Two investors are telling very different stories about SpaceX. Ron Baron's fund emphasizes the growth potential of a company it has held for years. David Einhorn's Greenlight, meanwhile, looks at the price set at the IPO and worries that the market is overheated.
Who better understands SpaceX's future? Yet perhaps there is a question worth asking before that one: Are the two really looking at SpaceX at the same price?
Baron Has Been Investing in This Future for Years
According to the Baron Partners Fund Q2 2026 letter, the manager began accumulating SpaceX shares in 2017, when the company carried an enterprise value of roughly $21.6 billion, and added to the position in subsequent funding rounds. As of June 30, 2026, SpaceX represented 32.9% of total investments. It is worth noting that this is a share of total investments, not of net assets. [1]
What Baron emphasizes is the falling cost of accessing space through reusable rockets and the expansion of Starlink. The view is that the ability to reach space cheaply can open up opportunities for other businesses, including communications. The manager is optimistic about the company's long-term revenue and earnings growth. [1]
Seen this way, SpaceX is not simply a rocket manufacturer. The perspective here is that rockets are the foundation that makes other businesses possible. That said, the potential of new businesses does not automatically translate into gains for shareholders. The required investment, competition, and actual cash generation all need to be examined together.
For a long-term holder, the company's progress to date may serve as confirmation of the original judgment. But that does not mean someone buying for the first time today gets to enjoy those results on the same terms. Between the initial investment price and today's price sit expectations the market has already priced in.
Einhorn Asks About the Price of That Future, Not the Future Itself
Greenlight's Q2 letter, dated August 6, 2026, notes that SpaceX was valued at $1.75 trillion at its June IPO. Einhorn first congratulates those who invested while the company was private and made large gains, but then raises sharp questions about the newly established price. [2]
His argument is somewhat different from dismissing the future of the space business. The question is whether the sum of the possible futures, discounted to present value at a rate commensurate with the risk, could come anywhere near the market capitalization at the time. He warns that the IPO may, in hindsight, come to be seen as a sign of a speculative peak. At the same time, he acknowledges that an expensive price does not prevent a stock from rising further. [2]
This point matters a great deal. Finding a good company and investing at a good price are alike, but they are not the same task. As a company's probability of success rises, the stock price may move first, and the investor's share of the payoff can actually shrink along the way.
Of course, Einhorn's warning should not be taken as a short-term stock price forecast. Investors who worry about price do not always call the market's direction correctly ahead of time, either. Nor do the warnings cited in this post prove that he actually shorted SpaceX.
A Difference Over the Company's Future, or Over the Investor's Starting Point?
Placed side by side, the two letters shift the focus of the comparison somewhat.
| Comparison | Baron's Letter | Greenlight's Letter |
|---|---|---|
| Core question | What businesses can it grow into? | How much is being paid for that potential? |
| Vantage point | A long-term holder invested since 2017 | An investor critically examining the IPO valuation |
| Emphasis | Business expansion and long-term growth | Risk-adjusted present value and market expectations |
This table does not define either man's entire investment philosophy; it simply summarizes the differences each letter emphasized. It does not mean Baron ignores price, or that Einhorn has no interest in growth.
What is more interesting is that a long-term holder and a newcomer can look at the same company and reach different decisions. Deciding whether to keep holding an asset you already own is a different problem from deciding whether to buy that asset for the first time with the cash you have today. That is why a legend's ownership, on its own, is a weak basis for a new purchase.
What We Should Examine Is the Assumptions, Not the Big Names
To follow this debate, it is better to probe what the current price demands than to ask which side is more famous.
The key questions are how much of Starlink's growth translates into actual cash flow, how much capital the new businesses will require, and how long the wait will be for expectations to become reality. When assessing present value, we must lay out not only the successful futures but also the delayed and failed ones.
View the probabilities differently or apply a different discount rate, and the fair value of the same company changes. In the end, this debate is less a question of whether one "believes in the future" and closer to a question of how distant a future you are buying, and at what probability and price.
Conclusion
Baron is looking at the potential of a company he invested in long ago; Einhorn is asking about the price the market has attached to that potential. More than the fact that the two men disagree, what may matter most to investors is whether you can ask both questions at the same time.
Ignore growth potential and you may miss a great company. Focus only on growth potential and you may overpay for one. Even for a company with a brilliant future ahead of it, if that future is paid for in full in today's price, the investor's share of the payoff can be small. Perhaps the two legends' contrasting views on SpaceX are a case study in exactly that gap.
References
[1] Baron Partners Fund — Q2 2026 Quarterly Letter. Holding weight as of June 30, 2026. This document explains the manager's views and is not an independent verification of business prospects.
[2] Greenlight Capital — Q2 2026 Letter, August 6, 2026, p. 2. A public copy of the letter authored by Greenlight. Valuations and market assessments are as of the letter's date and do not represent current prices.
Disclaimer: This post is informational content summarizing public filings, analysis, and the author's views; it is not a recommendation to buy or sell any particular stock.