Mark Steven Bender Net Worth - Insider Trades and Bio as of Jun 8, 2026

WLKWESTLAKE CORPSEC CIK: 0001330417

Estimated Net Worth

$37 Million1.0%vs Last Year

Last Updated: May 19, 2026 11:14 PM EST

Transaction Summary

Total Transactions111

Buy-Sell Ratio0.08

Buy Transactions3

Sell Transactions39

Transaction Volume

Total Volume-$27.05M

Net Volume$27.69M

Buy Volume$317.52K

Sell Volume-$27.37M

Trade Analysis

AVG Trade Size-$302.80K

Largest Trade$240.00K

Most Active MonthFeb

Most Active Year2022

Trading Sentiment

OverallBullish

Recent TradeNeutral

Last 90 Days-1 Trades

ConvictionMedium

Net Worth & Trading Activity Over Time

Monthly Trading Pattern

Past Insider Trading and Trends

Mark Steven Bender has an estimated net worth of $37 Million. This is based on reported shares across multiple companies, which include WESTLAKE CORP, and Westlake Chemical Partners LP.

2022 was Mark Steven Bender's most active year for acquiring shares with 15 total transactions. Mark Steven Bender's most active month to acquire stocks was the month of January. 2011 was Mark Steven Bender's most active year for disposing of shares, totalling 47 transactions. Mark Steven Bender's most active month to dispose stocks was the month of January. 2023 saw Mark Steven Bender paying a total of $2,656,230.77 for 124,166 shares, this is the most they've acquired in one year. In 2018 Mark Steven Bender cashed out on 86,639 shares for a total of $5,557,415.65, their largest year based on trade value.

Holdings & Transactions

WLKwestlake corp

EVP & CFO

Updated: May 14, 2026VIEW QUOTE

Form Type	Δ Own, %	Traded Shares	Price	Size, $	Filing Date	Own, %	Type	Scheduled	Trade Dates	SEC Filing
From 4	-0.13	5.28K	$97.34	-$514.34K	May 14, 2026	35.90K	Options	—	May 12 - 13	View
From 4	-0.37	16.41K	$112.54	-$1.85M	Mar 30, 2026	28.02K	Sale	—	Mar 27	View
From 4/A	-0.04	1.17K	$104.96	-$122.91K	Mar 06, 2026	25.61K	Tax	—	Feb 16	View
From 4	-0.40	30.10K	$88.10	-$2.03M	Mar 02, 2026	44.43K	Sale	—	Feb 27	View
From 4	0.62	37.47K	$94.10	-$41.87K	Feb 23, 2026	97.98K	Grant	—	Feb 19 - 20	View
From 4	-0.02	1.21K	$98.95	-$119.63K	Feb 19, 2026	60.51K	Options	—	Feb 17 - 18	View
From 4	0.60	30.96K	$110.54	-$390.21K	Feb 24, 2025	82.64K	Grant	—	Feb 20 - 21	View
From 4	-0.08	4.45K	$111.51	-$495.77K	Feb 20, 2025	51.68K	Options	—	Feb 18 - 19	View
From 4	-0.03	1.16K	$145.44	-$168.13K	Aug 15, 2024	42.14K	Options	—	Aug 13 - 14	View
From 4	-0.11	4.95K	$152.19	-$753.34K	May 06, 2024	40.36K	Sale	—	May 03	View
From 4	-0.10	4.80K	$141.02	-$677.46K	Mar 07, 2024	45.31K	Sale	—	Mar 06	View
From 4	-0.09	4.85K	$137.57	-$667.76K	Feb 28, 2024	50.11K	Sale	—	Feb 26	View
From 4	0.10	5.01K	$130.70	-$803.02K	Feb 21, 2024	54.96K	Options	—	Feb 16 - 20	View
From 4	—	16.80K	—	—	Feb 20, 2024	16.80K	Grant	—	Feb 16	View
From 4	0.94	24.64K	$115.17	-$900.16K	Aug 09, 2023	50.89K	Options	—	Aug 07	View
From 4	—	13.16K	—	—	May 16, 2023	13.16K	Grant	—	May 12	View
From 4	0.02	1.08K	$92.92	-$58.77K	May 10, 2023	50.60K	Options	—	May 08	View
From 4/A	0.23	8.31K	$104.34	-$629.39K	Mar 15, 2023	44.40K	Grant	—	Feb 17 - 13	View
From 4	0.05	3.00K	$93.16	-$164.06K	Feb 28, 2023	57.72K	Options	—	Feb 27	View
From 4	—	17.72K	—	—	Feb 21, 2023	17.72K	Grant	—	Feb 17	View
From 4	0.40	14.34K	—	—	Feb 17, 2023	50.43K	Grant	—	Feb 17	View
From 4	-0.05	1.78K	$121.87	-$217.54K	Feb 16, 2023	36.09K	Options	—	Feb 14 - 15	View
From 4	-0.16	6.02K	$97.48	-$323.59K	Apr 01, 2022	30.73K	Sale	—	Mar 31	View
From 4	-0.14	6.00K	$98.81	-$311.88K	Mar 31, 2022	36.75K	Sale	—	Mar 30	View
From 4	-0.09	4.00K	$97.63	-$198.46K	Mar 30, 2022	42.75K	Sale	—	Mar 29	View
From 4	-0.15	8.00K	$99.08	-$420.15K	Mar 28, 2022	46.75K	Sale	—	Mar 25	View
From 4	-0.13	8.00K	$99.10	-$420.50K	Mar 25, 2022	54.75K	Sale	—	Mar 24 - 24	View
From 4	-0.09	6.00K	$99.00	-$314.08K	Mar 24, 2022	62.75K	Sale	—	Mar 23 - 23	View
From 4/A	0.20	5.11K	$118.51	-$333.01K	Mar 15, 2022	30.73K	Grant	—	Feb 18 - 14	View
From 4	—	28.97K	—	—	Feb 22, 2022	28.97K	Grant	—	Feb 18	View
From 4	0.31	7.92K	—	—	Feb 22, 2022	33.54K	Grant	—	Feb 18	View
From 4	-0.04	1.17K	$104.96	-$122.38K	Feb 17, 2022	25.61K	Options	—	Feb 15 - 16	View
From 4	-0.10	2.37K	$101.57	-$240.62K	Nov 15, 2021	22.02K	Sale	—	Nov 11	View
From 4	-0.03	631.00	$100.77	-$63.59K	Nov 10, 2021	24.39K	Sale	—	Nov 08	View
From 4	-0.20	6.36K	$98.80	-$627.95K	Nov 08, 2021	25.02K	Sale	—	Nov 05	View
From 4	—	2.94K	—	—	Aug 16, 2021	2.94K	Grant	—	Aug 13	View
From 4	-0.33	15.74K	$72.77	-$690.47K	Mar 15, 2021	31.38K	Sale	—	Mar 12	View
From 4	-0.42	25.81K	$77.47	-$764.10K	Mar 10, 2021	36.38K	Sale	—	Mar 09	View
From 4	—	24.66K	—	—	Feb 22, 2021	24.66K	Grant	—	Feb 19	View
From 4	-0.03	808.00	$85.08	-$68.75K	Feb 18, 2021	31.38K	Options	—	Feb 16 - 18	View
From 4	0.01	394.00	$86.56	-$349.52	Feb 17, 2021	28.96K	Options	—	Feb 14 - 16	View
From 4	0.01	394.00	$86.56	-$349.52	Feb 17, 2021	28.96K	Options	—	Feb 14 - 16	View
From 4	-0.05	1.60K	$74.79	-$119.67K	Nov 10, 2020	27.88K	Sale	—	Nov 06	View
From 4	-0.46	25.00K	$59.21	-$739.12K	Nov 06, 2020	29.48K	Sale	—	Nov 05	View
From 4	-0.05	1.46K	$60.52	-$88.18K	Feb 19, 2020	29.48K	Options	—	Feb 17 - 18	View
From 4	—	38.87K	—	—	Feb 18, 2020	38.87K	Grant	—	Feb 14	View
From 4	-0.12	3.37K	$67.01	-$226.08K	Dec 03, 2019	25.56K	Options	—	Dec 01 - 03	View
From 4	-0.08	1.76K	$73.51	-$129.52K	Feb 20, 2019	20.61K	Options	—	Feb 18 - 19	View
From 4	—	22.82K	—	—	Feb 19, 2019	22.82K	Grant	—	Feb 15 - 15	View
From 4	-0.43	12.07K	$95.46	-$660.55K	May 22, 2018	15.81K	Sale	—	May 21	View
From 4	-0.60	23.51K	$72.68	-$2.10M	May 14, 2018	15.81K	Sale	—	May 11	View
From 4	-0.24	5.00K	$111.69	-$558.47K	Feb 27, 2018	15.81K	Sale	—	Feb 26	View
From 4	-0.09	2.00K	$110.64	-$221.27K	Feb 26, 2018	20.81K	Sale	—	Feb 22	View
From 4	-0.15	4.00K	$110.97	-$443.88K	Feb 23, 2018	22.81K	Sale	—	Feb 22	View
From 4	-0.03	876.00	$106.98	-$93.71K	Feb 22, 2018	26.81K	Options	—	Feb 20 - 21	View
From 4	—	15.26K	—	—	Feb 20, 2018	15.26K	Grant	—	Feb 16	View
From 4/A	0.14	4.41K	$44.62	-$267.77K	Dec 19, 2017	36.28K	Sell-Options	—	Nov 26 - 26	View
From 4	0.27	6.50K	$60.38	-$486.95K	Dec 05, 2017	30.75K	Sell-Options	—	Dec 04	View
From 4	-0.46	20.38K	$94.27	-$1.92M	Nov 22, 2017	24.07K	Sale	—	Nov 21	View
From 4	-0.40	29.80K	$52.14	-$2.50M	Nov 15, 2017	44.45K	Sale	—	Nov 13	View
From 4	-0.24	13.79K	$70.22	-$968.62K	Aug 16, 2017	44.45K	Sale	—	Aug 15	View
From 4	-0.17	12.00K	$64.32	-$771.78K	Mar 13, 2017	58.24K	Sale	—	Mar 10	View
From 4	—	26.37K	—	—	Feb 22, 2017	26.37K	Grant	—	Feb 17	View
From 4	-0.01	909.00	$64.01	-$58.19K	Feb 16, 2017	70.24K	Options	—	Feb 14 - 15	View
From 4	—	8.32K	—	—	Dec 05, 2016	8.32K	Grant	—	Dec 01	View
From 4	-0.09	6.75K	$33.87	$134.96K	Aug 25, 2016	68.00K	Options	—	Aug 23 - 24	View
From 4	—	31.56K	—	—	Feb 22, 2016	31.56K	Grant	—	Feb 18	View
From 4	-0.03	1.17K	$43.52	-$51.01K	Feb 18, 2016	44.04K	Options	—	Feb 15 - 17	View
From 4	—	15.69K	—	—	Feb 24, 2015	15.69K	Grant	—	Feb 20	View
From 4	-0.04	1.82K	$66.79	-$121.75K	Feb 20, 2015	41.17K	Tax	—	Feb 18	View
From 4	-0.74	17.72K	$82.60	-$1.81M	Mar 04, 2014	36.85K	Sale	—	Mar 03	View
From 4	-0.05	1.19K	$129.00	-$153.51K	Feb 21, 2014	21.50K	Tax	—	Feb 19	View
From 4	—	6.48K	—	—	Feb 19, 2014	6.48K	Grant	—	Feb 14	View
From 4	-0.11	2.93K	$101.00	-$295.93K	Aug 14, 2013	22.69K	Sale	—	Aug 12	View
From 4	-0.10	3.00K	$101.00	-$303.00K	Aug 12, 2013	25.62K	Sale	—	Aug 08	View
From 4	-0.13	4.43K	$61.37	-$297.90K	Mar 26, 2013	28.62K	Sale	—	Mar 25	View
From 4	-0.05	1.58K	$84.10	-$133.12K	Mar 04, 2013	28.62K	Tax	—	Feb 28	View
From 4	—	7.39K	—	—	Feb 20, 2013	7.39K	Grant	—	Feb 15	View
From 4	-0.17	6.08K	$73.25	-$445.58K	Dec 05, 2012	30.20K	Sale	—	Dec 03	View
From 4	0.12	4.41K	$44.55	-$267.15K	Nov 28, 2012	40.69K	Sell-Options	—	Nov 26	View
From 4	0.03	1.22K	$45.10	-$75.29K	Nov 27, 2012	45.10K	Sell-Options	—	Nov 23	View
From 4	-0.07	2.90K	$57.50	-$166.75K	Feb 28, 2012	36.28K	Tax	—	Feb 24	View
From 4/A	0.33	11.69K	—	—	Feb 23, 2012	47.59K	Grant	—	Feb 17	View
From 4	-0.46	45.10K	$34.95	-$1.01M	Feb 22, 2012	50.35K	Sale	—	Feb 25	View
From 4	-0.11	4.41K	$57.12	-$251.77K	Feb 16, 2012	35.91K	Tax	—	Feb 14	View
From 4	-0.32	25.03K	$31.80	-$728.36K	Feb 28, 2011	50.35K	Sale	—	Feb 25	View
From 4	0.22	8.43K	$43.41	-$40.29K	Feb 22, 2011	46.91K	Grant	—	Feb 17 - 18	View
From 4	-0.00	116.00	$43.92	-$5.09K	Jan 05, 2011	38.48K	Tax	—	Jan 03	View
From 4	-0.03	1.00K	$28.17	-$28.17K	Aug 10, 2010	38.60K	Sale	—	Aug 09	View
From 4	0.62	20.80K	—	—	Mar 02, 2010	54.50K	Grant	—	Feb 26	View
From 4	-0.01	375.00	$20.33	-$7.65K	Feb 26, 2010	33.70K	Tax	—	Feb 24	View
From 4	-0.00	117.00	$25.17	-$2.94K	Jan 06, 2010	34.08K	Tax	—	Jan 04	View
From 4/A	0.57	11.03K	—	—	Mar 19, 2009	30.54K	Grant	—	Feb 19	View
From 4	1.84	41.69K	—	—	Feb 18, 2009	64.41K	Grant	—	Feb 13	View
From 4	-0.00	113.00	$16.31	-$1.84K	Jan 02, 2009	22.72K	Tax	—	Jan 02	View
From 4	-0.00	59.00	$12.56	-$741.15	Mar 18, 2008	22.83K	Tax	—	Mar 17	View
From 4	0.56	11.03K	—	—	Feb 21, 2008	30.66K	Grant	—	Feb 19	View
From 4	-0.04	114.00	$31.97	-$3.64K	Jan 10, 2008	2.74K	Tax	—	Jan 04	View
From 4	-0.01	117.00	$19.04	-$2.23K	Jan 04, 2008	19.62K	Tax	—	Jan 02	View
From 4	-0.00	15.00	$26.85	-$402.75	Sep 05, 2007	19.74K	Tax	—	Sep 04	View
From 4	-0.00	51.00	$27.55	-$1.41K	Mar 19, 2007	19.75K	Tax	—	Mar 16	View
From 4	17.54	50.03K	—	—	Mar 05, 2007	52.88K	Grant	—	Mar 02	View
From 4	-0.01	15.00	$29.83	-$447.45	Sep 05, 2006	2.85K	Tax	—	Sep 01	View
From 4	0.64	1.48K	—	—	Mar 22, 2006	3.79K	Grant	—	Mar 20	View
From 4	14.02	5.42K	—	—	Oct 07, 2005	5.81K	Grant	—	Oct 06	View
From 4	—	387.00	—	—	Sep 13, 2005	387.00	Grant	—	Sep 09	View
From 3	—	—	—	—	Jun 17, 2005	—	—	—	—	View

WLKPwestlake chemical partners lp

SVP, CFO Director

Updated: Mar 16, 2020VIEW QUOTE

Form Type	Δ Own, %	Traded Shares	Price	Size, $	Filing Date	Own, %	Type	Scheduled	Trade Dates	SEC Filing
From 4	0.17	2.00K	$14.99	$29.99K	Mar 16, 2020	14.00K	Purchase	—	Mar 12 - 13	View
From 4	0.20	2.00K	$23.77	$47.54K	Feb 27, 2018	12.00K	Purchase	—	Feb 27	View
From 4	—	10.00K	$24.00	$240.00K	Aug 06, 2014	10.00K	Purchase	—	Aug 04	View
From 3	—	—	—	—	Jul 29, 2014	—	—	—	—	View

Benzinga

Benzinga

Net Worth & Trading Activity Over Time

Monthly Trading Pattern

Past Insider Trading and Trends

Holdings & Transactions