Insider at

04

Insider transactions

05
0 buys (P) 0 sells (S) Net: $0 + 82 non-open-market transactions below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

82 other filings hidden
DateTickerCodeSharesPriceValue Owned afterΔ ownA/Dvs now
Feb. 22, 2018 WLK S 100 $111.41 $11,141 3,280 Direct -2.96% Disposed -43.0% (price as of 2026-10-02)
Feb. 22, 2018 WLK S 17,458 $110.93 $1,936,616 3,380 Direct -83.78% Disposed -42.8% (price as of 2026-10-02)
Aug. 4, 2014 WLKP P 125,000 $24.00 $3,000,000 125,000 Direct · Acquired -11.4% (price as of 2026-10-02)
Nov. 11, 2013 WLK S 700 $113.39 $79,373 7,899 Direct -8.14% Disposed 12.0% (price as of 2026-10-02)
Nov. 11, 2013 WLK S 188 $113.37 $21,314 8,599 Direct -2.14% Disposed 12.0% (price as of 2026-10-02)
Aug. 1, 2013 WLK S 12,786 $105.71 $1,351,608 25,163 Direct -33.69% Disposed 20.1% (price as of 2026-10-02)
March 11, 2013 WLK S 100 $92.78 $9,278 7,899 Direct -1.25% Disposed 36.9% (price as of 2026-10-02)
March 11, 2013 WLK S 300 $92.74 $27,822 7,999 Direct -3.61% Disposed 36.9% (price as of 2026-10-02)
March 11, 2013 WLK S 144 $92.66 $13,343 8,299 Direct -1.71% Disposed 37.1% (price as of 2026-10-02)
March 11, 2013 WLK S 1,200 $92.65 $111,180 8,443 Direct -12.44% Disposed 37.1% (price as of 2026-10-02)
March 11, 2013 WLK S 100 $92.64 $9,264 9,643 Direct -1.03% Disposed 37.1% (price as of 2026-10-02)
May 10, 2012 WLK S 5,765 $57.35 $330,623 6,588 Direct -46.67% Disposed 121.4% (price as of 2026-10-02)
May 10, 2011 WLK S 300 $60.61 $18,183 8,225 Direct -3.52% Disposed 109.5% (price as of 2026-10-02)
May 10, 2011 WLK S 184 $60.63 $11,156 8,525 Direct -2.11% Disposed 109.5% (price as of 2026-10-02)
May 10, 2011 WLK S 500 $60.64 $30,320 8,709 Direct -5.43% Disposed 109.4% (price as of 2026-10-02)
May 10, 2011 WLK S 400 $60.66 $24,264 9,209 Direct -4.16% Disposed 109.4% (price as of 2026-10-02)
May 10, 2011 WLK S 4,000 $60.67 $242,680 9,609 Direct -29.39% Disposed 109.3% (price as of 2026-10-02)
May 10, 2011 WLK S 200 $60.69 $12,138 13,609 Direct -1.45% Disposed 109.3% (price as of 2026-10-02)

Showing latest 100 of 117 transactions

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Derivative holdings (Form 4 Table II) Options, RSUs and convertible securities reported on Form 4 Table II.

06
DateTickerSecurityUnderlying Exercise priceExpirationSharesA/D
Aug. 19, 2019 WLKP Phantom Units Common Units (3,232) · Sept. 19, 2019 3,232 Disposed
Aug. 17, 2019 WLK Restricted Stock Units Common Stock (1,003) · · 1,003 Disposed
Aug. 17, 2019 WLK Restricted Stock Units Common Stock (1,409) · · 1,409 Disposed
Aug. 16, 2019 WLK Restricted Stock Units Common Stock (2,387) · · 2,387 Acquired
Aug. 15, 2019 WLKP Phantom Units Common Units (3,259) · Sept. 15, 2019 3,259 Disposed
Aug. 14, 2019 WLKP Phantom Units Common Units (4,638) · Sept. 14, 2020 4,638 Acquired
Aug. 21, 2018 WLK Restricted Stock Units Common Stock (603) · · 603 Acquired
Aug. 19, 2018 WLKP Phantom Units Common Units (3,341) · Aug. 19, 2018 3,341 Disposed
Aug. 18, 2018 WLK Restricted Stock Units Common Stock (1,721) · · 1,721 Disposed
Aug. 17, 2018 WLK Restricted Stock Units Common Stock (1,003) · · 1,003 Disposed
Aug. 17, 2018 WLK Restricted Stock Units Common Stock (1,409) · · 1,409 Acquired
Aug. 16, 2018 WLKP Phantom Units Common Units (3,382) · Aug. 16, 2018 3,382 Disposed
Aug. 15, 2018 WLKP Phantom Units Common Units (3,259) · Sept. 15, 2019 3,259 Acquired
May 18, 2018 WLK Restricted Stock Units Common Stock (103) · · 103 Acquired
Aug. 22, 2017 WLK Restricted Stock Units Common Stock (357) · · 357 Disposed
Aug. 21, 2017 WLK Restricted Stock Units Common Stock (603) · · 603 Disposed
Aug. 20, 2017 WLKP Phantom Units Common Units (2,202) · Aug. 20, 2017 2,202 Acquired
Aug. 18, 2017 WLK Restricted Stock Units Common Stock (1,721) · · 1,721 Acquired
Aug. 17, 2017 WLK Restricted Stock Units Common Stock (1,003) · · 1,003 Disposed
Aug. 16, 2017 WLKP Phantom Units Common Units (3,382) · Sept. 15, 2018 3,382 Acquired
Aug. 23, 2016 WLK Restricted Stock Units Common Stock (588) · · 588 Disposed
Aug. 22, 2016 WLK Restricted Stock Units Common Stock (357) · · 357 Disposed
Aug. 22, 2016 WLK Restricted Stock Units Common Stock (603) · · 603 Disposed
Aug. 19, 2016 WLKP Phantom Units Common Units (3,232) · Sept. 18, 2019 3,232 Acquired
Aug. 17, 2016 WLK Restricted Stock Units Common Stock (3,009) · Aug. 17, 2026 3,009 Acquired
Aug. 23, 2015 WLK Restricted Stock Units Common Stock (586) · · 586 Disposed
Aug. 22, 2015 WLK Restricted Stock Units Common Stock (357) · · 357 Disposed
Aug. 21, 2015 WLK Restricted Stock Units Common Stock (1,809) · Aug. 21, 2025 1,809 Acquired
Aug. 19, 2015 WLKP Phantom Units Common Units (3,341) · Sept. 18, 2018 3,341 Acquired
Aug. 23, 2014 WLK Restricted Stock Units Common Stock (586) · · 586 Disposed
Aug. 22, 2014 WLK Restricted Stock Units Common Stock (1,071) · Aug. 22, 2024 1,071 Acquired
Aug. 20, 2014 WLKP Phantom Units Common Units (2,202) · Sept. 19, 2017 2,202 Acquired
Nov. 11, 2013 WLK Employee Option (right to buy) Common Stock (888) $24.51 Aug. 20, 2019 888 Disposed
Aug. 23, 2013 WLK Restricted Stock Units Common Stock (880) · · 880 Acquired
Aug. 1, 2013 WLK Employee Option (right to buy) Common Stock (2,590) $45.83 Feb. 18, 2021 2,590 Disposed
Aug. 1, 2013 WLK Employee Option (right to buy) Common Stock (1,261) $60.10 Feb. 17, 2022 1,261 Disposed
Aug. 1, 2013 WLK Employee Option (right to buy) Common Stock (8,935) $20.52 Feb. 26, 2020 8,935 Disposed
March 11, 2013 WLK Employee Option (right to buy) Common Stock (957) $20.82 Aug. 15, 2018 957 Disposed
March 11, 2013 WLK Employee Option (right to buy) Common Stock (887) $24.51 Aug. 20, 2019 887 Disposed
May 10, 2012 WLK Common Stock Common Stock (887) $24.51 Aug. 20, 2019 887 Acquired
May 10, 2012 WLK Common Stock Common Stock (480) $27.12 Aug. 17, 2017 480 Acquired
May 10, 2011 WLK Employee Option (right to buy) (Common Stock) Common Stock (887) $24.51 Aug. 20, 2020 887 Acquired
May 10, 2011 WLK Employee Option (right to buy) (Common Stock Common Stock (1,912) $20.82 Aug. 15, 2020 1,912 Acquired
May 10, 2011 WLK Employee Option (right to buy) Common Stock Common Stock (1,440) $27.12 Aug. 17, 2020 1,440 Acquired
May 10, 2011 WLK Employee Option (right to buy) Common Stock (1,345) $30.07 Aug. 21, 2020 1,345 Acquired
March 3, 2011 WLK Employee Option (right to buy) Common Stock (2,759) $14.50 Aug. 16, 2017 2,759 Acquired
Aug. 20, 2009 WLK Common Stock Common Stock (3,549) $24.51 Aug. 20, 2019 3,549 Acquired
Aug. 15, 2008 WLK Common Stock Common Stock (957) $20.82 Aug. 15, 2018 957 Acquired
Aug. 15, 2008 WLK Common Stock Common Stock (3,826) $20.82 Aug. 15, 2018 3,826 Acquired
Aug. 17, 2007 WLK Common Stock Common Stock (1,920) $27.12 Aug. 17, 2017 1,920 Acquired
Aug. 21, 2006 WLK Options (right to buy) Common Stock (1,345) $30.07 Aug. 21, 2016 1,345 Acquired
Aug. 16, 2004 WLK Incentive Stock Option Common Stock (2,759) $14.50 Aug. 16, 2014 2,759 Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).