Elon Musk could become the world’s first trillionaire this week if SpaceX opens above its expected IPO price, turning the company’s public debut into a historic wealth and market-structure event. SpaceX plans to offer 555.6 million Class A shares at $135 each, with the stock expected to list on Nasdaq and Nasdaq Texas under the ticker SPCX. The deal carries an expected pricing date of June 11, while public trading is expected to begin on June 12.