SpaceX IPO turned Musk's stake to $1 trillion. Six billionaires inside.

SpaceX's record-breaking IPO last week pushed founder Elon Musk's personal holding above $1 trillion. The listing, priced at $135 a share, minted thousands of new millionaires. Several shareholders now hold stakes worth more than $1 billion, according to FactSet data compiled by CNBC.

SpaceX's market cap hit $2.43 trillion at Thursday's close. Shares were 37% above the offer price, even after cooling sentiment pared some of the early gains. At its peak earlier in the week, the company briefly surpassed Amazon and Microsoft.

The biggest single stake after Musk belongs to Valor Equity Partners, the Chicago-based investment firm. Valor's clients own shares worth roughly $96.6 billion. Its founder and CEO, Antonio Gracias, sits on SpaceX's board. Gracias met Musk more than 20 years ago through venture capitalist David Sacks, who until recently served as President Donald Trump's AI and crypto czar. Gracias also served on Tesla's board and worked with Musk on Trump's DOGE effort to slash federal spending.

Luke Nosek, a cofounder of PayPal, has been on SpaceX's board since 2008. His stake is valued at $6.3 billion. Nosek cofounded VC firms Founders Fund and Gigafund and was a board member at DeepMind before its acquisition by Google.

Gwynne Shotwell, one of Musk's earliest hires, runs the company day-to-day as president and chief operating officer. Her stake is worth $2.4 billion. On the day of the IPO, she told CNBC: "I feel like I'm there as a partner to help [Musk] get the things done that need to get done, and I tend to focus on the day-to-day of the business operations, and he focuses on high-level strategy, as well as super deep dive on the technical."

Nathan Silvernail, a former SpaceX engineer who worked on life support systems from 2014 to 2021, described Shotwell's role in sharper terms. "While Elon's setting the vision, she's the one making sure it gets delivered," he told CNBC. "She handles the operational execution that actually keeps the business running and brings in the funding. She's the one taking the meetings with customers, building those relationships, closing the contracts."

Bret Johnsen, SpaceX's chief financial officer since 2011, holds a stake worth $1.2 billion. He is responsible for the company's long-term financial strategy. Johnsen previously worked at chip companies Broadcom and Mindspeed Technologies.

These are paper gains. Standard IPO lockup agreements typically prevent insiders from selling for 90 to 180 days. The cooling sentiment over the past two days suggests the market is still pricing in uncertainty around SpaceX's revenue trajectory and Starship development costs. The next concrete event for the stock's valuation will be the company's first quarterly earnings report as a public company and the timing of the next Starship test flight. Until then, the billion-dollar stakes remain theoretical.