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RHUMBLINE ADVISERS

Position in WLK — Westlake Corp

CIK 1115418 BOSTON, MA

Position in WLK

as of Jun 30, 2026 · filed Aug 12, 2026
Position Value
$6,300,265
-$3,898,588 QoQ
Shares Held
86,305
-1.1% QoQ
Ownership
0.068%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#63
of 358 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority Sole 52% Shared 0% None 48%

Common Shares in WLK Over Time

Shares Held

Position Value (USD)

Position in Specialty Chemicals

Basic Materials · as of Jun 30, 2026

RHUMBLINE ADVISERS holds $1,281,123,997 across 50 Specialty Chemicals names. WLK ranks #27 (0.5% of the industry book) .

# Ticker Company Shares Value (USD) Open

All Filings in WLK

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26 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $6,300,265 86,305
2026-03-31 $10,198,853 87,304
2025-12-31 $6,316,842 85,432
2025-09-30 $6,847,474 88,859
2025-06-30 $6,881,384 90,628
2025-03-31 $10,046,913 100,439
2024-12-31 $11,242,120 98,056
2024-09-30 $14,122,450 93,968
2024-06-30 $16,276,030 112,388
2024-03-31 $14,435,321 94,472
2023-12-31 $13,404,529 95,774
2023-09-30 $12,156,447 97,509
2023-06-30 $12,286,055 102,838
2023-03-31 $11,814,650 101,868
2022-12-31 $10,525,628 102,649
2022-09-30 $3,328,199 38,308
2022-06-30 $3,508,037 35,789
2022-03-31 $3,684,970 29,862
2021-12-31 $3,137,590 32,303
2021-09-30 $2,871,365 31,505
2021-06-30 $2,939,456 32,628
2021-03-31 $3,159,325 35,582
2020-12-31 $3,016,262 36,964
2020-09-30 $2,211,941 34,988
2020-06-30 $1,964,609 36,619
2020-03-31 $1,508,745 39,527