Solitario Resources Corp.

Item 1.01 Entry Into a Material Definitive Agreement Effective June 18, 2025, Solitario Resources Corp. (the “Company”) and Newmont Overseas Exploration Ltd (“Newmont”), a wholly owned subsidiary of Newmont Corporation closed upon the purchase and sale of 1,587,300 shares of Company common stock for $999,999. This represented a follow-on investment by Newmont, and through this transaction Newmont increased its ownership in the Company to an approximate 9.4% interest. The purchase and sale of the shares was effected in accordance with a Stock Purchase Agreement (“SPA”) between the parties. The Company made certain customary representations, warranties, and covenants in the SPA. The SPA is not intended to provide any other factual information about the Company. In addition, in the SPA, Newmont made various representations and warranties, including that Newmont purchased the shares for its own account and that Newmont is an accredited investor. The representations, warranties, and covenants contained in the SPA were made only for purposes of the SPA including the allocation of risk between the parties thereto, and as of specific dates, were solely for the benefit of the parties to the SPA, and may be subject to limitations agreed upon by the parties thereto. As previously disclosed, in July 2023 the Company and Newmont entered into an Investor Rights Agreement (the “Rights Agreement”) affording certain rights including with respect to future transactions that may arise related to the Company’s Golden Crest Properties (as identified in the Rights Agreement). Effective upon closing on the purchase and sale of the shares identified above, the parties amended the Rights Agreement through an Amended and Restated Investor Rights Agreement (the “A&R Agreement”). The A&R Agreement served to amend certain terms of the Rights Agreement, including to (i) define the term “Golden Crest Properties” to also include a two kilometer area of interest surrounding the properties, (ii) provide Newmont a right of first refusal with respect to certain transactions, such as a sale or joint venture, involving the Golden Crest Properties (whereas the original Rights Agreement granted Newmont a right of first offer with respect to the those prospective transactions), and (iii) create a technical committee with respect to the Golden Crest Properties comprised of two members appointed by Newmont and two members appointed by the Company, with such committee to serve solely as an advisory committee without the authority to bind the Company. Otherwise, the A&R Agreement did not serve to materially amend the terms of the Rights Agreement, and, instead served to restate other material terms. The Company expects to utilize the proceeds from the sale of the shares to Newmont to fund anticipated exploration activities and expenses related to its Golden Crest, Lik, and Florida Canyon projects, as well as for general corporate purposes. A copy of the SPA is filed with this report as Exhibit 10.1 and the summary of the SPA in this report is qualified by reference to that exhibit. A copy of the Rights Agreement is filed with this report as Exhibit 10.2 and the summary of the Rights Agreement in this report is qualified by reference to that exhibit.

Item 3.02 Unregistered Sales of Equity Securities In addition to the shares of common stock sold to Newmont pursuant to the SPA described above, on June 18, 2025, the Company closed on a concurrent private placement of its common stock involving a single third-party investor (the “Offering”). That investor agreed to purchase 5,555,555 shares of Company common stock. The Offering was not underwritten by a broker, the Company did not engage a placement agent for the Offering, and there were no underwriter discounts or commissions. The shares of Company common stock sold in the Offering, and those sold to Newmont pursuant to the SPA, were sold at US $0.63 per share. The per share sales price was calculated based on the prior 90-day volume weighted average price of the Company’s common stock. As it relates to the Offering, and the shares of Company common stock offered and sold to Newmont pursuant to the SPA, the Company relied on the exemptions from registration set forth in Section 4(a)(2) under the Securities Act of 1933, as amended, and Rule 506(b) promulgated thereunder. In connection with such offers and sales the Company: (i) did not engage in any public advertising or general solicitation in connection with the Offering; (ii) reasonably believed that each investor was sophisticated and an “accredited investor” and understood the risks of acquiring shares of Company common stock; and (iii) believed that each investor acquired the shares for investment purposes. No officers, directors or other affiliates of the Company participated in the Offering or the investment by Newmont. The closing of the Offering and the investment by Newmont was subject to the filing of additional listing applications with the NYSE American Stock Exchange and the Toronto Stock Exchange, (collectively the “Exchanges”) with respect to the shares of Company common stock offered and sold, and the Company received the necessary approvals of the Exchanges to effect the closing.

Item 8.01 Other Events On June 20, 2025, the Company issued a press release announcing the investment from Newmont and the closing of the Offering. A copy of that press release is attached to this report as Exhibit 99.1. The information furnished under this Item 8.01, including the exhibit, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, nor shall it be deemed incorporated by reference in any filing under the Securities Act, except as shall be expressly set forth by reference to such filing.