Catherine T. Chao
CIK 1974884 · View on SEC EDGAR ↗
Insider
First SEC filing: May 11, 2023 · Latest: May 11, 2023
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 11 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 |
|---|---|---|---|---|---|---|---|---|---|
| Aug. 14, 2026 | WLK | A | 2,184 | — | — | 2,184 Direct | — | Acquired | (price as of 2026-08-20) |
| Aug. 8, 2026 | WLK | M | 2,168 | — | — | 7,748 Direct | +38.85% | Acquired | (price as of 2026-08-20) |
| Aug. 8, 2026 | WLK | M | 2,168 | — | — | 2,168 Direct | -50.00% | Disposed | (price as of 2026-08-20) |
| Aug. 11, 2024 | WLK | M | 1,136 | — | — | 0 Direct | -100.00% | Disposed | (price as of 2026-08-20) |
| Aug. 11, 2024 | WLK | M | 1,136 | — | — | 4,452 Direct | +34.26% | Acquired | (price as of 2026-08-20) |
| Aug. 9, 2024 | WLK | A | 1,128 | — | — | 1,128 Direct | — | Acquired | (price as of 2026-08-20) |
| May 12, 2024 | WLK | M | 1,316 | — | — | 0 Direct | -100.00% | Disposed | (price as of 2026-08-20) |
| May 12, 2024 | WLK | M | 1,316 | — | — | 3,316 Direct | +65.80% | Acquired | (price as of 2026-08-20) |
| Aug. 31, 2023 | WLK | G | 19,423 | — | — | 19,423 Indirect | — | Acquired | (price as of 2026-08-20) |
| Aug. 11, 2023 | WLK | A | 1,136 | — | — | 1,136 Direct | — | Acquired | (price as of 2026-08-20) |
| May 12, 2023 | WLK | A | 1,316 | — | — | 1,316 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 |
|---|---|---|---|---|---|---|---|
| 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. 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 |
| May 12, 2024 | WLK | Restricted Stock Units | Common Stock (1,316) | — | — | 1,316 | Disposed |
| Aug. 11, 2023 | WLK | Restricted Stock Units | Common Stock (1,136) | — | — | 1,136 | Acquired |
| May 12, 2023 | WLK | Restricted Stock Units | Common Stock (1,316) | — | — | 1,316 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 2 holdings
Securities held when first becoming an insider, per SEC Form 3.