Position in INSM
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$106,851,326
-$51,364,957 QoQ
Shares Held
653,445
-28.1% QoQ
Ownership
0.301%
of shares outstanding
% of Portfolio
5.02%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Dec 2023
10 quarters on record
Voting authority
Sole 81.99144533969958.ToString("F0")%
Shared 0.ToString("F0")%
None 18.00855466030041.ToString("F0")%
Common Shares in INSM Over Time
Shares Held
Position Value (USD)
Derivatives in INSM
reported options exposure · as of Dec 31, 2025CallValue
$0
CallShares
0
PutValue
$93,981,600
PutShares
540,000
Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.
Position in Biotechnology
Healthcare · as of Mar 31, 2026SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC holds $272,348,421 across 4 Biotechnology names. INSM ranks #1 (39.2% of the industry book) .
All Filings in INSM
Export CSV
17 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $106,851,326 | 653,445 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $93,981,600 | 540,000 | Put | Sole | 2026-02-17 | |
| 2025-12-31 | $158,216,283 | 909,080 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $72,005,000 | 500,000 | Put | Sole | 2025-11-14 | |
| 2025-09-30 | $150,036,098 | 1,041,845 | Shares | Sole | 2025-11-14 | |
| 2025-09-30 | $14,401,000 | 100,000 | Call | Sole | 2025-11-14 | |
| 2025-06-30 | $5,032,000 | 50,000 | Call | Sole | 2025-08-14 | |
| 2025-06-30 | $101,539,419 | 1,008,937 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $53,736,082 | 704,366 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $44,106,065 | 638,848 | Shares | Sole | 2025-02-14 | |
| 2024-12-31 | $13,711,344 | 198,600 | Put | Sole | 2025-02-14 | |
| 2024-09-30 | $42,219,988 | 578,356 | Shares | Sole | 2024-11-14 | |
| 2024-09-30 | $10,950,000 | 150,000 | Put | Sole | 2024-11-14 | |
| 2024-06-30 | $18,192,845 | 271,535 | Shares | Sole | 2024-08-14 | |
| 2024-06-30 | $13,460,300 | 200,900 | Call | Sole | 2024-08-14 | |
| 2024-03-31 | $2,715,713 | 100,100 | Call | Sole | 2024-05-15 | |
| 2023-12-31 | $10,489,836 | 338,491 | Shares | Sole | 2024-02-14 | |
| No filing history on record for this holder in this stock. | ||||||