Boom Supersonic raising $300M at a $1. 5B valuation Boom Supersonic is flying high The company building a supersonic civilian jet is finalizing a $300 million raise, according to an email CEO Blake Scholl sent to investors last week The round is expected to close early next week and gives the Centennial-based company a $1 5 billion post-money valuation, Scholl said in the email, which was obtained by BusinessDen The round is led by Darsana