Insider at

04

Insider transactions

05
0 buys (P) 0 sells (S) Net: $0 + 69 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

69 other filings hidden
DateTickerCodeSharesPriceValue Owned afterΔ ownA/Dvs now
Aug. 12, 2024 WLKP P 2,692 $22.63 $60,920 185,000 Direct +1.48% Acquired -6.0% (price as of 2026-10-02)
Aug. 9, 2024 WLKP P 12,000 $22.99 $275,880 182,308 Direct +7.05% Acquired -7.5% (price as of 2026-10-02)
May 30, 2024 WLKP P 2,291 $22.23 $50,929 170,308 Direct +1.36% Acquired -4.3% (price as of 2026-10-02)
May 10, 2024 WLKP P 7,178 $22.07 $158,418 168,017 Direct +4.46% Acquired -3.6% (price as of 2026-10-02)
May 8, 2024 WLKP P 10,000 $22.10 $221,000 160,839 Direct +6.63% Acquired -3.8% (price as of 2026-10-02)
March 28, 2024 WLKP P 5,000 $22.23 $111,150 150,839 Direct +3.43% Acquired -4.3% (price as of 2026-10-02)
March 21, 2024 WLKP P 4,230 $22.16 $93,737 145,839 Direct +2.99% Acquired -4.0% (price as of 2026-10-02)
March 6, 2024 WLKP P 5,000 $22.30 $111,500 141,609 Direct +3.66% Acquired -4.6% (price as of 2026-10-02)
Feb. 22, 2024 WLKP P 10,000 $22.12 $221,200 136,609 Direct +7.90% Acquired -3.8% (price as of 2026-10-02)
Nov. 9, 2023 WLKP P 5,000 $21.48 $107,400 126,609 Direct +4.11% Acquired -1.0% (price as of 2026-10-02)
Nov. 6, 2023 WLKP P 10,000 $22.02 $220,200 121,609 Direct +8.96% Acquired -3.4% (price as of 2026-10-02)
Aug. 29, 2023 WLKP P 10,000 $22.74 $227,400 111,609 Direct +9.84% Acquired -6.5% (price as of 2026-10-02)
Aug. 22, 2023 WLKP P 11,762 $22.30 $262,293 101,609 Direct +13.09% Acquired -4.6% (price as of 2026-10-02)
Aug. 21, 2023 WLKP P 643 $22.11 $14,217 89,847 Direct +0.72% Acquired -3.8% (price as of 2026-10-02)
Aug. 17, 2023 WLKP P 5,000 $22.08 $110,400 89,204 Direct +5.94% Acquired -3.7% (price as of 2026-10-02)
Aug. 16, 2023 WLKP P 3,349 $22.23 $74,448 84,204 Direct +4.14% Acquired -4.3% (price as of 2026-10-02)
Aug. 15, 2023 WLKP P 855 $22.00 $18,810 80,855 Direct +1.07% Acquired -3.3% (price as of 2026-10-02)
Aug. 10, 2023 WLKP P 5,000 $22.55 $112,750 80,000 Direct +6.67% Acquired -5.7% (price as of 2026-10-02)
Aug. 9, 2023 WLKP P 5,000 $23.00 $115,000 75,000 Direct +7.14% Acquired -7.5% (price as of 2026-10-02)
Aug. 7, 2023 WLKP P 5,000 $23.00 $115,000 70,000 Direct +7.69% Acquired -7.5% (price as of 2026-10-02)
March 13, 2023 WLKP P 5,000 $21.44 $107,200 65,000 Direct +8.33% Acquired -0.8% (price as of 2026-10-02)
March 10, 2023 WLKP P 10,000 $22.02 $220,200 60,000 Direct +20.00% Acquired -3.4% (price as of 2026-10-02)
Nov. 15, 2022 WLKP P 4,362 $22.97 $100,195 50,000 Direct +9.56% Acquired -7.4% (price as of 2026-10-02)
Nov. 10, 2022 WLKP P 5,638 $22.98 $129,561 45,638 Direct +14.09% Acquired -7.4% (price as of 2026-10-02)
March 8, 2022 WLKP P 10,000 $26.34 $263,400 40,000 Direct +33.33% Acquired -19.2% (price as of 2026-10-02)
March 7, 2022 WLKP P 8,000 $26.15 $209,200 30,000 Direct +36.36% Acquired -18.7% (price as of 2026-10-02)
Nov. 23, 2020 WLK S 5,924 $74.75 $442,819 11,437 Direct -34.12% Disposed -15.1% (price as of 2026-10-02)
March 9, 2018 WLK S 6,028 $120.00 $723,360 11,437 Direct -34.51% Disposed -47.1% (price as of 2026-10-02)
March 5, 2018 WLK S 24,318 $110.61 $2,689,814 14,053 Direct -63.38% Disposed -42.6% (price as of 2026-10-02)
May 6, 2015 WLK S 2,161 $72.32 $156,284 10,020 Direct -17.74% Disposed -12.2% (price as of 2026-10-02)
May 6, 2015 WLK S 8,618 $72.27 $622,823 12,181 Direct -41.43% Disposed -12.1% (price as of 2026-10-02)

Showing latest 100 of 158 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
Feb. 18, 2022 WLK Employee Option (right to buy) Common Stock (7,011) $108.12 Feb. 18, 2032 7,011 Acquired
Feb. 18, 2022 WLK Restricted Stock Units Common Stock (2,218) · · 2,218 Acquired
Feb. 15, 2022 WLK Restricted Stock Units Common Stock (2,859) · · 2,859 Disposed
Feb. 19, 2021 WLK Employee Option (right to buy) Common Stock (9,336) $86.54 Feb. 19, 2031 9,336 Acquired
Feb. 19, 2021 WLK Restricted Stock Units Common Stock (2,717) · · 2,717 Acquired
Feb. 16, 2021 WLK Restricted Stock Units Common Stock (1,924) · · 1,924 Disposed
Feb. 14, 2021 WLK Restricted Stock Units Common Stock (830) · · 830 Disposed
Feb. 14, 2021 WLK Restricted Stock Units Common Stock (830) · · 830 Disposed
Feb. 17, 2020 WLK Restricted Stock Units Common Stock (2,647) · · 2,647 Disposed
Feb. 14, 2020 WLK Employee Option (right to buy) Common Stock (15,112) $65.81 Feb. 14, 2030 15,112 Acquired
Feb. 14, 2020 WLK Restricted Stock Units Common Stock (3,572) · · 3,572 Acquired
Feb. 14, 2020 WLK Restricted Stock Units Common Stock (830) · · 830 Acquired
Dec. 1, 2019 WLK Restricted Stock Units Common Stock (3,330) · · 3,330 Disposed
Feb. 18, 2019 WLK Restricted Stock Units Common Stock (2,844) · · 2,844 Disposed
Feb. 15, 2019 WLK Employee Option (right to buy) Common Stock (10,860) $79.83 Feb. 15, 2029 10,860 Acquired
Feb. 15, 2019 WLK Restricted Stock Units Common Stock (2,859) · · 2,859 Acquired
March 9, 2018 WLK Employee Option (right to buy) Common Stock (3,412) $61.86 Feb. 17, 2027 3,412 Disposed
March 5, 2018 WLK Employee Option (right to buy) Common Stock (7,145) $44.42 Feb. 18, 2026 7,145 Disposed
March 5, 2018 WLK Employee Option (right to buy) Common Stock (6,007) $68.09 Feb. 20, 2025 6,007 Disposed
March 5, 2018 WLK Employee Option (right to buy) Common Stock (5,214) $63.98 Feb. 14, 2024 5,214 Disposed
March 5, 2018 WLK Employee Option (right to buy) Common Stock (5,952) $45.70 Feb. 15, 2023 5,952 Disposed
Feb. 20, 2018 WLK Restricted Stock Units Common Stock (1,802) · · 1,802 Disposed
Feb. 16, 2018 WLK Restricted Stock Units Common Stock (1,924) · · 1,924 Acquired
Feb. 16, 2018 WLK Employee Option (right to buy) Common Stock (7,168) $107.75 Feb. 16, 2028 7,168 Acquired
Feb. 17, 2017 WLK Restricted Stock Units Common Stock (2,647) · · 2,647 Acquired
Feb. 17, 2017 WLK Employee Option (right to buy) Common Stock (10,340) $61.86 Feb. 17, 2027 10,340 Acquired
Feb. 14, 2017 WLK Restricted Stock Units Common Stock (1,674) · · 1,674 Disposed
Dec. 1, 2016 WLK Restricted Stock Units Common Stock (3,330) · · 3,330 Acquired
Feb. 18, 2016 WLK Restricted Stock Units Common Stock (2,844) · · 2,844 Acquired
Feb. 18, 2016 WLK Employee Option (right to buy) Common Stock (10,827) $44.42 Feb. 18, 2026 10,827 Acquired
Feb. 15, 2016 WLK Restricted Stock Units Common Stock (2,238) · · 2,238 Disposed
May 6, 2015 WLK Employee Option (right to buy) Common Stock (2,526) $22.92 Feb. 18, 2021 2,526 Disposed
May 6, 2015 WLK Employee Option (right to buy) Common Stock (6,092) $30.05 Feb. 17, 2022 6,092 Disposed
Feb. 20, 2015 WLK Restricted Stock Units Common Stock (1,802) · · 1,802 Acquired
Feb. 20, 2015 WLK Employee Option (right to buy) Common Stock (6,007) $68.09 Feb. 20, 2025 6,007 Acquired
Feb. 14, 2014 WLK Restricted Stock Units Common Stock (837) · · 837 Acquired
Feb. 14, 2014 WLK Employee Option (right to buy) Common Stock (2,607) $127.96 Feb. 14, 2024 2,607 Acquired
May 28, 2013 WLK Employee Option (right to buy) Common Stock (1,263) $45.83 Feb. 18, 2021 1,263 Acquired
May 28, 2013 WLK Employee Option (right to buy) Common Stock (1,523) $60.10 Feb. 17, 2022 1,523 Acquired
May 28, 2013 WLK Employee Option (right to buy) Common Stock (2,893) $20.52 Feb. 26, 2020 2,893 Acquired
Feb. 15, 2013 WLK Restricted Stock Units Common Stock (1,119) · · 1,119 Acquired
Feb. 15, 2013 WLK Employee Option (right to buy) Common Stock (2,976) $91.40 Feb. 15, 2023 2,976 Acquired
Dec. 7, 2012 WLK Employee Option (right to buy) Common Stock (6,428) $14.24 Feb. 13, 2019 6,428 Acquired
Aug. 9, 2012 WLK Employee Option (right to buy) Common Stock (1,262) $45.83 Feb. 18, 2021 1,262 Acquired
Aug. 9, 2012 WLK Employee Option (right to buy) Common Stock (2,893) $20.52 Feb. 26, 2020 2,893 Acquired
Feb. 17, 2012 WLK Employee Option (right to buy) Common Stock (4,569) $60.10 Feb. 17, 2022 4,569 Acquired
March 15, 2011 WLK Employee Option (right to buy) (Common Stock) Common Stock (2,892) $20.52 Feb. 26, 2020 2,892 Acquired
March 15, 2011 WLK Employee Option (right to buy) Common Stock (6,427) $14.24 Feb. 13, 2019 6,427 Acquired
Feb. 18, 2011 WLK Employee Option (right to buy) Common Stock (3,788) $45.83 Feb. 18, 2021 3,788 Acquired
Aug. 16, 2010 WLK Employee Option (right to buy) Common Stock (6,427) $14.24 Feb. 13, 2019 6,427 Disposed
Feb. 26, 2010 WLK Employee Option (right to buy) Common Stock (8,678) $20.52 Feb. 26, 2020 8,678 Acquired
Feb. 13, 2009 WLK Employee Option (right to buy) Common Stock (19,282) $14.24 Feb. 13, 2019 19,282 Acquired

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

Initial ownership (Form 3) 1 holding

07

Securities held when first becoming an insider, per SEC Form 3.

DateTickerSecuritySharesOwnership
March 2, 2022 WLKP Common Units 22,000 Direct

Compensation (DEF 14A)

08

Matched by name from proxy statements (DEF 14A) — verify against the filing.

WLK

Fiscal yearSalaryBonusStock awards Option awardsNon-equity incentivePension changeOtherTotal
2009 $302,000 · · · $100,961 · $154,058 $768,437

Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.