Who owns Axsome Therapeutics (AXSM)
Which tracked institutional funds hold AXSM, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See AXSM company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on AXSM is one-sided between 2026-Q1 and 2026-Q2: 255 added or opened and 68 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
AXSM’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.1% of theirs — a 0.0pp gap the other way — the median holder sizes AXSM more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in AXSM divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 481 tracked filers holding AXSM, 279 increased or opened the position and 215 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in AXSM between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 63
- SAMLYN CAPITAL, LLC$60M
- WESTFIELD CAPITAL MANAGEMENT CO LP$36M
- ARROWSTREET CAPITAL, LIMITED PARTNERSHIP$33M
- Public Sector Pension Investment Board$28M
- Weiss Asset Management LP$20M
- BALYASNY ASSET MANAGEMENT L.P.$19M
Full exits 30
- HighTower Advisors, LLC$10M
- Cormorant Asset Management, LP$8M
- Blackstone Inc.$4M
- SCHRODER INVESTMENT MANAGEMENT GROUP$4M
- Empowered Funds, LLC$4M
- Tetragon Partners GP Ltd$3M
Largest adds
- Invesco Ltd.$209M
- BlackRock, Inc.$207M
- VANGUARD CAPITAL MANAGEMENT LLC$153M
- VANGUARD PORTFOLIO MANAGEMENT LLC$138M
- MILLENNIUM MANAGEMENT LLC$133M
- MORGAN STANLEY$116M
Largest trims
- PRICE T ROWE ASSOCIATES INC /MD/$65M
- ADAGE CAPITAL PARTNERS GP, L.L.C.$61M
- UBS Group AG$55M
- Assenagon Asset Management S.A.$35M
- WELLINGTON MANAGEMENT GROUP LLP$33M
- 1832 Asset Management L.P.$17M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. trimmed | 3,103,708 | $760M | 9.1% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC trimmed | 1,983,514 | $486M | 5.8% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 1,965,086 | $481M | 5.8% | 2026-Q2 |
| Invesco Ltd. added | 1,671,684 | $409M | 4.9% | 2026-Q2 |
| FMR LLC trimmed | 1,539,163 | $377M | 4.5% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 967,172 | $237M | 2.8% | 2026-Q2 |
| MORGAN STANLEY added | 804,082 | $197M | 2.4% | 2026-Q2 |
| STATE STREET CORP trimmed | 785,661 | $192M | 2.3% | 2026-Q2 |
| Deep Track Capital, LP trimmed | 700,000 | $171M | 2.0% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP added | 669,478 | $164M | 2.0% | 2026-Q2 |
| FRANKLIN RESOURCES INC added | 668,373 | $164M | 2.0% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 653,920 | $160M | 1.9% | 2026-Q2 |
| ALETHEA CAPITAL MANAGEMENT, LLC trimmed | 648,756 | $159M | 1.9% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ trimmed | 642,893 | $157M | 1.9% | 2026-Q2 |
| D. E. Shaw & Co., Inc. added | 604,753 | $148M | 1.8% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC added | 556,088 | $136M | 1.6% | 2026-Q2 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. trimmed | 539,407 | $132M | 1.6% | 2026-Q2 |
| NORGES BANK added | 514,266 | $126M | 1.5% | 2026-Q2 |
| FIRST TRUST ADVISORS LP trimmed | 482,061 | $118M | 1.4% | 2026-Q2 |
| Assenagon Asset Management S.A. trimmed | 454,682 | $111M | 1.3% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 452,491 | $111M | 1.3% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC added | 428,079 | $105M | 1.3% | 2026-Q2 |
| Pictet Asset Management Holding SA added | 426,527 | $104M | 1.2% | 2026-Q2 |
| Qube Research & Technologies Ltd added | 426,336 | $104M | 1.2% | 2026-Q2 |
| Point72 Asset Management, L.P. trimmed | 416,516 | $102M | 1.2% | 2026-Q2 |
| JANE STREET GROUP, LLC added | 403,995 | $99M | 1.2% | 2026-Q2 |
| Hood River Capital Management LLC added | 402,678 | $99M | 1.2% | 2026-Q2 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND added | 373,067 | $91M | 1.1% | 2026-Q2 |
| Driehaus Capital Management LLC added | 372,474 | $91M | 1.1% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC trimmed | 332,642 | $81M | 1.0% | 2026-Q2 |
| EVENTIDE ASSET MANAGEMENT, LLC trimmed | 316,820 | $78M | 0.9% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 316,104 | $77M | 0.9% | 2026-Q2 |
| Integral Health Asset Management, LLC added | 300,000 | $73M | 0.9% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO trimmed | 279,738 | $68M | 0.8% | 2026-Q2 |
| NORTHERN TRUST CORP trimmed | 270,189 | $66M | 0.8% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC added | 262,000 | $64M | 0.8% | 2026-Q2 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. trimmed | 259,034 | $63M | 0.8% | 2026-Q2 |
| CITADEL ADVISORS LLC trimmed | 255,878 | $63M | 0.7% | 2026-Q2 |
| FRONTIER CAPITAL MANAGEMENT CO LLC added | 254,280 | $62M | 0.7% | 2026-Q2 |
| SAMLYN CAPITAL, LLC new | 246,015 | $60M | 0.7% | 2026-Q2 |
| Clearbridge Investments, LLC added | 245,574 | $60M | 0.7% | 2026-Q2 |
| LOOMIS SAYLES & CO L P trimmed | 239,490 | $59M | 0.7% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS added | 230,954 | $57M | 0.7% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC trimmed | 229,668 | $56M | 0.7% | 2026-Q2 |
| CANADA PENSION PLAN INVESTMENT BOARD added | 225,400 | $55M | 0.7% | 2026-Q2 |
| MARSHALL WACE, LLP added | 223,386 | $55M | 0.7% | 2026-Q2 |
| PFM Health Sciences, LP trimmed | 219,596 | $54M | 0.6% | 2026-Q2 |
| Tri Locum Partners LP added | 219,308 | $54M | 0.6% | 2026-Q2 |
| First Turn Management, LLC added | 218,415 | $53M | 0.6% | 2026-Q2 |
| Bank of New York Mellon Corp trimmed | 197,226 | $48M | 0.6% | 2026-Q2 |
| Nuveen, LLC trimmed | 190,080 | $47M | 0.6% | 2026-Q2 |
| FEDERATED HERMES, INC. added | 177,842 | $44M | 0.5% | 2026-Q2 |
| Woodline Partners LP | 162,221 | $40M | 0.5% | 2026-Q2 |
| JPMORGAN CHASE & CO trimmed | 162,065 | $40M | 0.5% | 2026-Q2 |
| Sofinnova Investments, Inc. trimmed | 160,429 | $39M | 0.5% | 2026-Q2 |
| NEUBERGER BERMAN GROUP LLC added | 156,523 | $38M | 0.5% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC added | 155,855 | $38M | 0.5% | 2026-Q2 |
| Squarepoint Ops LLC added | 154,605 | $38M | 0.5% | 2026-Q2 |
| UBS Group AG trimmed | 151,903 | $37M | 0.4% | 2026-Q2 |
| WESTFIELD CAPITAL MANAGEMENT CO LP new | 145,145 | $36M | 0.4% | 2026-Q2 |
| VOYA INVESTMENT MANAGEMENT LLC trimmed | 142,051 | $35M | 0.4% | 2026-Q2 |
| CITIGROUP INC trimmed | 136,858 | $33M | 0.4% | 2026-Q2 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP new | 135,195 | $33M | 0.4% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 127,178 | $31M | 0.4% | 2026-Q2 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE added | 118,999 | $29M | 0.3% | 2026-Q2 |
| PERCEPTIVE ADVISORS LLC trimmed | 118,450 | $29M | 0.3% | 2026-Q2 |
| ORBIMED ADVISORS LLC trimmed | 117,578 | $29M | 0.3% | 2026-Q2 |
| Public Sector Pension Investment Board new | 116,000 | $28M | 0.3% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC added | 114,025 | $28M | 0.3% | 2026-Q2 |
| EMERALD ADVISERS, LLC trimmed | 104,237 | $26M | 0.3% | 2026-Q2 |
| Nicholas Investment Partners, LP added | 98,974 | $24M | 0.3% | 2026-Q2 |
| Connor, Clark & Lunn Investment Management Ltd. trimmed | 97,698 | $24M | 0.3% | 2026-Q2 |
| ALGERT GLOBAL LLC trimmed | 95,335 | $23M | 0.3% | 2026-Q2 |
| ROYCE & ASSOCIATES LP trimmed | 91,041 | $22M | 0.3% | 2026-Q2 |
| MetLife Investment Management, LLC trimmed | 89,662 | $22M | 0.3% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 87,815 | $21M | 0.3% | 2026-Q2 |
| DEUTSCHE BANK AG\ trimmed | 86,466 | $21M | 0.3% | 2026-Q2 |
| Voleon Capital Management LP trimmed | 84,433 | $21M | 0.2% | 2026-Q2 |
| Cannell & Spears LLC | 84,154 | $21M | 0.2% | 2026-Q2 |
| Trexquant Investment LP added | 83,679 | $20M | 0.2% | 2026-Q2 |
| Man Group plc trimmed | 82,526 | $20M | 0.2% | 2026-Q2 |
| Granite Investment Partners, LLC trimmed | 80,124 | $20M | 0.2% | 2026-Q2 |
| Weiss Asset Management LP new | 80,000 | $20M | 0.2% | 2026-Q2 |
| Swiss National Bank added | 79,500 | $19M | 0.2% | 2026-Q2 |
| Aberdeen Group plc trimmed | 78,236 | $19M | 0.2% | 2026-Q2 |
| SEI INVESTMENTS CO added | 76,462 | $19M | 0.2% | 2026-Q2 |
| BALYASNY ASSET MANAGEMENT L.P. added | 76,250 | $19M | 0.2% | 2026-Q2 |
| WCM INVESTMENT MANAGEMENT, LLC trimmed | 75,713 | $18M | 0.2% | 2026-Q2 |
| California Public Employees Retirement System added | 74,778 | $18M | 0.2% | 2026-Q2 |
| Science & Technology Partners, L.P. new | 73,040 | $18M | 0.2% | 2026-Q2 |
| TimesSquare Capital Management, LLC new | 71,510 | $18M | 0.2% | 2026-Q2 |
| EMERALD MUTUAL FUND ADVISERS TRUST added | 67,195 | $16M | 0.2% | 2026-Q2 |
| US BANCORP \DE\ trimmed | 66,580 | $16M | 0.2% | 2026-Q2 |
| DNB Asset Management AS trimmed | 65,199 | $16M | 0.2% | 2026-Q2 |
| Eagle Health Investments LP new | 65,051 | $16M | 0.2% | 2026-Q2 |
| Universal- Beteiligungs- und Servicegesellschaft mbH trimmed | 63,551 | $16M | 0.2% | 2026-Q2 |
| Rhenman & Partners Asset Management AB trimmed | 63,050 | $15M | 0.2% | 2026-Q2 |
| Atika Capital Management LLC added | 63,000 | $15M | 0.2% | 2026-Q2 |
| Allspring Global Investments Holdings, LLC added | 62,528 | $15M | 0.2% | 2026-Q2 |
| IFP Advisors, Inc added | 62,273 | $15M | 0.2% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.