Thomas J. Janssens
CIK 1834230 · View on SEC EDGAR ↗
Insider
First SEC filing: March 15, 2022 · Latest: March 15, 2022
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 33 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.
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Feb. 21, 2025 | WLK | A | 1,946 | — | — | 1,946 Direct | — | Acquired | (price as of 2026-08-20) |
| Feb. 21, 2025 | WLK | A | 5,871 | — | — | 5,871 Direct | — | Acquired | (price as of 2026-08-20) |
| Feb. 21, 2025 | WLK | F | 606 | $110.54 | $66,987 | 17,127 Direct | -3.42% | Disposed | -28.6% (price as of 2026-08-20) |
| Feb. 20, 2025 | WLK | A | 2,444 | — | — | 17,733 Direct | +15.99% | Acquired | (price as of 2026-08-20) |
| Feb. 19, 2025 | WLK | F | 14 | $112.53 | $1,575 | 15,289 Direct | -0.09% | Disposed | -29.8% (price as of 2026-08-20) |
| Feb. 19, 2025 | WLK | F | 322 | $111.46 | $35,890 | 15,303 Direct | -2.06% | Disposed | -29.2% (price as of 2026-08-20) |
| Feb. 18, 2025 | WLK | M | 1,313 | — | — | 0 Direct | -100.00% | Disposed | (price as of 2026-08-20) |
| Feb. 18, 2025 | WLK | M | 1,313 | — | — | 15,625 Direct | +9.17% | Acquired | (price as of 2026-08-20) |
| Feb. 18, 2025 | WLK | F | 790 | $115.29 | $91,079 | 14,312 Direct | -5.23% | Disposed | -31.5% (price as of 2026-08-20) |
| Feb. 14, 2025 | WLK | M | 3,039 | — | — | 0 Direct | -100.00% | Disposed | (price as of 2026-08-20) |
| Feb. 14, 2025 | WLK | M | 3,039 | — | — | 15,102 Direct | +25.19% | Acquired | (price as of 2026-08-20) |
| Aug. 23, 2024 | WLK | M | 4,020 | — | — | 0 Direct | -100.00% | Disposed | (price as of 2026-08-20) |
| Aug. 23, 2024 | WLK | M | 6,507 | — | — | 0 Direct | -100.00% | Disposed | (price as of 2026-08-20) |
| Aug. 23, 2024 | WLK | M | 4,337 | — | — | 0 Direct | -100.00% | Disposed | (price as of 2026-08-20) |
| Aug. 23, 2024 | WLK | D | 14,864 | $149.48 | $2,221,871 | 12,063 Direct | -55.20% | Disposed | -47.2% (price as of 2026-08-20) |
| Aug. 23, 2024 | WLK | M | 4,020 | $86.54 | $347,891 | 26,927 Direct | +17.55% | Acquired | -8.8% (price as of 2026-08-20) |
| Aug. 23, 2024 | WLK | M | 6,507 | $65.81 | $428,226 | 22,907 Direct | +39.68% | Acquired | 20.0% (price as of 2026-08-20) |
| Aug. 23, 2024 | WLK | M | 4,337 | $79.83 | $346,223 | 16,400 Direct | +35.95% | Acquired | -1.1% (price as of 2026-08-20) |
| Feb. 20, 2024 | WLK | F | 88 | $138.65 | $12,201 | 12,063 Direct | -0.72% | Disposed | -43.1% (price as of 2026-08-20) |
| Feb. 20, 2024 | WLK | F | 896 | $129.92 | $116,408 | 12,151 Direct | -6.87% | Disposed | -39.2% (price as of 2026-08-20) |
| Feb. 19, 2024 | WLK | M | 1,170 | — | — | 0 Direct | -100.00% | Disposed | (price as of 2026-08-20) |
| Feb. 19, 2024 | WLK | M | 1,170 | — | — | 13,047 Direct | +9.85% | Acquired | (price as of 2026-08-20) |
| Feb. 16, 2024 | WLK | A | 2,346 | — | — | 11,877 Direct | +24.61% | Acquired | (price as of 2026-08-20) |
| Feb. 16, 2024 | WLK | A | 1,440 | — | — | 1,440 Direct | — | Acquired | (price as of 2026-08-20) |
| Feb. 16, 2024 | WLK | A | 3,988 | — | — | 3,988 Direct | — | Acquired | (price as of 2026-08-20) |
| Feb. 16, 2024 | WLK | A | 3,073 | — | — | 3,073 Direct | — | Acquired | (price as of 2026-08-20) |
| Feb. 16, 2024 | WLK | A | 8,509 | — | — | 8,509 Direct | — | Acquired | (price as of 2026-08-20) |
| Aug. 29, 2023 | WLK | M | 1,370 | — | — | 2,782 Direct | +97.03% | Acquired | (price as of 2026-08-20) |
| Aug. 29, 2023 | WLK | M | 2,485 | — | — | 0 Direct | — | Acquired | (price as of 2026-08-20) |
| Aug. 29, 2023 | WLK | D | 3,855 | $133.87 | $516,069 | 9,531 Direct | -28.80% | Disposed | -41.0% (price as of 2026-08-20) |
| Aug. 29, 2023 | WLK | M | 1,370 | $108.12 | $148,124 | 13,386 Direct | +11.40% | Acquired | -27.0% (price as of 2026-08-20) |
| Aug. 29, 2023 | WLK | M | 2,485 | $107.75 | $267,759 | 12,016 Direct | +26.07% | Acquired | -26.7% (price as of 2026-08-20) |
| May 12, 2023 | WLK | A | 13,164 | — | — | 13,164 Direct | — | Acquired | (price as of 2026-08-20) |
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.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| Feb. 21, 2025 | WLK | Restricted Stock Units | Common Stock (1,946) | — | — | 1,946 | Acquired |
| Feb. 21, 2025 | WLK | Employee Option (right to buy) | Common Stock (5,871) | $110.15 | Feb. 21, 2035 | 5,871 | Acquired |
| Feb. 18, 2025 | WLK | Restricted Stock Units | Common Stock (1,313) | — | — | 1,313 | Disposed |
| Feb. 14, 2025 | WLK | Restricted Stock Units | Common Stock (3,039) | — | — | 3,039 | Disposed |
| Aug. 23, 2024 | WLK | Employee Option (right to buy) | Common Stock (4,020) | $86.54 | Feb. 19, 2031 | 4,020 | Disposed |
| Aug. 23, 2024 | WLK | Employee Option (right to buy) | Common Stock (6,507) | $65.81 | Feb. 14, 2030 | 6,507 | Disposed |
| Aug. 23, 2024 | WLK | Employee Option (right to buy) | Common Stock (4,337) | $79.83 | Feb. 15, 2029 | 4,337 | Disposed |
| Feb. 19, 2024 | WLK | Restricted Stock Units | Common Stock (1,170) | — | — | 1,170 | Disposed |
| Feb. 16, 2024 | WLK | Restricted Stock Units | Common Stock (1,440) | — | — | 1,440 | Acquired |
| Feb. 16, 2024 | WLK | Employee Option (right to buy) | Common Stock (3,988) | $144.49 | Feb. 16, 2034 | 3,988 | Acquired |
| Feb. 16, 2024 | WLK | Restricted Stock Units | Common Stock (3,073) | — | — | 3,073 | Acquired |
| Feb. 16, 2024 | WLK | Employee Option (right to buy) | Common Stock (8,509) | $144.49 | Feb. 16, 2034 | 8,509 | Acquired |
| Aug. 29, 2023 | WLK | Employee Option (right to buy) | Common Stock (1,370) | $108.12 | Feb. 18, 2032 | 1,370 | Acquired |
| Aug. 29, 2023 | WLK | Employee Option (right to buy) | Common Stock (2,485) | $107.75 | Feb. 16, 2028 | 2,485 | Acquired |
| May 12, 2023 | WLK | Restricted Stock Units | Common Stock (13,164) | — | — | 13,164 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 20 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| March 15, 2022 | WLK | Common Stock | 6,765 | Direct |
| March 15, 2022 | WLK | Restricted Stock Units→ Common Stock (1,538) | 1,538 | Direct |
| March 15, 2022 | WLK | Restricted Stock Units→ Common Stock (3,039) | 3,039 | Direct |
| March 15, 2022 | WLK | Restricted Stock Units→ Common Stock (1,170) | 1,170 | Direct |
| March 15, 2022 | WLK | Restricted Stock Units→ Common Stock (1,313) | 1,313 | Direct |
| March 15, 2022 | WLK | Employee Option (right to buy)→ Common Stock (2,485) | 2,485 | Direct |
| March 15, 2022 | WLK | Employee Option (right to buy)→ Common Stock (4,337) | 4,337 | Direct |
| March 15, 2022 | WLK | Employee Option (right to buy)→ Common Stock (6,507) | 6,507 | Direct |
| March 15, 2022 | WLK | Employee Option (right to buy)→ Common Stock (4,020) | 4,020 | Direct |
| March 15, 2022 | WLK | Employee Option (right to buy)→ Common Stock (4,152) | 4,152 | Direct |
| March 2, 2022 | WLK | Common Stock | 6,766 | Direct |
| March 2, 2022 | WLK | Restricted Stock Units→ Common Stock (1,538) | 1,538 | Direct |
| March 2, 2022 | WLK | Restricted Stock Units→ Common Stock (3,039) | 3,039 | Direct |
| March 2, 2022 | WLK | Restricted Stock Units→ Common Stock (1,170) | 1,170 | Direct |
| March 2, 2022 | WLK | Restricted Stock Units→ Common Stock (1,313) | 1,313 | Direct |
| March 2, 2022 | WLK | Employee Option (right to buy)→ Common Stock (2,485) | 2,485 | Direct |
| March 2, 2022 | WLK | Employee Option (right to buy)→ Common Stock (4,337) | 4,337 | Direct |
| March 2, 2022 | WLK | Employee Option (right to buy)→ Common Stock (6,507) | 6,507 | Direct |
| March 2, 2022 | WLK | Employee Option (right to buy)→ Common Stock (4,020) | 4,020 | Direct |
| March 2, 2022 | WLK | Employee Option (right to buy)→ Common Stock (4,152) | 4,152 | Direct |