Sara Bonstein, Chief Financial Officer of Insmed Inc. ($INSM), sold about $24.3 million worth of company shares across 19 open market transactions in the last year. Her most recent sale occurred on February 3, 2026. These sales rank 577th among 11,678 insiders in our database, surpassing the average of $8.6 million per seller and 6.4 transactions. Bonstein made no open market purchases during this period.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feb. 3, 2026 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | S | Common Stock | 748 | $156.34 | 79,758.0000 | 213,273,469 | 0.93% | 0.00% |
| Jan. 6, 2026 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | S | Common Stock | 1517 | $173.33 | 83,631.0000 | 213,273,469 | 1.78% | 0.00% |
| Jan. 7, 2026 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | S | Common Stock | 1678 | $175.07 | 81,953.0000 | 213,273,469 | 2.01% | 0.00% |
| Jan. 8, 2026 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | S | Common Stock | 1447 | $174.17 | 80,506.0000 | 213,273,469 | 1.77% | 0.00% |
| Jan. 2, 2026 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | A | Stock Option (right to buy) | 31280 | $0.00 | 31,280.0000 | 213,273,469 | 9999.99% | 0.01% |
| Jan. 2, 2026 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | A | Common Stock | 5998 | $0.00 | 79,503.0000 | 213,273,469 | 8.16% | 0.00% |
| Jan. 2, 2026 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | A | Common Stock | 5645 | $0.00 | 85,148.0000 | 213,273,469 | 7.10% | 0.00% |
| Oct. 7, 2025 | scPharmaceuticals Inc. | $SCPH | Bonstein Sara | Not found | D | Stock Option (Right to Buy) | 16300 | $0.00 | 0.0000 | 53,719,662 | 100.00% | 0.03% |
| Oct. 7, 2025 | scPharmaceuticals Inc. | $SCPH | Bonstein Sara | Not found | D | Stock Option (Right to Buy) | 19750 | $0.00 | 0.0000 | 53,719,662 | 100.00% | 0.04% |
| Oct. 7, 2025 | scPharmaceuticals Inc. | $SCPH | Bonstein Sara | Not found | D | Stock Option (Right to Buy) | 30000 | $0.00 | 0.0000 | 53,719,662 | 100.00% | 0.06% |
| July 21, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Stock Option (right to buy) | 11455 | $0.00 | 0.0000 | 180,999,350 | 100.00% | 0.01% |
| July 21, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | S | Common Stock | 26310 | $103.03 | 73,505.0000 | 180,999,350 | 26.36% | 0.01% |
| July 21, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Stock Option (right to buy) | 3443 | $0.00 | 8,580.0000 | 180,999,350 | 28.64% | 0.00% |
| July 21, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Stock Option (right to buy) | 15890 | $0.00 | 47,670.0000 | 180,999,350 | 25.00% | 0.01% |
| July 21, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Stock Option (right to buy) | 17100 | $0.00 | 0.0000 | 180,999,350 | 100.00% | 0.01% |
| July 21, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Common Stock | 11455 | $28.88 | 98,915.0000 | 180,999,350 | 13.10% | 0.01% |
| July 21, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Common Stock | 15890 | $29.13 | 114,805.0000 | 180,999,350 | 16.06% | 0.01% |
| July 21, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Common Stock | 3443 | $26.46 | 87,460.0000 | 180,999,350 | 4.10% | 0.00% |
| July 21, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Common Stock | 17100 | $34.03 | 131,905.0000 | 180,999,350 | 14.89% | 0.01% |
| July 21, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | S | Common Stock | 32090 | $102.38 | 99,815.0000 | 180,999,350 | 24.33% | 0.02% |
| July 7, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | S | Common Stock | 22181 | $96.19 | 84,017.0000 | 180,999,350 | 20.89% | 0.01% |
| July 7, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Common Stock | 13717 | $26.46 | 141,781.0000 | 180,999,350 | 10.71% | 0.01% |
| July 7, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | S | Common Stock | 35583 | $95.66 | 106,198.0000 | 180,999,350 | 25.10% | 0.02% |
| July 7, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Common Stock | 6244 | $19.74 | 100,137.0000 | 180,999,350 | 6.65% | 0.00% |
| July 7, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Common Stock | 4362 | $24.70 | 104,499.0000 | 180,999,350 | 4.36% | 0.00% |
| July 7, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Common Stock | 23565 | $26.43 | 128,064.0000 | 180,999,350 | 22.55% | 0.01% |
| July 7, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Stock Option (right to buy) | 13717 | $0.00 | 12,023.0000 | 180,999,350 | 53.29% | 0.01% |
| July 7, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Stock Option (right to buy) | 23565 | $0.00 | 15,710.0000 | 180,999,350 | 60.00% | 0.01% |
| July 7, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Stock Option (right to buy) | 4362 | $0.00 | 0.0000 | 180,999,350 | 100.00% | 0.00% |
| July 7, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Stock Option (right to buy) | 6244 | $0.00 | 18,880.0000 | 180,999,350 | 24.85% | 0.00% |
| June 23, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Common Stock | 35253 | $18.95 | 138,665.0000 | 180,999,350 | 34.09% | 0.02% |
| June 23, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Common Stock | 12636 | $19.74 | 151,301.0000 | 180,999,350 | 9.11% | 0.01% |
| June 23, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | S | Common Stock | 49104 | $101.71 | 102,197.0000 | 180,999,350 | 32.45% | 0.03% |
| June 23, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | S | Common Stock | 8661 | $102.15 | 93,536.0000 | 180,999,350 | 8.47% | 0.00% |
| June 23, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Stock Option (right to buy) | 35253 | $0.00 | 99,007.0000 | 180,999,350 | 26.26% | 0.02% |
| June 23, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Stock Option (right to buy) | 12636 | $0.00 | 25,124.0000 | 180,999,350 | 33.46% | 0.01% |
| June 10, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Common Stock | 24150 | $18.95 | 137,438.0000 | 180,999,350 | 21.32% | 0.01% |
| June 10, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Stock Option (right to buy) | 23740 | $0.00 | 35,610.0000 | 180,999,350 | 40.00% | 0.01% |
| June 10, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Stock Option (right to buy) | 24150 | $0.00 | 134,260.0000 | 180,999,350 | 15.25% | 0.01% |
| June 10, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | S | Common Stock | 100 | $91.66 | 103,412.0000 | 180,999,350 | 0.10% | 0.00% |
| June 11, 2025 | Xilio Therapeutics, Inc. | $XLO | Bonstein Sara | Not found | A | Stock Option (right to buy) | 31000 | $0.00 | 31,000.0000 | 63,465,063 | 9999.99% | 0.05% |
| June 10, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | S | Common Stock | 6328 | $90.93 | 103,512.0000 | 180,999,350 | 5.76% | 0.00% |
| June 10, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | S | Common Stock | 15825 | $89.85 | 109,840.0000 | 180,999,350 | 12.59% | 0.01% |
| June 10, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | S | Common Stock | 20926 | $88.99 | 125,665.0000 | 180,999,350 | 14.28% | 0.01% |
| June 10, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | S | Common Stock | 7310 | $88.29 | 146,591.0000 | 180,999,350 | 4.75% | 0.00% |
| June 10, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | S | Common Stock | 7277 | $87.12 | 153,901.0000 | 180,999,350 | 4.51% | 0.00% |
| June 10, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Common Stock | 23740 | $17.07 | 161,178.0000 | 180,999,350 | 17.27% | 0.01% |
| June 3, 2025 | scPharmaceuticals Inc. | $SCPH | Bonstein Sara | Not found | A | Stock Option (Right to Buy) | 30000 | $0.00 | 30,000.0000 | 44,519,669 | 9999.99% | 0.07% |
| June 3, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | S | Common Stock | 1579 | $71.50 | 113,288.0000 | 180,999,350 | 1.37% | 0.00% |
| May 15, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | A | Common Stock | 6508 | $0.00 | 114,867.0000 | 180,999,350 | 6.01% | 0.00% |
| May 15, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | A | Stock Option (right to buy) | 31610 | $0.00 | 31,610.0000 | 180,999,350 | 9999.99% | 0.02% |
| May 13, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | S | Common Stock | 8870 | $67.81 | 109,993.0000 | 180,999,350 | 7.46% | 0.00% |
| May 14, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | S | Common Stock | 1634 | $65.61 | 108,359.0000 | 180,999,350 | 1.49% | 0.00% |
| Feb. 18, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | S | Common Stock | 17622 | $80.28 | 119,563.0000 | 180,999,350 | 12.85% | 0.01% |
| Feb. 18, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | S | Common Stock | 700 | $81.00 | 118,863.0000 | 180,999,350 | 0.59% | 0.00% |
| Feb. 11, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | S | Common Stock | 13302 | $80.00 | 142,204.0000 | 0 | 8.55% | 0.00% |
| Feb. 12, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | S | Common Stock | 5019 | $80.00 | 137,185.0000 | 0 | 3.53% | 0.00% |
| Feb. 5, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | A | Common Stock | 65033 | $0.00 | 183,896.0000 | 0 | 54.71% | 0.00% |
| Feb. 6, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | S | Common Stock | 28390 | $80.90 | 155,506.0000 | 0 | 15.44% | 0.00% |
| Jan. 8, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | A | Common Stock | 6657 | $0.00 | 119,929.0000 | 0 | 5.88% | 0.00% |
| Jan. 7, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | S | Common Stock | 3470 | $65.70 | 114,736.0000 | 0 | 2.94% | 0.00% |
| Jan. 8, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | S | Common Stock | 1464 | $66.05 | 113,272.0000 | 0 | 1.28% | 0.00% |
| Jan. 10, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | S | Common Stock | 1066 | $63.72 | 118,863.0000 | 0 | 0.89% | 0.00% |
| Jan. 8, 2025 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | A | Stock Option (right to buy) | 31930 | $0.00 | 31,930.0000 | 0 | 9999.99% | 0.00% |
| June 14, 2024 | Xilio Therapeutics, Inc. | $XLO | Bonstein Sara | Not found | A | Stock Option (right to buy) | 25000 | $0.00 | 25,000.0000 | 0 | 9999.99% | 0.00% |
| June 11, 2024 | scPharmaceuticals Inc. | $SCPH | Bonstein Sara | Not found | A | Stock Option (Right to Buy) | 19750 | $0.00 | 19,750.0000 | 38,513,747 | 9999.99% | 0.05% |
| May 28, 2024 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Stock Option (right to buy) | 3454 | $0.00 | 88,186.0000 | 0 | 3.77% | 0.00% |
| May 29, 2024 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Stock Option (right to buy) | 76731 | $0.00 | 11,455.0000 | 0 | 87.01% | 0.00% |
| May 28, 2024 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Stock Option (right to buy) | 3454 | $0.00 | 31,436.0000 | 0 | 9.90% | 0.00% |
| May 29, 2024 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Stock Option (right to buy) | 27074 | $0.00 | 4,362.0000 | 0 | 86.12% | 0.00% |
| May 28, 2024 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Stock Option (right to buy) | 3454 | $0.00 | 42,146.0000 | 0 | 7.57% | 0.00% |
| May 29, 2024 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Stock Option (right to buy) | 25046 | $0.00 | 17,100.0000 | 0 | 59.43% | 0.00% |
| May 28, 2024 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Stock Option (right to buy) | 3454 | $0.00 | 65,186.0000 | 0 | 5.03% | 0.00% |
| May 29, 2024 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Stock Option (right to buy) | 39446 | $0.00 | 25,740.0000 | 0 | 60.51% | 0.00% |
| May 28, 2024 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Stock Option (right to buy) | 3454 | $0.00 | 59,386.0000 | 0 | 5.50% | 0.00% |
| May 29, 2024 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Stock Option (right to buy) | 20111 | $0.00 | 39,275.0000 | 0 | 33.86% | 0.00% |
| May 28, 2024 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Stock Option (right to buy) | 3454 | $0.00 | 91,506.0000 | 0 | 3.64% | 0.00% |
| May 29, 2024 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Stock Option (right to buy) | 32156 | $0.00 | 59,350.0000 | 0 | 35.14% | 0.00% |
| May 28, 2024 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | S | Common Stock | 20724 | $50.01 | 338,045.0000 | 0 | 5.78% | 0.00% |
| May 29, 2024 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | S | Common Stock | 220564 | $50.00 | 117,481.0000 | 0 | 65.25% | 0.00% |
| May 29, 2024 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Common Stock | 25046 | $34.03 | 256,694.0000 | 0 | 10.81% | 0.00% |
| May 28, 2024 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Common Stock | 3454 | $34.03 | 231,648.0000 | 0 | 1.51% | 0.00% |
| May 29, 2024 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Common Stock | 27074 | $24.70 | 228,194.0000 | 0 | 13.46% | 0.00% |
| May 28, 2024 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Common Stock | 3454 | $24.70 | 201,120.0000 | 0 | 1.75% | 0.00% |
| May 29, 2024 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Common Stock | 76731 | $28.88 | 197,666.0000 | 0 | 63.45% | 0.00% |
| May 28, 2024 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Common Stock | 3454 | $28.88 | 120,935.0000 | 0 | 2.94% | 0.00% |
| May 29, 2024 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Common Stock | 32156 | $17.07 | 358,769.0000 | 0 | 9.85% | 0.00% |
| May 28, 2024 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Common Stock | 3454 | $17.07 | 326,613.0000 | 0 | 1.07% | 0.00% |
| May 29, 2024 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Common Stock | 20111 | $26.43 | 323,159.0000 | 0 | 6.64% | 0.00% |
| May 28, 2024 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Common Stock | 3454 | $26.43 | 303,048.0000 | 0 | 1.15% | 0.00% |
| May 29, 2024 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Common Stock | 39446 | $26.46 | 299,594.0000 | 0 | 15.16% | 0.00% |
| May 28, 2024 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | M | Common Stock | 3454 | $26.46 | 260,148.0000 | 0 | 1.35% | 0.00% |
| May 13, 2024 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | A | Stock Option (right to buy) | 71160 | $0.00 | 71,160.0000 | 0 | 9999.99% | 0.00% |
| May 13, 2024 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | A | Common Stock | 14518 | $0.00 | 128,569.0000 | 0 | 12.73% | 0.00% |
| May 14, 2024 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | S | Common Stock | 11088 | $25.32 | 117,481.0000 | 0 | 8.62% | 0.00% |
| Jan. 9, 2024 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | S | Common Stock | 4497 | $29.18 | 114,051.0000 | 0 | 3.79% | 0.00% |
| Jan. 4, 2024 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | A | Common Stock | 12873 | $0.00 | 118,548.0000 | 0 | 12.18% | 0.00% |
| Jan. 4, 2024 | INSMED Inc | $INSM | Bonstein Sara | Chief Financial Officer | A | Stock Option (right to buy) | 63560 | $0.00 | 63,560.0000 | 0 | 9999.99% | 0.00% |