Who owns ASND
Which tracked institutional funds hold ASND, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See ASND 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 ASND is one-sided between 2026-Q1 and 2026-Q2: 201 added or opened and 5 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
ASND’s largest tracked holder by dollar value, RA CAPITAL MANAGEMENT, L.P., sizes it at 23.8% of its own reported 13F book, while the median holder sizes it at 0.1% of theirs — a 23.8pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in ASND 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 284 tracked filers holding ASND, 279 increased or opened the position and 6 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 ASND 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 200
- RA CAPITAL MANAGEMENT, L.P.$2.7B
- Avoro Capital Advisors LLC$1.4B
- WESTFIELD CAPITAL MANAGEMENT CO LP$1.3B
- Jupiter Topco LLC$973M
- FMR LLC$946M
- Artisan Partners Limited Partnership$703M
Full exits 2
- T. Rowe Price Investment Management, Inc.$1.4B
- Q Global Advisors, LLC$23M
Largest adds
- PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO$4M
Largest trims
- PRICE T ROWE ASSOCIATES INC /MD/$51M
- Driehaus Capital Management LLC$10M
- Evolutionary Tree Capital Management, LLC$461K
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 |
|---|---|---|---|---|
| RA CAPITAL MANAGEMENT, L.P. new | 10,281,496 | $2.7B | 17.7% | 2026-Q2 |
| Avoro Capital Advisors LLC new | 5,111,111 | $1.4B | 8.8% | 2026-Q2 |
| WESTFIELD CAPITAL MANAGEMENT CO LP new | 4,798,267 | $1.3B | 8.2% | 2026-Q2 |
| Jupiter Topco LLC new | 3,648,772 | $973M | 6.3% | 2026-Q2 |
| FMR LLC new | 3,545,575 | $946M | 6.1% | 2026-Q2 |
| Artisan Partners Limited Partnership new | 2,634,024 | $703M | 4.5% | 2026-Q2 |
| BlackRock, Inc. new | 2,211,833 | $590M | 3.8% | 2026-Q2 |
| Capital International Investors new | 1,988,614 | $530M | 3.4% | 2026-Q2 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ new | 1,875,301 | $500M | 3.2% | 2026-Q2 |
| FRANKLIN RESOURCES INC new | 1,862,503 | $497M | 3.2% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP new | 1,548,636 | $413M | 2.7% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC new | 1,400,575 | $374M | 2.4% | 2026-Q2 |
| PERCEPTIVE ADVISORS LLC new | 1,163,721 | $310M | 2.0% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ trimmed | 1,122,529 | $299M | 1.9% | 2026-Q2 |
| Capital World Investors new | 906,081 | $242M | 1.6% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC new | 873,502 | $233M | 1.5% | 2026-Q2 |
| Polar Capital Holdings Plc new | 616,908 | $165M | 1.1% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC new | 559,534 | $149M | 1.0% | 2026-Q2 |
| MORGAN STANLEY new | 544,393 | $145M | 0.9% | 2026-Q2 |
| STATE STREET CORP new | 513,969 | $137M | 0.9% | 2026-Q2 |
| Invesco Ltd. new | 414,196 | $110M | 0.7% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC new | 403,151 | $108M | 0.7% | 2026-Q2 |
| UBS Group AG new | 401,881 | $107M | 0.7% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. new | 399,292 | $106M | 0.7% | 2026-Q2 |
| Vestal Point Capital, LP new | 375,000 | $100M | 0.6% | 2026-Q2 |
| JPMORGAN CHASE & CO new | 367,781 | $97M | 0.6% | 2026-Q2 |
| FIL Ltd new | 345,567 | $92M | 0.6% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC new | 320,514 | $85M | 0.6% | 2026-Q2 |
| Bank of New York Mellon Corp new | 319,412 | $85M | 0.5% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP new | 305,803 | $82M | 0.5% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC new | 266,708 | $71M | 0.5% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ new | 260,638 | $70M | 0.4% | 2026-Q2 |
| Tri Locum Partners LP new | 258,740 | $69M | 0.4% | 2026-Q2 |
| ORBIMED ADVISORS LLC new | 244,456 | $65M | 0.4% | 2026-Q2 |
| SEI INVESTMENTS CO new | 237,869 | $63M | 0.4% | 2026-Q2 |
| Pictet Asset Management Holding SA new | 234,039 | $62M | 0.4% | 2026-Q2 |
| PFM Health Sciences, LP new | 233,171 | $62M | 0.4% | 2026-Q2 |
| Spyglass Capital Management LLC new | 215,398 | $57M | 0.4% | 2026-Q2 |
| ARS Investment Partners, LLC new | 210,462 | $56M | 0.4% | 2026-Q2 |
| SILVERARC CAPITAL MANAGEMENT, LLC new | 206,234 | $55M | 0.4% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND new | 191,791 | $51M | 0.3% | 2026-Q2 |
| Empowered Funds, LLC new | 187,271 | $50M | 0.3% | 2026-Q2 |
| JANE STREET GROUP, LLC new | 187,141 | $50M | 0.3% | 2026-Q2 |
| Allspring Global Investments Holdings, LLC new | 178,738 | $48M | 0.3% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS new | 173,449 | $46M | 0.3% | 2026-Q2 |
| FRED ALGER MANAGEMENT, LLC new | 171,447 | $46M | 0.3% | 2026-Q2 |
| Rock Springs Capital Management LP new | 168,750 | $45M | 0.3% | 2026-Q2 |
| RICE HALL JAMES & ASSOCIATES, LLC new | 148,644 | $40M | 0.3% | 2026-Q2 |
| USS Investment Management Ltd new | 141,010 | $38M | 0.2% | 2026-Q2 |
| CITADEL ADVISORS LLC new | 137,889 | $37M | 0.2% | 2026-Q2 |
| BRAUN STACEY ASSOCIATES INC new | 132,682 | $35M | 0.2% | 2026-Q2 |
| Walleye Capital LLC new | 126,005 | $34M | 0.2% | 2026-Q2 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP new | 125,772 | $34M | 0.2% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC new | 119,699 | $32M | 0.2% | 2026-Q2 |
| TD Asset Management Inc new | 119,085 | $32M | 0.2% | 2026-Q2 |
| Resolute Capital Asset Partners LLC new | 118,627 | $32M | 0.2% | 2026-Q2 |
| Eagle Health Investments LP new | 106,158 | $28M | 0.2% | 2026-Q2 |
| First Turn Management, LLC new | 104,877 | $28M | 0.2% | 2026-Q2 |
| NORTHERN TRUST CORP new | 103,933 | $28M | 0.2% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 103,540 | $28M | 0.2% | 2026-Q2 |
| Fiera Capital Corp new | 103,313 | $28M | 0.2% | 2026-Q2 |
| Woodline Partners LP new | 102,469 | $27M | 0.2% | 2026-Q2 |
| Defilade Capital Management, L.P. new | 94,843 | $25M | 0.2% | 2026-Q2 |
| SAPIENT CAPITAL LLC new | 92,162 | $25M | 0.2% | 2026-Q2 |
| Synergy Asset Management, LLC new | 91,228 | $24M | 0.2% | 2026-Q2 |
| Nuveen, LLC new | 90,318 | $24M | 0.2% | 2026-Q2 |
| CANADA PENSION PLAN INVESTMENT BOARD new | 85,478 | $23M | 0.1% | 2026-Q2 |
| LOOMIS SAYLES & CO L P new | 78,941 | $21M | 0.1% | 2026-Q2 |
| BARCLAYS PLC new | 76,540 | $20M | 0.1% | 2026-Q2 |
| Driehaus Capital Management LLC trimmed | 70,061 | $19M | 0.1% | 2026-Q2 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. new | 66,500 | $18M | 0.1% | 2026-Q2 |
| CASTLEARK MANAGEMENT LLC new | 61,696 | $16M | 0.1% | 2026-Q2 |
| Atika Capital Management LLC new | 61,000 | $16M | 0.1% | 2026-Q2 |
| VOYA INVESTMENT MANAGEMENT LLC new | 54,332 | $14M | 0.1% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN new | 50,353 | $13M | 0.1% | 2026-Q2 |
| Cormorant Asset Management, LP new | 50,000 | $13M | 0.1% | 2026-Q2 |
| RHUMBLINE ADVISERS new | 48,612 | $13M | 0.1% | 2026-Q2 |
| DAFNA Capital Management LLC new | 48,469 | $13M | 0.1% | 2026-Q2 |
| Russell Investments Group, Ltd. new | 48,360 | $13M | 0.1% | 2026-Q2 |
| Trexquant Investment LP new | 47,269 | $13M | 0.1% | 2026-Q2 |
| ENVESTNET ASSET MANAGEMENT INC new | 45,776 | $12M | 0.1% | 2026-Q2 |
| Integral Health Asset Management, LLC new | 45,000 | $12M | 0.1% | 2026-Q2 |
| NOMURA ASSET MANAGEMENT CO LTD new | 43,678 | $12M | 0.1% | 2026-Q2 |
| XTX Topco Ltd new | 43,289 | $12M | 0.1% | 2026-Q2 |
| Eversept Partners, LP new | 41,621 | $11M | 0.1% | 2026-Q2 |
| Nicholas Investment Partners, LP new | 38,160 | $10M | 0.1% | 2026-Q2 |
| Aberdeen Group plc new | 36,512 | $10M | 0.1% | 2026-Q2 |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM new | 33,383 | $9M | 0.1% | 2026-Q2 |
| Longaeva Partners L.P. new | 32,036 | $9M | 0.1% | 2026-Q2 |
| Catalio Capital Management, LP new | 31,759 | $8M | 0.1% | 2026-Q2 |
| BALYASNY ASSET MANAGEMENT L.P. new | 31,023 | $8M | 0.1% | 2026-Q2 |
| D. E. Shaw & Co., Inc. new | 30,883 | $8M | 0.1% | 2026-Q2 |
| Affinity Asset Advisors, LLC new | 30,000 | $8M | 0.1% | 2026-Q2 |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC new | 29,303 | $8M | 0.1% | 2026-Q2 |
| CITIGROUP INC new | 28,693 | $8M | 0.0% | 2026-Q2 |
| ADAR1 Capital Management, LLC new | 28,604 | $8M | 0.0% | 2026-Q2 |
| Matisse Capital new | 28,107 | $7M | 0.0% | 2026-Q2 |
| VICTORY CAPITAL MANAGEMENT INC new | 27,540 | $7M | 0.0% | 2026-Q2 |
| ROYAL BANK OF CANADA new | 27,283 | $7M | 0.0% | 2026-Q2 |
| CAPITAL INTERNATIONAL SARL new | 26,222 | $7M | 0.0% | 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.