc | SOpen-market sale Common Stock | -25,000 | $124.00 | $3.1M | 39,238 | 32 d ago |
| May 13, 2026 | INSM INSMED Inc | AGrant or award Common Stock | +3,305 | - | - | 64,238 | May 15, 2026 |
| Feb 23, 2026 | INSM INSMED Inc | GGift Common Stock | -6,000 | $0.00 | $0 | 60,933 | Feb 25, 2026 |
| Nov 6, 2025 | INSM INSMED Inc | GGift Common Stock | -60,000 | $0.00 | $0 | 66,933 | Nov 10, 2025 |
| Nov 6, 2025 | INSM INSMED Inc | GGift Common Stockindirect: By spouse revocable trust | +60,000 | $0.00 | $0 | 60,000 | Nov 10, 2025 |
| May 15, 2025 | INSM INSMED Inc | AGrant or award Common Stock | +5,058 | - | - | 126,933 | May 19, 2025 |
Questions about David R Brennan
Answered from the filings on this page, as of the latest one.
Is David R Brennan buying or selling?
In the last 12 months David R Brennan reported 0 open-market buys worth $0 and 1 open-market sell worth $3.1M on SEC Form 4; the latest was sold $3.1M of INSM on Sep 9, 2026. Grants, option exercises and tax withholding are not counted.
How did David R Brennan's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and David R Brennan has 0.
Where does David R Brennan file Form 4?
David R Brennan has filed Form 4 at INSM (INSMED Inc). 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.