Dennis M. Lanfear serves as Executive at INSMED INC, where they oversee executive responsibilities. Since joining the company, Dennis M. Lanfear has executed 45 insider transactions totaling $17.2M, demonstrating a bearish approach to their equity position. Their most recent transaction on Jan 23, 2026 involved receiving (via award) 750,000 shares valued at $0.
Dennis M. Lanfear currently holds 750,000 shares of INSMED INC (INSM), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Dennis M. Lanfear has been a net seller of INSM stock. They have purchased $0 and sold $17.2M worth of shares.
Dennis M. Lanfear's most recent insider trade was on Jan 23, 2026, when they sold 750,000 shares at $0.00 per share.
Get notified when new Form 4 filings are submitted
| $N/A |
| Discretionary |
| Jan 20, 2026 | CHRS | $18.4K | Payment | 11,839 | $1.55 | Discretionary |
| Jan 20, 2024 | CHRS | $27.4K | Payment | 11,218 | $2.44 | Discretionary |
| Jan 4, 2024 | CHRS | $34.4K | Payment | 11,781 | $2.92 | Discretionary |
| Nov 22, 2023 | CHRS | $367.7K | Option Exercise | 258,940 | $1.42 | Discretionary |
| Nov 22, 2023 | CHRS | $450.7K | Sale | 223,100 | $2.02 | Discretionary |
| Nov 22, 2023 | CHRS | $58.2K | Option Exercise | 41,000 | $1.42 | Discretionary |
| Jan 20, 2023 | CHRS | $0 | Award | 86,250 | $N/A | Discretionary |
| Jan 4, 2023 | CHRS | $107.6K | Payment | 10,905 | $9.87 | Discretionary |
| Dec 30, 2022 | CHRS | $0 | Gift | 4,000 | $N/A | Discretionary |
| Jan 4, 2022 | CHRS | $0 | Award | 86,250 | $N/A | Discretionary |
| Nov 17, 2021 | CHRS | $0 | Gift | 10,000 | $N/A | Discretionary |
| Jun 8, 2021 | CHRS | $13.0K | Option Exercise | 31,054 | $0.42 | Discretionary |
| Jun 8, 2021 | CHRS | $421.1K | Sale | 31,054 | $13.56 | Discretionary |
| Jun 6, 2021 | CHRS | $126.0K | Option Exercise | 300,000 | $0.42 | Discretionary |
| Jul 1, 2020 | CHRS | $0 | Option Exercise | 29,994 | $N/A | Discretionary |
| Jan 10, 2020 | CHRS | $381.5K | Payment | 21,516 | $17.73 | Discretionary |
| Jan 10, 2020 | CHRS | $0 | Award | 59,763 | $N/A | Discretionary |
| Nov 21, 2019 | CHRS | $232.0K | Sale | 12,500 | $18.56 | Discretionary |
| Nov 20, 2019 | CHRS | $14.8M | Sale | 825,000 | $18.00 | Discretionary |
| May 30, 2019 | CHRS | $631.4K | Sale | 32,398 | $19.49 | Discretionary |
| Jan 11, 2019 | CHRS | $0 | Award | 50,265 | $N/A | Discretionary |
| Jan 11, 2019 | CHRS | $221.0K | Payment | 17,867 | $12.37 | Discretionary |
| May 16, 2018 | CHRS | $341.2K | Sale | 20,984 | $16.26 | Discretionary |
| Dec 15, 2017 | CHRS | $0 | Award | 20,984 | $N/A | Discretionary |
| Sep 21, 2016 | CHRS | $1.6K | Sale | 50 | $31.75 | Discretionary |
| Sep 20, 2016 | CHRS | $127.3K | Sale | 4,010 | $31.75 | Discretionary |
| Sep 16, 2016 | CHRS | $92.2K | Sale | 2,900 | $31.79 | Discretionary |
| Nov 30, 2015 | CHRS | $12.7K | Sale | 400 | $31.75 | Discretionary |