DIRTT Environmental Solutions Ltd. — Proxy Solicitation & Information Statement 2025

Mar 27, 2025

Date: March 27, 2025

Computershare

324-8th Avenue SW, 8th floor

Calgary AB, T2P 2Z2

www.computershare.com

To: All Canadian Securities Regulatory Authorities

Subject: DIRTT ENVIRONMENTAL SOLUTIONS LTD.

Dear Sir/Madam:

We advise of the following with respect to the upcoming Meeting of Security Holders for the subject Issuer:

Meeting Type : Annual General and Special Meeting
Record Date for Notice of Meeting : April 21, 2025
Record Date for Voting (if applicable) : April 21, 2025
Beneficial Ownership Determination Date : April 21, 2025
Meeting Date : June 03, 2025
Meeting Location (if available) : Virtual Meeting
Issuer sending proxy related materials directly to NOBO: No
Issuer paying for delivery to OBO: Yes

Notice and Access (NAA) Requirements:

NAA for Beneficial Holders : Yes
Beneficial Holders Stratification Criteria: Not Applicable
NAA for Registered Holders : Yes
Registered Holders Stratification Criteria: Not Applicable

Voting Security Details:

Description	CUSIP Number	ISIN
COMMON SHARES	25490H106	CA25490H1064

Sincerely,

Computershare

Agent for DIRTT ENVIRONMENTAL SOLUTIONS LTD.