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Westlake Corp. 13F holders

Of the 44 funds followed here, 7 reported a position in Westlake Corp. in a 13F for the quarter ended 30 June 2026. The largest: Citadel Advisors, 1.2 million shares worth $84.1 million, 0.0% of its reported book. New this quarter: Point72 Asset Management, Two Sigma Investments. Sold out: Duquesne Family Office.

FundSharesValueOf its bookChange on the quarterStatusQuarter endedFiling
Citadel Advisors1,151,468$84.1 million0.0%+304,282added30 June 202613F
Geode Capital Management718,597$52.5 million0.0%+104,263added30 June 202613F
Millennium Management366,074$26.7 million0.0%+281,077added30 June 202613F
FMR LLC361,243$26.4 million0.0%-951,230trimmed30 June 202613F
Norges Bank214,101$15.6 million0.0%held30 June 202613F
Point72 Asset Management89,731$6.6 million0.0%+89,731new30 June 202613F
Two Sigma Investments45,357$3.3 million0.0%+45,357new30 June 202613F
Duquesne Family Office0$00.0%-21,194exited30 June 202613F
Value is what the fund reported.
Read moreChange is shares against the fund's previous 13F; a fund with one filing read shows no change. 13Fs cover long US positions of managers above $100 million and are filed up to 45 days after the quarter.

Schedule 13D and 13G filed on the name, last twelve months

None in the last twelve months: no holder crossed 5%, changed materially, or filed an annual 13G in the window.

Fails to deliver

Settlement dateShares failedPriceFile
26 August 2026100$74.80SEC
25 August 202657,174$76.49SEC
14 August 20263,087$80.19SEC
13 August 20263,302$79.17SEC
12 August 2026707$80.84SEC
10 August 202616,067$77.47SEC
Shares that failed to deliver at settlement, per day, from the SEC's half-month files, which arrive about two weeks after the period.
Read moreLargest in the window: 57,174 on 25 August 2026. A fail is an operational fact about settlement, not a position.

Source

Each fund's 13F-HR on EDGAR, linked per row; positions matched to WLK by CUSIP from the SEC's own fails-to-deliver files; Schedule 13D and 13G from the company's own filing index, each read to confirm the company is the issuer named.

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