Prosight Management, LP
· Added
Change
+476K
Date
Q1 2026
GL
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Prosight Management, LP
· Added
Change
+476K
Date
Q1 2026
|
Prosight Management, LP | Added· Q1 2026 | – | +476K | – | Q1 2026 | |||||
|
Madison Avenue Partners, LP
· Added
Change
+252K
Date
Q1 2026
|
Madison Avenue Partners, LP | Added· Q1 2026 | – | +252K | – | Q1 2026 | |||||
|
Old Mission Capital LLC
· New
Change
+96K
Date
Q1 2026
|
Old Mission Capital LLC | New· Q1 2026 | – | +96K | – | Q1 2026 | |||||
|
Tower Research Capital LLC (trc)
· Added
Change
+66K
Date
Q1 2026
|
Tower Research Capital LLC (trc) | Added· Q1 2026 | – | +66K | – | Q1 2026 | |||||
|
Hrt Financial LP
· New
Change
+45K
Date
Q1 2026
|
Hrt Financial LP | New· Q1 2026 | – | +45K | – | Q1 2026 | |||||
|
Acadian Asset Management LLC
· Added
Change
+38K
Date
Q1 2026
|
Acadian Asset Management LLC | Added· Q1 2026 | – | +38K | – | Q1 2026 | |||||
|
Citadel Advisors LLC
· Added
Change
+35K
Δ Own
+39.2%
Date
Q1 2026
|
Citadel Advisors LLC | Added· Q1 2026 | – | +35K | +39.2% | Q1 2026 | |||||
|
Goldman Sachs Group Inc
· Added
Change
+34K
Date
Q1 2026
|
Goldman Sachs Group Inc | Added· Q1 2026 | – | +34K | – | Q1 2026 | |||||
|
Man Group PLC
· Added
Change
+33K
Date
Q1 2026
|
Man Group PLC | Added· Q1 2026 | – | +33K | – | Q1 2026 | |||||
|
Optiver Holding B.V.
· New
Change
+27K
Date
Q1 2026
|
Optiver Holding B.V. | New· Q1 2026 | – | +27K | – | Q1 2026 | |||||
|
Jane Street Group, LLC
· New
Change
+14K
Date
Q1 2026
|
Jane Street Group, LLC | New· Q1 2026 | – | +14K | – | Q1 2026 | |||||
|
Squarepoint Ops LLC
· New
Change
+13K
Date
Q1 2026
|
Squarepoint Ops LLC | New· Q1 2026 | – | +13K | – | Q1 2026 | |||||
|
Abc Arbitrage SA
· New
Change
+13K
Date
Q1 2026
|
Abc Arbitrage SA | New· Q1 2026 | – | +13K | – | Q1 2026 | |||||
|
American Century Companies Inc
· Added
Change
+12K
Date
Q1 2026
|
American Century Companies Inc | Added· Q1 2026 | – | +12K | – | Q1 2026 | |||||
|
Denkapparat Operations GMBH
· New
Change
+11K
Date
Q1 2026
|
Denkapparat Operations GMBH | New· Q1 2026 | – | +11K | – | Q1 2026 | |||||
N
M
A
A
T
U
90 reporting institutions disclosed GLPG 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.