For years, the only way to get a real look at SpaceX's finances was through secondhand reports and secondary share sales. That changed when the company filed its S-1 prospectus with the SEC in May 2026, giving the public its first audited view of a business that had operated almost entirely behind closed doors since its founding in 2002. The filing showed full year 2025 revenue of $18.674 billion, up sharply from the year before, alongside an operating loss of $2.589 billion and adjusted EBITDA of $6.584 billion. That gap between a strong EBITDA figure and a GAAP loss is worth sitting with for a moment, because it is a pattern beginner investors will run into again and again with fast growing companies. The difference largely comes down to non cash items like depreciation on the Starlink satellite constellation and stock based compensation, both of which are real costs but do not hit the cash register the way operating expenses do. The loss on paper is not fake, but it explains why a company can look profitable on one measure and unprofitable on another depending on which number is being read.  

The S-1 also broke the business into three distinct segments, and understanding how differently they perform is probably the single most useful thing an investor can take from the filing. Connectivity, built around the Starlink satellite internet service, is by far the strongest part of the business. It generated $11.387 billion in revenue in 2025 and turned a solid profit, growing subscribers past 10 million by early this year. The Space segment, which covers the actual rocket launches that made SpaceX famous, told a very different story. It brought in $4.086 billion in revenue but still operated at a loss, a reminder that even a company with a commanding lead in reusable rocket technology has not turned that dominance into consistent profit yet. The third segment, AI, is the newest and smallest, added after SpaceX completed its merger with Musk's xAI venture in February 2026. It is also the most speculative piece of the story, anchored in part by a striking disclosure in the filing that Anthropic agreed to pay SpaceX roughly $1.25 billion a month through 2029 for computing capacity, a deal worth close to $45 billion over its full term. Whether that AI ambition becomes a third real pillar of the business or an expensive distraction from the rocket and satellite operations remains one of the more interesting open questions for anyone following the stock.  

Trading since the IPO has been a lesson in what happens when a stock this large and this new meets a market full of eager retail buyers. Shares spiked to an intraday high of $225.64 within days of listing, then fell for three consecutive sessions, and kept sliding over the following weeks to a low near $108 in early August. Then came the company's first earnings report as a public company, showing second quarter revenue of $7.81 billion against analyst expectations of $6.93 billion, and the stock rallied back above its $135 IPO price for the first time since mid July.  

For a beginner investor looking at SpaceX today, the takeaway has less to do with whether the stock goes up or down from here. It has more to do with recognizing that a company built from three very different businesses, one turning a real profit, one still losing money, and one that barely existed a year ago, is genuinely harder to value than a single product company, and that the swings in the share price so far reflect a market still trying to work that out. That kind of uncertainty is not necessarily a reason to avoid a stock, but it is a good reason to size any position modestly and to spend more time reading the actual filing than watching the day to day price.