Investor's Corner
Insight Into How Elon Musk Funds His Business Ventures
Elon Musk does not follow the herd. Even though most executives do not use their private wealth to fund business ventures, Musk believes it is important to to show that he personally has skin in the game.
More than almost any other entrepreneur, Elon Musk finances his three primary business ventures — Tesla Motors, SolarCity, and SpaceX — by leveraging his own personal assets. The Wall Street Journal (WSJ) says those three companies are valued at close to $50 billion, largely because of Musk’s “voracious appetite for risk and unyielding optimism.”
A study in February by ISS QuickScore found that just 13% of executives or directors at the 3,000 largest companies have pledged shares they own in those companies as collateral for personal loans.
Of the $105 million in bonds sold by SolarCity since October, 2014, SpaceX has purchased $90 million. Musk has taken out $475 million in personal loans at various times to help out one or another of his business interests when they needed cash injections. Those loans are secured by $2.5 billion worth of shares he owns in Tesla Motors and SolarCity, based on market values from this week.
WSJ says few top executives use their personal funds to support their business ventures because it can place them in conflict with other shareholders. It could also subject them to a margin call that could disrupt normal trading in company shares. “As an analyst, it is often a red flag for me when companies and management direct loans between entities they have personal or financial interests in,” says Nathan Weiss, founder and senior analyst at independent research firm Unit Economics LLC in East Greenwich, RI.
“There are a few cases where one company was doing considerably better than another and I borrowed money,” Musk says via WSJ. “If I ask investors to put money in, then I feel morally I should put money in as well […] I should not ask people to eat from the fruit bowl if I have not myself been willing to eat from the fruit bowl.” In other words, he thinks it’s important for others to see that he has skin in the game.
Musk says the odds of him not being able to handle a margin call are “almost zero.” That’s because his exposure is less than 5% of his total worth. He says he has “made it clear to shareholders that I subscribe to the notion that the captain is the last person off the ship.”
Venture capitalist Steve Jurvetson, a major early investor in all of Musk’s companies, says he is not concerned that Musk has pledged his own shares. As long as the total is less than 5% of Musk’s total net worth, “you don’t have much to talk about.” Jurvetson raves about Musk, saying “his passion is breathtaking.”
Republicans in Congress are less in awe of Elon, however. Now that SpaceX has signed contracts worth billions of dollars with NASA, they are proposing legislation that would prohibit Musk from using his stake in SpaceX as collateral for other loans, particularly to SolarCity. The solar power company has recently had a loud and contentious spat with the Nevada Public Utilities Commission, which voted to impose a monthly fee on all rooftop solar installations in the state.
In response, SolarCity has shuttered his operations in Nevada and laid off hundreds of employees. How that plays out as the Gigafactory comes online should be interesting, since the same utility company (owned by Warren Buffett) that imposed its will on the Nevada PUC will also be the energy supplier to that gigantic manufacturing process. Tesla intends to sell excess power back to the utility, a process that started the whole controversy in Nevada in the first place.
Representative Douglas Lamborn, Republican from Colorado, says the proposed legislation is intended to send a message to Musk that his moves are being watched and monitored. A SpaceX spokesman retorts that SpaceX’s “cash balances are not government money’.”
Elon keeps his political leanings well out of public view. But it is clear his propensity for disrupting the established order has made a few enemies along the way.
Source: The Wall Street Journal
Elon Musk
Elon Musk handed Grok something no other AI company can get their hands on
Elon Musk says SpaceX will feed engineering data into Grok’s next model, avoiding restricted material.
Elon Musk said Tuesday that SpaceX will feed its internal engineering data into the next major training run for Grok, the AI model now folded into SpaceX following February’s merger. In a post on X, Musk wrote that SpaceX’s “massive corpus of world-class engineering data,” excluding anything restricted under U.S. arms export law, will be added during supplemental training of what he called the “2T run,” a reference to a roughly two trillion parameter model that would nearly double the parameters behind the latest Grok 4.5 that’s rolling out.
SpaceX’s massive corpus of world-class engineering data (excluding material blocked by ITAR) will be added during supplemental training of the 2T run.
This will dramatically improve Grok’s engineering capabilities. https://t.co/BbQEViFByn
— Elon Musk (@elonmusk) July 21, 2026
The excluded material that Musk is referring to would fall under the International Traffic in Arms Regulations (ITAR), which restricts export of technical data tied to defense and space hardware. That likely rules out propulsion specifics for Merlin and Raptor engines along with guidance and control details for SpaceX’s launch vehicles, but leaves manufacturing knowledge, materials science, and Starlink hardware design on the table.
The announcement extends a pattern that has been building since SpaceX’s Nasdaq debut in June, when the company went public with Grok and xAI’s Colossus supercomputer folded into the pitch to investors.
Days after that listing, SpaceX closed its $60 billion all stock acquisition of coding startup Cursor, giving xAI both enterprise software distribution and a stream of real world developer data to train on. Grok 4.5 launched July 8 running partly on that Cursor training data, with Musk describing it as roughly comparable to Anthropic’s Opus 4.7 but faster and cheaper to run.
Feeding SpaceX’s own engineering data into the next AI model follows the same logic Musk has applied across xAI’s sister companies. Tesla supplies real world driving data and manufacturing expertise, X supplies conversational data, and now SpaceX supplies aerospace engineering data built up since 2002.
Musk did not give a release date for the upcoming AI model, referred to elsewhere as Grok 4.6. He has said the two trillion parameter run is in its final training phase and expected to wrap this week.
In a pointed message on X, Elon Musk warned that firms maintaining significant short positions in SpaceX over time face “very low” survival probability.
The statement comes amid post-IPO volatility for the rocket company, now trading under the ticker $SPCX.
The survival probability of firms who maintain a significant short position in SpaceX over time is very low
— Elon Musk (@elonmusk) July 17, 2026
Five weeks after what was described as the largest IPO in history, the stock had fallen roughly 30% from its peak above $2.6 trillion, briefly surpassing Microsoft and Amazon in market value. Short sellers celebrated gains of about $8.7 billion, but Musk’s reply underscores his long-term conviction.
The warning directly echoes a detailed bullish analysis arguing that Starship’s cost reductions could unlock a multi-trillion-dollar space economy. Projects ranging from solar power beamed from orbit and asteroid mining to orbital data centers and Mars terraforming were projected to create over $100 trillion in new market capitalization.
In this vision, SpaceX acts as the essential infrastructure provider, akin to AWS for cloud computing, capturing monopoly-like revenues from launches, crew transport, and data traffic across a rapidly expanding frontier.
This is far from the first time Musk has targeted short sellers. With Tesla, he has repeatedly framed persistent bears as destined for major losses. In July 2024, Musk declared that once Tesla achieves full autonomy and volume production of Optimus robots, “anyone still holding a short position will be obliterated. Even Gates,” referencing Microsoft co-founder Bill Gates’ reported short bets.
Elon Musk reveals what Tesla stock surge could do to Bill Gates
Earlier, in 2018, he taunted shorts that they had “about three weeks before their short position explodes,” a remark followed by sharp stock gains. Musk has also called short selling “value destroying” and once suggested it “should be illegal,” viewing it as betting against innovation and progress.
Critics often dismiss Musk’s optimism as hype, especially when near-term metrics like quarterly deliveries or stock fluctuations disappoint.
Yet his pattern remains consistent: framing short positions against his companies as fundamentally misjudging exponential technological leaps. For SpaceX shorts, the message is clear: betting against multi-planetary ambitions and the infrastructure monopoly they enable carries existential risk for the firms involved.
As Musk and supporters see it, the space economy’s upside dwarfs Earth-bound valuation models, making today’s dips temporary in a decades-long ascent.
Elon Musk
SpaceX Starship Flight 13 aborted at Zero and Musk just told us what broke
Four Raptor engines failed to ignite at T-zero, forcing SpaceX to scrub Starship Flight 13 Thursday.
SpaceX scrubbed the Starship Flight 13 launch attempt Thursday evening at the last possible moment, after four of the Super Heavy booster’s 33 Raptor 3 engines failed to ignite during the startup sequence. The 90-minute window had opened at 6:45 p.m. EDT from Starbase in Boca Chica, Texas, and the countdown had proceeded without issue all day, with more than 11.5 million pounds of liquid methane and liquid oxygen being fully loaded into the rocket before the automated abort triggered. SpaceX’s launch directors posted on X, “Standing down from today’s flight test attempt,” and shut down the livestream shortly after.
Musk confirmed the root cause within hours. “Some of the engines didn’t start, triggering an automatic launch abort,” he wrote on X. “To be confident of a good flight, 2 Raptors will be removed and replaced. Most probable launch timing is early next week.” SpaceX engineers began draining propellant tanks immediately and Booster 20 was rolled back to its hangar for inspection.
The timing adds a layer of significance that did not exist during any of the previous 12 Starship flights. This is the first time SpaceX has attempted to launch Starship since the company made its stock market debut in June, listing under ticker SPCX at $135 per share. Public investors are now watching every Starship outcome in real time, and a last-second abort carries more visibility than it would have six months ago.
Flight 13 was designed to be one of the most consequential tests in the program’s history. It was set to carry 20 Starlink V3 satellites, the first operational payload Starship has ever attempted to deploy. Six of those satellites carried external cameras to photograph Starship’s heat shield from the outside during flight, which would act as a self-inspection approach SpaceX has never attempted before. The mission also needed to complete a Raptor engine relight in space, a step SpaceX skipped on Flight 12 in May after losing an engine during ascent. That Flight 12 booster also flipped 90 degrees off course during its boostback burn when five engines failed to reignite.
SpaceX has not announced an official next launch date. Musk’s “early next week” window points to July 21 or 22 at the earliest, pending the engine swap and a return to the pad.
Elon Musk handed Grok something no other AI company can get their hands on
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