In the weeks following SpaceX's record-breaking global IPO, the aerospace titan has swiftly transitioned from a new listing to a central investment for certain ETF funds. The allocation to SpaceX within the Baron First Principles ETF (RONB) has drawn particular attention.

An Aggressive Overweight Position

Public disclosures reveal that RONB's weighting in SpaceX has reached as high as 31.2%, a significant lead over comparable ETFs. As an actively managed fund, RONB is not constrained by the typical limits that index funds face regarding allocations to newly public companies, allowing for this concentrated position. Fund manager Ron Baron, a long-time associate of Elon Musk, began investing in SpaceX as early as 2017 when the company was valued at just $22 billion and has participated in 27 subsequent funding rounds. This deep, long-term commitment has made RONB one of the ETFs with the greatest exposure to SpaceX in the market.

A Trio of Growth Engines

Investment bank Wedbush noted in its initial coverage that SpaceX's operations span three key segments: launch services, satellite internet, and AI computing power. The Starlink satellite internet business serves as a cash flow generator with approximately 12 million users. The launch business holds a dominant global position. The AI compute leasing business is viewed as the segment with the highest growth potential, recently securing a major deal worth around $28 billion annually. This is the core rationale behind RONB viewing the company as a "first principles" investment.

Risks and Challenges

Despite the promising outlook, the 31% concentration in a single holding has raised market concerns. The fund lacks traditional diversification, and with SpaceX being a recent public listing, investors have limited insight into its performance across various economic cycles. Furthermore, SpaceX's ongoing substantial investments for expansion—with capital expenditures for the AI business alone exceeding 75% of related revenue—introduce uncertainty regarding its near-term profitability.

For investors with a higher risk tolerance, RONB offers a way to gain exposure to SpaceX's long-term growth story through an ETF structure. However, as some analysts have observed, this fund resembles a concentrated bet on Musk's business empire more than it does a diversified ETF.