Acadian Asset Management LLC
· Added
Change
+5.8M
Date
Q1 2026
UM
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Acadian Asset Management LLC
· Added
Change
+5.8M
Date
Q1 2026
|
Acadian Asset Management LLC | Added· Q1 2026 | – | +5.8M | – | Q1 2026 | |||||
|
AQR Capital Management LLC
· Added
Change
+5.2M
Date
Q1 2026
|
AQR Capital Management LLC | Added· Q1 2026 | – | +5.2M | – | Q1 2026 | |||||
|
Qube Research & Technologies Ltd
· Added
Change
+4.8M
Date
Q1 2026
|
Qube Research & Technologies Ltd | Added· Q1 2026 | – | +4.8M | – | Q1 2026 | |||||
|
Marshall Wace, LLP
· Reduced
Change
−4.5M
Date
Q1 2026
|
Marshall Wace, LLP | Reduced· Q1 2026 | – | −4.5M | – | Q1 2026 | |||||
|
Two Sigma Investments, LP
· Added
Change
+4.0M
Δ Own
+70.1%
Date
Q1 2026
|
Two Sigma Investments, LP | Added· Q1 2026 | – | +4.0M | +70.1% | Q1 2026 | |||||
|
Schroder Investment Management Group
· Reduced
Change
−3.8M
Date
Q1 2026
|
Schroder Investment Management Group | Reduced· Q1 2026 | – | −3.8M | – | Q1 2026 | |||||
|
Man Group PLC
· Added
Change
+3.6M
Date
Q1 2026
|
Man Group PLC | Added· Q1 2026 | – | +3.6M | – | Q1 2026 | |||||
|
UBS Group AG
· Added
Change
+3.6M
Date
Q1 2026
|
UBS Group AG | Added· Q1 2026 | – | +3.6M | – | Q1 2026 | |||||
|
Two Sigma Advisers, LP
· Exited
Change
−3.4M
Δ Own
−100.0%
Date
Q1 2026
|
Two Sigma Advisers, LP | Exited· Q1 2026 | – | −3.4M | −100.0% | Q1 2026 | |||||
|
Bank of America Corp
· Reduced
Change
−3.0M
Date
Q1 2026
|
Bank of America Corp | Reduced· Q1 2026 | – | −3.0M | – | Q1 2026 | |||||
|
Jane Street Group, LLC
· Added
Change
+2.1M
Date
Q1 2026
|
Jane Street Group, LLC | Added· Q1 2026 | – | +2.1M | – | Q1 2026 | |||||
|
Balyasny Asset Management L.P.
· Exited
Change
−2.0M
Δ Own
−100.0%
Date
Q1 2026
|
Balyasny Asset Management L.P. | Exited· Q1 2026 | – | −2.0M | −100.0% | Q1 2026 | |||||
|
Empowered Funds, LLC
· Exited
Change
−1.5M
Δ Own
−100.0%
Date
Q1 2026
|
Empowered Funds, LLC | Exited· Q1 2026 | – | −1.5M | −100.0% | Q1 2026 | |||||
|
Rafferty Asset Management, LLC
· Reduced
Change
−1.5M
Date
Q1 2026
|
Rafferty Asset Management, LLC | Reduced· Q1 2026 | – | −1.5M | – | Q1 2026 | |||||
|
Tidal Investments LLC
· Added
Change
+1.4M
Date
Q1 2026
|
Tidal Investments LLC | Added· Q1 2026 | – | +1.4M | – | Q1 2026 | |||||
| Insider | Title | Type | Price | Qty | Value | Owned | ΔOwn | Trade date | Filed date | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Liu Chitung
· Officer
Sell
−$294M
|
Liu Chitung | Officer | Sell | $154.89 | −1.9M | −$294M | 3.3M | −36.4% | Jul 13, 2026 | Jul 13, 2026 | |||||||||
|
Hu Che-Jen
· Officer
Sell
−$1.7M
|
Hu Che-Jen | Officer | Sell | $171.30 | −10K | −$1.7M | 3.2M | −0.3% | Jun 30, 2026 | Jun 30, 2026 | |||||||||
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288 reporting institutions disclosed UMC 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.