Anthropic IPO filing sets up $135B windfall for Alphabet, Amazon, Zoom

Anthropic's confidential IPO filing marks a milestone for the AI sector, bringing one of the largest independent AI companies to public markets. The company's approach of $965 billion（約150兆円） valuation in private markets reflects how central large language models have become to corporate strategy. Alphabet, Amazon, and Zoom are not passive shareholders—they have built strategic relationships into their investments, with Amazon tying a $25 billion（約4兆円） commitment to future AWS spending by Anthropic, signaling how cloud infrastructure providers view AI as foundational to their competitive position.

Alphabet's portfolio of AI bets extends beyond Anthropic: the article notes its $900 million（約1400億円） investment in SpaceX in 2015 is now worth approximately $104.6 billion（約17兆円）, and its 75% stake in Waymo (valued at roughly $95 billion（約15兆円） at a $126 billion（約20兆円） valuation) demonstrates a long track record of early-stage AI and automation bets. Amazon's early bet of $1.25 billion（約2000億円） in September 2023 has compounded to a position worth $74.2 billion（約12兆円） in less than two years—a more than ninefold return on the initial deployment. For Zoom, an investment made through its venture arm during the Series C round in May 2023 has similarly appreciated to almost $1.3 billion（約2100億円）. These returns suggest that for large tech companies with capital and strategic vision, early exposure to leading AI models has proven highly lucrative.