£1330m BVT Surface Fleet (Glasgow & Portsmouth). Manufacture of lower stern and lower forward sections
£ 675m Babcock Marine (Rosyth). Bows; upper hull sections; final assembly
£ 425m Thales UK. Design and engineering services
£ 300m BAE Systems Submarine Solutions (Barrow). Amidships hull blocks
£ 275m BAE Systems Insyte. Design and supply mission systems
£ 800m To be competed. Upper hull sections; islands
According to a recent Parliamentary Answer, 60% of sub-contracts will be competed.
Of course, the elephant on the flight deck is the aircraft: pick a number in the vicinity of £10 billion, convert into dollars and send west!
(Data source: BVT Surface Fleet talking to Jane's Defence Weekly)