Alliancebernstein L.P.
· Exited
Change
−1.5M
Δ Own
−100.0%
Date
Q1 2026
LE
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Alliancebernstein L.P.
· Exited
Change
−1.5M
Δ Own
−100.0%
Date
Q1 2026
|
Alliancebernstein L.P. | Exited· Q1 2026 | – | −1.5M | −100.0% | Q1 2026 | |||||
|
Braidwell LP
· Exited
Change
−1.3M
Δ Own
−100.0%
Date
Q1 2026
|
Braidwell LP | Exited· Q1 2026 | – | −1.3M | −100.0% | Q1 2026 | |||||
|
Goldman Sachs Group Inc
· Reduced
Change
−710K
Date
Q1 2026
|
Goldman Sachs Group Inc | Reduced· Q1 2026 | – | −710K | – | Q1 2026 | |||||
|
Two Sigma Advisers, LP
· Exited
Change
−690K
Δ Own
−100.0%
Date
Q1 2026
|
Two Sigma Advisers, LP | Exited· Q1 2026 | – | −690K | −100.0% | Q1 2026 | |||||
|
JPMorgan Chase & Co
· Reduced
Change
−658K
Date
Q1 2026
|
JPMorgan Chase & Co | Reduced· Q1 2026 | – | −658K | – | Q1 2026 | |||||
|
Marshall Wace, LLP
· Reduced
Change
−469K
Date
Q1 2026
|
Marshall Wace, LLP | Reduced· Q1 2026 | – | −469K | – | Q1 2026 | |||||
|
Eagle Health Investments LP
· Exited
Change
−409K
Δ Own
−100.0%
Date
Q1 2026
|
Eagle Health Investments LP | Exited· Q1 2026 | – | −409K | −100.0% | Q1 2026 | |||||
|
Westfield Capital Management Co LP
· Reduced
Change
−401K
Date
Q1 2026
|
Westfield Capital Management Co LP | Reduced· Q1 2026 | – | −401K | – | Q1 2026 | |||||
|
Balyasny Asset Management L.P.
· Exited
Change
−344K
Δ Own
−100.0%
Date
Q1 2026
|
Balyasny Asset Management L.P. | Exited· Q1 2026 | – | −344K | −100.0% | Q1 2026 | |||||
|
Capital International Investors
· Reduced
Change
−294K
Date
Q1 2026
|
Capital International Investors | Reduced· Q1 2026 | – | −294K | – | Q1 2026 | |||||
|
Jane Street Group, LLC
· Exited
Change
−238K
Δ Own
−100.0%
Date
Q1 2026
|
Jane Street Group, LLC | Exited· Q1 2026 | – | −238K | −100.0% | Q1 2026 | |||||
|
Casdin Capital, LLC
· Exited
Change
−215K
Δ Own
−100.0%
Date
Q1 2026
|
Casdin Capital, LLC | Exited· Q1 2026 | – | −215K | −100.0% | Q1 2026 | |||||
|
Panagora Asset Management Inc
· Exited
Change
−140K
Δ Own
−100.0%
Date
Q1 2026
|
Panagora Asset Management Inc | Exited· Q1 2026 | – | −140K | −100.0% | Q1 2026 | |||||
|
Bank of America Corp
· Reduced
Change
−110K
Date
Q1 2026
|
Bank of America Corp | Reduced· Q1 2026 | – | −110K | – | Q1 2026 | |||||
|
Barclays PLC
· Reduced
Change
−94K
Date
Q1 2026
|
Barclays PLC | Reduced· Q1 2026 | – | −94K | – | Q1 2026 | |||||
| Insider | Title | Type | Price | Qty | Value | Owned | ΔOwn | Trade date | Filed date | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Casey Patrick John
· Director
Sell
−$89K
|
Casey Patrick John | Director | Sell | $14.80 | −6K | −$89K | 49K | −11.0% | Jun 30, 2026 | Jul 2, 2026 | |||||||||
|
Huang Ying
· Director
Gift (G)
-3K
|
Huang Ying | Director | Gift (G) | – | -3K | – | 238K | −1.4% | Jun 30, 2026 | Jul 2, 2026 | |||||||||
|
Huang Ying
· Director
Sell
−$82K
|
Huang Ying | Director | Sell | $14.78 | −6K | −$82K | 242K | −2.2% | Jun 25, 2026 | Jun 29, 2026 | |||||||||
|
Huang Ying
· Director, Officer
Sell
−$87K
|
Huang Ying | Director, Officer | Sell | $8.77 | −10K | −$87K | 247K | – | Mar 25, 2026 | Mar 27, 2026 | |||||||||
N
A
M
M
G
A
197 reporting institutions disclosed LEGN 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.