FMR LLC
· Added
Change
+2.3M
Δ Own
+23.5%
Date
Q1 2026
AV
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
FMR LLC
· Added
Change
+2.3M
Δ Own
+23.5%
Date
Q1 2026
|
FMR LLC | Added· Q1 2026 | – | +2.3M | +23.5% | Q1 2026 | |||||
|
Rosalind Advisors, Inc.
· New
Change
+1.2M
Date
Q1 2026
|
Rosalind Advisors, Inc. | New· Q1 2026 | – | +1.2M | – | Q1 2026 | |||||
|
Two Sigma Investments, LP
· Added
Change
+1.1M
Δ Own
+150.1%
Date
Q1 2026
|
Two Sigma Investments, LP | Added· Q1 2026 | – | +1.1M | +150.1% | Q1 2026 | |||||
|
Two Sigma Advisers, LP
· Exited
Change
−1.1M
Δ Own
−100.0%
Date
Q1 2026
|
Two Sigma Advisers, LP | Exited· Q1 2026 | – | −1.1M | −100.0% | Q1 2026 | |||||
|
Bml Capital Management, LLC
· Reduced
Change
−431K
Date
Q1 2026
|
Bml Capital Management, LLC | Reduced· Q1 2026 | – | −431K | – | Q1 2026 | |||||
|
JPMorgan Chase & Co
· Reduced
Change
−408K
Date
Q1 2026
|
JPMorgan Chase & Co | Reduced· Q1 2026 | – | −408K | – | Q1 2026 | |||||
|
Millennium Management LLC
· Reduced
Change
−348K
Date
Q1 2026
|
Millennium Management LLC | Reduced· Q1 2026 | – | −348K | – | Q1 2026 | |||||
|
Irenic Capital Management LP
· New
Change
+302K
Date
Q1 2026
|
Irenic Capital Management LP | New· Q1 2026 | – | +302K | – | Q1 2026 | |||||
|
Acadian Asset Management LLC
· Added
Change
+279K
Date
Q1 2026
|
Acadian Asset Management LLC | Added· Q1 2026 | – | +279K | – | Q1 2026 | |||||
|
Arrowstreet Capital, Limited Partnership
· New
Change
+211K
Date
Q1 2026
|
Arrowstreet Capital, Limited Partnership | New· Q1 2026 | – | +211K | – | Q1 2026 | |||||
|
Wellington Management Group LLP
· Reduced
Change
−186K
Δ Own
−76.5%
Date
Q1 2026
|
Wellington Management Group LLP | Reduced· Q1 2026 | – | −186K | −76.5% | Q1 2026 | |||||
|
Jane Street Group, LLC
· Added
Change
+168K
Date
Q1 2026
|
Jane Street Group, LLC | Added· Q1 2026 | – | +168K | – | Q1 2026 | |||||
|
Peapod Lane Capital LLC
· Reduced
Change
−162K
Date
Q1 2026
|
Peapod Lane Capital LLC | Reduced· Q1 2026 | – | −162K | – | Q1 2026 | |||||
|
Opaleye Management Inc.
· Added
Change
+143K
Date
Q1 2026
|
Opaleye Management Inc. | Added· Q1 2026 | – | +143K | – | Q1 2026 | |||||
|
BNP Paribas Financial Markets
· Added
Change
+132K
Date
Q1 2026
|
BNP Paribas Financial Markets | Added· Q1 2026 | – | +132K | – | Q1 2026 | |||||
| Insider | Title | Type | Price | Qty | Value | Owned | ΔOwn | Trade date | Filed date | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Lucidi Bruno
· Director
2 operations
0
|
Lucidi Bruno | Director | 2 operations | – | 0 | – | 0 | – | Jun 18, 2026 | Jun 23, 2026 | |||||||||
|
Lucidi Bruno
· Director
2 operations
64K
|
Lucidi Bruno | Director | 2 operations | – | 64K | – | 38K | – | Jun 18, 2026 | Jun 23, 2026 | |||||||||
|
Berger Franklin M.
· Director
2 operations
0
|
Berger Franklin M. | Director | 2 operations | – | 0 | – | 0 | – | Jun 18, 2026 | Jun 23, 2026 | |||||||||
|
Berger Franklin M.
· Director
2 operations
64K
|
Berger Franklin M. | Director | 2 operations | – | 64K | – | 38K | – | Jun 18, 2026 | Jun 23, 2026 | |||||||||
|
Berman Howard
· Director
2 operations
64K
|
Berman Howard | Director | 2 operations | – | 64K | – | 38K | – | Jun 18, 2026 | Jun 23, 2026 | |||||||||
|
Duncan Barbara Gayle
· Director
2 operations
0
|
Duncan Barbara Gayle | Director | 2 operations | – | 0 | – | 0 | – | Jun 18, 2026 | Jun 23, 2026 | |||||||||
|
Duncan Barbara Gayle
· Director
2 operations
64K
|
Duncan Barbara Gayle | Director | 2 operations | – | 64K | – | 38K | – | Jun 18, 2026 | Jun 23, 2026 | |||||||||
|
Polsky Bruce
· Director
2 operations
0
|
Polsky Bruce | Director | 2 operations | – | 0 | – | 0 | – | Jun 18, 2026 | Jun 23, 2026 | |||||||||
|
Polsky Bruce
· Director
2 operations
64K
|
Polsky Bruce | Director | 2 operations | – | 64K | – | 38K | – | Jun 18, 2026 | Jun 23, 2026 | |||||||||
|
Murphy Polly A.
· Director
2 operations
0
|
Murphy Polly A. | Director | 2 operations | – | 0 | – | 0 | – | Jun 18, 2026 | Jun 23, 2026 | |||||||||
|
Murphy Polly A.
· Director
2 operations
64K
|
Murphy Polly A. | Director | 2 operations | – | 64K | – | 38K | – | Jun 18, 2026 | Jun 23, 2026 | |||||||||
|
Adams Jerome M.
· Director
2 operations
0
|
Adams Jerome M. | Director | 2 operations | – | 0 | – | 0 | – | Jun 18, 2026 | Jun 23, 2026 | |||||||||
|
Adams Jerome M.
· Director
2 operations
64K
|
Adams Jerome M. | Director | 2 operations | – | 64K | – | 38K | – | Jun 18, 2026 | Jun 23, 2026 | |||||||||
|
Kirsch Arthur S.
· Director
2 operations
64K
|
Kirsch Arthur S. | Director | 2 operations | – | 64K | – | 38K | – | Jun 18, 2026 | Jun 23, 2026 | |||||||||
|
Corcoran Andrea
· Officer
2 operations
120K
|
Corcoran Andrea | Officer | 2 operations | $1.24 | 120K | – | 0 | – | Mar 11, 2026 | Mar 13, 2026 | |||||||||
N
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108 reporting institutions disclosed AVIR position changes in the Q1 2026 snapshot.
For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q1 2026.
An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.
Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.
Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.
A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.