Talisker Resources — Proxy Solicitation & Information Statement 2025

Nov 14, 2025

ENDEAVOR TRUST

ENDEAVOR TRUST CORPORATION

702 – 777 Hornby Street

Vancouver, BC, V6Z 1S4

admin@EndeavorTrust.com

www.EndeavorTrust.com

Guyana Goldstrike Inc.

Via SEDAR+

November 14, 2025

TO ALL APPLICABLE REGULATORS AND EXCHANGES

RE: Guyana Goldstrike Inc.
(the "Issuer")
Notice of Meeting and Record Dates

We advise the following with respect to the Issuer's upcoming Meeting of Security Holders:

1	Meeting Type	Annual General Meeting
2	Record Date for Notice of Meeting	December 9, 2025
3	Record Date for Voting (If Applicable)	December 9, 2025
4	Beneficial Ownership Determination Date	December 9, 2025
5	Meeting Date	January 13, 2026
6	Meeting Location	TBA
7	Voting Securities Details
8	Description (Class)	Common
9	ISIN / CUSIP	CA40356P2098 / 40356P209
10	Issuer sending proxy related materials directly to Non-Objecting Beneficial Owners (NOBOs)	Yes
11	Issuer paying for mailing to Objecting Beneficial Owners (OBOs)	No
12	Notice and Access
	Beneficial Holders	No
	Registered Holders	No
	Stratification Level	Not Applicable
13	Material Selection	A - All

Regards,

Endeavor Trust Corporation

Agent for Guyana Goldstrike Inc.