SpaceX CFO Bret Johnsen’s stake tops $1.4 billion after IPO
The finance chief hired in 2011 to prepare SpaceX for public markets now faces a broader investor audience after its $75 billion IPO.
By Maya Lindqvist · Senior Technology Correspondent
3 min read
SpaceX’s $75 billion initial public offering has turned Chief Financial Officer Bret Johnsen into a billionaire, with his stake now worth about $1.4 billion, Fortune reported. The listing also puts a low-profile finance executive at the center of explaining one of Elon Musk’s most ambitious companies to public-market investors.
Johnsen has been SpaceX’s only CFO, according to Fortune, and was hired in 2011 with an eye toward a future public listing. Musk said at the time that Johnsen’s background would help SpaceX put in place the financial practices required “to allow for the possibility of becoming a public company.”
The IPO was the largest in history, Fortune reported, and helped make Musk a trillionaire while raising the value of shares held by thousands of SpaceX employees. Fortune reported that the gains stretched beyond senior executives to skilled workers at the company.
A larger role after the listing
Johnsen’s brief now goes beyond the financial controls and investor pitch typical for an IPO CFO. SpaceX allocated 30% of its shares to retail investors, a larger share than is common in public offerings, according to Fortune, giving Johnsen a wider audience to address.
Shivaram Rajgopal, a professor of accounting and auditing at Columbia Business School, told Fortune that most IPO finance chiefs focus on accounting discipline, internal controls and the company story. He said Johnsen must also present a business that spans space, satellites, internet service, artificial intelligence and potential corporate combinations tied to Musk’s other companies.
Before the IPO, Johnsen worked on SpaceX’s acquisition of xAI, Musk’s artificial intelligence company, in an all-stock transaction valued at $1.25 trillion, Fortune reported. He also helped arrange a deal under which Anthropic agreed to provide some compute capacity to SpaceX’s Colossus data centers in Memphis, Tennessee, according to Fortune.
Johnsen described access to launch capacity as central to the company’s broader plans in an interview with investor Gavin Baker. “I tell people it’s hard to be a space company and not have assured access to space,” he said, adding that SpaceX has reached the lowest cost per kilogram to orbit in the industry and that launch capability supports Starlink, direct-to-cell service and AI compute.
A finance veteran with a low public profile
Johnsen, 57, keeps a far lower profile than Musk. Fortune reported that he has about 3,000 followers on X and no public posts, and that he rarely speaks publicly. The Information cited a SpaceX employee who described him as “a boring suit.”
Johnsen is from Los Angeles and studied accounting at the University of Southern California, where he now sits on the board of trustees, according to USC. He later earned a master’s degree in finance from San Diego State University.
Before joining SpaceX, Johnsen spent about a decade in a senior finance role at Broadcom, Fortune reported. He then became CFO of Mindspeed Technologies, a networking and telecommunications chip company.
At Mindspeed during the 2008 financial crisis, Johnsen cut jobs and spending, reworked debt, sold technology patents and raised money through share sales, according to the Orange County Business Journal. He told the publication that the downturn gave him room to make changes he believed were needed, and said he increased the company’s valuation fifteenfold over three years.
This story draws on original reporting from Fortune.