Who owns Atea Pharmaceuticals (AVIR)
Which tracked institutional funds hold AVIR, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See AVIR 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 AVIR is one-sided between 2026-Q1 and 2026-Q2: 7 added or opened and 32 trimmed or exited — on balance reducing.
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
AVIR’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 AVIR 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 122 tracked filers holding AVIR, 63 increased or opened the position and 61 reduced or closed it; over the same quarter, open-market insider Form 4s were net purchases.
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 AVIR 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.
Full exits 6
- ACADIAN ASSET MANAGEMENT LLC$9M
- JANE STREET GROUP, LLC$2M
- Irenic Capital Management LP$2M
- Peapod Lane Capital LLC$1M
- Point72 Asset Management, L.P.$643K
- Informed Momentum Co LLC$607K
Largest adds
- Quantinno Capital Management LP$1M
- AQR CAPITAL MANAGEMENT LLC$904K
- BARCLAYS PLC$755K
- WELLINGTON MANAGEMENT GROUP LLP$655K
- Invesco Ltd.$525K
- CITADEL ADVISORS LLC$471K
Largest trims
- FMR LLC$8M
- BML Capital Management, LLC$6M
- BlackRock, Inc.$5M
- VANGUARD CAPITAL MANAGEMENT LLC$4M
- TANG CAPITAL MANAGEMENT LLC$4M
- Bain Capital Life Sciences Investors, LLC$3M
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 added | 12,004,064 | $56M | 20.9% | 2026-Q2 |
| BlackRock, Inc. added | 8,720,077 | $41M | 15.2% | 2026-Q2 |
| BML Capital Management, LLC trimmed | 6,952,330 | $32M | 12.1% | 2026-Q2 |
| TANG CAPITAL MANAGEMENT LLC | 4,814,700 | $22M | 8.4% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC trimmed | 2,964,862 | $14M | 5.2% | 2026-Q2 |
| Bain Capital Life Sciences Investors, LLC trimmed | 2,075,639 | $10M | 3.6% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,958,435 | $9M | 3.4% | 2026-Q2 |
| STATE STREET CORP trimmed | 1,652,399 | $8M | 2.9% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP trimmed | 1,506,697 | $7M | 2.6% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 1,299,515 | $6M | 2.3% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 1,131,200 | $5M | 2.0% | 2026-Q2 |
| Rosalind Advisors, Inc. trimmed | 1,070,550 | $5M | 1.9% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 945,918 | $4M | 1.6% | 2026-Q2 |
| NORTHERN TRUST CORP added | 755,239 | $4M | 1.3% | 2026-Q2 |
| MORGAN STANLEY trimmed | 719,514 | $3M | 1.3% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 630,185 | $3M | 1.1% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 610,607 | $3M | 1.1% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC trimmed | 530,856 | $2M | 0.9% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO trimmed | 469,801 | $2M | 0.8% | 2026-Q2 |
| CM Management, LLC | 355,000 | $2M | 0.6% | 2026-Q2 |
| BARCLAYS PLC added | 348,653 | $2M | 0.6% | 2026-Q2 |
| D. E. Shaw & Co., Inc. trimmed | 345,186 | $2M | 0.6% | 2026-Q2 |
| BANQUE PICTET & CIE SA | 345,077 | $2M | 0.6% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC trimmed | 304,611 | $1M | 0.5% | 2026-Q2 |
| Nuveen, LLC added | 284,283 | $1M | 0.5% | 2026-Q2 |
| Invesco Ltd. added | 267,125 | $1M | 0.5% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC added | 247,710 | $1M | 0.4% | 2026-Q2 |
| Quantinno Capital Management LP added | 242,302 | $1M | 0.4% | 2026-Q2 |
| Opaleye Management Inc. trimmed | 235,000 | $1M | 0.4% | 2026-Q2 |
| HSBC HOLDINGS PLC trimmed | 221,009 | $1M | 0.4% | 2026-Q2 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 210,542 | $979K | 0.4% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP added | 206,785 | $962K | 0.4% | 2026-Q2 |
| Bank of New York Mellon Corp added | 189,452 | $881K | 0.3% | 2026-Q2 |
| Auour Investments LLC | 177,000 | $823K | 0.3% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC added | 170,657 | $794K | 0.3% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 157,224 | $731K | 0.3% | 2026-Q2 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC trimmed | 130,900 | $609K | 0.2% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. added | 124,220 | $668K | 0.3% | 2026-Q2 |
| STATE OF WISCONSIN INVESTMENT BOARD added | 118,757 | $552K | 0.2% | 2026-Q2 |
| STRS OHIO added | 117,700 | $547K | 0.2% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 115,808 | $539K | 0.2% | 2026-Q2 |
| Jump Financial, LLC added | 102,421 | $476K | 0.2% | 2026-Q2 |
| UBS Group AG trimmed | 94,507 | $439K | 0.2% | 2026-Q2 |
| RHUMBLINE ADVISERS added | 91,124 | $424K | 0.2% | 2026-Q2 |
| Aldebaran Capital, LLC trimmed | 88,180 | $410K | 0.2% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 81,730 | $380K | 0.1% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 78,721 | $366K | 0.1% | 2026-Q2 |
| DEUTSCHE BANK AG\ added | 70,400 | $327K | 0.1% | 2026-Q2 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 70,000 | $326K | 0.1% | 2026-Q2 |
| Susquehanna Portfolio Strategies, LLC added | 62,073 | $289K | 0.1% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 59,716 | $278K | 0.1% | 2026-Q2 |
| Russell Investments Group, Ltd. added | 54,892 | $255K | 0.1% | 2026-Q2 |
| Rangeley Capital, LLC trimmed | 43,500 | $202K | 0.1% | 2026-Q2 |
| MetLife Investment Management, LLC trimmed | 39,466 | $184K | 0.1% | 2026-Q2 |
| ALGERT GLOBAL LLC added | 38,520 | $179K | 0.1% | 2026-Q2 |
| NANO CAP NEW MILLENNIUM GROWTH FUND L P added | 35,000 | $163K | 0.1% | 2026-Q2 |
| CITIGROUP INC added | 34,614 | $161K | 0.1% | 2026-Q2 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. trimmed | 32,658 | $152K | 0.1% | 2026-Q2 |
| RBF Capital, LLC | 30,000 | $140K | 0.1% | 2026-Q2 |
| Squarepoint Ops LLC trimmed | 29,316 | $136K | 0.1% | 2026-Q2 |
| MERCER GLOBAL ADVISORS INC /ADV new | 27,860 | $130K | 0.0% | 2026-Q2 |
| Vanguard Global Advisers, LLC | 25,681 | $119K | 0.0% | 2026-Q2 |
| JOHNSON INVESTMENT COUNSEL INC added | 25,590 | $119K | 0.0% | 2026-Q2 |
| Certified Advisory Corp | 24,500 | $114K | 0.0% | 2026-Q2 |
| Creative Planning trimmed | 23,103 | $107K | 0.0% | 2026-Q2 |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM | 22,010 | $102K | 0.0% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 19,038 | $89K | 0.0% | 2026-Q2 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE trimmed | 17,698 | $82K | 0.0% | 2026-Q2 |
| Police & Firemen's Retirement System of New Jersey | 16,938 | $79K | 0.0% | 2026-Q2 |
| Engineers Gate Manager LP new | 16,806 | $78K | 0.0% | 2026-Q2 |
| INTECH INVESTMENT MANAGEMENT LLC trimmed | 16,655 | $77K | 0.0% | 2026-Q2 |
| Headlands Technologies LLC new | 16,619 | $77K | 0.0% | 2026-Q2 |
| Cerity Partners LLC new | 16,471 | $77K | 0.0% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND | 16,346 | $76K | 0.0% | 2026-Q2 |
| VOYA INVESTMENT MANAGEMENT LLC added | 16,242 | $76K | 0.0% | 2026-Q2 |
| Spark Investment Management LLC new | 16,200 | $75K | 0.0% | 2026-Q2 |
| Graham Capital Management, L.P. added | 16,145 | $75K | 0.0% | 2026-Q2 |
| BAILARD, INC. new | 16,100 | $75K | 0.0% | 2026-Q2 |
| RFG Advisory, LLC | 14,875 | $69K | 0.0% | 2026-Q2 |
| Trexquant Investment LP new | 14,751 | $69K | 0.0% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 13,710 | $64K | 0.0% | 2026-Q2 |
| China Universal Asset Management Co., Ltd. trimmed | 12,736 | $59K | 0.0% | 2026-Q2 |
| PRUDENTIAL FINANCIAL INC added | 12,180 | $57K | 0.0% | 2026-Q2 |
| NEUBERGER BERMAN GROUP LLC new | 12,077 | $56K | 0.0% | 2026-Q2 |
| Sunpointe, LLC | 11,943 | $56K | 0.0% | 2026-Q2 |
| ProShare Advisors LLC trimmed | 11,907 | $55K | 0.0% | 2026-Q2 |
| BLAIR WILLIAM & CO/IL added | 11,325 | $53K | 0.0% | 2026-Q2 |
| Blue Trust, Inc. | 8,700 | $40K | 0.0% | 2026-Q2 |
| Legal & General Group Plc added | 7,082 | $33K | 0.0% | 2026-Q2 |
| Tower Research Capital LLC (TRC) added | 6,203 | $29K | 0.0% | 2026-Q2 |
| Ameritas Investment Partners, Inc. | 5,914 | $28K | 0.0% | 2026-Q2 |
| Arax Advisory Partners added | 4,224 | $20K | 0.0% | 2026-Q2 |
| Versant Capital Management, Inc new | 4,220 | $20K | 0.0% | 2026-Q2 |
| Mirae Asset Global Investments Co., Ltd. trimmed | 3,579 | $17K | 0.0% | 2026-Q2 |
| Smartleaf Asset Management LLC | 3,325 | $15K | 0.0% | 2026-Q2 |
| ROYAL BANK OF CANADA added | 3,218 | $15K | 0.0% | 2026-Q2 |
| SIMPLEX TRADING, LLC trimmed | 2,933 | $14K | 0.0% | 2026-Q2 |
| PNC Financial Services Group, Inc. trimmed | 2,785 | $13K | 0.0% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 2,319 | $11K | 0.0% | 2026-Q2 |
| Rockefeller Capital Management L.P. trimmed | 2,214 | $10K | 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.