Axsome Therapeutics Inc
Ownership
Ownership Structure
Who owns Axsome Therapeutics Inc (AXSM)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 84.9% of the shares are freely tradable; institutional investors hold 76.6%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 7.47 | 3,912,844 | +0.0 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 3.93 | 2,058,170 | +0.0 | 03/31/2026 |
| Vanguard Capital Management, LLC | 3.70 | 1,937,752 | +0.0 | 03/31/2026 |
| FMR Inc | 2.99 | 1,566,995 | +32.6 | 03/31/2026 |
| T. Rowe Price Associates, Inc. | 2.51 | 1,317,059 | -12.8 | 03/31/2026 |
| Amvescap Plc. | 2.48 | 1,297,678 | +1.9 | 03/31/2026 |
| Geode Capital Management, LLC | 2.22 | 1,162,981 | +15.1 | 03/31/2026 |
| State Street Corp | 1.88 | 986,809 | +3.0 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 2.66 | 1,393,414 | +0.3 | 07/31/2026 |
| Vanguard Small Cap Index | 1.92 | 1,004,997 | +0.2 | 07/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Tabuteau Herriot | Chief Executive Officer | 7,229 | 1,549,175 $ | Aug 6, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 3, 2026 | Jacobson Mark L. | Chief Operating Officer | Sell | 10,000 | 208.65 | 2,086,500 |
| Sep 3, 2026 | Jacobson Mark L. | Chief Operating Officer | Other | 10,000 | 12.95 | 129,500 |
| Aug 6, 2026 | Tabuteau Herriot | Chief Executive Officer | Sell | 4,660 | 213.95 | 997,007 |
| Aug 6, 2026 | Tabuteau Herriot | Chief Executive Officer | Other | 4,660 | 4.95 | 23,067 |
| Aug 5, 2026 | Tabuteau Herriot | Chief Executive Officer | Sell | 45,004 | 212.01 | 9,541,298 |
| Aug 5, 2026 | Tabuteau Herriot | Chief Executive Officer | Other | 45,004 | 4.95 | 222,770 |
| Apr 22, 2026 | Ari Maizel | Insider | Sell | 7,500 | 182.42 | 1,368,150 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 17, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.