Key Takeaways:
Elon Musk added roughly $172 billion to his net worth in a week as SpaceX shares surged 35 percent, matching Steve Ballmer's entire four-decade fortune.
"All capex is not the same," Bret Johnsen, SpaceX's chief financial officer, said on the earnings call, pushing back against investor concerns about the company's $18.4 billion quarterly capital expenditure.
SpaceX shares closed at $146.15, up 9.65 percent on the day and 34.99 percent over the past week. The rally reversed a 13 percent drop on Aug. 5 after the company's first public quarterly report showed revenue of $7.81 billion, beating the $6.82 billion consensus, but capital expenditures of $18.4 billion — $15.8 billion of it on AI compute — spooked investors. Musk's net worth bottomed at $701.5 billion on Aug. 5, according to Forbes, before the stock jumped 11.7 percent on Aug. 7 and closed back above the $135 IPO price by Aug. 10.
The comparison to Ballmer's fortune — built over four-plus decades as Microsoft's second employee, CEO from 2000 to 2014, and now its largest individual shareholder — shows the unprecedented pace of wealth creation tied to SpaceX's post-IPO volatility. Ballmer's $172 billion is anchored in about 333.3 million Microsoft shares valued near $162 billion, with the stock up just 2.28 percent year-to-date. The next signal for investors is SpaceX's next earnings report, which will show whether the AI capex ramp continues accelerating or management moderates the pace that triggered the Aug. 5 selloff.
Morgan Stanley analyst Adam Jonas maintains a $300 base-case price target on SPCX, implying roughly 107 percent upside from current levels, with a bull-case scenario valuing the company at $8 trillion and a $600 target. Jonas has argued that many investors underestimate SpaceX's potential as it scales Starlink, develops orbital compute capabilities, and integrates its $60 billion acquisition of Cursor, an AI software platform. AI represents more than 60 percent of the valuation upside in the bull case, according to Jonas.
Argus Research upgraded SpaceX to Buy from Hold on Aug. 7, setting a $160 price target and citing rapid payback on AI investments and strong operational execution. That upgrade triggered a 15.8 percent single-day rally, closing at $133.11.
The stock's resilience reflects growing confidence in SpaceX's core business. In its first earnings report as a public company on Aug. 4, SpaceX reported Q2 revenue of $7.8 billion, up 92 percent year-over-year. Starlink, the connectivity division, posted revenue of $4.29 billion, a 66 percent increase, and now serves over 12 million subscribers. The company also executed a fresh Starlink launch on Aug. 12, deploying 24 satellites from Vandenberg Space Force Base in California, the second of a two-mission day that highlights SpaceX's operational tempo as it expands its constellation.
The comparison between the two billionaires is closer than the headline implies. The Aug. 5 low comes from Forbes while today's $884 billion figure comes from Bloomberg, and the two trackers routinely diverge by tens of billions due to different valuation methodologies. A Bloomberg-only weekly gain could land closer to $165 billion, leaving a thinner margin against Ballmer's $172 billion.
Ballmer's fortune has been essentially flat all year: down $3.62 billion in the most recent session, up just $3.80 billion year-to-date. On Aug. 11, Fortune reported that Ballmer and his wife Connie are splitting their $8 billion in giving into three regional philanthropies.
The S&P 500 traded at 7,769.60, up 0.25 percent, while the Dow Jones Industrial Average rose 0.29 percent to 53,948.70, as broader markets showed little reaction to SpaceX's outsized moves. The Nasdaq 100 gained 0.23 percent to 29,792.00.
For investors, the SpaceX rally raises a broader question about how markets price capital-intensive AI infrastructure plays. The company's $15.8 billion quarterly AI compute spend — larger than the entire annual revenue of most semiconductor firms — shows that the AI buildout is entering a new phase where single companies can deploy tens of billions per quarter. Whether that pace is sustainable will be tested at the next earnings report, and the outcome will likely influence how investors value other AI infrastructure names.
This article is for informational purposes only and does not constitute investment advice.
