INSMED Inc (INSM) Insider Trading
Directors, officers and holders of more than 10% of INSM report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.
Recent Form 4 transactions
The 50 most recent of 720 transactions on file: 0 with code P, 20 with code S and 30 with other codes.
| Date | Insider | Title | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 19, 2026 | Hudson Paul | Director | A Award | 6,139 | Not measured | Not measured |
| Oct 19, 2026 | Koppikar Utpal | Director | A Award | 6,139 | Not measured | Not measured |
| Sep 9, 2026 | Brennan David R | Director | S Sale | 25,000 | $124.00 | $3,100,000 |
| Aug 17, 2026 | SHAROKY MELVIN MD | Director | S Sale | 5,000 | $127.53 | $637,650 |
| Aug 10, 2026 | Adsett Roger | Chief Operating Officer | M Exercise | 82,280 | Not measured | Not measured |
| Aug 10, 2026 | Adsett Roger | Chief Operating Officer | S Sale | 239,850 | $133.27 | $31,964,810 |
| Aug 10, 2026 | Adsett Roger | Chief Operating Officer | M Exercise | 80,970 | Not measured | Not measured |
| Aug 10, 2026 | Adsett Roger | Chief Operating Officer | M Exercise | 80,970 | $30.46 | $2,466,346 |
| Aug 10, 2026 | Adsett Roger | Chief Operating Officer | M Exercise | 76,600 | $17.16 | $1,314,456 |
| Aug 10, 2026 | Adsett Roger | Chief Operating Officer | M Exercise | 82,280 | $13.67 | $1,124,768 |
| Aug 10, 2026 | Adsett Roger | Chief Operating Officer | M Exercise | 76,600 | Not measured | Not measured |
| Aug 6, 2026 | Flammer Martina M.D. | Chief Medical Officer | S Sale | 18,278 | $129.40 | $2,365,173 |
| Aug 6, 2026 | Flammer Martina M.D. | Chief Medical Officer | M Exercise | 8,895 | Not measured | Not measured |
| Aug 6, 2026 | Flammer Martina M.D. | Chief Medical Officer | S Sale | 8,895 | $127.00 | $1,129,665 |
| Aug 6, 2026 | Flammer Martina M.D. | Chief Medical Officer | M Exercise | 18,278 | Not measured | Not measured |
| Aug 6, 2026 | Flammer Martina M.D. | Chief Medical Officer | M Exercise | 8,895 | $25.83 | $229,758 |
| Aug 6, 2026 | Flammer Martina M.D. | Chief Medical Officer | M Exercise | 18,278 | $18.95 | $346,368 |
| Jul 23, 2026 | Lewis William | Chair and CEO | M Exercise | 4,440 | $17.16 | $76,190 |
| Jul 23, 2026 | Lewis William | Chair and CEO | M Exercise | 6,260 | Not measured | Not measured |
| Jul 23, 2026 | Lewis William | Chair and CEO | M Exercise | 4,440 | Not measured | Not measured |
| Jul 23, 2026 | Lewis William | Chair and CEO | S Sale | 4,828 | $105.62 | $509,933 |
| Jul 23, 2026 | Lewis William | Chair and CEO | M Exercise | 6,260 | $30.46 | $190,680 |
| Jul 23, 2026 | Lewis William | Chair and CEO | S Sale | 5,872 | $106.43 | $624,957 |
| Jul 9, 2026 | Lewis William | Chair and CEO | M Exercise | 4,440 | $17.16 | $76,190 |
| Jul 9, 2026 | Lewis William | Chair and CEO | S Sale | 5,005 | $116.55 | $583,333 |
| Jul 9, 2026 | Lewis William | Chair and CEO | S Sale | 2,335 | $117.62 | $274,643 |
| Jul 9, 2026 | Lewis William | Chair and CEO | M Exercise | 4,440 | Not measured | Not measured |
| Jul 9, 2026 | Lewis William | Chair and CEO | M Exercise | 6,259 | Not measured | Not measured |
| Jul 9, 2026 | Lewis William | Chair and CEO | S Sale | 3,359 | $118.52 | $398,109 |
| Jul 9, 2026 | Lewis William | Chair and CEO | M Exercise | 6,259 | $30.46 | $190,649 |
| Jul 6, 2026 | Flammer Martina M.D. | Chief Medical Officer | M Exercise | 4,357 | Not measured | Not measured |
| Jul 6, 2026 | Flammer Martina M.D. | Chief Medical Officer | S Sale | 4,854 | $109.02 | $529,183 |
| Jul 6, 2026 | Flammer Martina M.D. | Chief Medical Officer | S Sale | 7,448 | $110.60 | $823,749 |
| Jul 6, 2026 | Flammer Martina M.D. | Chief Medical Officer | M Exercise | 7,945 | Not measured | Not measured |
| Jul 6, 2026 | Flammer Martina M.D. | Chief Medical Officer | M Exercise | 7,945 | $29.13 | $231,438 |
| Jul 6, 2026 | Flammer Martina M.D. | Chief Medical Officer | M Exercise | 4,357 | $19.74 | $86,007 |
| Jun 25, 2026 | Lewis William | Chair and CEO | S Sale | 3,723 | $104.28 | $388,234 |
| Jun 25, 2026 | Lewis William | Chair and CEO | S Sale | 1,836 | $103.10 | $189,292 |
| Jun 25, 2026 | Lewis William | Chair and CEO | M Exercise | 12,518 | $30.46 | $381,298 |
| Jun 25, 2026 | Lewis William | Chair and CEO | M Exercise | 8,880 | $17.16 | $152,381 |
| Jun 25, 2026 | Lewis William | Chair and CEO | S Sale | 2,456 | $105.27 | $258,543 |
| Jun 25, 2026 | Lewis William | Chair and CEO | M Exercise | 12,518 | Not measured | Not measured |
| Jun 25, 2026 | Lewis William | Chair and CEO | S Sale | 12,091 | $102.34 | $1,237,393 |
| Jun 25, 2026 | Lewis William | Chair and CEO | M Exercise | 8,880 | Not measured | Not measured |
| Jun 25, 2026 | Lewis William | Chair and CEO | S Sale | 1,292 | $106.27 | $137,301 |
| Jun 23, 2026 | Butera Samuele | SVP, GM, Global Respiratory | A Award | 12,570 | Not measured | Not measured |
| Jun 23, 2026 | Butera Samuele | SVP, GM, Global Respiratory | A Award | 7,342 | Not measured | Not measured |
| Jun 22, 2026 | Smith Michael Alexander | Chief Legal Officer | S Sale | 1,806 | $95.82 | $173,051 |
| Jun 8, 2026 | Lewis William | Chair and CEO | S Sale | 6,515 | $94.03 | $612,605 |
| Jun 5, 2026 | Flammer Martina M.D. | Chief Medical Officer | S Sale | 1,858 | $103.78 | $192,823 |
The full Form 4 history is on the INSM company page (Insider Trades card, View all).
Questions about this data
Which insider transactions are open-market trades?
Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.
How quickly are insider trades reported?
A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.
Who has to file Form 4?
Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.
Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.