Omineca Mining and Metals Ltd. Enters Agreement for Wingdam Placer Project Interest

Saskatoon, Saskatchewan — November 12, 2026 — Leads & Copy — Omineca Mining and Metals Ltd. (TSXV: OMM) has entered into a binding letter of intent with HMI Mining to acquire a 50% interest in Omineca's Wingdam Placer Project. HMI will also serve as the project contractor, overseeing the planning, engineering, and operation of the underground placer program.

The Wingdam Placer Project is situated in British Columbia's Cariboo Mining District, approximately 26 kilometers west of Osisko Gold Group's under-construction Barkerville Gold Mine. Under the agreement, HMI will secure an undivided 50% ownership stake, establishing Omineca and HMI as joint venture partners with HMI acting as the onsite operator responsible for mining and engineering services.

In its capacity as operator, HMI will manage ongoing permitting, environmental monitoring, regulatory compliance, engineering, and site operations, including equipment and services. Omineca will maintain a 50% carried interest through to and beyond commercial production. HMI holds the exclusive right to mine all placer gold on the project claims, and will deliver 50% of all recovered gold to Omineca. The cost for Omineca's share will be CAD $1,000 per ounce, plus an additional CAD $250 per ounce until a five-year mine plan is submitted.

Omineca expressed enthusiasm about welcoming HMI and its affiliates to the Wingdam project, noting that HMI's principals possess extensive experience in materials science, ground stabilization, and engineering, making them an ideal partner for the project's development.

HMI, the press release states, brings integrated engineering and operations expertise to the Wingdam project. The company specializes in advanced materials science, supporting specialty product and application equipment manufacturing. HMI's international experience includes custom-formulated chemical systems for geotechnical grouting and ground support, complemented by patented technologies and specialized design systems, which will provide the engineered structural control and mining capabilities necessary for Wingdam.

The agreement is contingent upon acceptance by the TSX Venture Exchange.

Omineca's flagship Wingdam project encompasses both hard rock exploration and placer gold recovery. Located along the Barkerville Highway, approximately 45 kilometers east of Quesnel, BC, the Wingdam Property includes mineral tenures totaling 61,392 hectares (613 square kilometers) and over 15 linear kilometers of placer claims. These claims cover the Lightning Creek valley, where thick overburden has preserved a buried paleochannel rich in placer gold-bearing gravels. Omineca is also conducting exploration for potential hard rock sources of this placer gold.

Additionally, Omineca's Fraser Canyon Project, part of its original Cariboo Mining District acquisitions and located 12 kilometers northwest of Quesnel, BC, is slated to reinitiate the development of its underground paleochannel for placer gold recovery. Historically, two mines in the vicinity of the Fraser River produced a combined 1,482 ounces of raw placer gold.

Source: Omineca Mining and Metals Ltd.