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WLK in the 13F filings

Westlake Corporation · CUSIP 960413102

Sector · Materials
Quarter
Q2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023Q3 2023
Quarter end
30 Jun 2026
the date the book describes
Filed
2 Sep 2026
latest of these filings; the earliest 3 Aug 2026
Managers listing it
33
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q1 2026 and Q2 2026; 8 listed it in both
Shares listed
11,478,217
combined, among listed positions
Reported value
$841m
combined, at the quarter end

AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.

Among the 91 comparable managers: 20 buyers (opened or added shares) and 14 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -2,064,204.

Managers listing WLK in Q2 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q1 2026, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

33 of 33 holders

ActionFiling
Capital World Investors2,842,348$207munder 0.1%Trimmed-1,368,65812 Aug 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc2,206,676$161munder 0.1%Trimmed-200,78114 Aug 2026 (the filing on sec.gov)
AQR Capital Management LLC1,570,453$115munder 0.1%Added+1,310,38314 Aug 2026 (the filing on sec.gov)
Citadel Advisors LLC1,054,868$77munder 0.1%Added+339,2822 Sep 2026 (the filing on sec.gov)
Balyasny Asset Management LLC625,859$46m0.06%Added+256,18714 Aug 2026 (the filing on sec.gov)
Woodline Partners LP451,986$33m0.10%Added+114,91114 Aug 2026 (the filing on sec.gov)
Millennium Management LLC366,074$27munder 0.1%Added+281,07714 Aug 2026 (the filing on sec.gov)
Fidelity (FMR LLC)361,243$26munder 0.1%Trimmed-951,23013 Aug 2026 (the filing on sec.gov)
ExodusPoint Capital Management LP327,195$24m0.15%Newnew14 Aug 2026 (the filing on sec.gov)
Janus Henderson Group Ltd267,748$20munder 0.1%Trimmed-2,03514 Aug 2026 (the filing on sec.gov)
D. E. Shaw & Co.200,534$15munder 0.1%Trimmed-32,64914 Aug 2026 (the filing on sec.gov)
Invesco Ltd190,951$14munder 0.1%Added+11,54914 Aug 2026 (the filing on sec.gov)
Wellington Management Group LLP141,816$10munder 0.1%Trimmed-1,651,70114 Aug 2026 (the filing on sec.gov)
Marshall Wace LLP111,574$8.1munder 0.1%Newnew13 Aug 2026 (the filing on sec.gov)
Tudor Investment Corp110,710$8.1munder 0.1%Newnew14 Aug 2026 (the filing on sec.gov)
AllianceBernstein LP65,993$7.7munder 0.1%Trimmed-1,32214 Aug 2026 (the filing on sec.gov)
Point72 Asset Management LP89,731$6.5munder 0.1%Newnew14 Aug 2026 (the filing on sec.gov)
Walleye Capital LLC82,847$6.0munder 0.1%Added+23,0333 Aug 2026 (the filing on sec.gov)
Squarepoint Ops LLC79,967$5.8munder 0.1%Added+41,43514 Aug 2026 (the filing on sec.gov)
PDT Partners LLC75,777$5.5m0.29%Held014 Aug 2026 (the filing on sec.gov)
Two Sigma Investments LP45,357$3.3munder 0.1%Newnew14 Aug 2026 (the filing on sec.gov)
Acadian Asset Management LLC34,498$2.5munder 0.1%Newnew13 Aug 2026 (the filing on sec.gov)
Freestone Grove Partners LP27,248$2.0munder 0.1%Newnew14 Aug 2026 (the filing on sec.gov)
Susquehanna International Group LLP26,155$1.9munder 0.1%Added+11,15614 Aug 2026 (the filing on sec.gov)
Man Group PLC25,705$1.9munder 0.1%Trimmed-134,58114 Aug 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q1 2026 to Q2 2026, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (9)

Exited (3)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
8 in Q3 2024 to 7 in Q2 2026

Tracked managers listing it, at least.

0510152014201620182020202220242026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
WLK by quarter
QuarterHoldersReported valueBuyersSellers
Q2 20137$113mn.a.n.a.
Q3 20139$189mn.a.n.a.
Q4 201310$271mn.a.n.a.
Q1 201410$267mn.a.n.a.
Q2 20148$254mn.a.n.a.
Q3 201410$614mn.a.n.a.
Q4 20149$288mn.a.n.a.
Q1 201512$503mn.a.n.a.
Q2 201510$513mn.a.n.a.
Q3 20159$402mn.a.n.a.
Q4 20156$274mn.a.n.a.
Q1 20165$192mn.a.n.a.
Q2 20166$223mn.a.n.a.
Q3 201610$340mn.a.n.a.
Q4 201612$357mn.a.n.a.
Q1 20179$456mn.a.n.a.
Q2 20176$502mn.a.n.a.
Q3 201712$612mn.a.n.a.
Q4 20177$914mn.a.n.a.
Q1 201811$912mn.a.n.a.
Q2 20189$1.1bnn.a.n.a.
Q3 20189$937mn.a.n.a.
Q4 20188$763mn.a.n.a.
Q1 201910$881mn.a.n.a.
Q2 20198$839mn.a.n.a.
Q3 20198$911mn.a.n.a.
Q4 20197$682mn.a.n.a.
Q1 20207$305mn.a.n.a.
Q2 20208$611mn.a.n.a.
Q3 20205$794mn.a.n.a.
Q4 20208$996mn.a.n.a.
Q1 202110$794mn.a.n.a.
Q2 20217$325mn.a.n.a.
Q3 202112$344mn.a.n.a.
Q4 202111$315mn.a.n.a.
Q1 20228$416mn.a.n.a.
Q2 202210$373mn.a.n.a.
Q3 202211$401mn.a.n.a.
Q4 20228$681mn.a.n.a.
Q1 20238$935mn.a.n.a.
Q2 20237$709mn.a.n.a.
Q3 20238$858mn.a.n.a.
Q4 20239$963m44
Q1 20248$965m72
Q2 20247$832m43
Q3 20248$306m72
Q4 202410$430m81
Q1 202511$442m101
Q2 20257$252m53
Q3 20257$165m53
Q4 20259$654m1818
Q1 202610$1.2bn1518
Q2 20267$318m2014

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

WLK and LIN →WLK and GLW →WLK and HWM →Choose a stock to compare with WLK →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own WLK, latest filings →Back to the 13F Explorer →