What risk is hiding under the headline numbers in the data room?
A vendor data room shows you the target’s tier-1 and its contracts. It won’t show you the concealed concentration deep in the chain — the dependency you’d inherit at completion.
Settled as the Acquisition Evidence PackConfirmatory diligence stops where the data room stops. The concentration that matters — the shared sub-tier sole-source, the foreign-controlled forging, the ownership exposure — usually sits below it, and surfaces after close, when the price is paid and re-trading is off the table. Supply-chain dependency, never a market, price or return call.
What you’d actually inherit at completion.
Typical reader: a corporate-development or infrastructure-fund deal team.
A control change can now be stopped, unwound or conditioned.
Civil Nuclear is one of the 17 mandatory sensitive sectors under the National Security and Investment Act, and the 2024-25 annual report (22 July 2025) recorded 1,143 notifications, 56 call-in notices and 17 final orders — one of them an unwinding. Add a concentrated, partly foreign-controlled forging and fuel base, and any acquisition of a nuclear supply-chain business can be stopped, unwound or conditioned, while confirmatory diligence has no published source for the dependency questions inside the target. Supply-chain dependency, never a market, price or return call. See what changed →