Standard Uranium Executes Letter of Intent to Option Rocas Uranium Project in Eastern Athabasca Basin

Vancouver, British Columbia--(Newsfile Corp. - September 18, 2025) - Standard Uranium Ltd. (TSXV: STND) (OTCQB: STTDF) (FSE: 9SU0) ("Standard Uranium" or the "Company") is pleased to announce that it has signed a letter of intent (the "LOI"), dated September 15, 2025, with Collective Metals Inc. (CSE: COMT) (the "Optionee"), an arms-length party. Pursuant to the LOI, the Optionee will be granted the option (the "Option") to acquire a seventy-five percent interest in the 4,002-hectare Rocas Project ("Rocas" or the "Project") located in the eastern Athabasca Basin region (Figure 1).

Rocas Project Highlights:

• Prime Location – More than 7.5 km of exploration strike length along a strong NE-SW magnetic low trend coincident with EM conductors and cross-cutting faults, providing shallow drill targets south of Key Lake.
• Uranium at Surface – Mineralized outcrop grab samples along approximately 900 metres of strike length, grading up to 0.50 wt.% U₃O₈ and never drill tested¹ (Figure 2).
• New Uranium Targets – Results from a high-resolution ground gravity survey completed in 2024 highlight potential alteration halos and high-priority exploration targets along well defined structural corridors.

The Option is exercisable by the Optionee completing cash payments and share issuances, and incurring the following exploration expenditures on the Project:

	Consideration  Payments	Consideration  Shares	Exploration Expenditures	Operator  Fees	Earn-in at completion of each Year
Year 1	$50,000	$250,000	$1,500,000	10%	0%
Year 2	$50,000	$250,000	$1,500,000	12%	0%
Year 3	$125,000	$225,000	$1,500,000	12%	75%
Total	$225,000	$725,000	$4,500,000