Sienna Resources Inc. Announces a Flow-Through Private Placement

Vancouver, British Columbia--(Newsfile Corp. - March 12, 2026) - Sienna Resources Inc. (TSXV: SIEN) (FSE: A418KR), (the "Company" or "Sienna") is pleased to announce the completion of a non-brokered flow-through private placement (the "Financing") to raise $270,000 at a price of $0.15 per flow-through share (each, a "FT Share"). No warrants will be issued, and no finders' fees will be paid.