Astra Space founders Chris Kemp and Adam London proposed to acquire the small rocket maker once valued at more than $2 billion for $27.8 million, according to a regulatory filing on Thursday. The offer price of $1.50 per share represents a premium of about 103%, based on the stock's closing price on Wednesday. The company's shares, which surged about 80% on Thursday, have fallen 99.6% since Astra went public in 2021 after a few mission failures and delays in test flights in an industry dominated by Elon Musk's SpaceX.