Mr. Musk’s rocket and satellite maker opened at $150 per share, up 11 percent from its I.P.O. price, and then shot to well over 20 percent.

Elon Musk just became the world’s first trillionaire thanks to the record-breaking IPO, which also minted a new billionaire and boosted the fortunes of many others.

Elon Musk became the world’s first trillionaire in the blockbuster debut.