Glass House Brands Inc. (GLASF)
Data as of , from SEC Form 4 filings.
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William Tu - OfficerOpen-market sale$31K- William Tu - OfficerOpen-market sale$106K
- William Tu - OfficerOpen-market sale$57K
- William Tu - OfficerOption exercise38,691 sh
- William Tu - OfficerTax withholding / forfeiture$109K
- William Tu - OfficerOption exercise38,691 sh
- William Tu - OfficerOption exercise5,800 sh
- William Tu - OfficerTax withholding / forfeiture$18K
About Glass House Brands Inc. (GLASF)
Glass House Brands Inc. files with the SEC under CIK 0001848731 and is classified as medicinal chemicals and botanical products. It is grouped with Health Care companies on this site.
GLASF Form 4 activity by transaction type, last 90 days
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Open-market sale | 1 | 3,818 | $31K |
| Option exercise | 4 | 88,982 | |
| Tax withholding / forfeiture | 2 | 15,540 |
Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.
GLASF insider transactions (Form 4)
155 Form 4 filings on record, the earliest from May 20, 2026, newest first.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| William Tu - Officer | Option exercise | Equity Shares | 38,691 | - footnote F3 | - | |
| William Tu - Officer | Tax withholding / forfeiture | Equity Shares | 13,523 | $8.08 footnote F4 | $109K | |
| William Tu - Officer | Option exercise | Restricted Stock Unit | 38,691 | $0.00 | - | |
| ||||||
| William Tu - Officer | Option exercise | Equity Shares | 5,800 | - footnote F3 | - | |
| William Tu - Officer | Tax withholding / forfeiture | Equity Shares | 2,017 | $9.00 footnote F4 | $18K | |
| William Tu - Officer | Open-market sale | Equity Shares | 3,818 footnote F5 | $8.03 | $31K | |
| William Tu - Officer | Option exercise | Restricted Stock Unit | 5,800 | $0.00 | - | |
| ||||||
| William Tu - Officer | Option exercise | Equity Shares | 5,800 | - footnote F3 | - | |
| William Tu - Officer | Tax withholding / forfeiture | Equity Shares | 1,982 | $11.37 footnote F4 | $23K | |
| William Tu - Officer | Option exercise | Restricted Stock Unit | 5,800 | $0.00 | - | |
| ||||||
| William Tu - Officer | Tax withholding / forfeiture | Equity Shares | 2,910 | $10.29 footnote F2 | $30K | |
| William Tu - Officer | Open-market sale | Equity Shares | 10,414 | $10.19 footnote F3 | $106K | |
| William Tu - Officer | Open-market sale | Equity Shares | 5,423 | $10.48 | $57K | |
| ||||||
| William Tu - Officer | Option exercise | Equity Shares | 8,333 | - footnote F3 | - | |
| William Tu - Officer | Option exercise | Restricted Stock Unit | 8,333 | $0.00 | - | |
| ||||||
Recent GLASF Form 144 notices of proposed sale
2An insider files Form 144 before selling restricted or control stock. It announces a planned sale. If the sale goes ahead, it shows up later on a Form 4.
| Filed | Filer | Relationship | Shares | Market value | Notice |
|---|---|---|---|---|---|
| Kyle Kazan | Chairman and CEO | 40,000 | $416K | View on EDGAR | |
| - | - | - | - | View on EDGAR |
GLASF insider trading FAQ
What is the latest insider trade for GLASF?
Glass House Brands Inc. (GLASF) had 2 insider filings in the last 90 days, with the most recent on 2026-09-18. The full record for GLASF runs to 5 Form 4 filings, the earliest from 2026-05-20. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying GLASF stock?
No insider purchases of GLASF were filed in the last 90 days.
How many insiders are selling GLASF stock?
1 insider sale of GLASF was filed in the last 90 days, totaling $31K.
Where can I see GLASF SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects GLASF Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
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Recent insider filings
5The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.
- - William Tu view on EDGAR
- - William Tu view on EDGAR
- - William Tu view on EDGAR
- - William Tu view on EDGAR
- - William Tu view on EDGAR
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Learn more
- Insider selling: signal or noise?
- Why most insider sales are routine, and the few patterns worth a second look.
- Form 144 vs Form 4
- A Form 144 announces a planned sale; the Form 4 reports it after it happens.
- Insider activity in Health Care
- Where GLASF's peers are being bought and sold.
- Every recent Form 4
- The market-wide feed, updated as filings arrive from SEC EDGAR.
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