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Sienna Resources Inc. is an exploration firm focused on discovering, acquiring, and developing mineral prospects across a wide geographical area including Canada, Sweden, Finland, Norway, and the United States. The company's primary objective is to uncover deposits rich in platinum, palladium, nickel, copper, cobalt, and lithium. Its portfolio of interests includes the Slättberg project in southern Sweden and the Kuusamo PGE-Ni-Cu-Co project in Finland. In North America, Sienna holds stakes in the Clayton Valley Deep Basin Lithium Brine project, the Marathon North Platinum-Palladium Property…

Engages driller for maiden drill program on the Esmeralda County Gold Project, NevadaSienna's first drill program of 2026, with strong

Vancouver, British Columbia--(Newsfile Corp. - June 16, 2026) - Sienna Resources Inc. (TSXV: SIEN) (OTCID: SNNAF) (WKN: A418KR) (the "Company" or "Sienna") wishes to announce that it has engaged Terraquest Ltd. of Ontario to conduct an airborne survey covering the Stonesthrow Copper-Gold Project in Saskatchewan.

Vancouver, British Columbia--(Newsfile Corp. - May 29, 2026) - Sienna Resources Inc. (TSXV: SIEN) (OTCID: SNNAF) (WKN: A418KR) (the

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.

Vancouver, British Columbia--(Newsfile Corp. - January 28, 2026) - Sienna Resources Inc. (TSXV: SIEN) (OTCID: SNNAF) (WKN: A418KR) (the "Company" or "Sienna") is pleased to announce that it has entered into a joint venture agreement ("JV") with Cruz Battery Metals Corp. ("Cruz") and Adelayde Exploration Inc. ("Adelayde") to explore the deep basin lithium brine potential in Clayton Valley, Nevada. The 115 mineral claims comprising the 2,300-acre JV land package are all located within, and completely surrounded by, SLB's (formerly Schlumberger) and Pure Energy Minerals' lithium deposit (see map below).