The Westaim Corporation — Proxy Solicitation & Information Statement 2025

Apr 3, 2025

April 03, 2025

Computershare

324-8th Avenue SW, 8th floor

Calgary AB, T2P 2Z2

www.computershare.com

To: All Canadian Securities Regulatory Authorities

Subject: THE WESTAIM CORPORATION

Dear Sir/Madam:

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

Meeting Type : Annual and Special Meeting
Record Date for Notice of Meeting : April 28, 2025
Record Date for Voting (if applicable) : April 28, 2025
Beneficial Ownership Determination Date : April 28, 2025
Meeting Date : June 12, 2025
Meeting Location (if available) : Toronto, ON
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 No
NAA for Registered Holders No

Voting Security Details:

Description	CUSIP Number	ISIN
COMMON SHARES	956925101	US9569251013

Sincerely,

Computershare

Agent for THE WESTAIM CORPORATION