Sec Form 4 Filing - Noll Shaun @ DIRTT ENVIRONMENTAL SOLUTIONS LTD - 2025-07-24

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

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, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Noll Shaun 2. Issuer Name and Ticker or Trading Symbol DIRTT ENVIRONMENTAL SOLUTIONS LTD [ DRTTF] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 7303 30 STREET SE 3. Date of Earliest Transaction (MM/DD/YY) 07/24/2025 (Street) CALGARY, A0T2C1N6 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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 Common Shares 07/24/2025 M 809,089 A 54,410,732 D Common Shares 07/24/2025 D 165,484 D $ 0.9 54,245,248 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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 7. Title and Amount of Underlying Securities (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 of Derivative Security: 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 ) 07/24/2025 M 809,089 07/24/2025 07/24/2025 Common Shares 809,089 ( 1 ) 0 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Noll Shaun 7303 30 STREET SE CALGARY, A0T2C1N6 X Signatures /s/ Fareeha Khan, as attorney-in-fact for Shaun Noll 07/25/2025 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The 643,605 deferred share units ("DSUs") granted pursuant to the DIRTT Environmental Solutions Ltd. Second Amended and Restated Long Term Incentive Plan or its predecessor plan were settled in common shares ("Common Shares") of DIRTT Environmental Solutions Ltd. (the "Issuer") on a one-for-one basis. The 165,484 DSUs granted pursuant to the Deferred Share Unit Plan for Non-Employee Directors were settled in cash equal to the closing price of one Common Share on July 23, 2025 for each DSU, as reported on the Toronto Stock Exchange.

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).

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