John Tsung-Chen Chao
CIK 1746472 · View on SEC EDGAR ↗
Insider
First SEC filing: Aug. 20, 2018 · Latest: Aug. 20, 2018
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 19 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. 20, 2026 | WLK | A | 2,434 | — | — | 2,434 Direct | — | Acquired | (price as of 2026-08-21) |
| Feb. 20, 2026 | WLK | A | 1,104 | — | — | 1,104 Direct | — | Acquired | (price as of 2026-08-21) |
| Feb. 20, 2026 | WLK | A | 4,044 | — | — | 4,044 Direct | — | Acquired | (price as of 2026-08-21) |
| Feb. 20, 2026 | WLK | F | 91 | $94.10 | $8,563 | 7,888 Direct | -1.14% | Disposed | -16.0% (price as of 2026-08-21) |
| Feb. 19, 2026 | WLK | A | 213 | — | — | 7,979 Direct | +2.74% | Acquired | (price as of 2026-08-21) |
| Feb. 18, 2026 | WLK | F | 242 | $98.95 | $23,946 | 7,766 Direct | -3.02% | Disposed | -20.1% (price as of 2026-08-21) |
| Feb. 17, 2026 | WLK | M | 570 | — | — | 0 Direct | -100.00% | Disposed | (price as of 2026-08-21) |
| Feb. 17, 2026 | WLK | M | 570 | — | — | 7,608 Direct | +8.10% | Acquired | (price as of 2026-08-21) |
| March 5, 2025 | WLK | F | 391 | $108.62 | $42,470 | 7,038 Direct | -5.26% | Disposed | -27.2% (price as of 2026-08-21) |
| March 5, 2025 | WLK | F | 235 | $108.62 | $25,526 | 7,429 Direct | -3.07% | Disposed | -27.2% (price as of 2026-08-21) |
| Feb. 21, 2025 | WLK | A | 919 | — | — | 919 Direct | — | Acquired | (price as of 2026-08-21) |
| Feb. 21, 2025 | WLK | A | 2,772 | — | — | 2,772 Direct | — | Acquired | (price as of 2026-08-21) |
| Feb. 20, 2025 | WLK | A | 955 | — | — | 7,664 Direct | +14.23% | Acquired | (price as of 2026-08-21) |
| Feb. 20, 2025 | WLK | A | 955 | — | — | 7,664 Direct | +14.23% | Acquired | (price as of 2026-08-21) |
| Feb. 18, 2025 | WLK | M | 513 | — | — | 6,709 Direct | +8.28% | Acquired | (price as of 2026-08-21) |
| Feb. 18, 2025 | WLK | M | 513 | — | — | 0 Direct | -100.00% | Disposed | (price as of 2026-08-21) |
| Feb. 18, 2025 | WLK | M | 513 | — | — | 6,709 Direct | +8.28% | Acquired | (price as of 2026-08-21) |
| Feb. 16, 2024 | WLK | A | 503 | — | — | 503 Direct | — | Acquired | (price as of 2026-08-21) |
| Feb. 16, 2024 | WLK | A | 1,394 | — | — | 1,394 Direct | — | Acquired | (price as of 2026-08-21) |
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. 20, 2026 | WLK | Restricted Stock Units | Common Stock (2,434) | — | — | 2,434 | Acquired |
| Feb. 20, 2026 | WLK | Restricted Stock Units | Common Stock (1,104) | — | — | 1,104 | Acquired |
| Feb. 20, 2026 | WLK | Employee Option (right to buy) | Common Stock (4,044) | $94.48 | Feb. 20, 2036 | 4,044 | Acquired |
| Feb. 17, 2026 | WLK | Restricted Stock Units | Common Stock (570) | — | — | 570 | Disposed |
| Feb. 21, 2025 | WLK | Restricted Stock Units | Common Stock (919) | — | — | 919 | Acquired |
| Feb. 21, 2025 | WLK | Employee Option (right to buy) | Common Stock (2,772) | $110.15 | Feb. 21, 2035 | 2,772 | Acquired |
| Feb. 18, 2025 | WLK | Restricted Stock Units | Common Stock (513) | — | — | 513 | Disposed |
| Feb. 16, 2024 | WLK | Restricted Stock Units | Common Stock (503) | — | — | 503 | Acquired |
| Feb. 16, 2024 | WLK | Employee Option (right to buy) | Common Stock (1,394) | $144.49 | Feb. 16, 2034 | 1,394 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 1 holding
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Aug. 20, 2018 | WLK | Common Stock | 92,010,554 | Indirect |