[Form 4] DIRTT ENVIRONMENTAL SOLUTIONS LTD Insider Trading Activity

Rhea-AI Filing Summary

Holly Hess Groos, a director of DIRTT Environmental Solutions Ltd. (DRTTF), was granted 45,975 deferred share units (DSUs) on 09/30/2025. Each DSU is economically equivalent to one common share and will settle following the reporting person’s cessation of service; for U.S. directors settlement will occur no later than 40 days after termination and may be paid in common shares or cash based on the closing price prior to the 30th day after separation. The DSUs were calculated using a Toronto Stock Exchange closing price of C$0.80 on 09/26/2025, converted at a Bank of Canada rate of C$1.3941 = US$1.00. After the grant, Ms. Groos beneficially owns 125,992 common shares (direct).

Positive

• 45,975 DSUs granted aligns director compensation with shareholder interests
• Full disclosure of valuation inputs (C$0.80 closing price and C$1.3941 exchange rate) enables transparency
• Reporting person beneficially owns 125,992 shares after the grant, showing significant insider stake

Negative

• None.

Insights

Corporate Governance Expert

Director compensation granted as DSUs: 45,975 units on 09/30/2025.

This filing documents a non-cash director award under the Issuer’s long-term incentive plan. DSUs align director pay with shareholder value because each unit represents the economic equivalent of one common share and settles after service ends.

The grant used a C$0.80 per-share basis (converted at C$1.3941 = US$1.00) to determine unit quantity; the reporting person now directly beneficially owns 125,992 common shares following the transaction.

Securities Compliance Specialist

Form 4 discloses a routine, time-based equity award to a director; no sale or purchase of underlying shares occurred at grant.

The transaction code reported is an award (DSU grant), and the Form 4 explains settlement timing and cash-or-share settlement mechanics for U.S. directors. All material calculation inputs (C$0.80 price and exchange rate 1.3941) are disclosed within the filing.

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

1. Name and Address of Reporting Person^*

Groos Holyce Hess

(Last) (First) (Middle)

7303 30 STREET SE

(Street)

CALGARY A0 T2C1N6

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
DIRTT ENVIRONMENTAL SOLUTIONS LTD [ DRTTF ]

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

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
09/30/2025

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

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

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

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

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
Deferred Share Unit	(1)	09/30/2025		A		45,975		(1)	(1)	Common Shares	45,975	$0.57(2)	125,992	D

Explanation of Responses:

1. Each deferred share unit ("DSU") was granted pursuant to the DIRTT Environmental Solutions Ltd. Third Amended and Restated Long Term Incentive Plan and is the economic equivalent of one common share (a "Common Share") of DIRTT Environmental Solutions Ltd. (the "Issuer"). All DSUs settle following the cessation of service and employment with the Issuer (the "Termination Date"). For directors who are subject to taxation in the United States ("US Directors"), the DSUs will settle no later than forty days following the Termination Date. Each DSU will be settled in one Common Share or in the cash equivalent of such Common Shares, calculated based on the closing price of the Common Shares on the day prior to the 30th day following separation from service for US Directors.

2. The price used to calculate the number of DSUs granted was C$0.80, which was the closing price Issuer's Common Shares as reported on the Toronto Stock Exchange on September 26, 2025. The price was converted using the Bank of Canada exchange rate for September 26, 2025 of C$1.3941 = US$1.00.

	/s/ Fareeha Khan, as attorney-in-fact Holly Hess Groos	10/02/2025
	** 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.

FAQ

What did DIRTT insider Holly Hess Groos report on Form 4 (DRTTF)?

The Form 4 reports a grant of 45,975 deferred share units (DSUs) to Holly Hess Groos on 09/30/2025 and shows 125,992 common shares beneficially owned following the grant.

When will the DSUs granted to the director settle?

DSUs settle following the reporting person’s cessation of service. For U.S. directors settlement will occur no later than 40 days after the Termination Date and may be in shares or cash based on a closing-price calculation.

What price was used to calculate the number of DSUs?

The calculation used the Issuer’s Toronto Stock Exchange closing price of C$0.80 on 09/26/2025, converted at the Bank of Canada rate of C$1.3941 = US$1.00.

Does the Form 4 show any sale of shares by the reporting person?

No. The Form 4 records a grant of DSUs (A code) and does not disclose any sale or disposition of underlying common shares on the reported date.