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CITADEL ADVISORS LLC

Position in WLK — Westlake Corp

CIK 1423053 MIAMI, FL

Position in WLK

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$77,005,364
-$6,589,392 QoQ
Shares Held
1,054,868
+47.4% QoQ
Ownership
0.825%
of shares outstanding
% of Portfolio
0.05%
of 13F equity value
Holder Rank
#12
of 358 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in WLK Over Time

Shares Held

Position Value (USD)

Derivatives in WLK

reported options exposure · as of Jun 30, 2026
CallValue
$5,387,400
CallShares
73,800
PutValue
$1,664,400
PutShares
22,800

Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.

Position in Specialty Chemicals

Basic Materials · as of Jun 30, 2026

CITADEL ADVISORS LLC holds $1,679,326,621 across 48 Specialty Chemicals names. WLK ranks #8 (4.6% of the industry book) .

# Ticker Company Shares Value (USD) Open
8 WLK
Westlake Corp
This page
1,054,868 $77,005,364

All Filings in WLK

Export CSV
50 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $77,005,364 1,054,868
2026-06-30 $5,387,400 73,800
2026-06-30 $1,664,400 22,800
2026-03-31 $83,594,756 715,586
2026-03-31 $7,301,250 62,500
2026-03-31 $8,072,262 69,100
2025-12-31 $7,756,306 104,900
2025-12-31 $15,032,223 203,303
2025-12-31 $4,332,884 58,600
2025-09-30 $4,276,830 55,500
2025-09-30 $1,356,256 17,600
2025-09-30 $92,537,577 1,200,851
2025-06-30 $934,394 12,306
2025-06-30 $3,378,885 44,500
2025-06-30 $2,141,226 28,200
2025-03-31 $4,591,377 45,900
2025-03-31 $85,311,185 852,856
2025-03-31 $1,140,342 11,400
2024-12-31 $77,999,949 680,331
2024-12-31 $5,434,410 47,400
2024-12-31 $4,597,465 40,100
2024-09-30 $9,287,922 61,800
2024-09-30 $5,936,455 39,500
2024-09-30 $78,805,012 524,353
2024-06-30 $4,721,132 32,600
2024-06-30 $83,703,497 577,983
2024-06-30 $6,227,260 43,000
2024-03-31 $85,899,576 562,170
2024-03-31 $2,185,040 14,300
2024-03-31 $8,373,440 54,800
2023-12-31 $81,243,700 580,478
2023-12-31 $2,673,236 19,100
2023-12-31 $1,903,456 13,600
2023-09-30 $96,077,434 770,654
2023-09-30 $1,907,451 15,300
2023-09-30 $4,762,394 38,200
2023-06-30 $3,572,153 29,900
2023-06-30 $99,560,204 833,349
2023-06-30 $6,081,023 50,900
2023-03-31 $3,131,460 27,000
2023-03-31 $142,235,088 1,226,376
2023-03-31 $2,110,836 18,200
2022-12-31 $4,583,538 44,700
2022-12-31 $36,410,005 355,081
2022-12-31 $4,060,584 39,600
2022-09-30 $2,657,223 30,585
2022-09-30 $10,408,224 119,800
2022-09-30 $2,615,088 30,100
2022-06-30 $3,803,176 38,800
2022-06-30 $5,057,832 51,600