Elon Musk attends the 2024 Breakthrough Prize Ceremony. Credit : Taylor Hill/Getty

CNN – SpaceX went public Friday, with shares trading at just above $150 in a hotly anticipated initial public offering that values Elon Musk’s rocket and AI company at $2 trillion.

Musk celebrated the market debut Friday, jointly ringing the Nasdaq opening bell from SpaceX headquarters in Texas. He has now made history as the world’s first trillionaire.

SpaceX, which Musk founded in 2002, sold 556 million shares Thursday at an initial price of $135 a share, the company confirmed, marking the biggest IPO in history. Friday’s market debut represents an 11% increase on that pricing.