WELLINGTON MANAGEMENT GROUP LLP

Position in WLK — Westlake Corp

CIK 902219 Boston, MA

Position in WLK

as of Mar 31, 2026 · filed May 15, 2026 Compact

Position Value

$209,518,654

-$102,561,159 QoQ

Shares Held

1,793,517

-57.5% QoQ

Ownership

1.40%

of shares outstanding

% of Portfolio

0.04%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

24 quarters on record

Voting authority Sole 0.ToString("F0")% Shared 98.42610914755755.ToString("F0")% None 1.5738908524424358.ToString("F0")%

Basic Materials · as of Mar 31, 2026

WELLINGTON MANAGEMENT GROUP LLP holds $5,098,258,636 across 21 Specialty Chemicals names. WLK ranks #5 (4.1% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	LIN	Linde PLC	5,152,523	$2,554,414,799
2	PPG	Ppg Industries Inc	10,372,845	$1,108,649,668
3	SHW	Sherwin Williams Co	1,191,670	$381,989,816
4	CBT	Cabot Corp	3,566,172	$268,568,409
5	WLK	Westlake Corp This page	1,793,517	$209,518,654
6	AVNT	Avient Corp	2,933,909	$106,500,895
7	NGVT	Ingevity Corp	1,494,292	$106,438,417
8	KWR	Quaker Chemical Corp	748,141	$92,941,554

24 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$209,518,654	1,793,517	-57.5%	Shares	Defined	2026-05-15
2025-12-31	$312,079,813	4,220,717	+7239.1%	Shares	Defined	2026-02-17
2025-09-30	$4,431,719	57,510	+1130.4%	Shares	Defined	2025-11-14
2025-03-31	$467,539	4,674	-89.1%	Shares	Defined	2025-05-13
2024-12-31	$4,922,382	42,934	+5.6%	Shares	Defined	2025-02-12
2024-09-30	$6,109,739	40,653	-16.2%	Shares	Defined	2024-11-14
2024-06-30	$7,027,245	48,524	+1.1%	Shares	Defined	2024-08-14
2024-03-31	$7,331,190	47,979	+4.1%	Shares	Defined	2024-05-15
2023-12-31	$6,448,516	46,074	-8.2%	Shares	Defined	2024-02-12
2023-09-30	$6,257,685	50,194	+37.1%	Shares	Defined	2023-11-14
2023-06-30	$4,373,915	36,611	+27.3%	Shares	Defined	2023-08-14
2023-03-31	$3,335,120	28,756	-38.0%	Shares	Defined	2023-05-12
2022-12-31	$4,752,420	46,347	-3.4%	Shares	Defined	2023-02-13
2022-09-30	$4,169,631	47,993	-70.0%	Shares	Defined	2022-11-14
2022-06-30	$15,667,711	159,842	-12.3%	Shares	Defined	2022-08-15
2022-03-31	$22,489,032	182,245	-2.1%	Shares	Defined	2022-05-16
2021-12-31	$18,074,046	186,081	+466.8%	Shares	Defined	2022-02-11
2021-09-30	$2,992,217	32,831	+8.2%	Shares	Defined	2021-11-15
2021-06-30	$2,732,789	30,334	-3.3%	Shares	Defined	2021-08-16
2021-03-31	$2,783,921	31,354	+23.2%	Shares	Defined	2021-05-17
2020-12-31	$2,077,209	25,456	-21.3%	Shares	Defined	2021-02-12
2020-09-30	$2,045,166	32,350	-1.5%	Shares	Defined	2020-11-16
2020-06-30	$1,762,724	32,856	-18.9%	Shares	Defined	2020-08-14
2020-03-31	$1,546,380	40,513	—	Shares	Defined	2020-05-14
No filing history on record for this holder in this stock.