NYSE · CIK 0001848731
GLAS Glass House Brands Inc.
Insider trading from SEC Form 4. Last filing 25 d ago. Close $4.26 on Oct 9, 2026, 0% from the 52-week low and -69% from the high.
Glass House Brands Inc. (GLAS) has 6 SEC Form 4 filings on file from 1 insider, the latest filed on Sep 18, 2026. In the last 90 days insiders made 0 open-market buys worth $0 and 1 open-market sell worth $31k, net -$31k.
3 open-market trades have been scored at GLAS. The newest: William Tu (SVP, Corporate Controller) sold $31k of stock on Sep 11, 2026, filed Sep 11, 2026, scored 25 (weak). The largest of the 3 shown: William Tu (SVP, Corporate Controller) sold $163k on May 22, 2026, scored 46 (moderate).
GLAS closed at $4.26 on Oct 9, 2026, 0% above its 52-week low and 69% below its 52-week high.
5 Form 144 notices of planned sales are on file, the latest filed Nov 24, 2025.
Last 90 days
Price and insider trades, last year
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
Open-market buys and sells at Glass House Brands Inc., scored.
| Score | Insider | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 25Weak | William Tu SVP, Corporate Controller sell | $31k 3,818 shares | -50% | - | |
| 46Moderate | William Tu SVP, Corporate Controller sell | $163k 15,837 shares | -100% | +111% from low-4% from high | |
| 36Weak | William Tu SVP, Corporate Controller sell | $160k 15,888 shares | -46% | +113% from low-3% from high |
Planned sales
Form 144 notices filed before a sale of restricted or control stock, newest first. The sale itself usually reaches a Form 4 within days. All planned sales
| Filed | Seller | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| Nov 24, 2025 | Kyle Kazan Chairman and CEO | 55,000 0.07% of outstanding | $396k | Nov 17, 2025 | $388k |
| Aug 14, 2025 | Kyle Kazan Chairman and CEO | 53,400 0.07% of outstanding | $336k | Aug 15, 2025 | $410k |
| May 16, 2025 | Kyle Kazan Chairman and CEO | 80,000 0.11% of outstanding | $523k | May 16, 2025 | none |
| Nov 26, 2024 | Graham Farrar President and Director | 90,000 0.12% of outstanding | $665k | Dec 2, 2024 | $1.2M |
| Nov 26, 2024 | Kyle Kazan Chairman and CEO, 10% Stockholder | 100,000 0.13% of outstanding | $739k | Dec 2, 2024 | $3.0M |
Transactions
Every row filed, 16 in all.
| Date | Insider | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 16, 2026 | William Tu SVP, Corporate Controller | MOption exercise Equity Shares | +38,691 | - | - | 42,474 | 25 d ago |
| Sep 16, 2026 | William Tu SVP, Corporate Controller | FTax withholding Equity Shares | -13,523 | $8.08 | $109k | 28,951 | 25 d ago |
| Sep 16, 2026 | William Tu SVP, Corporate Controller | MOption exercise Restricted Stock Unitderivative | -38,691 | $0.00 | $0 | 100,580 | 25 d ago |
| Sep 1, 2026 | William Tu SVP, Corporate Controller | MOption exercise Equity Shares | +5,800 | - | - | 9,618 | 32 d ago |
| Sep 4, 2026 | William Tu SVP, Corporate Controller | FTax withholding Equity Shares | -2,017 | $9.00 | $18k | 7,601 | 32 d ago |
| Sep 11, 2026 | William Tu SVP, Corporate Controller | SOpen-market sale Equity Shares | -3,818 | $8.03 | $31k | 3,783 | 32 d ago |
| Sep 1, 2026 | William Tu SVP, Corporate Controller | MOption exercise Restricted Stock Unitderivative | -5,800 | $0.00 | $0 | 139,271 | 32 d ago |
| Jun 1, 2026 | William Tu SVP, Corporate Controller | MOption exercise Equity Shares | +5,800 | - | - | 5,800 | Jun 4, 2026 |
| Jun 3, 2026 | William Tu SVP, Corporate Controller | FTax withholding Equity Shares | -1,982 | $11.37 | $23k | 3,818 | Jun 4, 2026 |
| Jun 1, 2026 | William Tu SVP, Corporate Controller | MOption exercise Restricted Stock Unitderivative | -5,800 | $0.00 | $0 | 145,071 | Jun 4, 2026 |
| May 22, 2026 | William Tu SVP, Corporate Controller | FTax withholding Equity Shares | -2,910 | $10.29 | $30k | 15,837 | May 26, 2026 |
| May 22, 2026 | William Tu SVP, Corporate Controller | SOpen-market sale Equity Shares | -10,414 | $10.19 | $106k | 5,423 | May 26, 2026 |
| May 26, 2026 | William Tu SVP, Corporate Controller | SOpen-market sale Equity Shares | -5,423 | $10.48 | $57k | 0 | May 26, 2026 |
| May 19, 2026 | William Tu SVP, Corporate Controller | SOpen-market sale Equity Shares | -15,888 | $10.08 | $160k | 18,747 | May 20, 2026 |
| May 18, 2026 | William Tu SVP, Corporate Controller | MOption exercise Equity Shares | +8,333 | - | - | 34,635 | May 19, 2026 |
| May 18, 2026 | William Tu SVP, Corporate Controller | MOption exercise Restricted Stock Unitderivative | -8,333 | $0.00 | $0 | 150,871 | May 19, 2026 |
Questions about GLAS
Answered from the filings on this page, as of the latest one.
Are insiders buying GLAS?
As of Sep 18, 2026, SEC Form 4 filings show 0 open-market buys worth $0 by 0 insiders and 1 open-market sell worth $31k by 1 insider at Glass House Brands Inc. in the last 90 days, net -$31k. Only purchases (code P) and sales (code S) count; grants, option exercises and tax withholding do not.
Who was the last insider to trade GLAS on the open market?
William Tu (SVP, Corporate Controller) sold $31k of GLAS on Sep 11, 2026 and filed the Form 4 on Sep 11, 2026. InsiderTell scored 25 (weak).
How many insiders file Form 4 at Glass House Brands Inc.?
1 person has filed a Form 4 at Glass House Brands Inc., among them William Tu (SVP, Corporate Controller). Officers, directors and holders of more than 10% of a share class must report their trades within two business days.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.