IRIDIAN ASSET MANAGEMENT LLC/CT
Position in AXSM — Axsome Therapeutics, Inc.
CIK 1033427
WESTPORT, CT
Position in AXSM
as of Jun 30, 2026
· filed Jul 29, 2026
Position Value
$11,730,357
+$323,029 QoQ
Shares Held
47,924
-29.0% QoQ
Ownership
0.091%
of shares outstanding
% of Portfolio
4.04%
of 13F equity value
Holder Rank
#116
of 503 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in AXSM Over Time
Shares Held
Position Value (USD)
Derivatives in AXSM
reported options exposure · as of Dec 31, 2021CallValue
$566,700
CallShares
15,000
PutValue
$0
PutShares
0
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 Jun 30, 2026IRIDIAN ASSET MANAGEMENT LLC/CT holds $54,664,937 across 7 Biotechnology names. AXSM ranks #3 (21.5% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | PGEN |
Precigen, Inc.
|
4,031,963 | $22,982,189 | |
| 2 | NVCT |
Nuvectis Pharma, Inc.
|
777,078 | $14,290,464 | |
| 3 | AXSM |
Axsome Therapeutics, Inc.
This page
|
47,924 | $11,730,357 | |
| 4 | NKTR |
Nektar Therapeutics
|
38,802 | $2,708,767 | |
| 5 | TGTX |
Tg Therapeutics, Inc.
|
27,689 | $1,521,233 | |
| 6 | ABVX |
Abivax S.A.
|
9,165 | $1,221,327 | |
| 7 | BCTX |
BriaCell Therapeutics Corp.
|
65,000 | $210,600 |
All Filings in AXSM
Export CSV
31 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $11,730,357 | 47,924 | Shares | Sole | 2026-07-29 | |
| 2026-03-31 | $11,407,328 | 67,491 | Shares | Sole | 2026-04-24 | |
| 2025-12-31 | $13,475,727 | 73,783 | Shares | Sole | 2026-01-23 | |
| 2025-09-30 | $10,147,511 | 83,553 | Shares | Sole | 2025-10-24 | |
| 2025-06-30 | $9,578,930 | 91,761 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $12,399,168 | 106,312 | Shares | Sole | 2025-04-30 | |
| 2024-12-31 | $10,582,934 | 125,079 | Shares | Sole | 2025-01-28 | |
| 2024-09-30 | $11,395,785 | 126,803 | Shares | Sole | 2024-10-25 | |
| 2024-06-30 | $10,215,852 | 126,905 | Shares | Sole | 2024-07-26 | |
| 2024-03-31 | $10,281,591 | 128,842 | Shares | Sole | 2024-05-01 | |
| 2023-12-31 | $11,010,241 | 138,337 | Shares | Sole | 2024-01-26 | |
| 2023-09-30 | $10,136,356 | 145,033 | Shares | Sole | 2023-10-30 | |
| 2023-06-30 | $22,449,638 | 312,408 | Shares | Sole | 2023-08-09 | |
| 2023-03-31 | $17,934,816 | 290,772 | Shares | Sole | 2023-04-28 | |
| 2022-12-31 | $24,574,466 | 318,611 | Shares | Sole | 2023-01-31 | |
| 2022-09-30 | $17,897,438 | 401,108 | Shares | Sole | 2022-11-07 | |
| 2022-06-30 | $20,792,227 | 542,878 | Shares | Sole | 2022-07-29 | |
| 2022-03-31 | $21,422,636 | 517,580 | Shares | Sole | 2022-05-02 | |
| 2021-12-31 | $566,700 | 15,000 | Call | Sole | 2022-02-10 | |
| 2021-12-31 | $23,048,217 | 610,064 | Shares | Sole | 2022-02-10 | |
| 2021-09-30 | $46,923,602 | 1,423,653 | Shares | Sole | 2021-11-10 | |
| 2021-09-30 | $494,400 | 15,000 | Call | Sole | 2021-11-10 | |
| 2021-06-30 | $156,187,641 | 2,315,263 | Shares | Sole | 2021-08-11 | |
| 2021-06-30 | $1,517,850 | 22,500 | Call | Sole | 2021-08-11 | |
| 2021-03-31 | $136,488,341 | 2,410,603 | Shares | Sole | 2021-05-11 | |
| 2021-03-31 | $181,184 | 3,200 | Call | Sole | 2021-05-11 | |
| 2020-12-31 | $168,166,952 | 2,064,158 | Shares | Sole | 2021-02-08 | |
| 2020-09-30 | $122,751,138 | 1,722,823 | Shares | Sole | 2020-11-02 | |
| 2020-06-30 | $89,342,586 | 1,085,836 | Shares | Sole | 2020-08-10 | |
| 2020-03-31 | $68,949,583 | 1,172,014 | Shares | Sole | 2020-05-11 | |
| 2020-03-31 | $600,066 | 10,200 | Call | Sole | 2020-05-11 | |
| No filing history on record for this holder in this stock. | ||||||