A SpaceX Falcon 9 rocket carrying a classified payload for the National Reconnaissance Office (NRO) launches from Cape Canaveral Space Force Station in Cape Canaveral, Florida, on Dec. 9. Alphabet Inc. is set to book another sizable paper gain after SpaceX completes a tender offer that effectively values the closely held company at about $800 billion. SpaceX’s insider share sale was priced at $421 a share, Bloomberg reported Friday, which would mark a sharp jump in valuation from earlier secondary transactions. That is likely to lift the carrying value of Google’s long-standing investment in Elon Musk’s rocket and satellite company.