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Ducommun (NYSE: DCO; Delaware-incorporated, HQ Costa Mesa, California) is a US aerospace & defence supplier with two segments: Electronic Systems (high-reliability electronic/electromechanical assemblies, $462.7m 2025 net revenues) and Structural Systems (aerostructures, $362.0m).
Named counterparties identified by open-source research and written only where a primary source states the relationship — never inferred from sector or co-mention. 1 customer-side. This is a partial view: it covers the relationships we could evidence, not the company's full supply base.
RTX Corporation was Ducommun's largest customer in FY2025 at 18% of net revenues (Boeing second at 13%); top-10 customers combined were 61% of net revenues. No product/material breakdown disclosed.
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: 984 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.
US Customs bill of lading MEDULM384854, shipper Constellium (Issoire), Rue Yves Lamourdedieu, 63502 Issoire, France (aerospace plate mill), consignee DUCOMMUN INCORPORATED (aerostructures, Los Angeles area, California), product ALUMINIUM PLATES SHEETS, HS 76061293/76061299/76061292, 8,740 kg, country of origin France, sea freight on MSC BOSTON loaded at Fos-sur-Mer, arrival 2026-09-30. ImportGenius lists Ducommun Aerostructure as a top-5 Issoire consignee (115 containers). No value 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.
Every exposure is read as a buyer dependency; the top 2 are its binding chokepoints.
As a buyer, policy pressure across its consumed 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.