Michael Alexander Smith
Insider
First SEC filing: July 9, 2021 · Latest: June 5, 2026
Insider at
Insider transactions
0 buys (P)
20 sells (S)
Net: $-13,997,738
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| June 22, 2026 | INSM | S 10b5-1 | 1,806 | $95.82 | $173,051 | 37,648 Direct | -4.58% | Disposed | 16.0% (price as of 2026-10-02) |
| June 3, 2026 | INSM | S | 2,159 | $102.27 | $220,801 | 39,454 Direct | -5.19% | Disposed | 8.7% (price as of 2026-10-02) |
| May 22, 2026 | INSM | S 10b5-1 | 6,149 | $108.47 | $666,982 | 41,613 Direct | -12.87% | Disposed | 2.4% (price as of 2026-10-02) |
| May 13, 2026 | INSM | S | 4,109 | $116.18 | $477,384 | 47,762 Direct | -7.92% | Disposed | -4.4% (price as of 2026-10-02) |
| March 30, 2026 | INSM | M 10b5-1 | 5,649 | $17.07 | $96,428 | 57,520 Direct | +10.89% | Acquired | 551.0% (price as of 2026-10-02) |
| March 30, 2026 | INSM | M 10b5-1 | 13,989 | $27.89 | $390,153 | 71,509 Direct | +24.32% | Acquired | 298.4% (price as of 2026-10-02) |
| March 30, 2026 | INSM | S 10b5-1 | 19,638 | $150.98 | $2,964,945 | 51,871 Direct | -27.46% | Disposed | -26.4% (price as of 2026-10-02) |
| March 30, 2026 | INSM | M 10b5-1 | 5,649 | · | · | 8,633 Direct | -39.55% | Disposed | (price as of 2026-10-02) |
| March 30, 2026 | INSM | M 10b5-1 | 13,989 | · | · | 18,561 Direct | -42.98% | Disposed | (price as of 2026-10-02) |
| Feb. 24, 2026 | INSM | M 10b5-1 | 20,248 | $17.07 | $345,633 | 76,645 Direct | +35.90% | Acquired | 551.0% (price as of 2026-10-02) |
| Feb. 24, 2026 | INSM | S 10b5-1 | 4,852 | $153.93 | $746,868 | 71,793 Direct | -6.33% | Disposed | -27.8% (price as of 2026-10-02) |
| Feb. 24, 2026 | INSM | S 10b5-1 | 4,151 | $155.06 | $643,654 | 67,642 Direct | -5.78% | Disposed | -28.3% (price as of 2026-10-02) |
| Feb. 24, 2026 | INSM | S 10b5-1 | 15,771 | $156.53 | $2,468,635 | 51,871 Direct | -23.32% | Disposed | -29.0% (price as of 2026-10-02) |
| Feb. 24, 2026 | INSM | M 10b5-1 | 20,248 | · | · | 14,282 Direct | -58.64% | Disposed | (price as of 2026-10-02) |
| Feb. 3, 2026 | INSM | S | 640 | $156.27 | $100,013 | 56,397 Direct | -1.12% | Disposed | -28.9% (price as of 2026-10-02) |
| Jan. 8, 2026 | INSM | S | 1,053 | $174.17 | $183,401 | 57,037 Direct | -1.81% | Disposed | -36.2% (price as of 2026-10-02) |
| Jan. 7, 2026 | INSM | S | 709 | $175.07 | $124,125 | 58,090 Direct | -1.21% | Disposed | -36.5% (price as of 2026-10-02) |
| Jan. 6, 2026 | INSM | S | 1,396 | $173.33 | $241,969 | 58,799 Direct | -2.32% | Disposed | -35.9% (price as of 2026-10-02) |
| Jan. 2, 2026 | INSM | A | 5,293 | · | · | 60,195 Direct | +9.64% | Acquired | (price as of 2026-10-02) |
| Jan. 2, 2026 | INSM | A | 27,600 | · | · | 27,600 Direct | · | Acquired | (price as of 2026-10-02) |
| Nov. 3, 2025 | INSM | M 10b5-1 | 27,130 | $23.75 | $644,338 | 82,032 Direct | +49.42% | Acquired | 367.9% (price as of 2026-10-02) |
| Nov. 3, 2025 | INSM | S 10b5-1 | 1,342 | $181.01 | $242,915 | 80,690 Direct | -1.64% | Disposed | -38.6% (price as of 2026-10-02) |
| Nov. 3, 2025 | INSM | S 10b5-1 | 7,619 | $181.88 | $1,385,744 | 73,071 Direct | -9.44% | Disposed | -38.9% (price as of 2026-10-02) |
| Nov. 3, 2025 | INSM | S 10b5-1 | 4,286 | $182.60 | $782,624 | 68,785 Direct | -5.87% | Disposed | -39.1% (price as of 2026-10-02) |
| Nov. 3, 2025 | INSM | S 10b5-1 | 4,032 | $183.92 | $741,565 | 64,753 Direct | -5.86% | Disposed | -39.6% (price as of 2026-10-02) |
| Nov. 3, 2025 | INSM | S 10b5-1 | 3,243 | $184.91 | $599,663 | 61,510 Direct | -5.01% | Disposed | -39.9% (price as of 2026-10-02) |
| Nov. 3, 2025 | INSM | S 10b5-1 | 3,636 | $185.93 | $676,041 | 57,874 Direct | -5.91% | Disposed | -40.2% (price as of 2026-10-02) |
| Nov. 3, 2025 | INSM | S 10b5-1 | 1,572 | $187.15 | $294,200 | 56,302 Direct | -2.72% | Disposed | -40.6% (price as of 2026-10-02) |
| Nov. 3, 2025 | INSM | S 10b5-1 | 1,400 | $187.97 | $263,158 | 54,902 Direct | -2.49% | Disposed | -40.9% (price as of 2026-10-02) |
| Nov. 3, 2025 | INSM | M 10b5-1 | 27,130 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Sept. 2, 2025 | INSM | M 10b5-1 | 12,780 | $30.46 | $389,279 | 79,174 Direct | +19.25% | Acquired | 264.8% (price as of 2026-10-02) |
| Sept. 2, 2025 | INSM | S 10b5-1 | 1,354 | $141.16 | $191,131 | 77,820 Direct | -1.71% | Disposed | -21.3% (price as of 2026-10-02) |
| Sept. 2, 2025 | INSM | S 10b5-1 | 1,100 | $142.06 | $156,266 | 76,720 Direct | -1.41% | Disposed | -21.8% (price as of 2026-10-02) |
| Sept. 2, 2025 | INSM | S 10b5-1 | 7,391 | $143.16 | $1,058,096 | 69,329 Direct | -9.63% | Disposed | -22.4% (price as of 2026-10-02) |
| Sept. 2, 2025 | INSM | S 10b5-1 | 8,300 | $144.16 | $1,196,528 | 61,029 Direct | -11.97% | Disposed | -22.9% (price as of 2026-10-02) |
| Sept. 2, 2025 | INSM | S 10b5-1 | 4,944 | $145.18 | $717,770 | 56,085 Direct | -8.10% | Disposed | -23.5% (price as of 2026-10-02) |
| Sept. 2, 2025 | INSM | S 10b5-1 | 1,183 | $145.89 | $172,588 | 54,902 Direct | -2.11% | Disposed | -23.8% (price as of 2026-10-02) |
| Sept. 2, 2025 | INSM | M 10b5-1 | 12,780 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| July 15, 2025 | INSM | S 10b5-1 | 933 | $102.51 | $95,642 | 66,394 Direct | -1.39% | Disposed | 8.4% (price as of 2026-10-02) |
| July 11, 2025 | INSM | S | 748 | $96.41 | $72,115 | 67,327 Direct | -1.10% | Disposed | 15.3% (price as of 2026-10-02) |
| June 5, 2025 | INSM | S 10b5-1 | 1,879 | $73.50 | $138,106 | 67,718 Direct | -2.70% | Disposed | 51.2% (price as of 2026-10-02) |
| June 3, 2025 | INSM | S | 1,448 | $71.50 | $103,532 | 69,597 Direct | -2.04% | Disposed | 55.4% (price as of 2026-10-02) |
| May 30, 2025 | INSM | S 10b5-1 | 6,327 | $68.56 | $433,779 | 91,045 Direct | -6.50% | Disposed | 62.1% (price as of 2026-10-02) |
| May 30, 2025 | INSM | S 10b5-1 | 20,000 | $70.00 | $1,400,000 | 71,045 Direct | -21.97% | Disposed | 58.7% (price as of 2026-10-02) |
| May 15, 2025 | INSM | A | 5,578 | · | · | 97,372 Direct | +6.08% | Acquired | (price as of 2026-10-02) |
| May 15, 2025 | INSM | A | 27,100 | · | · | 27,100 Direct | · | Acquired | (price as of 2026-10-02) |
| May 14, 2025 | INSM | S | 409 | $65.61 | $26,834 | 91,794 Direct | -0.44% | Disposed | 69.4% (price as of 2026-10-02) |
| May 13, 2025 | INSM | S | 4,407 | $67.81 | $298,839 | 92,203 Direct | -4.56% | Disposed | 63.9% (price as of 2026-10-02) |
| Feb. 6, 2025 | INSM | S | 20,650 | $80.90 | $1,670,585 | 96,610 Direct | -17.61% | Disposed | 37.4% (price as of 2026-10-02) |
| Feb. 5, 2025 | INSM | A | 47,295 | · | · | 117,260 Direct | +67.60% | Acquired | (price as of 2026-10-02) |
| Jan. 10, 2025 | INSM | S | 319 | $63.38 | $20,218 | 69,965 Direct | -0.45% | Disposed | 75.3% (price as of 2026-10-02) |
| Jan. 8, 2025 | INSM | S | 1,064 | $66.21 | $70,447 | 64,578 Direct | -1.62% | Disposed | 67.8% (price as of 2026-10-02) |
| Jan. 8, 2025 | INSM | A | 5,706 | · | · | 70,284 Direct | +8.84% | Acquired | (price as of 2026-10-02) |
| Jan. 8, 2025 | INSM | A | 27,370 | · | · | 27,370 Direct | · | Acquired | (price as of 2026-10-02) |
| Jan. 7, 2025 | INSM | S | 2,306 | $65.98 | $152,150 | 65,642 Direct | -3.39% | Disposed | 68.4% (price as of 2026-10-02) |
| Sept. 13, 2024 | INSM | M 10b5-1 | 7,000 | $22.76 | $159,320 | 95,727 Direct | +7.89% | Acquired | 388.2% (price as of 2026-10-02) |
| Sept. 13, 2024 | INSM | S 10b5-1 | 18,871 | $74.16 | $1,399,473 | 76,856 Direct | -19.71% | Disposed | 49.8% (price as of 2026-10-02) |
| Sept. 13, 2024 | INSM | S 10b5-1 | 9,000 | $74.75 | $672,750 | 67,856 Direct | -11.71% | Disposed | 48.7% (price as of 2026-10-02) |
| Sept. 13, 2024 | INSM | M 10b5-1 | 7,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Aug. 12, 2024 | INSM | M | 11,900 | $17.16 | $204,204 | 100,627 Direct | +13.41% | Acquired | 547.6% (price as of 2026-10-02) |
| Aug. 12, 2024 | INSM | M | 41,640 | $13.91 | $579,212 | 142,267 Direct | +41.38% | Acquired | 698.8% (price as of 2026-10-02) |
| Aug. 12, 2024 | INSM | M | 34,530 | $17.07 | $589,427 | 176,797 Direct | +24.27% | Acquired | 551.0% (price as of 2026-10-02) |
| Aug. 12, 2024 | INSM | S | 67,655 | $72.75 | $4,921,901 | 109,142 Direct | -38.27% | Disposed | 52.7% (price as of 2026-10-02) |
| Aug. 12, 2024 | INSM | S | 20,415 | $73.65 | $1,503,565 | 88,727 Direct | -18.70% | Disposed | 50.9% (price as of 2026-10-02) |
| Aug. 12, 2024 | INSM | M | 11,900 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Aug. 12, 2024 | INSM | M | 41,640 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Aug. 12, 2024 | INSM | M | 34,530 | · | · | 34,530 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| July 8, 2024 | INSM | F | 730 | $70.05 | $51,136 | 88,727 Direct | -0.82% | Disposed | 58.6% (price as of 2026-10-02) |
| May 28, 2024 | INSM | M 10b5-1 | 7,000 | $16.07 | $112,490 | 101,579 Direct | +7.40% | Acquired | 591.5% (price as of 2026-10-02) |
| May 28, 2024 | INSM | M 10b5-1 | 10,000 | $16.16 | $161,600 | 111,579 Direct | +9.84% | Acquired | 587.6% (price as of 2026-10-02) |
| May 28, 2024 | INSM | M 10b5-1 | 3,691 | $10.85 | $40,047 | 115,270 Direct | +3.31% | Acquired | 924.1% (price as of 2026-10-02) |
| May 28, 2024 | INSM | M 10b5-1 | 3,470 | $11.38 | $39,489 | 118,740 Direct | +3.01% | Acquired | 876.4% (price as of 2026-10-02) |
| May 28, 2024 | INSM | M 10b5-1 | 14,810 | $13.67 | $202,453 | 133,550 Direct | +12.47% | Acquired | 712.9% (price as of 2026-10-02) |
| May 28, 2024 | INSM | S 10b5-1 | 44,722 | $49.53 | $2,215,081 | 88,828 Direct | -33.49% | Disposed | 124.3% (price as of 2026-10-02) |
| May 28, 2024 | INSM | M 10b5-1 | 7,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| May 28, 2024 | INSM | M 10b5-1 | 10,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| May 28, 2024 | INSM | M 10b5-1 | 3,691 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| May 28, 2024 | INSM | M 10b5-1 | 3,470 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| May 28, 2024 | INSM | M 10b5-1 | 14,810 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| May 14, 2024 | INSM | S | 5,093 | $25.40 | $129,362 | 94,579 Direct | -5.11% | Disposed | 337.5% (price as of 2026-10-02) |
| May 13, 2024 | INSM | A | 13,308 | · | · | 99,672 Direct | +15.41% | Acquired | (price as of 2026-10-02) |
| May 13, 2024 | INSM | A | 65,230 | · | · | 65,230 Direct | · | Acquired | (price as of 2026-10-02) |
| Jan. 9, 2024 | INSM | S | 2,373 | $28.76 | $68,247 | 86,364 Direct | -2.67% | Disposed | 286.4% (price as of 2026-10-02) |
| Jan. 5, 2024 | INSM | S | 627 | $29.30 | $18,371 | 88,737 Direct | -0.70% | Disposed | 279.2% (price as of 2026-10-02) |
| Jan. 4, 2024 | INSM | A | 11,800 | · | · | 89,364 Direct | +15.21% | Acquired | (price as of 2026-10-02) |
| Jan. 4, 2024 | INSM | A | 58,260 | · | · | 58,260 Direct | · | Acquired | (price as of 2026-10-02) |
| July 11, 2023 | INSM | S | 740 | $20.18 | $14,933 | 77,142 Direct | -0.95% | Disposed | 450.6% (price as of 2026-10-02) |
| May 17, 2023 | INSM | S | 1,263 | $18.18 | $22,961 | 77,082 Direct | -1.61% | Disposed | 511.2% (price as of 2026-10-02) |
| May 16, 2023 | INSM | S | 475 | $18.43 | $8,754 | 78,345 Direct | -0.60% | Disposed | 502.9% (price as of 2026-10-02) |
| May 15, 2023 | INSM | S | 1,897 | $19.24 | $36,498 | 78,820 Direct | -2.35% | Disposed | 477.5% (price as of 2026-10-02) |
| May 11, 2023 | INSM | A | 26,385 | · | · | 80,717 Direct | +48.56% | Acquired | (price as of 2026-10-02) |
| May 11, 2023 | INSM | A | 121,850 | · | · | 121,850 Direct | · | Acquired | (price as of 2026-10-02) |
| Jan. 10, 2023 | INSM | S | 1,836 | $17.93 | $32,919 | 54,332 Direct | -3.27% | Disposed | 519.7% (price as of 2026-10-02) |
| Jan. 5, 2023 | INSM | S | 720 | $19.72 | $14,198 | 49,836 Direct | -1.42% | Disposed | 463.5% (price as of 2026-10-02) |
| Jan. 5, 2023 | INSM | A | 6,332 | · | · | 56,168 Direct | +12.71% | Acquired | (price as of 2026-10-02) |
| Jan. 5, 2023 | INSM | A | 29,050 | · | · | 29,050 Direct | · | Acquired | (price as of 2026-10-02) |
| July 12, 2022 | INSM | S | 941 | $23.40 | $22,019 | 50,455 Direct | -1.83% | Disposed | 374.9% (price as of 2026-10-02) |
| May 17, 2022 | INSM | S | 1,055 | $20.37 | $21,490 | 50,583 Direct | -2.04% | Disposed | 445.5% (price as of 2026-10-02) |
| May 16, 2022 | INSM | S | 433 | $18.48 | $8,002 | 51,638 Direct | -0.83% | Disposed | 501.3% (price as of 2026-10-02) |
| May 11, 2022 | INSM | A | 69,060 | · | · | 69,060 Direct | · | Acquired | (price as of 2026-10-02) |
Showing latest 100 of 108 transactions
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II) Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| March 30, 2026 | INSM | Stock Option (right to buy) | Common Stock | $17.07 | May 11, 2032 | 5,649 | Disposed |
| March 30, 2026 | INSM | Stock Option (right to buy) | Common Stock | $27.89 | July 8, 2031 | 13,989 | Disposed |
| Feb. 24, 2026 | INSM | Stock Option (right to buy) | Common Stock | $17.07 | May 11, 2032 | 20,248 | Disposed |
| Jan. 2, 2026 | INSM | Stock Option (right to buy) | Common Stock | $177.12 | Jan. 2, 2036 | 27,600 | Acquired |
| Nov. 3, 2025 | INSM | Stock Option (right to buy) | Common Stock | $23.75 | Jan. 3, 2030 | 27,130 | Disposed |
| Sept. 2, 2025 | INSM | Stock Option (right to buy) | Common Stock | $30.46 | Jan. 4, 2028 | 12,780 | Disposed |
| May 15, 2025 | INSM | Stock Option (right to buy) | Common Stock | $67.22 | May 15, 2035 | 27,100 | Acquired |
| Jan. 8, 2025 | INSM | Stock Option (right to buy) | Common Stock | $65.72 | Jan. 8, 2035 | 27,370 | Acquired |
| Sept. 13, 2024 | INSM | Stock Option (right to buy) | Common Stock | $22.76 | May 21, 2025 | 7,000 | Disposed |
| Aug. 12, 2024 | INSM | Stock Option (right to buy) | Common Stock | $17.16 | May 17, 2027 | 11,900 | Disposed |
| Aug. 12, 2024 | INSM | Stock Option (right to buy) | Common Stock | $13.91 | Jan. 3, 2029 | 41,640 | Disposed |
| Aug. 12, 2024 | INSM | Stock Option (right to buy) | Common Stock | $17.07 | May 11, 2032 | 34,530 | Disposed |
| May 28, 2024 | INSM | Stock Option (right to buy) | Common Stock | $16.07 | Jan. 8, 2025 | 7,000 | Disposed |
| May 28, 2024 | INSM | Stock Option (right to buy) | Common Stock | $16.16 | Jan. 7, 2026 | 10,000 | Disposed |
| May 28, 2024 | INSM | Stock Option (right to buy) | Common Stock | $10.85 | May 19, 2026 | 3,691 | Disposed |
| May 28, 2024 | INSM | Stock Option (right to buy) | Common Stock | $11.38 | Aug. 2, 2026 | 3,470 | Disposed |
| May 28, 2024 | INSM | Stock Option (right to buy) | Common Stock | $13.67 | Jan. 5, 2027 | 14,810 | Disposed |
| May 13, 2024 | INSM | Stock Option (right to buy) | Common Stock | $25.83 | May 13, 2034 | 65,230 | Acquired |
| Jan. 4, 2024 | INSM | Stock Option (right to buy) | Common Stock | $29.13 | Jan. 4, 2034 | 58,260 | Acquired |
| May 11, 2023 | INSM | Stock Option (right to buy) | Common Stock | $18.95 | May 11, 2033 | 121,850 | Acquired |
| Jan. 5, 2023 | INSM | Stock Option (right to buy) | Common Stock | $19.74 | Jan. 5, 2033 | 29,050 | Acquired |
| May 11, 2022 | INSM | Stock Option (right to buy) | Common Stock | $17.07 | May 11, 2032 | 69,060 | Acquired |
| Jan. 6, 2022 | INSM | Stock Option (right to buy) | Common Stock | $26.43 | Jan. 6, 2032 | 45,700 | Acquired |
| July 8, 2021 | INSM | Stock Option (right to buy) | Common Stock | $27.89 | July 8, 2031 | 32,550 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 1 holding
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| July 9, 2021 | INSM | Common Stock | 22,506 | Direct |
Compensation (DEF 14A)
Matched by name from proxy statements (DEF 14A) — verify against the filing.
| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2025 | $595,270 | · | $749,951 | $2,250,113 | $520,862 | · | $21,964 | $4,138,160 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.