Glass House exec vests 38,691 RSUs, sells for tax

Glass House Brands Inc. (GLAS) reported that officer William Tu, SVP and Corporate Controller, settled a tranche of restricted stock units and related tax obligations on September 16, 2026.

Rhea-AI Filing Summary

Glass House Brands Inc. (GLAS) reported that officer William Tu, SVP and Corporate Controller, settled a tranche of restricted stock units and related tax obligations on September 16, 2026. An award of 38,691 RSUs vested and was converted into the same number of Equity Shares, with 13,523 Equity Shares delivered to cover tax withholding at a weighted average sale price of $8.08 per share in transactions between $8.00 and $8.16. Following the RSU conversion, Tu directly held 100,580 RSUs for Glass House Brands Equity Shares, and no Rule 10b5‑1 trading plan is reported.

Insider Trade Summary

38,691 shares exercised/converted

Exercise 3 txns

Insider Tu William

Role SVP, Corporate Controller

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Unit F3, F2, F1	38,691	$0.00	$0.00
Exercise	Equity Shares F1, F3	38,691	--	--
Tax Withholding	Equity Shares F1, F4	13,523	$8.08	$109K

Holdings After Transaction: Restricted Stock Unit — 100,580 contracts (Direct); Equity Shares — 28,951 shares (Direct)

Footnotes (4)

1. F1. The Subordinate Voting Shares, Restricted Voting Shares, and/or Limited Voting Shares of Glass House Brands Inc. ("GHBI") (collectively, the "Equity Shares").
2. F2. The Reporting Person was granted RSU awards covering 116,071 RSUs on February 1, 2025 (the "February RSUs"). An initial tranche of 38,691 of the February RSUs vested on September 16, 2026.
3. F3. Each RSU represents the right to receive, at settlement, one share of GHBI's Equity Shares.
4. F4. The Equity Shares were sold to satisfy the Reporting Person's tax withholding obligations. Represents the Equity Shares sold at a weighted average sale price of $8.08 per share. The Equity Shares were sold in multiple transactions at prices ranging from $8.00 to $8.16. The Reporting Person will provide, upon request by the staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, full information regarding the number of Equity Shares sold at each separate price.

Key Figures

RSUs vested and converted: 38,691 RSUs / shares RSUs in original February 2025 award: 116,071 RSUs Shares delivered for tax withholding: 13,523 Equity Shares +3 more

6 metrics

RSUs vested and converted 38,691 RSUs / shares Initial tranche of February 1, 2025 RSU award vested on September 16, 2026

RSUs in original February 2025 award 116,071 RSUs Grant to William Tu on February 1, 2025

Shares delivered for tax withholding 13,523 Equity Shares Delivered on September 16, 2026 to satisfy tax withholding obligations

Weighted average sale price $8.08 per share Equity Shares delivered for tax withholding, in trades from $8.00 to $8.16

Remaining RSUs after transaction 100,580 RSUs Directly held by William Tu after the September 16, 2026 RSU exercise

Shares used for tax-liability transactions 13,523 shares Code F disposition for payment of tax liability by delivering shares

Key Terms

Restricted Stock Unit, Equity Shares, weighted average sale price, tax withholding obligations

4 terms

Restricted Stock Unit financial

"The Reporting Person was granted RSU awards covering 116,071 RSUs"

A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.

Equity Shares financial

"The Subordinate Voting Shares, Restricted Voting Shares, and/or Limited Voting Shares"

Equity shares are units of ownership in a company that give the holder a claim on a portion of its assets and profits, like owning a slice of a business. They matter to investors because their value can rise or fall with the company’s performance and market sentiment, may provide periodic income through dividends, and often carry voting rights that influence how the business is run.

weighted average sale price financial

"Represents the Equity Shares sold at a weighted average sale price of $8.08"

tax withholding obligations financial

"The Equity Shares were sold to satisfy the Reporting Person's tax withholding obligations"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What RSU vesting did Glass House Brands (GLAS) disclose for William Tu?

Glass House Brands disclosed that 38,691 restricted stock units granted to William Tu vested on September 16, 2026 and were converted into an equal number of Equity Shares as part of his previously granted February 1, 2025 RSU award.

How many Glass House Brands (GLAS) shares were used to cover William Tu’s taxes?

The filing states that 13,523 Equity Shares of Glass House Brands were delivered to satisfy William Tu’s tax withholding obligations, at a weighted average sale price of $8.08 per share in transactions ranging from $8.00 to $8.16.

What shares does William Tu hold after this RSU transaction at GLAS?

After the reported RSU exercise and vesting, William Tu directly holds 100,580 restricted stock units representing Glass House Brands Equity Shares. This figure reflects his remaining RSU position reported following the September 16, 2026 transaction.

Was a Rule 10b5-1 trading plan used for William Tu’s GLAS transactions?

No. The Form 4 indicates that no Rule 10b5-1 trading plan was affirmed for these transactions involving RSU vesting and related share dispositions to cover tax withholding obligations.

What are the key dates related to William Tu’s GLAS RSU award?

William Tu received an RSU award covering 116,071 RSUs on February 1, 2025. An initial tranche of 38,691 of these RSUs vested on September 16, 2026, triggering the described equity settlement and tax-related share delivery.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/18/2026 - 04:05 PM Accepted by SEC EDGAR 09/18/2026 - 04:05 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Tu William

(Last) (First) (Middle)

3645 LONG BEACH BLVD

(Street)

LONG BEACH CALIFORNIA 90807

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Glass House Brands Inc. [ GLAS ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP, Corporate Controller

2a. Foreign Trading Symbol
[GLASS.AU]

3. Date of Earliest Transaction (Month/Day/Year)
09/16/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Equity Shares(1)	09/16/2026		M		38,691	A	(3)	42,474	D
Equity Shares(1)	09/16/2026		F		13,523	D	$8.08(4)	28,951	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Unit(3)	$0(3)	09/16/2026		M			38,691	(2)	(2)	Equity Shares(1)	38,691	$0	100,580	D

Explanation of Responses:

1. The Subordinate Voting Shares, Restricted Voting Shares, and/or Limited Voting Shares of Glass House Brands Inc. ("GHBI") (collectively, the "Equity Shares").

2. The Reporting Person was granted RSU awards covering 116,071 RSUs on February 1, 2025 (the "February RSUs"). An initial tranche of 38,691 of the February RSUs vested on September 16, 2026.

3. Each RSU represents the right to receive, at settlement, one share of GHBI's Equity Shares.

4. The Equity Shares were sold to satisfy the Reporting Person's tax withholding obligations. Represents the Equity Shares sold at a weighted average sale price of $8.08 per share. The Equity Shares were sold in multiple transactions at prices ranging from $8.00 to $8.16. The Reporting Person will provide, upon request by the staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, full information regarding the number of Equity Shares sold at each separate price.

	/s/ Benjamin Vega, Attorney-in-Fact for William Tu	09/18/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)