Who owns AVLN
Which tracked institutional funds hold AVLN, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See AVLN 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.
Conviction spread
AVLN’s largest tracked holder by dollar value, FMR LLC, sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in AVLN 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
Only one quarter (2026-Q2) of 13F history is available — a quarter-over-quarter accumulation delta needs two.
We do not publish a positioning read for a window we cannot measure honestly. A starting question, not a verdict.
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 |
|---|---|---|---|---|
| FMR LLC new | 5,835,259 | $192M | 13.7% | 2026-Q2 |
| NOVO HOLDINGS A/S new | 3,883,289 | $128M | 9.1% | 2026-Q2 |
| SR One Capital Management, LP new | 3,308,649 | $109M | 7.7% | 2026-Q2 |
| PERCEPTIVE ADVISORS LLC new | 2,675,296 | $88M | 6.3% | 2026-Q2 |
| MONTANOVA CAPITAL, LLC new | 2,503,109 | $82M | 5.9% | 2026-Q2 |
| NVP ASSOCIATES, LLC new | 2,268,404 | $75M | 5.3% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP new | 2,201,986 | $72M | 5.2% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ new | 1,735,231 | $57M | 4.1% | 2026-Q2 |
| Catalio Capital Management, LP new | 1,675,830 | $55M | 3.9% | 2026-Q2 |
| EVENTIDE ASSET MANAGEMENT, LLC new | 1,375,486 | $45M | 3.2% | 2026-Q2 |
| Bellevue Group AG new | 1,350,000 | $44M | 3.2% | 2026-Q2 |
| BlackRock, Inc. new | 977,264 | $32M | 2.3% | 2026-Q2 |
| Pivotal bioVenture Partners Investment Advisor LLC new | 966,792 | $32M | 2.3% | 2026-Q2 |
| CITADEL ADVISORS LLC new | 959,098 | $32M | 2.2% | 2026-Q2 |
| ANDERA PARTNERS new | 929,824 | $31M | 2.2% | 2026-Q2 |
| JENNISON ASSOCIATES LLC new | 812,749 | $27M | 1.9% | 2026-Q2 |
| BRAIDWELL LP new | 801,395 | $26M | 1.9% | 2026-Q2 |
| TPG GP A, LLC new | 773,069 | $25M | 1.8% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 739,770 | $24M | 1.7% | 2026-Q2 |
| DEERFIELD MANAGEMENT COMPANY, L.P. new | 731,000 | $24M | 1.7% | 2026-Q2 |
| Rock Springs Capital Management LP new | 662,918 | $22M | 1.6% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC new | 434,650 | $14M | 1.0% | 2026-Q2 |
| Soleus Capital Management, L.P. new | 419,000 | $14M | 1.0% | 2026-Q2 |
| INFINITUM ASSET MANAGEMENT, LLC new | 411,378 | $14M | 1.0% | 2026-Q2 |
| BAKER BROS. ADVISORS LP new | 350,000 | $12M | 0.8% | 2026-Q2 |
| FRANKLIN RESOURCES INC new | 331,684 | $11M | 0.8% | 2026-Q2 |
| SILVERARC CAPITAL MANAGEMENT, LLC new | 330,487 | $11M | 0.8% | 2026-Q2 |
| STATE STREET CORP new | 318,995 | $11M | 0.7% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC new | 283,854 | $9M | 0.7% | 2026-Q2 |
| FEDERATED HERMES, INC. new | 160,000 | $5M | 0.4% | 2026-Q2 |
| Woodline Partners LP new | 150,999 | $5M | 0.4% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC new | 146,992 | $5M | 0.3% | 2026-Q2 |
| ADAR1 Capital Management, LLC new | 146,447 | $5M | 0.3% | 2026-Q2 |
| NORTHERN TRUST CORP new | 136,394 | $4M | 0.3% | 2026-Q2 |
| STEMPOINT CAPITAL LP new | 118,000 | $4M | 0.3% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 117,338 | $4M | 0.3% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO new | 116,763 | $4M | 0.3% | 2026-Q2 |
| Burkehill Global Management, LP new | 115,000 | $4M | 0.3% | 2026-Q2 |
| ACUTA CAPITAL PARTNERS, LLC new | 115,000 | $4M | 0.3% | 2026-Q2 |
| MOORE CAPITAL MANAGEMENT, LP new | 110,451 | $4M | 0.3% | 2026-Q2 |
| Blackstone Inc. new | 97,985 | $3M | 0.2% | 2026-Q2 |
| TD Asset Management Inc new | 94,636 | $3M | 0.2% | 2026-Q2 |
| SEVEN GRAND MANAGERS, LLC new | 75,000 | $2M | 0.2% | 2026-Q2 |
| Ghisallo Capital Management LLC new | 70,000 | $2M | 0.2% | 2026-Q2 |
| Atom Investors LP new | 68,254 | $2M | 0.2% | 2026-Q2 |
| Aberdeen Group plc new | 67,174 | $2M | 0.2% | 2026-Q2 |
| Zimmer Partners, LP new | 62,500 | $2M | 0.1% | 2026-Q2 |
| Avidity Partners Management LP new | 60,000 | $2M | 0.1% | 2026-Q2 |
| LMR Partners LLP new | 54,323 | $2M | 0.1% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC new | 50,045 | $2M | 0.1% | 2026-Q2 |
| Freestone Grove Partners LP new | 50,000 | $2M | 0.1% | 2026-Q2 |
| Brevan Howard Capital Management LP new | 43,001 | $1M | 0.1% | 2026-Q2 |
| Bank of New York Mellon Corp new | 40,140 | $1M | 0.1% | 2026-Q2 |
| Shay Capital LLC new | 40,000 | $1M | 0.1% | 2026-Q2 |
| BALYASNY ASSET MANAGEMENT L.P. new | 33,975 | $1M | 0.1% | 2026-Q2 |
| Nuveen, LLC new | 29,670 | $977K | 0.1% | 2026-Q2 |
| D. E. Shaw & Co., Inc. new | 23,000 | $757K | 0.1% | 2026-Q2 |
| Davidson Kempner Capital Management LP new | 23,000 | $757K | 0.1% | 2026-Q2 |
| RHUMBLINE ADVISERS new | 20,502 | $675K | 0.0% | 2026-Q2 |
| DEUTSCHE BANK AG\ new | 16,933 | $557K | 0.0% | 2026-Q2 |
| MORGAN STANLEY new | 16,906 | $557K | 0.0% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN new | 15,228 | $501K | 0.0% | 2026-Q2 |
| Hudson Bay Capital Management LP new | 14,180 | $467K | 0.0% | 2026-Q2 |
| Longaeva Partners L.P. new | 12,500 | $412K | 0.0% | 2026-Q2 |
| UBS Group AG new | 12,296 | $405K | 0.0% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ new | 11,668 | $384K | 0.0% | 2026-Q2 |
| Invesco Ltd. new | 11,607 | $382K | 0.0% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC new | 11,483 | $378K | 0.0% | 2026-Q2 |
| XTX Topco Ltd new | 10,640 | $350K | 0.0% | 2026-Q2 |
| MetLife Investment Management, LLC new | 10,308 | $339K | 0.0% | 2026-Q2 |
| SOROS FUND MANAGEMENT LLC new | 10,000 | $329K | 0.0% | 2026-Q2 |
| CITIGROUP INC new | 8,035 | $265K | 0.0% | 2026-Q2 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. new | 7,854 | $259K | 0.0% | 2026-Q2 |
| Vanguard Global Advisers, LLC new | 7,485 | $246K | 0.0% | 2026-Q2 |
| JPMORGAN CHASE & CO new | 7,102 | $220K | 0.0% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP new | 6,675 | $220K | 0.0% | 2026-Q2 |
| SEI INVESTMENTS CO new | 6,592 | $217K | 0.0% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND new | 6,000 | $198K | 0.0% | 2026-Q2 |
| Police & Firemen's Retirement System of New Jersey new | 5,052 | $166K | 0.0% | 2026-Q2 |
| BARCLAYS PLC new | 4,390 | $145K | 0.0% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS new | 3,958 | $130K | 0.0% | 2026-Q2 |
| Legal & General Group Plc new | 3,504 | $115K | 0.0% | 2026-Q2 |
| STRS OHIO new | 3,400 | $112K | 0.0% | 2026-Q2 |
| Persistent Asset Partners Ltd new | 2,064 | $68K | 0.0% | 2026-Q2 |
| Ameritas Investment Partners, Inc. new | 1,555 | $51K | 0.0% | 2026-Q2 |
| Russell Investments Group, Ltd. new | 1,369 | $45K | 0.0% | 2026-Q2 |
| Tower Research Capital LLC (TRC) new | 1,055 | $35K | 0.0% | 2026-Q2 |
| ROYAL BANK OF CANADA new | 588 | $19K | 0.0% | 2026-Q2 |
| NISA INVESTMENT ADVISORS, LLC new | 503 | $17K | 0.0% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM new | 236 | $8K | 0.0% | 2026-Q2 |
| Sterling Capital Management LLC new | 149 | $5K | 0.0% | 2026-Q2 |
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.