Westlake Corp
339 hedge funds and large institutions have $5.15B invested in Westlake Corp in 2026 Q1 according to their latest regulatory filings, with 93 funds opening new positions, 117 increasing their positions, 87 reducing their positions, and 47 closing their positions.
98% more first-time investments, than exits
New positions opened: 93 | Existing positions closed: 47
58% more call options, than puts
Call options by funds: $26.7M | Put options by funds: $16.9M
50% more capital invested
Capital invested by funds: $3.43B → $5.15B (+$1.72B)
34% more repeat investments, than reductions
Existing positions increased: 117 | Existing positions reduced: 87
14% more funds holding
Funds holding: 298 → 339 (+41)
0% more funds holding in top 10
Funds holding in top 10: 3 → 3 (0)
1.69% less ownership
Funds ownership: 36.17% → 34.49% (-1.7%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Capital World Investors
Los Angeles,
California
|
+$198M |
| 2 |
Fidelity Investments
Boston,
Massachusetts
|
+$105M |
| 3 |
OAG
Orbis Allan Gray
Hamilton,
Bermuda
|
+$87.9M |
| 4 |
Goldman Sachs
New York
|
+$62M |
| 5 |
Citadel Advisors
Miami,
Florida
|
+$49.7M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Wellington Management Group
Boston,
Massachusetts
|
-$235M |
| 2 |
Victory Capital Management
San Antonio,
Texas
|
-$104M |
| 3 |
TSW
Thompson Siegel & Walmsley
Richmond,
Virginia
|
-$51.7M |
| 4 |
Holocene Advisors
New York
|
-$47.6M |
| 5 |
Dimensional Fund Advisors
Austin,
Texas
|
-$40.7M |
WLK Hedge Fund Activity: Q1 2026 in Review
339 of the 8,187 institutional investors tracked by Wall St. Rank reported a position in Westlake Corp (WLK) for Q1 2026, worth a combined $5.15B — up 50% from $3.43B a quarter earlier.
Buyers outnumbered sellers: 93 funds opened new WLK positions and 47 closed out — a net gain of 46 holders — while 117 added to existing stakes and 87 trimmed.
The largest buyer was Capital World Investors, adding an estimated $198M. The largest seller was Wellington Management Group, cutting an estimated $235M.
- 339 institutional investors held Westlake Corp (WLK) as of Q1 2026, up from 298 in Q4 2025.
- Funds reported $5.15B of Westlake Corp stock for Q1 2026, up 50% quarter-over-quarter.
- 93 funds opened new Westlake Corp positions in Q1 2026 and 47 closed out, a net change of +46 holders.
- The largest Westlake Corp buyer in Q1 2026 was Capital World Investors, an estimated $198M added.
- The largest Westlake Corp seller in Q1 2026 was Wellington Management Group, an estimated $235M sold.
Based on aggregated 13F filings for Q1 2026.