Westlake (WLK) insider trading activity: Get Latest News Today

WLK Stock Outstanding Shares

Making an investment decision in the stock market involves a certain amount of risk, so it's important to thoroughly review a company's stock before making any decisions. Stock float, number of short positions and outstanding shares are among the many factors an investor should take into account.

ShortableYes

OptionableYes

Short Percent Of Outstanding Shares1.57

Short Percent Of Float6.03

Shares Outstanding128.49M

Shares Float33.75M

Shares Short2.01M

Short Ratio2.69

6.03%

Short % of Float

1.57%

Short % of Shares Outstanding

Market Insider WLK

Investors cannot turn a blind eye to insiders as well as institutional ownership. They need to follow insider trades to determine the direction the stock is likely to take.

Major Holders Summary

74.08% Percentage of Shares held by All Insiders

27.88% Percentage of Shares held by All Institutions

107.58% Percentage of Float held by Institutions

528

Number of Institutions Holding Shares

Institutional Ownership

About 27.88% of WLK shares are held by financial institutions. STATE OF WISCONSIN INVESTMENT BOARD is the top corporate investor, holding 74.94K shares valued at $11.45M. A 0.06% stake in Westlake Corporation is owned by the company. ALLIANCEBERNSTEIN L.P. owns 72.65K shares valued at $11.10M, which translates its holding of 0.06% of the stake in the company.

Date	Holder	% Stake	Shares Held	Total Value ($)	Shares	% Change in Portfolio
Mar 31, 2024	STATE OF WISCONSIN INVESTMENT BOARD	0.06%	74.94K	11.45M	650	+0.87%
Mar 31, 2024	ALLIANCEBERNSTEIN L.P.	0.06%	72.65K	11.1M	-202	-0.28%
Mar 31, 2024	WEDGE CAPITAL MANAGEMENT L L P/NC	0.06%	71.32K	10.9M	6.51K	+10.05%
Mar 31, 2024	WELLS FARGO & COMPANY/MN	0.06%	71.21K	10.88M	-6.81K	-8.73%
Mar 31, 2024	SPROTT INC.	0.05%	70K	10.7M	-20K	-22.22%
Mar 31, 2024	LAZARD ASSET MANAGEMENT LLC	0.05%	67.88K	10.37M	64.96K	+2,218.44%
Mar 31, 2024	CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM	0.05%	64.41K	9.84M	-2.19K	-3.29%
Mar 31, 2024	CONTRAVISORY INVESTMENT MANAGEMENT, INC.	0.05%	63.21K	9.66M	-764	-1.19%
Mar 31, 2024	QUANTINNO CAPITAL MANAGEMENT LP	0.05%	58.66K	8.96M	17.73K	+43.31%
Mar 31, 2024	JANNEY MONTGOMERY SCOTT LLC	0.04%	56.34K	8.61M	2.84K	+5.31%
Mar 31, 2024	CREDIT SUISSE AG/	0.04%	46.04K	7.03M	4.43K	+10.65%
Mar 31, 2024	BNP PARIBAS ARBITRAGE, SNC	0.03%	42.59K	6.51M	1.15K	+2.79%
Mar 31, 2024	AMERICAN INTERNATIONAL GROUP, INC.	0.03%	42.41K	6.48M	-867	-2.00%
Mar 31, 2024	KNIGHTS OF COLUMBUS ASSET ADVISORS LLC	0.03%	40.88K	6.25M	492	+1.22%
Mar 31, 2024	RETIREMENT SYSTEMS OF ALABAMA	0.03%	40.23K	6.15M	105	+0.26%
Mar 31, 2024	AMERICAN CENTURY COMPANIES INC	0.03%	39.34K	6.01M	-20.86K	-34.65%
Mar 31, 2024	ENSIGN PEAK ADVISORS, INC	0.03%	37.69K	5.76M	-4.44K	-10.54%
Mar 31, 2024	ORBIS ALLAN GRAY LTD	2.11%	2.71M	414.77M	-112.8K	-3.99%
Mar 31, 2024	GOLDMAN SACHS GROUP INC	0.52%	662.68K	101.26M	-26.73K	-3.88%
Mar 31, 2024	NUVEEN ASSET MANAGEMENT, LLC	0.48%	618.11K	94.45M	87.71K	+16.54%
Mar 31, 2024	MIRAE ASSET GLOBAL INVESTMENTS CO., LTD.	0.44%	566.55K	64.25M	-105.55K	-15.70%
Mar 31, 2024	CITADEL ADVISORS LLC	0.44%	562.17K	85.9M	-18.31K	-3.15%
Mar 31, 2024	NATIXIS	0.07%	85K	12.99M	84.8K	+41,979.21%
Mar 31, 2024	FMR LLC	3.41%	4.36M	665.55M	53.39K	+1.24%
Mar 31, 2024	BLACKROCK INC.	2.72%	3.48M	531.72M	-65.34K	-1.84%
Mar 31, 2024	VANGUARD GROUP INC	2.63%	3.36M	513.71M	-25.45K	-0.75%
Mar 31, 2024	VICTORY CAPITAL MANAGEMENT INC	2.51%	3.21M	490.37M	-56.22K	-1.72%
Mar 31, 2024	PACER ADVISORS, INC.	1.06%	1.36M	208.23M	220.19K	+19.27%
Mar 31, 2024	CAPITAL WORLD INVESTORS	1.04%	1.33M	203.92M	22.74K	+1.73%
Mar 31, 2024	STATE STREET CORP	0.93%	1.19M	181.38M	-10.08K	-0.84%
Mar 31, 2024	DIMENSIONAL FUND ADVISORS LP	0.76%	969.42K	148.13M	-56.64K	-5.52%
Mar 31, 2024	GEODE CAPITAL MANAGEMENT, LLC	0.4%	507.36K	77.37M	21.82K	+4.49%
Mar 31, 2024	FIRST TRUST ADVISORS LP	0.38%	490.81K	75M	79K	+19.18%
Mar 31, 2024	BANK OF NEW YORK MELLON CORP	0.27%	340.5K	52.03M	-8.68K	-2.49%
Mar 31, 2024	MORGAN STANLEY	0.25%	317.99K	48.59M	62.09K	+24.27%
Mar 31, 2024	SUSQUEHANNA INTERNATIONAL GROUP, LLP	0.25%	313.1K	47.84M	302.9K	+2,969.61%
Mar 31, 2024	INVESCO LTD.	0.24%	309.97K	47.36M	-118.04K	-27.58%
Mar 31, 2024	NORTHERN TRUST CORP	0.19%	246.47K	37.66M	-55.81K	-18.46%
Mar 31, 2024	LEGAL & GENERAL GROUP PLC	0.19%	246.13K	37.61M	-5.02K	-2.00%
Mar 31, 2024	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	0.18%	232.89K	35.59M	-120.03K	-34.01%
Mar 31, 2024	PROSHARE ADVISORS LLC	0.17%	220.29K	33.66M	-38.93K	-15.02%
Mar 31, 2024	ALLSPRING GLOBAL INVESTMENTS HOLDINGS, LLC	0.17%	213.65K	32.65M	-21.23K	-9.04%
Mar 31, 2024	UBS ASSET MANAGEMENT AMERICAS INC	0.16%	205.85K	31.45M	-4.25K	-2.02%
Mar 31, 2024	BALYASNY ASSET MANAGEMENT L.P.	0.16%	201.29K	30.76M	201.29K	+100.00%
Mar 31, 2024	EXODUSPOINT CAPITAL MANAGEMENT, LP	0.15%	191.55K	29.27M	112.06K	+140.97%
Mar 31, 2024	MEREWETHER INVESTMENT MANAGEMENT, LP	0.15%	190.27K	29.07M	190.27K	+100.00%
Mar 31, 2024	BANK OF AMERICA CORP /DE/	0.15%	189.42K	28.94M	118.93K	+168.71%
Mar 31, 2024	ROBOTTI ROBERT	0.13%	167.67K	25.62M	-58.9K	-26.00%
Mar 31, 2024	APPIAN WAY ASSET MANAGEMENT LP	0.13%	164.62K	25.15M	164.62K	+100.00%
Mar 31, 2024	AQR CAPITAL MANAGEMENT LLC	0.11%	143.73K	21.91M	-51.74K	-26.47%
Mar 31, 2024	CERITY PARTNERS LLC	0.11%	144.11K	22.02M	83.43K	+137.50%
Mar 31, 2024	SCOPUS ASSET MANAGEMENT, L.P.	0.11%	136.76K	20.9M	136.76K	+100.00%
Mar 31, 2024	JPMORGAN CHASE & CO	0.1%	131.46K	20.09M	38.18K	+40.92%
Mar 31, 2024	PRINCIPAL FINANCIAL GROUP INC	0.09%	120.66K	18.44M	3.04K	+2.59%
Mar 31, 2024	SWISS NATIONAL BANK	0.09%	115.1K	17.59M	-4.3K	-3.60%
Mar 31, 2024	AMERIPRISE FINANCIAL INC	0.09%	109.82K	16.78M	-8.56K	-7.23%
Mar 31, 2024	JANUS HENDERSON GROUP PLC	0.09%	109.2K	16.69M	-63.24K	-36.67%
Mar 31, 2024	ALYESKA INVESTMENT GROUP, L.P.	0.08%	106.75K	16.31M	61.39K	+135.32%
Mar 31, 2024	GRANTHAM, MAYO, VAN OTTERLOO & CO. LLC	0.08%	103.21K	15.77M	-29.23K	-22.07%
Mar 31, 2024	SCOUT INVESTMENTS, INC.	0.08%	97.61K	15.06M	-8.73K	-8.21%
Mar 31, 2024	GUGGENHEIM CAPITAL LLC	0.08%	97.07K	14.83M	13.53K	+16.19%
Mar 31, 2024	MILLENNIUM MANAGEMENT LLC	0.08%	96.29K	14.71M	71.41K	+287.08%
Mar 31, 2024	FEDERATED HERMES, INC.	0.08%	96.05K	14.68M	-96.06K	-50.00%
Mar 31, 2024	RHUMBLINE ADVISERS	0.07%	94.47K	14.44M	-1.3K	-1.36%
Mar 31, 2024	VIDENT ADVISORY, LLC	0.07%	94.66K	14.46M	8.94K	+10.43%
Mar 31, 2024	SUMITOMO MITSUI TRUST HOLDINGS, INC.	0.07%	87.04K	13.3M	-2.27K	-2.54%
Dec 31, 2023	WELLS FARGO & COMPANY/MN	0.06%	78.02K	10.92M	-6.51K	-7.70%
Dec 31, 2023	FMR LLC	3.37%	4.3M	602.15M	-328.67K	-7.10%
Dec 31, 2023	BLACKROCK INC.	2.77%	3.55M	496.18M	25.53K	+0.73%
Dec 31, 2023	VANGUARD GROUP INC	2.65%	3.39M	474.1M	4.53K	+0.13%
Dec 31, 2023	VICTORY CAPITAL MANAGEMENT INC	2.55%	3.27M	457.03M	-103.82K	-3.08%
Dec 31, 2023	ORBIS ALLAN GRAY LTD	2.21%	2.83M	395.7M	-384.28K	-11.97%
Dec 31, 2023	CAPITAL WORLD INVESTORS	1.03%	1.31M	183.6M	675.73K	+106.23%
Dec 31, 2023	STATE STREET CORP	0.94%	1.2M	167.55M	68.7K	+6.09%
Dec 31, 2023	PACER ADVISORS, INC.	0.89%	1.14M	159.92M	66.61K	+6.19%
Dec 31, 2023	DIMENSIONAL FUND ADVISORS LP	0.8%	1.03M	143.61M	-76.48K	-6.94%
Dec 31, 2023	SOROBAN CAPITAL PARTNERS LP	0.68%	871.48K	121.97M	-27.36K	-3.04%
Dec 31, 2023	GOLDMAN SACHS GROUP INC	0.54%	689.4K	96.49M	-16.09K	-2.28%
Dec 31, 2023	MIRAE ASSET GLOBAL INVESTMENTS CO., LTD.	0.53%	672.1K	94.07M	-10.73K	-1.57%
Dec 31, 2023	CITADEL ADVISORS LLC	0.45%	580.48K	81.24M	-190.18K	-24.68%
Dec 31, 2023	NUVEEN ASSET MANAGEMENT, LLC	0.41%	530.41K	74.24M	11.74K	+2.26%
Dec 31, 2023	GEODE CAPITAL MANAGEMENT, LLC	0.38%	485.54K	67.83M	11.4K	+2.41%
Dec 31, 2023	INVESCO LTD.	0.33%	428.01K	59.9M	123.58K	+40.59%
Dec 31, 2023	FIRST TRUST ADVISORS LP	0.32%	411.82K	57.64M	-61.83K	-13.05%
Dec 31, 2023	SAMLYN CAPITAL, LLC	0.31%	393.29K	55.05M	76.56K	+24.17%
Dec 31, 2023	NORGES BANK	0.28%	364.11K	50.96M	364.11K	+100.00%
Dec 31, 2023	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	0.28%	352.92K	49.4M	8.29K	+2.41%
Dec 31, 2023	BANK OF NEW YORK MELLON CORP	0.27%	349.18K	48.87M	-26.14K	-6.97%
Dec 31, 2023	NORTHERN TRUST CORP	0.24%	302.29K	42.31M	-19.6K	-6.09%
Dec 31, 2023	PROSHARE ADVISORS LLC	0.2%	259.22K	36.28M	-17K	-6.15%
Dec 31, 2023	MORGAN STANLEY	0.2%	255.9K	35.82M	-74.13K	-22.46%
Dec 31, 2023	LEGAL & GENERAL GROUP PLC	0.2%	251.15K	35.15M	46.37K	+22.64%
Dec 31, 2023	ALLSPRING GLOBAL INVESTMENTS HOLDINGS, LLC	0.18%	234.88K	32.87M	-55.44K	-19.10%
Dec 31, 2023	ROBOTTI ROBERT	0.18%	226.57K	31.71M	-1.06K	-0.46%
Dec 31, 2023	UBS ASSET MANAGEMENT AMERICAS INC	0.16%	210.09K	29.4M	2.12K	+1.02%
Dec 31, 2023	AQR CAPITAL MANAGEMENT LLC	0.15%	195.47K	27.36M	-115.15K	-37.07%
Dec 31, 2023	FEDERATED HERMES, INC.	0.15%	192.11K	26.89M	-216.19K	-52.95%
Dec 31, 2023	JANUS HENDERSON GROUP PLC	0.13%	172.44K	24.13M	-33.18K	-16.13%
Dec 31, 2023	GRANTHAM, MAYO, VAN OTTERLOO & CO. LLC	0.1%	132.45K	18.54M	-95.02K	-41.77%
Dec 31, 2023	SWISS NATIONAL BANK	0.09%	119.4K	16.71M	-3.8K	-3.08%
Dec 31, 2023	AMERIPRISE FINANCIAL INC	0.09%	118.38K	16.57M	-6.48K	-5.19%
Dec 31, 2023	PRINCIPAL FINANCIAL GROUP INC	0.09%	117.62K	16.46M	-170	-0.14%
Dec 31, 2023	BANK OF MONTREAL /CAN/	0.09%	111.33K	15.88M	107.86K	+3,101.98%
Dec 31, 2023	SCOUT INVESTMENTS, INC.	0.08%	106.34K	14.88M	-17.67K	-14.25%
Dec 31, 2023	TUDOR INVESTMENT CORP ET AL	0.08%	99.75K	13.96M	24.58K	+32.70%
Dec 31, 2023	RHUMBLINE ADVISERS	0.07%	95.77K	13.4M	-1.74K	-1.78%
Dec 31, 2023	JPMORGAN CHASE & CO	0.07%	93.29K	13.06M	1.64K	+1.79%
Dec 31, 2023	SPROTT INC.	0.07%	90K	12.6M	-5K	-5.26%
Dec 31, 2023	SUMITOMO MITSUI TRUST HOLDINGS, INC.	0.07%	89.31K	12.5M	445	+0.50%
Dec 31, 2023	VIDENT ADVISORY, LLC	0.07%	85.72K	12M	293	+0.34%
Dec 31, 2023	WORLDQUANT MILLENNIUM ADVISORS LLC	0.07%	85.4K	11.95M	-34.27K	-28.64%
Dec 31, 2023	KBC GROUP NV	0.07%	85.01K	11.9M	-10.34K	-10.84%
Dec 31, 2023	TWO SIGMA INVESTMENTS, LP	0.07%	84.97K	11.89M	-14.65K	-14.71%
Dec 31, 2023	GUGGENHEIM CAPITAL LLC	0.07%	83.54K	11.69M	-4.35K	-4.95%
Dec 31, 2023	CAISSE DE DEPOT ET PLACEMENT DU QUEBEC	0.06%	82.15K	11.5M	-65.01K	-44.18%
Dec 31, 2023	EXODUSPOINT CAPITAL MANAGEMENT, LP	0.06%	79.49K	11.13M	-41.04K	-34.05%

WLK Insiders

Among the WLK insiders holding of 74.08% of the stake in company, TTWFGP LLC, 10 percent owner, holds the largest shares of 47.26M. CHAO ALBERT, President & CEO, is the second largest WLK insider with ownership of 472.98K shares. BENDER MARK STEVEN, EVP & CFO, stands third with possession of 40.36K shares of that stake.

Insiders	Designation	Shares Held
TTWFGP LLC	10 percent owner	47.26M
CHAO ALBERT	President & CEO	472.98K
BENDER MARK STEVEN	EVP & CFO	40.36K
EDERINGTON L. BENJAMIN	EVP, GC, CAO and Secretary	37.42K
KEARNS ROGER L.	COO and EVP - PEM	26.39K
BUESINGER ROBERT F.	EVP, HIP, IT & Digital	17.64K
KENNER ANDREW	SVP - Chemical Manufacturing	11.44K
CHAO DAVID TSUNG-HUNG	director	7.78K
TEEL LAWRENCE E.	EVP and Special Advisor to CEO	4.9K
ZOELLER JOHNATHAN STEVAN	VP & Chief Accounting Officer	543

Buying/Selling by Insiders

Date	Insider	Type	Cost	Shares	Value ($)	Shares Total
Nov 29, 2024	CHAO DAVID TSUNG-HUNG	SALE	129.08	1.75K	225.89K	7.78K
Nov 22, 2024	CHAO DAVID TSUNG-HUNG	SALE	130.00	1.75K	227.5K	9.53K
May 09, 2024	BUESINGER ROBERT F.	SALE	158.50	3.5K	554.75K	17.64K
May 03, 2024	BENDER MARK STEVEN	SALE	152.19	4.95K	753.34K	40.36K
Mar 15, 2024	BUESINGER ROBERT F.	SALE	144.50	3.88K	560.37K	21.14K
Mar 13, 2024	BUESINGER ROBERT F.	SALE	144.50	122	17.63K	25.02K
Mar 06, 2024	BENDER MARK STEVEN	SALE	141.02	4.8K	677.46K	45.31K
Feb 26, 2024	BENDER MARK STEVEN	SALE	137.57	4.85K	667.76K	50.11K
Nov 15, 2023	BUESINGER ROBERT F.	SALE	130.50	4.22K	550.06K	16.75K
Aug 23, 2023	CHAO DAVID TSUNG-HUNG	SALE	131.00	1K	131K	10.15K
Aug 31, 2022	BUESINGER ROBERT F.	SALE	98.94	1K	98.94K	10.21K
Aug 26, 2022	ZOELLER JOHNATHAN STEVAN	SALE	107.08	542	58.04K	543
May 27, 2022	BUESINGER ROBERT F.	SALE	129.47	14.43K	1.87M	11.78K
May 19, 2022	CHAO ALBERT	SALE	129.38	5.05K	652.71K	472.98K
May 17, 2022	KEARNS ROGER L.	SALE	136.24	8.39K	1.14M	26.39K
May 05, 2022	EDERINGTON L. BENJAMIN	SALE	139.26	3.14K	437.69K	37.42K
Mar 31, 2022	BENDER MARK STEVEN	SALE	124.99	100	12.5K	30.73K
Mar 30, 2022	BENDER MARK STEVEN	SALE	125.10	3.06K	383.04K	30.73K
Mar 29, 2022	BENDER MARK STEVEN	SALE	122.44	4K	489.75K	30.73K
Mar 25, 2022	KEARNS ROGER L.	SALE	126.40	2.86K	361.64K	26.39K
Mar 25, 2022	BENDER MARK STEVEN	SALE	125.74	2.95K	370.56K	30.73K
Mar 24, 2022	BENDER MARK STEVEN	SALE	125.38	8K	1M	30.73K
Mar 23, 2022	BENDER MARK STEVEN	SALE	125.69	344	43.24K	30.73K
Mar 10, 2022	BUESINGER ROBERT F.	SALE	117.61	22.56K	2.65M	14.84K
Mar 09, 2022	BUESINGER ROBERT F.	SALE	115.55	2.73K	315.45K	14.84K
Mar 01, 2022	ZOELLER JOHNATHAN STEVAN	SALE	110.39	1.01K	111.05K	1.16K
Dec 02, 2021	CHAO ALBERT	SALE	92.29	20.33K	1.88M	441.94K
Dec 01, 2021	CHAO ALBERT	SALE	94.80	3.79K	359.2K	441.94K
Nov 11, 2021	BENDER MARK STEVEN	SALE	101.57	2.37K	240.62K	22.02K
Nov 08, 2021	BENDER MARK STEVEN	SALE	100.77	631	63.59K	24.39K
Nov 05, 2021	BENDER MARK STEVEN	SALE	98.80	6.36K	627.95K	25.02K
Aug 11, 2021	CHAO ALBERT	PURCHASE	86.21	3K	258.63K	441.94K
May 10, 2021	BUESINGER ROBERT F.	SALE	105.00	5K	525K	8.22K
Mar 12, 2021	BENDER MARK STEVEN	SALE	95.23	5.82K	554.24K	31.38K
Mar 09, 2021	BENDER MARK STEVEN	SALE	92.27	25.81K	2.38M	31.38K
Mar 08, 2021	BUESINGER ROBERT F.	SALE	95.00	7.86K	746.8K	13.3K
Feb 25, 2021	TEEL LAWRENCE E.	SALE	87.14	4.9K	427.16K	4.9K
Feb 25, 2021	ZOELLER JOHNATHAN STEVAN	SALE	86.94	1.01K	87.46K	0
Nov 24, 2020	BUESINGER ROBERT F.	SALE	77.50	4.58K	355.03K	10.57K
Nov 23, 2020	KENNER ANDREW	SALE	74.75	5.92K	442.82K	11.44K
Nov 06, 2020	CHAO ALBERT	SALE	75.12	4.2K	315.35K	427.66K
Nov 06, 2020	BENDER MARK STEVEN	SALE	74.79	1.6K	119.67K	27.88K
Nov 05, 2020	BENDER MARK STEVEN	SALE	74.54	420	31.31K	29.48K
Mar 27, 2020	TTWFGP LLC	PURCHASE	37.58	16.98K	637.92K	47.26M
Mar 26, 2020	TTWFGP LLC	PURCHASE	40.47	42.2K	1.71M	47.14M
Mar 25, 2020	TTWFGP LLC	PURCHASE	37.98	6.65K	252.6K	46.97M
Mar 24, 2020	TTWFGP LLC	PURCHASE	34.94	4.74K	165.55K	46.83M
Mar 19, 2020	TTWFGP LLC	PURCHASE	35.23	3K	105.76K	46.66M
Mar 18, 2020	TTWFGP LLC	PURCHASE	30.58	25.97K	794.16K	46.52M
Mar 17, 2020	TTWFGP LLC	PURCHASE	35.06	100	3.51K	46.49M
Mar 16, 2020	TTWFGP LLC	PURCHASE	31.42	160K	5.03M	320K
Mar 13, 2020	TTWFGP LLC	PURCHASE	32.94	160K	5.27M	160K

Insider Transaction Summary (6 Months)

SHARESTRANS

PURCHASE00

SALES3.5K2

NET SHARES-3.5K2

SHARES HELD17.32K2

% NET SHARES-120.21%0%

Frequently Asked Questions

WLK Stock Outstanding Shares

ShortableYes

OptionableYes

Short Percent Of Outstanding Shares1.57

Short Percent Of Float6.03

Shares Outstanding128.49M

Shares Float33.75M

Shares Short2.01M

Short Ratio2.69

6.03%

Short % of Float

1.57%

Short % of Shares Outstanding

Market Insider WLK

Investors cannot turn a blind eye to insiders as well as institutional ownership. They need to follow insider trades to determine the direction the stock is likely to take.

Major Holders Summary

74.08% Percentage of Shares held by All Insiders

27.88% Percentage of Shares held by All Institutions

107.58% Percentage of Float held by Institutions

528

Number of Institutions Holding Shares

Institutional Ownership

Date	Holder	% Stake	Shares Held	Total Value ($)	Shares	% Change in Portfolio
Mar 31, 2024	STATE OF WISCONSIN INVESTMENT BOARD	0.06%	74.94K	11.45M	650	+0.87%
Mar 31, 2024	ALLIANCEBERNSTEIN L.P.	0.06%	72.65K	11.1M	-202	-0.28%
Mar 31, 2024	WEDGE CAPITAL MANAGEMENT L L P/NC	0.06%	71.32K	10.9M	6.51K	+10.05%
Mar 31, 2024	WELLS FARGO & COMPANY/MN	0.06%	71.21K	10.88M	-6.81K	-8.73%
Mar 31, 2024	SPROTT INC.	0.05%	70K	10.7M	-20K	-22.22%
Mar 31, 2024	LAZARD ASSET MANAGEMENT LLC	0.05%	67.88K	10.37M	64.96K	+2,218.44%
Mar 31, 2024	CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM	0.05%	64.41K	9.84M	-2.19K	-3.29%
Mar 31, 2024	CONTRAVISORY INVESTMENT MANAGEMENT, INC.	0.05%	63.21K	9.66M	-764	-1.19%
Mar 31, 2024	QUANTINNO CAPITAL MANAGEMENT LP	0.05%	58.66K	8.96M	17.73K	+43.31%
Mar 31, 2024	JANNEY MONTGOMERY SCOTT LLC	0.04%	56.34K	8.61M	2.84K	+5.31%
Mar 31, 2024	CREDIT SUISSE AG/	0.04%	46.04K	7.03M	4.43K	+10.65%
Mar 31, 2024	BNP PARIBAS ARBITRAGE, SNC	0.03%	42.59K	6.51M	1.15K	+2.79%
Mar 31, 2024	AMERICAN INTERNATIONAL GROUP, INC.	0.03%	42.41K	6.48M	-867	-2.00%
Mar 31, 2024	KNIGHTS OF COLUMBUS ASSET ADVISORS LLC	0.03%	40.88K	6.25M	492	+1.22%
Mar 31, 2024	RETIREMENT SYSTEMS OF ALABAMA	0.03%	40.23K	6.15M	105	+0.26%
Mar 31, 2024	AMERICAN CENTURY COMPANIES INC	0.03%	39.34K	6.01M	-20.86K	-34.65%
Mar 31, 2024	ENSIGN PEAK ADVISORS, INC	0.03%	37.69K	5.76M	-4.44K	-10.54%
Mar 31, 2024	ORBIS ALLAN GRAY LTD	2.11%	2.71M	414.77M	-112.8K	-3.99%
Mar 31, 2024	GOLDMAN SACHS GROUP INC	0.52%	662.68K	101.26M	-26.73K	-3.88%
Mar 31, 2024	NUVEEN ASSET MANAGEMENT, LLC	0.48%	618.11K	94.45M	87.71K	+16.54%
Mar 31, 2024	MIRAE ASSET GLOBAL INVESTMENTS CO., LTD.	0.44%	566.55K	64.25M	-105.55K	-15.70%
Mar 31, 2024	CITADEL ADVISORS LLC	0.44%	562.17K	85.9M	-18.31K	-3.15%
Mar 31, 2024	NATIXIS	0.07%	85K	12.99M	84.8K	+41,979.21%
Mar 31, 2024	FMR LLC	3.41%	4.36M	665.55M	53.39K	+1.24%
Mar 31, 2024	BLACKROCK INC.	2.72%	3.48M	531.72M	-65.34K	-1.84%
Mar 31, 2024	VANGUARD GROUP INC	2.63%	3.36M	513.71M	-25.45K	-0.75%
Mar 31, 2024	VICTORY CAPITAL MANAGEMENT INC	2.51%	3.21M	490.37M	-56.22K	-1.72%
Mar 31, 2024	PACER ADVISORS, INC.	1.06%	1.36M	208.23M	220.19K	+19.27%
Mar 31, 2024	CAPITAL WORLD INVESTORS	1.04%	1.33M	203.92M	22.74K	+1.73%
Mar 31, 2024	STATE STREET CORP	0.93%	1.19M	181.38M	-10.08K	-0.84%
Mar 31, 2024	DIMENSIONAL FUND ADVISORS LP	0.76%	969.42K	148.13M	-56.64K	-5.52%
Mar 31, 2024	GEODE CAPITAL MANAGEMENT, LLC	0.4%	507.36K	77.37M	21.82K	+4.49%
Mar 31, 2024	FIRST TRUST ADVISORS LP	0.38%	490.81K	75M	79K	+19.18%
Mar 31, 2024	BANK OF NEW YORK MELLON CORP	0.27%	340.5K	52.03M	-8.68K	-2.49%
Mar 31, 2024	MORGAN STANLEY	0.25%	317.99K	48.59M	62.09K	+24.27%
Mar 31, 2024	SUSQUEHANNA INTERNATIONAL GROUP, LLP	0.25%	313.1K	47.84M	302.9K	+2,969.61%
Mar 31, 2024	INVESCO LTD.	0.24%	309.97K	47.36M	-118.04K	-27.58%
Mar 31, 2024	NORTHERN TRUST CORP	0.19%	246.47K	37.66M	-55.81K	-18.46%
Mar 31, 2024	LEGAL & GENERAL GROUP PLC	0.19%	246.13K	37.61M	-5.02K	-2.00%
Mar 31, 2024	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	0.18%	232.89K	35.59M	-120.03K	-34.01%
Mar 31, 2024	PROSHARE ADVISORS LLC	0.17%	220.29K	33.66M	-38.93K	-15.02%
Mar 31, 2024	ALLSPRING GLOBAL INVESTMENTS HOLDINGS, LLC	0.17%	213.65K	32.65M	-21.23K	-9.04%
Mar 31, 2024	UBS ASSET MANAGEMENT AMERICAS INC	0.16%	205.85K	31.45M	-4.25K	-2.02%
Mar 31, 2024	BALYASNY ASSET MANAGEMENT L.P.	0.16%	201.29K	30.76M	201.29K	+100.00%
Mar 31, 2024	EXODUSPOINT CAPITAL MANAGEMENT, LP	0.15%	191.55K	29.27M	112.06K	+140.97%
Mar 31, 2024	MEREWETHER INVESTMENT MANAGEMENT, LP	0.15%	190.27K	29.07M	190.27K	+100.00%
Mar 31, 2024	BANK OF AMERICA CORP /DE/	0.15%	189.42K	28.94M	118.93K	+168.71%
Mar 31, 2024	ROBOTTI ROBERT	0.13%	167.67K	25.62M	-58.9K	-26.00%
Mar 31, 2024	APPIAN WAY ASSET MANAGEMENT LP	0.13%	164.62K	25.15M	164.62K	+100.00%
Mar 31, 2024	AQR CAPITAL MANAGEMENT LLC	0.11%	143.73K	21.91M	-51.74K	-26.47%
Mar 31, 2024	CERITY PARTNERS LLC	0.11%	144.11K	22.02M	83.43K	+137.50%
Mar 31, 2024	SCOPUS ASSET MANAGEMENT, L.P.	0.11%	136.76K	20.9M	136.76K	+100.00%
Mar 31, 2024	JPMORGAN CHASE & CO	0.1%	131.46K	20.09M	38.18K	+40.92%
Mar 31, 2024	PRINCIPAL FINANCIAL GROUP INC	0.09%	120.66K	18.44M	3.04K	+2.59%
Mar 31, 2024	SWISS NATIONAL BANK	0.09%	115.1K	17.59M	-4.3K	-3.60%
Mar 31, 2024	AMERIPRISE FINANCIAL INC	0.09%	109.82K	16.78M	-8.56K	-7.23%
Mar 31, 2024	JANUS HENDERSON GROUP PLC	0.09%	109.2K	16.69M	-63.24K	-36.67%
Mar 31, 2024	ALYESKA INVESTMENT GROUP, L.P.	0.08%	106.75K	16.31M	61.39K	+135.32%
Mar 31, 2024	GRANTHAM, MAYO, VAN OTTERLOO & CO. LLC	0.08%	103.21K	15.77M	-29.23K	-22.07%
Mar 31, 2024	SCOUT INVESTMENTS, INC.	0.08%	97.61K	15.06M	-8.73K	-8.21%
Mar 31, 2024	GUGGENHEIM CAPITAL LLC	0.08%	97.07K	14.83M	13.53K	+16.19%
Mar 31, 2024	MILLENNIUM MANAGEMENT LLC	0.08%	96.29K	14.71M	71.41K	+287.08%
Mar 31, 2024	FEDERATED HERMES, INC.	0.08%	96.05K	14.68M	-96.06K	-50.00%
Mar 31, 2024	RHUMBLINE ADVISERS	0.07%	94.47K	14.44M	-1.3K	-1.36%
Mar 31, 2024	VIDENT ADVISORY, LLC	0.07%	94.66K	14.46M	8.94K	+10.43%
Mar 31, 2024	SUMITOMO MITSUI TRUST HOLDINGS, INC.	0.07%	87.04K	13.3M	-2.27K	-2.54%
Dec 31, 2023	WELLS FARGO & COMPANY/MN	0.06%	78.02K	10.92M	-6.51K	-7.70%
Dec 31, 2023	FMR LLC	3.37%	4.3M	602.15M	-328.67K	-7.10%
Dec 31, 2023	BLACKROCK INC.	2.77%	3.55M	496.18M	25.53K	+0.73%
Dec 31, 2023	VANGUARD GROUP INC	2.65%	3.39M	474.1M	4.53K	+0.13%
Dec 31, 2023	VICTORY CAPITAL MANAGEMENT INC	2.55%	3.27M	457.03M	-103.82K	-3.08%
Dec 31, 2023	ORBIS ALLAN GRAY LTD	2.21%	2.83M	395.7M	-384.28K	-11.97%
Dec 31, 2023	CAPITAL WORLD INVESTORS	1.03%	1.31M	183.6M	675.73K	+106.23%
Dec 31, 2023	STATE STREET CORP	0.94%	1.2M	167.55M	68.7K	+6.09%
Dec 31, 2023	PACER ADVISORS, INC.	0.89%	1.14M	159.92M	66.61K	+6.19%
Dec 31, 2023	DIMENSIONAL FUND ADVISORS LP	0.8%	1.03M	143.61M	-76.48K	-6.94%
Dec 31, 2023	SOROBAN CAPITAL PARTNERS LP	0.68%	871.48K	121.97M	-27.36K	-3.04%
Dec 31, 2023	GOLDMAN SACHS GROUP INC	0.54%	689.4K	96.49M	-16.09K	-2.28%
Dec 31, 2023	MIRAE ASSET GLOBAL INVESTMENTS CO., LTD.	0.53%	672.1K	94.07M	-10.73K	-1.57%
Dec 31, 2023	CITADEL ADVISORS LLC	0.45%	580.48K	81.24M	-190.18K	-24.68%
Dec 31, 2023	NUVEEN ASSET MANAGEMENT, LLC	0.41%	530.41K	74.24M	11.74K	+2.26%
Dec 31, 2023	GEODE CAPITAL MANAGEMENT, LLC	0.38%	485.54K	67.83M	11.4K	+2.41%
Dec 31, 2023	INVESCO LTD.	0.33%	428.01K	59.9M	123.58K	+40.59%
Dec 31, 2023	FIRST TRUST ADVISORS LP	0.32%	411.82K	57.64M	-61.83K	-13.05%
Dec 31, 2023	SAMLYN CAPITAL, LLC	0.31%	393.29K	55.05M	76.56K	+24.17%
Dec 31, 2023	NORGES BANK	0.28%	364.11K	50.96M	364.11K	+100.00%
Dec 31, 2023	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	0.28%	352.92K	49.4M	8.29K	+2.41%
Dec 31, 2023	BANK OF NEW YORK MELLON CORP	0.27%	349.18K	48.87M	-26.14K	-6.97%
Dec 31, 2023	NORTHERN TRUST CORP	0.24%	302.29K	42.31M	-19.6K	-6.09%
Dec 31, 2023	PROSHARE ADVISORS LLC	0.2%	259.22K	36.28M	-17K	-6.15%
Dec 31, 2023	MORGAN STANLEY	0.2%	255.9K	35.82M	-74.13K	-22.46%
Dec 31, 2023	LEGAL & GENERAL GROUP PLC	0.2%	251.15K	35.15M	46.37K	+22.64%
Dec 31, 2023	ALLSPRING GLOBAL INVESTMENTS HOLDINGS, LLC	0.18%	234.88K	32.87M	-55.44K	-19.10%
Dec 31, 2023	ROBOTTI ROBERT	0.18%	226.57K	31.71M	-1.06K	-0.46%
Dec 31, 2023	UBS ASSET MANAGEMENT AMERICAS INC	0.16%	210.09K	29.4M	2.12K	+1.02%
Dec 31, 2023	AQR CAPITAL MANAGEMENT LLC	0.15%	195.47K	27.36M	-115.15K	-37.07%
Dec 31, 2023	FEDERATED HERMES, INC.	0.15%	192.11K	26.89M	-216.19K	-52.95%
Dec 31, 2023	JANUS HENDERSON GROUP PLC	0.13%	172.44K	24.13M	-33.18K	-16.13%
Dec 31, 2023	GRANTHAM, MAYO, VAN OTTERLOO & CO. LLC	0.1%	132.45K	18.54M	-95.02K	-41.77%
Dec 31, 2023	SWISS NATIONAL BANK	0.09%	119.4K	16.71M	-3.8K	-3.08%
Dec 31, 2023	AMERIPRISE FINANCIAL INC	0.09%	118.38K	16.57M	-6.48K	-5.19%
Dec 31, 2023	PRINCIPAL FINANCIAL GROUP INC	0.09%	117.62K	16.46M	-170	-0.14%
Dec 31, 2023	BANK OF MONTREAL /CAN/	0.09%	111.33K	15.88M	107.86K	+3,101.98%
Dec 31, 2023	SCOUT INVESTMENTS, INC.	0.08%	106.34K	14.88M	-17.67K	-14.25%
Dec 31, 2023	TUDOR INVESTMENT CORP ET AL	0.08%	99.75K	13.96M	24.58K	+32.70%
Dec 31, 2023	RHUMBLINE ADVISERS	0.07%	95.77K	13.4M	-1.74K	-1.78%
Dec 31, 2023	JPMORGAN CHASE & CO	0.07%	93.29K	13.06M	1.64K	+1.79%
Dec 31, 2023	SPROTT INC.	0.07%	90K	12.6M	-5K	-5.26%
Dec 31, 2023	SUMITOMO MITSUI TRUST HOLDINGS, INC.	0.07%	89.31K	12.5M	445	+0.50%
Dec 31, 2023	VIDENT ADVISORY, LLC	0.07%	85.72K	12M	293	+0.34%
Dec 31, 2023	WORLDQUANT MILLENNIUM ADVISORS LLC	0.07%	85.4K	11.95M	-34.27K	-28.64%
Dec 31, 2023	KBC GROUP NV	0.07%	85.01K	11.9M	-10.34K	-10.84%
Dec 31, 2023	TWO SIGMA INVESTMENTS, LP	0.07%	84.97K	11.89M	-14.65K	-14.71%
Dec 31, 2023	GUGGENHEIM CAPITAL LLC	0.07%	83.54K	11.69M	-4.35K	-4.95%
Dec 31, 2023	CAISSE DE DEPOT ET PLACEMENT DU QUEBEC	0.06%	82.15K	11.5M	-65.01K	-44.18%
Dec 31, 2023	EXODUSPOINT CAPITAL MANAGEMENT, LP	0.06%	79.49K	11.13M	-41.04K	-34.05%

WLK Insiders

Insiders	Designation	Shares Held
TTWFGP LLC	10 percent owner	47.26M
CHAO ALBERT	President & CEO	472.98K
BENDER MARK STEVEN	EVP & CFO	40.36K
EDERINGTON L. BENJAMIN	EVP, GC, CAO and Secretary	37.42K
KEARNS ROGER L.	COO and EVP - PEM	26.39K
BUESINGER ROBERT F.	EVP, HIP, IT & Digital	17.64K
KENNER ANDREW	SVP - Chemical Manufacturing	11.44K
CHAO DAVID TSUNG-HUNG	director	7.78K
TEEL LAWRENCE E.	EVP and Special Advisor to CEO	4.9K
ZOELLER JOHNATHAN STEVAN	VP & Chief Accounting Officer	543

Buying/Selling by Insiders

Date	Insider	Type	Cost	Shares	Value ($)	Shares Total
Nov 29, 2024	CHAO DAVID TSUNG-HUNG	SALE	129.08	1.75K	225.89K	7.78K
Nov 22, 2024	CHAO DAVID TSUNG-HUNG	SALE	130.00	1.75K	227.5K	9.53K
May 09, 2024	BUESINGER ROBERT F.	SALE	158.50	3.5K	554.75K	17.64K
May 03, 2024	BENDER MARK STEVEN	SALE	152.19	4.95K	753.34K	40.36K
Mar 15, 2024	BUESINGER ROBERT F.	SALE	144.50	3.88K	560.37K	21.14K
Mar 13, 2024	BUESINGER ROBERT F.	SALE	144.50	122	17.63K	25.02K
Mar 06, 2024	BENDER MARK STEVEN	SALE	141.02	4.8K	677.46K	45.31K
Feb 26, 2024	BENDER MARK STEVEN	SALE	137.57	4.85K	667.76K	50.11K
Nov 15, 2023	BUESINGER ROBERT F.	SALE	130.50	4.22K	550.06K	16.75K
Aug 23, 2023	CHAO DAVID TSUNG-HUNG	SALE	131.00	1K	131K	10.15K
Aug 31, 2022	BUESINGER ROBERT F.	SALE	98.94	1K	98.94K	10.21K
Aug 26, 2022	ZOELLER JOHNATHAN STEVAN	SALE	107.08	542	58.04K	543
May 27, 2022	BUESINGER ROBERT F.	SALE	129.47	14.43K	1.87M	11.78K
May 19, 2022	CHAO ALBERT	SALE	129.38	5.05K	652.71K	472.98K
May 17, 2022	KEARNS ROGER L.	SALE	136.24	8.39K	1.14M	26.39K
May 05, 2022	EDERINGTON L. BENJAMIN	SALE	139.26	3.14K	437.69K	37.42K
Mar 31, 2022	BENDER MARK STEVEN	SALE	124.99	100	12.5K	30.73K
Mar 30, 2022	BENDER MARK STEVEN	SALE	125.10	3.06K	383.04K	30.73K
Mar 29, 2022	BENDER MARK STEVEN	SALE	122.44	4K	489.75K	30.73K
Mar 25, 2022	KEARNS ROGER L.	SALE	126.40	2.86K	361.64K	26.39K
Mar 25, 2022	BENDER MARK STEVEN	SALE	125.74	2.95K	370.56K	30.73K
Mar 24, 2022	BENDER MARK STEVEN	SALE	125.38	8K	1M	30.73K
Mar 23, 2022	BENDER MARK STEVEN	SALE	125.69	344	43.24K	30.73K
Mar 10, 2022	BUESINGER ROBERT F.	SALE	117.61	22.56K	2.65M	14.84K
Mar 09, 2022	BUESINGER ROBERT F.	SALE	115.55	2.73K	315.45K	14.84K
Mar 01, 2022	ZOELLER JOHNATHAN STEVAN	SALE	110.39	1.01K	111.05K	1.16K
Dec 02, 2021	CHAO ALBERT	SALE	92.29	20.33K	1.88M	441.94K
Dec 01, 2021	CHAO ALBERT	SALE	94.80	3.79K	359.2K	441.94K
Nov 11, 2021	BENDER MARK STEVEN	SALE	101.57	2.37K	240.62K	22.02K
Nov 08, 2021	BENDER MARK STEVEN	SALE	100.77	631	63.59K	24.39K
Nov 05, 2021	BENDER MARK STEVEN	SALE	98.80	6.36K	627.95K	25.02K
Aug 11, 2021	CHAO ALBERT	PURCHASE	86.21	3K	258.63K	441.94K
May 10, 2021	BUESINGER ROBERT F.	SALE	105.00	5K	525K	8.22K
Mar 12, 2021	BENDER MARK STEVEN	SALE	95.23	5.82K	554.24K	31.38K
Mar 09, 2021	BENDER MARK STEVEN	SALE	92.27	25.81K	2.38M	31.38K
Mar 08, 2021	BUESINGER ROBERT F.	SALE	95.00	7.86K	746.8K	13.3K
Feb 25, 2021	TEEL LAWRENCE E.	SALE	87.14	4.9K	427.16K	4.9K
Feb 25, 2021	ZOELLER JOHNATHAN STEVAN	SALE	86.94	1.01K	87.46K	0
Nov 24, 2020	BUESINGER ROBERT F.	SALE	77.50	4.58K	355.03K	10.57K
Nov 23, 2020	KENNER ANDREW	SALE	74.75	5.92K	442.82K	11.44K
Nov 06, 2020	CHAO ALBERT	SALE	75.12	4.2K	315.35K	427.66K
Nov 06, 2020	BENDER MARK STEVEN	SALE	74.79	1.6K	119.67K	27.88K
Nov 05, 2020	BENDER MARK STEVEN	SALE	74.54	420	31.31K	29.48K
Mar 27, 2020	TTWFGP LLC	PURCHASE	37.58	16.98K	637.92K	47.26M
Mar 26, 2020	TTWFGP LLC	PURCHASE	40.47	42.2K	1.71M	47.14M
Mar 25, 2020	TTWFGP LLC	PURCHASE	37.98	6.65K	252.6K	46.97M
Mar 24, 2020	TTWFGP LLC	PURCHASE	34.94	4.74K	165.55K	46.83M
Mar 19, 2020	TTWFGP LLC	PURCHASE	35.23	3K	105.76K	46.66M
Mar 18, 2020	TTWFGP LLC	PURCHASE	30.58	25.97K	794.16K	46.52M
Mar 17, 2020	TTWFGP LLC	PURCHASE	35.06	100	3.51K	46.49M
Mar 16, 2020	TTWFGP LLC	PURCHASE	31.42	160K	5.03M	320K
Mar 13, 2020	TTWFGP LLC	PURCHASE	32.94	160K	5.27M	160K

Insider Transaction Summary (6 Months)

SHARESTRANS

PURCHASE00

SALES3.5K2

NET SHARES-3.5K2

SHARES HELD17.32K2

% NET SHARES-120.21%0%

WLK Stock Ownership Breakdown

Westlake Corporation

WLK Stock Outstanding Shares

Market Insider WLK

Institutional Ownership

WLK Insiders

Buying/Selling by Insiders

Insider Transaction Summary (6 Months)

Frequently Asked Questions

WLK Stock Outstanding Shares

Market Insider WLK

Institutional Ownership

WLK Insiders

Buying/Selling by Insiders

Insider Transaction Summary (6 Months)

Frequently Asked Questions