James Murdoch, the 53-year-old estranged son of Rupert Murdoch, put roughly $120 million into SpaceX between 2019 and 2020 -- $50 million and $20 million personally in 2019, followed by another $50 million through his holding company Lupa Systems in 2020. Following SpaceX's 2026 public debut, Pitchbook analyst Franco Granda estimates those shares could now be worth between $6.57 billion and $7.44 billion, a return of roughly 50 to 60 times the original outlay.
Granda is careful to hedge the estimate: "it's very hard to say with certainty what the actual potential windfall might be," he told Fortune, citing the complexity of SpaceX's share classes and a five-for-one stock split the company approved in May 2026 ahead of its listing. Even at the low end of that range, the position ranks among the largest personal venture-style paydays of the current IPO cycle, rivaling or exceeding stakes held by SpaceX's earliest institutional backers.
Murdoch's relationship with Elon Musk predates the SpaceX investment by two decades. The two first crossed paths in the late 1990s while both were building early tech ventures, then reconnected in the mid-2000s after James ordered a Tesla Roadster. That relationship deepened when Murdoch joined Tesla's board in July 2017, a seat he still holds, and it has separately paid off in the form of $107 million in Tesla share sales since spring 2025 -- meaning Murdoch has now built substantial, largely uncorrelated wealth from two different Musk companies rather than one.
“The two first crossed paths in the late 1990s while both were building early tech ventures, then reconnected in the mid-2000s after James ordered a Tesla Roadster.”
SpaceX's 2026 listing was itself a landmark event, widely reported as the largest IPO in history, and early, patient private investors like Murdoch are exactly the constituency such offerings are designed to reward -- long-dated conviction capital that arrived years before the company's valuation became obvious to public markets. Unlike institutional venture funds that must show marked gains to LPs on a quarterly cycle, an individual investor like Murdoch could simply hold through SpaceX's multi-year path to an IPO without external pressure to exit.
The contrast with Murdoch's family situation is difficult to ignore. Rupert Murdoch chose younger brother Lachlan to lead News Corp and Fox Corporation's succession, a decision that effectively pushed James out of the family media business he grew up in. That his largest wealth-creation event as an adult happened entirely outside the Murdoch empire -- built instead on a personal bet on Musk a decade before SpaceX's IPO -- is the kind of detail that will follow both men's public narratives for years.
For other early SpaceX backers and Musk-adjacent angels, Murdoch's disclosed returns are a data point worth watching closely: if a $120 million check from 2019-2020 is genuinely worth $6.5-7.4 billion today, it recalibrates what "early" conviction in Musk's companies has actually been worth across this cycle, and it will likely accelerate interest in whatever Musk-affiliated private company raises capital next, from xAI to Neuralink.
The bear case: none of this is realized gain until Murdoch actually sells shares, and SpaceX's stock, like any newly public company's, could see substantial volatility once lockups expire and more of the register becomes freely tradable -- a $7 billion mark-to-market estimate is not $7 billion in the bank. What to watch next: whether Murdoch or Lupa Systems disclose any share sales following SpaceX's post-IPO lockup expiration, and whether other early, previously undisclosed SpaceX backers surface with comparable stories now that the cap table is coming into public view.