William Tu - 18 Mar 2026 Form 3 Insider Report for Glass House Brands Inc. (GLASF)

Role: SVP, Corporate Controller
Signature: /s/ Benjamin Vega, Attorney-in-Fact for William Tu
Issuer symbol: GLASF
Transactions as of: 18 Mar 2026
Net transactions value: $0
Form type: 3
Filing time: 18 Mar 2026, 16:05:54 UTC
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Tu William	SVP, Corporate Controller	3645 LONG BEACH BLVD, LONG BEACH, UNITED STATES	/s/ Benjamin Vega, Attorney-in-Fact for William Tu	18 Mar 2026	0002120766

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
holding	GLASF	Equity Shares						26,302	18 Mar 2026	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
holding	GLASF	Restricted Stock Unit							18 Mar 2026	Equity Shares	159,204		Direct	F1, F2, F3

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The Subordinate Voting Shares, Restricted Voting Shares, and/or Limited Voting Shares of Glass House Brands Inc. ("GHBI") (collectively, the "Equity Shares").
F2	The reporting person was granted RSU awards covering 8,333 RSUs on July 12, 2023 (the "July RSUs"), 34,800 RSUs on September 1, 2024 (the "September RSUs"), and 116,071 RSUs on February 1, 2025 (the "February RSUs"), for an aggregate of 159,204 RSUs. The July RSUs vest on May 18, 2026. The September RSUs vest in six equal quarterly installments of 5,800 RSUs on June 1, 2026; September 1, 2026; December 1, 2026; March 1, 2027; June 1, 2027; and September 1, 2027, subject to the terms of the applicable award agreement. The February RSUs vest in nine quarterly installments, with an initial tranche of 38,691 RSUs vesting on September 16, 2026, and the remaining 77,380 RSUs vesting in eight substantially equal quarterly installments of 9,672 or 9,673 RSUs on December 16, 2026; March 16, 2027; June 16, 2027; September 16, 2027; December 16, 2027; March 16, 2028; June 16, 2028; and September 16, 2028, in each case subject to the terms and conditions of the applicable award agreement.
F3	Each RSU represents the right to receive, at settlement, one share of GHBI's Equity Shares.

Remarks:

Exhibit 24 - Power of Attorney