Metals, Minerals and Mining Capital Raises and Investors in the U.S. – November 16th to December 31st, 2025
Several interesting transactions closed in the Metals, Minerals and Mining sector over the past month. If you would like more info or would like to discuss the capital raising market for your company, please contact me.
PIPE
- Sienna Resources, exploration-stage company that focuses on exploring for and developing high-grade deposits in politically stable, environmentally responsible and ethical mining jurisdictions, received CAD 1.9 million of development capital from an investor over 2 tranches.
- S. Gold, exploration and development company that owns certain mining leases and other mineral rights comprising the CK Gold Project in Wyoming, the Keystone Project in Nevada, and the Challis Gold Project in Idaho, received $31.24 million of development capital from Franklin Templeton Investments United Kingdom, Mackenzie Financial and Libra Advisors.
Merger/Acquisition
- Constantine Metal Resources, mineral exploration services that explore and develop mineral properties in North America, was acquired by Vizsla Copper for CAD 15 million.
Later Stage VC
- Disa Technologies, materials liberation technology that optimizes the world’s use of resources and disrupt best practices in the mining and reclamation industries, raised $35.08 million through a combination of Series A and Series A-2 venture funding in a deal led by Evok Innovations, putting the company’s pre-money valuation at $112.92 million.
- Rithmik Solutions, artificial intelligence platform that leverages predictive maintenance on mobile mining equipment, raised Series A venture funding from Hitachi Construction Machinery, Fire Phoenix Capital and Chrysalix Venture Capital.
Early Stage VC
- Alta Resource Technologies, mining technology for the extraction of critical minerals from a diversity of feedstocks, raised $28.38 million through the combination of Series A venture funding from investors, putting the company’s pre-money valuation at $79.12 million.
- pH7 Technologies, economical and sustainable process for extracting platinum group metals from primary and secondary resources and waste materials, closed on $25.6 million of Series B venture funding in a deal led by F-Prime Capital.
Seed Round
- Transition Biomining, custom products that increase metal recovery and processing speed from low-grade sulfides, raised $6 million of seed funding from SOSV and IndieBio, putting the company’s pre-money valuation at $10 million.
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Tina Vital
Managing Director
Please contact me if you have any questions or would like to discuss your capital raise:
Email: tvital@castleplacement.com
(C) (917) 432-8474
Send us a message:
Sources: Information on this page was derived from a variety of sources including Bloomberg, Company Websites, Crunchbase, PitchBook and other news outlets. Castle Placement® does not warrant or guarantee this information, nor makes any representations as to the accuracy of the information. For more Risks, see CPGO Risks and Disclaimers.
