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Capstone Copper (TSX/NYSE: CS) is a Vancouver-headquartered pure-play copper producer with four operating mines in the Americas: Pinto Valley (Arizona), Cozamin (
Named counterparties identified by open-source research and written only where a primary source states the relationship — never inferred from sector or co-mention. 2 customer-side. This is a partial view: it covers the relationships we could evidence, not the company's full supply base.
Disclosed by the buyer. MMC release 2024-10-28: 'The first shipment of copper concentrate from the Mantoverde Mine in Chile, in which Mitsubishi Materials Corporation (MMC) holds a 30％ interest, arrived at our Naoshima Smelter & Refinery'; 'MMC has the right to offtake 30％ of the copper production.' Capstone Copper (70% owner/operator) is named as 'our partner in the mine'. related_party because MMC is a 30% JV owner of Mantoverde. No tonnage stated.
OR Royalties' FY2025 AIF (SEC 40-F Exhibit 99.1, filed 2026-03-30) lists its material stream/royalty portfolio: 'Mantos Blancos | Capstone Copper Corp. | 100% stream | Ag | Chile' — confirming OR Royalties still received 100% of payable silver as of 2025 year-end, not yet stepped down. Terms per Osisko's 2019-09-03 amendment press release (SEC 6-K Exhibit 99.1, sec.gov/Archives/edgar/data/1627272/000117184319005741/exh_991.htm): Osisko Bermuda Limited (OBL) provided 'an additional deposit of US$25 million to Mantos Copper' in exchange for 'a reduction of the ongoing transfer price payment per ounce from 25% to 8% of the spot silver price on the date of delivery' and 'an increase in the tail stream from 30% to 40% of payable silver after 19.3 million ounces of refined silver have been delivered' — i.e. OR Royalties buys 100% of Mantos Blancos' payable silver at 8% of spot until 19.3Moz cumulative delivery, then 40% at the same transfer price for the remainder of mine life. The original (pre-2019) agreement's date and initial terms are not disclosed in either filing checked. Silver is one of this dossier's scored materials (band: low, role: producer); the streaming company is the functional buyer of Mantos Blancos' silver output, the same pattern as Franco-Nevada/Candelaria on `lundin-mining.md`.
Scope. Absence of a counterparty here is not evidence that none exists — most commercial sourcing is confidential and never becomes public. Rows without a share figure mean no share was disclosed, not that the relationship is small.
Another tracked dossier names this company as a counterparty in its own sourced disclosure — this platform never wrote these rows on this company's own page, they are read here inverted from the dossier that disclosed them. This is a partial view: 1008 additional named-counterparty rows across the corpus could not be matched to a tracked dossier by name at all (mostly non-Latin legal names), so the true count is higher than what renders here.
MMC release 2024-10-28: 'The first shipment of copper concentrate from the Mantoverde Mine in Chile, in which Mitsubishi Materials Corporation (MMC) holds a 30% interest, arrived at our Naoshima Smelter & Refinery'; 'MMC has the right to offtake 30% of the copper production.' Capstone Copper (70% owner/operator) is named as 'our partner in the mine'. related_party because MMC is a 30% JV owner. No tonnage stated.
Scope. This section is inverted evidence: each linked dossier wrote the original row about itself, describing its own relationship to this company. It is never a claim this company itself disclosed. Absence here is not evidence of no relationship — most of the corpus has no named-counterparty block at all yet.
This company sits on the supply side for 3 of its 3 materials — a restriction on those is a tailwind, not a headwind.
As a producer, policy pressure across its produced materials is flat.
Descriptive trend in official policy actions on this company’s materials — a policy-pressure trend, not a price or trading signal. No forward probability is implied. Direction is measured on actions we have discovered, and discovery lags events: where the recent window is too thin to support a calm reading, the row says coverage-limited instead of easing.
No actions in the register have named or swept this company in the last 24 months.