Insider at

04

Insider transactions

05
0 buys (P) 0 sells (S) Net: $0 + 59 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

No open-market trades on record; showing all filings.

DateTickerCodeSharesPriceValue Owned afterΔ ownA/Dvs now
Aug. 14, 2026 WLK A 2,184 · · 2,184 Direct · Acquired (price as of 2026-10-02)
Aug. 8, 2026 WLK M 2,168 · · 23,310 Direct +10.25% Acquired (price as of 2026-10-02)
Aug. 8, 2026 WLK M 2,168 · · 2,168 Direct -50.00% Disposed (price as of 2026-10-02)
Aug. 9, 2025 WLK M 1,128 · · 21,142 Direct +5.64% Acquired (price as of 2026-10-02)
Aug. 9, 2025 WLK M 1,128 · · 0 Direct -100.00% Disposed (price as of 2026-10-02)
Aug. 8, 2025 WLK A 2,168 · · 2,168 Direct · Acquired (price as of 2026-10-02)
Aug. 11, 2024 WLK M 1,136 · · 0 Direct -100.00% Disposed (price as of 2026-10-02)
Aug. 11, 2024 WLK M 1,136 · · 20,014 Direct +6.02% Acquired (price as of 2026-10-02)
Aug. 9, 2024 WLK A 1,128 · · 1,128 Direct · Acquired (price as of 2026-10-02)
Aug. 12, 2023 WLK M 1,446 · · 0 Direct -100.00% Disposed (price as of 2026-10-02)
Aug. 12, 2023 WLK M 1,446 · · 18,878 Direct +8.30% Acquired (price as of 2026-10-02)
Aug. 11, 2023 WLK A 1,136 · · 1,136 Direct · Acquired (price as of 2026-10-02)
Aug. 13, 2022 WLK M 1,763 · · 17,432 Direct +11.25% Acquired (price as of 2026-10-02)
Aug. 13, 2022 WLK M 1,763 · · 0 Direct -100.00% Disposed (price as of 2026-10-02)
Aug. 12, 2022 WLK A 1,446 · · 1,446 Direct · Acquired (price as of 2026-10-02)
Aug. 14, 2021 WLK M 2,400 · · 15,669 Direct +18.09% Acquired (price as of 2026-10-02)
Aug. 14, 2021 WLK M 2,400 · · 0 Direct -100.00% Disposed (price as of 2026-10-02)
Aug. 13, 2021 WLK A 1,763 · · 1,763 Direct · Acquired (price as of 2026-10-02)
Aug. 16, 2020 WLK M 2,387 · · 13,269 Direct +21.94% Acquired (price as of 2026-10-02)
Aug. 16, 2020 WLK M 2,387 · · 0 Direct -100.00% Disposed (price as of 2026-10-02)
Aug. 14, 2020 WLK A 2,400 · · 2,400 Direct · Acquired (price as of 2026-10-02)
Aug. 17, 2019 WLK M 1,003 · · 9,473 Direct +11.84% Acquired (price as of 2026-10-02)
Aug. 17, 2019 WLK M 1,409 · · 10,882 Direct +14.87% Acquired (price as of 2026-10-02)
Aug. 17, 2019 WLK M 1,003 · · 0 Direct -100.00% Disposed (price as of 2026-10-02)
Aug. 17, 2019 WLK M 1,409 · · 0 Direct -100.00% Disposed (price as of 2026-10-02)
Aug. 16, 2019 WLK A 2,387 · · 2,387 Direct · Acquired (price as of 2026-10-02)
May 18, 2019 WLK M 103 · · 8,470 Direct +1.23% Acquired (price as of 2026-10-02)
May 18, 2019 WLK M 103 · · 0 Direct -100.00% Disposed (price as of 2026-10-02)
Aug. 21, 2018 WLK M 603 · · 8,367 Direct +7.77% Acquired (price as of 2026-10-02)
Aug. 21, 2018 WLK M 603 · · 0 Direct · Acquired (price as of 2026-10-02)
Aug. 18, 2018 WLK M 1,721 · · 7,764 Direct +28.48% Acquired (price as of 2026-10-02)
Aug. 18, 2018 WLK M 1,721 · · 0 Direct -100.00% Disposed (price as of 2026-10-02)
Aug. 17, 2018 WLK M 1,003 · · 6,043 Direct +19.90% Acquired (price as of 2026-10-02)
Aug. 17, 2018 WLK M 1,003 · · 1,003 Direct -50.00% Disposed (price as of 2026-10-02)
Aug. 17, 2018 WLK A 1,409 · · 1,409 Direct · Acquired (price as of 2026-10-02)
May 18, 2018 WLK A 103 · · 103 Direct · Acquired (price as of 2026-10-02)
Aug. 22, 2017 WLK M 357 · · 0 Direct -100.00% Disposed (price as of 2026-10-02)
Aug. 22, 2017 WLK M 357 · · 5,040 Direct +7.62% Acquired (price as of 2026-10-02)
Aug. 21, 2017 WLK M 603 · · 603 Direct -50.00% Disposed (price as of 2026-10-02)
Aug. 21, 2017 WLK M 603 · · 4,683 Direct +14.78% Acquired (price as of 2026-10-02)
Aug. 18, 2017 WLK A 1,721 · · 1,721 Direct · Acquired (price as of 2026-10-02)
Aug. 17, 2017 WLK M 1,003 · · 2,006 Direct -33.33% Disposed (price as of 2026-10-02)
Aug. 17, 2017 WLK M 1,003 · · 4,080 Direct +32.60% Acquired (price as of 2026-10-02)
Aug. 23, 2016 WLK M 588 · · 0 Direct -100.00% Disposed (price as of 2026-10-02)
Aug. 23, 2016 WLK M 588 · · 3,077 Direct +23.62% Acquired (price as of 2026-10-02)
Aug. 22, 2016 WLK M 357 · · 357 Direct -50.00% Disposed (price as of 2026-10-02)
Aug. 22, 2016 WLK M 603 · · 1,206 Direct -33.33% Disposed (price as of 2026-10-02)
Aug. 22, 2016 WLK M 603 · · 2,132 Direct +39.44% Acquired (price as of 2026-10-02)
Aug. 22, 2016 WLK M 357 · · 2,489 Direct +16.74% Acquired (price as of 2026-10-02)
Aug. 17, 2016 WLK A 3,009 · · 3,009 Direct · Acquired (price as of 2026-10-02)
Aug. 23, 2015 WLK M 586 · · 588 Direct -49.91% Disposed (price as of 2026-10-02)
Aug. 23, 2015 WLK M 586 · · 1,529 Direct +62.14% Acquired (price as of 2026-10-02)
Aug. 22, 2015 WLK M 357 · · 714 Direct -33.33% Disposed (price as of 2026-10-02)
Aug. 22, 2015 WLK M 357 · · 943 Direct +60.92% Acquired (price as of 2026-10-02)
Aug. 21, 2015 WLK A 1,809 · · 1,809 Direct · Acquired (price as of 2026-10-02)
Aug. 23, 2014 WLK M 586 · · 1,174 Direct -33.30% Disposed (price as of 2026-10-02)
Aug. 23, 2014 WLK M 586 · · 586 Direct · Acquired (price as of 2026-10-02)
Aug. 22, 2014 WLK A 1,071 · · 1,071 Direct · Acquired (price as of 2026-10-02)
Aug. 23, 2013 WLK A 880 · · 880 Direct · Acquired (price as of 2026-10-02)

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. 14, 2026 WLK Restricted Stock Units Common Stock (2,184) · · 2,184 Acquired
Aug. 8, 2026 WLK Restricted Stock Units Common Stock (2,168) · · 2,168 Disposed
Aug. 9, 2025 WLK Restricted Stock Units Common Stock (1,128) · · 1,128 Disposed
Aug. 8, 2025 WLK Restricted Stock Units Common Stock (2,168) · · 2,168 Acquired
Aug. 11, 2024 WLK Restricted Stock Units Common Stock (1,136) · · 1,136 Disposed
Aug. 9, 2024 WLK Restricted Stock Units Common Stock (1,128) · · 1,128 Acquired
Aug. 12, 2023 WLK Restricted Stock Units Common Stock (1,446) · · 1,446 Disposed
Aug. 11, 2023 WLK Restricted Stock Units Common Stock (1,136) · · 1,136 Acquired
Aug. 13, 2022 WLK Restricted Stock Units Common Stock (1,763) · · 1,763 Disposed
Aug. 12, 2022 WLK Restricted Stock Units Common Stock (1,446) · · 1,446 Acquired
Aug. 14, 2021 WLK Restricted Stock Units Common Stock (2,400) · · 2,400 Disposed
Aug. 13, 2021 WLK Restricted Stock Units Common Stock (1,763) · · 1,763 Acquired
Aug. 16, 2020 WLK Restricted Stock Units Common Stock (2,387) · · 2,387 Disposed
Aug. 14, 2020 WLK Restricted Stock Units Common Stock (2,400) · · 2,400 Acquired
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
May 18, 2019 WLK Restricted Stock Units Common Stock (103) · · 103 Disposed
Aug. 21, 2018 WLK Restricted Stock Units Common Stock (603) · · 603 Acquired
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
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. 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. 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. 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. 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. 23, 2013 WLK Restricted Stock Units Common Stock (880) · · 880 Acquired

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