Skip to main content

STATE OF WISCONSIN INVESTMENT BOARD

Position in WLK — Westlake Corp

CIK 854157 MADISON, WI

Position in WLK

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$2,615,079
-$334,859 QoQ
Shares Held
35,823
+41.9% QoQ
Ownership
0.028%
of shares outstanding
% of Portfolio
0.01%
of 13F equity value
Holder Rank
#88
of 358 holders
Holding Since
Mar 2020
25 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in WLK Over Time

Shares Held

Position Value (USD)

Position in Specialty Chemicals

Basic Materials · as of Jun 30, 2026

STATE OF WISCONSIN INVESTMENT BOARD holds $394,179,349 across 40 Specialty Chemicals names. WLK ranks #17 (0.7% of the industry book) .

# Ticker Company Shares Value (USD) Open

All Filings in WLK

Export CSV
25 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $2,615,079 35,823
2026-03-31 $2,949,938 25,252
2025-12-31 $1,901,071 25,711
2025-06-30 $1,974,180 26,000
2025-03-31 $2,565,469 25,647
2024-12-31 $2,550,618 22,247
2024-09-30 $3,273,015 21,778
2024-06-30 $2,952,155 20,385
2024-03-31 $11,451,137 74,942
2023-12-31 $10,397,908 74,292
2023-09-30 $4,011,132 32,174
2023-06-30 $4,151,701 34,751
2023-03-31 $4,521,132 38,982
2022-12-31 $1,962,410 19,138
2022-09-30 $1,875,044 21,582
2022-06-30 $2,581,062 26,332
2022-03-31 $520,131 4,215
2021-12-31 $391,531 4,031
2021-09-30 $378,868 4,157
2021-06-30 $356,396 3,956
2021-03-31 $381,708 4,299
2020-12-31 $494,496 6,060
2020-09-30 $394,492 6,240
2020-06-30 $329,947 6,150
2020-03-31 $701,411 18,376