SIE Sienna Resources Inc

Sienna Resources Inc. (SIE—TSX.v) (A1XCQ0–FSE) (SNNAF—OTCBB) (May 25, 2020) (the “Company”) is pleased to announce it has acquired the Kuusamo battery metals project (the “Project”) which is comprised of two exploration “reservation” properties located adjacent to and near EMX Royal Corporation’s (EMX—NYSE) Kaukua platinum group elements (PGE) royalty property in Finland, which is being advanced by Palladium One Mining Inc. (PDM-TSX.v). The highly prospective Kuusamo project hosts similar styles of mineralization located within the same mafic intrusive complex and along trend of the mineralization at Kaukua. Both the Kuusamo and Kaukua properties show Ni-Cu-Co-PGE enriched sulfide horizons near the base of a mafic intrusive complex. Geologic maps of the area depicting this horizon show that it extends for nearly 30 kilometers along strike within the EMX reservation areas.

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Sienna and EMX have been working together to advance the Slättberg Ni-Cu-Co-PGE project in southern Sweden, a relationship that will now extend to Finland.

Jason Gigliotti, President of Sienna Resources stated, “We are very pleased to acquire this exciting PGE-Ni-Cu-Co project in Finland. This project is directly bordering Palladium One’s project that has produced impressive results to date. We are proud to say our partner is EMX, a NYSE listed mining company, who we believe is one of the most respected companies in the market with some of the best geologists. We have a great working relationship and look forward to developing this new project as well as the Slättberg project. Sienna will be very active this summer at a time when the mining market is generating robust upward momentum.”

Kuusamo Project Overview. Ni-Cu-Co-PGE mineralization on the Kuusamo property is hosted by the Koillismaa Layered Igneous Complex ("KLIC"), a 2.4-2.5 billion year old layered mafic intrusive complex located in north-central Finland. The KLIC forms part of an east-west trending belt of similar intrusions and nickel, copper and PGE deposits that cross through Finland and into Russia.

Ni-Cu-Co-PGE-enriched magmatic sulfide mineralization occurs near the base of the KLIC and has been mapped and drilled throughout the area. The Kuusamo Project covers substantial parts of the base of the KLIC and records show that at least five target areas have been drilled historically within the Kuusamo Project over the past 50 years, with most activity taking place in 1973, followed by drilling in 1997 and again from 2000-2005. However, almost all of the historic drilling was shallow, with most holes having reached depths of only 50-75 meters. Multiple phases of airborne and ground geophysical surveys have also been run across portions of the Project, with the data having been compiled by and acquired from the Geological Survey of Finland (GTK).

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EMX and Sienna will leverage this historic information and apply modern and updated geologic models to continue exploring the historic targets at deeper levels and to generate new targets on the Project.

Summary of Commercial Terms. Sienna can earn a 100% interest in the Kuusamo Project in Finland (the “Project”), subject to a 3% NSR royalty to EMX by:

• Issuing an additional 500,000 shares of SIE to EMX upon execution of the amendment agreement which is also subject to TSX Venture Exchange approval,
• Spending a minimum of C$250,000 on exploration and Project advancement over the next two years,
• Reimbursing EMX for its acquisition costs and expenses related to the Kuusamo project, and
• To exercise the option to acquire a 100% interest in the Project, Sienna will issue to EMX an additional 1,500,000 shares of SIE at the end of the two year option period which is also subject to TSX Venture Exchange approval.

If Sienna satisfies the conditions of the option agreement and elects to acquire the Project, EMX will receive annual advance royalty (“AAR”) payments of US$25,000 commencing on the first anniversary of the option exercise date, with each AAR payment increasing by US$5,000 per year until reaching a cap of US$75,000 per year.

Under certain conditions, 0.5% of the 3% NSR royalty retained by EMX can be repurchased.

Modifications to the Slättberg Option Terms. In addition to entering an option agreement for the Kuusamo project, EMX and Sienna have also modified the terms of the Slättberg Option Agreement. The original option period will be extended to October 31, 2020, subject to the following conditions:

• Sienna will conduct an additional C$250,000 in exploration on the Slättberg project before October 31, 2020; and
• To exercise the option to acquire a 100% interest in the Slättberg project, Sienna will issue to EMX an additional 1,500,000 shares of Sienna stock (reduced from the 3,000,000 shares specified in the original agreement) which is also subject to TSX Venture Exchange approval.

If Sienna satisfies the conditions of the modified option agreement and elects to acquire the Slättberg project, EMX will receive annual advance royalty (“AAR”) payments of US$25,000 commencing on the first anniversary of the option exercise date, with each AAR payment increasing by US$5,000 per year until reaching a cap of US$75,000 per year.

EMX will retain a 3% NSR royalty on the Slättberg project, 0.5% of which may be repurchased under certain conditions.

Management cautions that past results or discoveries on properties in proximity to Sienna may not necessarily be indicative to the presence of mineralization on the Company's properties. The technical contents of this release were approved by Greg Thomson, PGeo, a qualified person as defined by National Instrument 43-101.

About Sienna Resources

Sienna Resources Inc. is focused on exploring for and developing high-grade deposits in politically stable, environmentally responsible and ethical mining jurisdictions. Sienna’s current projects include the Flagship Platinum-Palladium-Nickel Slättberg Project in Southern Sweden on which Sienna is partnered with an NYSE listed mining company. Sienna’s Marathon North Platinum-Palladium Property is located in Northern Ontario directly bordering Generation Mining Ltd.’s (CSE: GENM) 7.1-million-ounce palladium-equivalent Marathon Deposit. Sienna also has the Clayton Valley Deep Basin Lithium Project in Nevada, home to the only lithium brine basin in production in North America, in the direct vicinity of Albemarle Corp’s (NYSE: ALB) Silver Peak deposit and Tesla Motors Inc.’s (Nasdaq: TSLA) Gigafactory.

If you would like to be added to Sienna’s email list please email info@siennaresources.com for information or join our twitter account at @SiennaResources.

Contact Information Tel:  1.604.646.6900Fax: 1.604.689.1733www.siennaresources.cominfo@siennaresources.com

“Jason Gigliotti”President, DirectorSienna Resources Inc.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this press release.