First Beijing Investment Ltd
· New
Change
+2.3M
Date
Q1 2026
LE
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
First Beijing Investment Ltd
· New
Change
+2.3M
Date
Q1 2026
|
First Beijing Investment Ltd | New· Q1 2026 | – | +2.3M | – | Q1 2026 | |||||
|
Deerfield Management Company, L.P.
· Added
Change
+1.8M
Date
Q1 2026
|
Deerfield Management Company, L.P. | Added· Q1 2026 | – | +1.8M | – | Q1 2026 | |||||
|
Kynam Capital Management, LP
· New
Change
+1.6M
Date
Q1 2026
|
Kynam Capital Management, LP | New· Q1 2026 | – | +1.6M | – | Q1 2026 | |||||
|
FMR LLC
· Added
Change
+1.4M
Δ Own
+5.9%
Date
Q1 2026
|
FMR LLC | Added· Q1 2026 | – | +1.4M | +5.9% | Q1 2026 | |||||
|
Two Sigma Investments, LP
· Added
Change
+1.4M
Δ Own
+259.3%
Date
Q1 2026
|
Two Sigma Investments, LP | Added· Q1 2026 | – | +1.4M | +259.3% | Q1 2026 | |||||
|
Point72 Asset Management, L.P.
· Added
Change
+1.1M
Δ Own
+39.5%
Date
Q1 2026
|
Point72 Asset Management, L.P. | Added· Q1 2026 | – | +1.1M | +39.5% | Q1 2026 | |||||
|
Patient Square Capital LP
· New
Change
+990K
Date
Q1 2026
|
Patient Square Capital LP | New· Q1 2026 | – | +990K | – | Q1 2026 | |||||
|
Suvretta Capital Management, LLC
· Added
Change
+972K
Date
Q1 2026
|
Suvretta Capital Management, LLC | Added· Q1 2026 | – | +972K | – | Q1 2026 | |||||
|
Acadian Asset Management LLC
· Added
Change
+945K
Date
Q1 2026
|
Acadian Asset Management LLC | Added· Q1 2026 | – | +945K | – | Q1 2026 | |||||
|
BlackRock
· Added
Change
+408K
Date
Q1 2026
|
BlackRock | Added· Q1 2026 | – | +408K | – | Q1 2026 | |||||
|
Triata Capital Ltd
· Added
Change
+377K
Date
Q1 2026
|
Triata Capital Ltd | Added· Q1 2026 | – | +377K | – | Q1 2026 | |||||
|
Citadel Advisors LLC
· Added
Change
+339K
Δ Own
+190.4%
Date
Q1 2026
|
Citadel Advisors LLC | Added· Q1 2026 | – | +339K | +190.4% | Q1 2026 | |||||
|
Arrowstreet Capital, Limited Partnership
· Added
Change
+315K
Date
Q1 2026
|
Arrowstreet Capital, Limited Partnership | Added· Q1 2026 | – | +315K | – | Q1 2026 | |||||
|
Hudson Bay Capital Management LP
· Added
Change
+301K
Date
Q1 2026
|
Hudson Bay Capital Management LP | Added· Q1 2026 | – | +301K | – | Q1 2026 | |||||
|
Davern Capital Partners, LP
· Added
Change
+258K
Date
Q1 2026
|
Davern Capital Partners, LP | Added· Q1 2026 | – | +258K | – | 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.