Capital World Investors
· Reduced
−$1.9B
Change
−5.5M
Date
Q1 2026
AL
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Capital World Investors
· Reduced
−$1.9B
Change
−5.5M
Date
Q1 2026
|
Capital World Investors | Reduced· Q1 2026 | −$1.9B | −5.5M | – | Q1 2026 | |||||
|
Norges
· Exited
−$766M
Change
−2.3M
Δ Own
−100.0%
Date
Q1 2026
|
Norges | Exited· Q1 2026 | −$766M | −2.3M | −100.0% | Q1 2026 | |||||
|
FMR LLC
· Reduced
−$450M
Change
−1.3M
Δ Own
−8.3%
Date
Q1 2026
|
FMR LLC | Reduced· Q1 2026 | −$450M | −1.3M | −8.3% | Q1 2026 | |||||
|
Two Sigma Advisers, LP
· Exited
−$385M
Change
−1.1M
Δ Own
−100.0%
Date
Q1 2026
|
Two Sigma Advisers, LP | Exited· Q1 2026 | −$385M | −1.1M | −100.0% | Q1 2026 | |||||
|
Arrowstreet Capital, Limited Partnership
· Exited
−$383M
Change
−1.1M
Δ Own
−100.0%
Date
Q1 2026
|
Arrowstreet Capital, Limited Partnership | Exited· Q1 2026 | −$383M | −1.1M | −100.0% | Q1 2026 | |||||
|
Invesco Ltd.
· Reduced
−$297M
Change
−874K
Δ Own
−40.4%
Date
Q1 2026
|
Invesco Ltd. | Reduced· Q1 2026 | −$297M | −874K | −40.4% | Q1 2026 | |||||
|
1832 Asset Management L.P.
· Exited
−$150M
Change
−440K
Δ Own
−100.0%
Date
Q1 2026
|
1832 Asset Management L.P. | Exited· Q1 2026 | −$150M | −440K | −100.0% | Q1 2026 | |||||
|
UBS Group AG
· Reduced
−$125M
Change
−367K
Date
Q1 2026
|
UBS Group AG | Reduced· Q1 2026 | −$125M | −367K | – | Q1 2026 | |||||
|
Kbc Group NV
· Reduced
−$111M
Change
−328K
Date
Q1 2026
|
Kbc Group NV | Reduced· Q1 2026 | −$111M | −328K | – | Q1 2026 | |||||
|
Jane Street Group, LLC
· Reduced
−$104M
Change
−305K
Date
Q1 2026
|
Jane Street Group, LLC | Reduced· Q1 2026 | −$104M | −305K | – | Q1 2026 | |||||
|
Worldquant Millennium Advisors LLC
· Reduced
−$102M
Change
−301K
Date
Q1 2026
|
Worldquant Millennium Advisors LLC | Reduced· Q1 2026 | −$102M | −301K | – | Q1 2026 | |||||
|
Orbis Allan Gray Ltd
· Reduced
−$96M
Change
−283K
Date
Q1 2026
|
Orbis Allan Gray Ltd | Reduced· Q1 2026 | −$96M | −283K | – | Q1 2026 | |||||
|
Jennison Associates LLC
· Exited
−$94M
Change
−278K
Δ Own
−100.0%
Date
Q1 2026
|
Jennison Associates LLC | Exited· Q1 2026 | −$94M | −278K | −100.0% | Q1 2026 | |||||
|
T. Rowe Price Associates
· Reduced
−$92M
Change
−270K
Date
Q1 2026
|
T. Rowe Price Associates | Reduced· Q1 2026 | −$92M | −270K | – | Q1 2026 | |||||
|
Nuveen, LLC
· Reduced
−$83M
Change
−244K
Date
Q1 2026
|
Nuveen, LLC | Reduced· Q1 2026 | −$83M | −244K | – | Q1 2026 | |||||
| Insider | Title | Type | Price | Qty | Value | Owned | ΔOwn | Trade date | Filed date | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Pyott David E. I.
· Director
5 operations
−$1.1M
|
Pyott David E. I. | Director | 5 operations | $297.71–$302.65 | −4K | −$1.1M | 2K | – | Jun 1, 2026 | Jun 3, 2026 | |||||||||
|
Pyott David E. I.
· Director
2 operations
0
|
Pyott David E. I. | Director | 2 operations | – | 0 | – | 0 | – | Jun 1, 2026 | Jun 3, 2026 | |||||||||
|
Cravatt Benjamin
· Director
Grant (A)
4K
|
Cravatt Benjamin | Director | Grant (A) | – | 4K | – | 4K | – | Jun 1, 2026 | Jun 3, 2026 | |||||||||
|
Sigal Charles Elliott
· Director
2 operations
2K
|
Sigal Charles Elliott | Director | 2 operations | – | 2K | – | 1K | – | May 20, 2026 | May 22, 2026 | |||||||||
|
Schulman Amy W.
· Director
2 operations
3K
|
Schulman Amy W. | Director | 2 operations | – | 3K | – | 2K | – | May 20, 2026 | May 22, 2026 | |||||||||
|
Reitan Colleen F.
· Director
2 operations
2K
|
Reitan Colleen F. | Director | 2 operations | – | 2K | – | 1K | – | May 20, 2026 | May 22, 2026 | |||||||||
|
Pyott David E. I.
· Director
2 operations
2K
|
Pyott David E. I. | Director | 2 operations | – | 2K | – | 1K | – | May 20, 2026 | May 22, 2026 | |||||||||
|
Kellogg Peter N.
· Director
2 operations
2K
|
Kellogg Peter N. | Director | 2 operations | – | 2K | – | 1K | – | May 20, 2026 | May 22, 2026 | |||||||||
|
Hamburg Margaret A.
· Director
2 operations
2K
|
Hamburg Margaret A. | Director | 2 operations | – | 2K | – | 1K | – | May 20, 2026 | May 22, 2026 | |||||||||
|
Brandicourt Olivier
· Director
2 operations
2K
|
Brandicourt Olivier | Director | 2 operations | – | 2K | – | 1K | – | May 20, 2026 | May 22, 2026 | |||||||||
|
Ausiello Dennis A.
· Director
2 operations
2K
|
Ausiello Dennis A. | Director | 2 operations | – | 2K | – | 1K | – | May 20, 2026 | May 22, 2026 | |||||||||
|
Arbuckle Stuart A.
· Director
2 operations
2K
|
Arbuckle Stuart A. | Director | 2 operations | – | 2K | – | 1K | – | May 20, 2026 | May 22, 2026 | |||||||||
|
Schulman Amy W.
· Director
2 operations
0
|
Schulman Amy W. | Director | 2 operations | $70.20 | 0 | – | 0 | – | May 13, 2026 | May 14, 2026 | |||||||||
|
McLaughlin Melissa
· Officer
5 operations
−$755K
|
McLaughlin Melissa | Officer | 5 operations | $320.14–$333.94 | −2K | −$755K | 9K | – | Apr 6, 2026 | Apr 7, 2026 | |||||||||
|
McLaughlin Melissa
· Officer
9 operations
−$519K
|
McLaughlin Melissa | Officer | 9 operations | $316.61–$325.49 | −2K | −$519K | 12K | – | Apr 2, 2026 | Apr 7, 2026 | |||||||||
N
M
G
A
A
A
820 reporting institutions disclosed ALNY 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.