William Tu
CIK 2120766 · View on SEC EDGAR ↗
Insider
First SEC filing: March 18, 2026 · Latest: June 4, 2026
On this page
Insider at
Insider transactions
0 buys (P)
3 sells (S)
Net:
$-323,103
+ 6 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
6 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| May 26, 2026 | GLAS | S | 5,423 | $10.48 | $56,833 | 0 Direct | -100.00% | Disposed | -11.0% (price as of 2026-08-19) |
| May 22, 2026 | GLAS | S | 10,414 | $10.19 | $106,119 | 5,423 Direct | -65.76% | Disposed | -8.4% (price as of 2026-08-19) |
| May 19, 2026 | GLAS | S | 15,888 | $10.08 | $160,151 | 18,747 Direct | -45.87% | Disposed | -7.4% (price as of 2026-08-19) |
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 |
|---|---|---|---|---|---|---|---|
| June 1, 2026 | GLAS | Restricted Stock Unit [F3] | Equity Shares [F1] (5,800) | — | — | 5,800 | Disposed |
| May 18, 2026 | GLAS | Restricted Stock Unit | Equity Shares (8,333) | — | — | 8,333 | Disposed |
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.