French IT firm Atos put a price tag on a state offer to take over strategic parts of the company on Monday, boosting its shares, but also said it would need almost twice as much cash as estimated earlier this month to stay afloat.

The French government has proposed buying key assets of Atos, the heavily indebted technology company, because Paris wants to keep them in national hands. The state wants to purchase three strategic parts of Atos: super calculators for quantum computing,