SA · Seabridge Gold Inc.

This filing serves as formal notice of a Special Meeting of Security Holders for Seabridge Gold Inc., scheduled for May 22, 2026 in Toronto, Ontario. The March 30, 2026 record date establishes who is entitled to vote, applying uniformly to both registered and beneficial holders for notice and voting purposes. While the document confirms the meeting type and logistics, it does not disclose the specific proposals to be voted upon — those details would reside in the accompanying proxy statement, not included here. The issuer’s election to pay for delivery of proxy materials to Objecting Beneficial Owners (OBOs) signals standard compliance with SEC and Canadian regulatory requirements for distribution of soliciting materials. Because no voting items, outcomes, or substantive corporate actions (e.g., mergers, equity issuances, executive elections) are disclosed in this notice, the materiality is assessed as MEDIUM: it is procedurally significant for shareholders’ rights and timing awareness, but lacks standalone financial, strategic, or governance impact without further context from the proxy statement.