Alphabet briefly passed Nvidia by market capitalization in after-hours trading this week, the first time Google's parent has carried the title of the world's most valuable company since the artificial-intelligence boom began. Alphabet shares are up about 160 percent over the past 12 months, and the company closed the week at a $4.8 trillion market cap, behind only Nvidia at $5.2 trillion.
The brush past underscores a rotation inside the AI trade. Investors who spent two years paying almost any price for Nvidia's graphics processors are now bidding up the cloud and model owners that buy them, while Nvidia recycles cash into the supply chain to keep the flywheel turning. Among tech's seven other U.S. trillion-dollar companies, the next-best 12-month performer is chip designer Broadcom, up 107 percent.
What changed this week
Alphabet and Nvidia flip-flopped momentarily after markets closed Tuesday, following a report that AI model developer Anthropic committed to spend $200 billion on Google Cloud over five years for 5 gigawatts of compute. After Alphabet's earnings last week, JPMorgan analysts called the stock their top pick in tech and pointed to a cloud backlog that nearly doubled to $462 billion.
Gene Munster, managing partner at Deepwater Asset Management, told CNBC that Google now sits in a category of two. "Google is one of the two best-positioned AI companies because they own most of the stack," Munster said. The other, in his telling, is Elon Musk's SpaceX, which merged with xAI in February in a deal valued at $1.75 trillion.
Nvidia's checkbook
Nvidia is answering the rotation by spending. The chipmaker has already topped $40 billion in equity commitments in 2026 and signed at least seven multibillion-dollar investments with publicly traded companies. This week Nvidia secured the right to invest up to $2.1 billion in data-center operator IREN, a day after agreeing to put up to $3.2 billion into 175-year-old glass maker Corning. Shares of both popped on the news.
The IREN agreement bundles the equity stake with a commitment to deploy up to 5 gigawatts of Nvidia's DSX data-center designs. The Corning deal funds three new U.S. plants for the optical components Nvidia needs as it shifts from copper to fiber inside its rack-scale systems. The earlier ledger looks better still: Nvidia's $5 billion bet on Intel, struck last year, is now worth more than $25 billion. Friday's beat is a counterpoint to last week's reading of the same trade, when Samsung crossed $1 trillion and AMD reported $5.8 billion in quarterly data-center revenue.
Counterpoint
Today's reporting on the AI balance sheet came only from CNBC's center-bucket coverage, and no prominent skeptic was on the record by press time framing the Alphabet-Nvidia handoff as a top. Inside the same CNBC pieces, analysts did flag concentration risk: D.A. Davidson's Gil Luria noted that Anthropic alone could account for more than 40 percent of Alphabet's cloud backlog, and Mizuho's Jordan Klein called Nvidia's investments in so-called neoclouds "more questionable" because they look like pre-funding the purchase of Nvidia's own chips.
Google is due to host its annual I/O developer conference in less than two weeks, where it is expected to update investors on Gemini's agent strategy. Nvidia reports fiscal first-quarter earnings later this month, with analysts polled by LSEG looking for 78 percent revenue growth.