Gwynne Shotwell, President and COO of SpaceX, right, celebrates with colleagues during a bell ringing ceremony for the IPO of SpaceX at the Nasdaq MarketSite in New York, Friday, June 12, 2026, in New York. Frank Franklin II/AP Photo/Frank Franklin II As shares in Elon Musk’s SpaceX spiked in the days after the company’s record-setting initial public offering, so was talk of its possible merger with his Tesla Inc. It’s not the first time.