Reports said Anthropic was finalizing a roughly $20B funding round that would value the company at about $350B, with Microsoft and NVIDIA cited as major sources of capital alongside a broader syndicate of large investors. The coverage framed Microsoft’s participation as a strategic hedge given its longstanding alignment with OpenAI, and tied the valuation narrative to Anthropic’s recent product momentum (notably coding agents and specialized domain models) amid escalating compute costs.
Separately, analysis of Big Tech financial guidance and filings described a sharp step-up in AI infrastructure CapEx for 2026, led by Amazon disclosing $200B in planned capital expenditures and warning via an SEC filing that it may need to raise equity and debt to fund build-out. The same piece cited Alphabet ($175–$185B), Meta ($115–$135B), and Microsoft (~$145B run rate), putting the “Big Four” at roughly $635–$665B and arguing the industry is restructuring internet-scale infrastructure around AI workloads, with capital intensity reaching historically high levels (e.g., Oracle and Microsoft cited as elevated vs. revenue).

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Bloomberg-cited reporting says Anthropic is finalizing an oversubscribed $20 billion financing round that would value the company at about $350 billion. The round was said to be driven largely by Microsoft and NVIDIA, with participation from major venture firms and Singapore's sovereign wealth fund.
As the 2026 spending outlook became clear, investors reacted negatively to the higher CapEx guidance and weaker free-cash-flow expectations. The reporting says Amazon also warned in an SEC filing that it might need to raise equity and debt to help fund the expansion.
By early 2026, Amazon, Alphabet, Meta, and Microsoft were described as guiding to a combined 2026 capital expenditure total of roughly $635 billion to $665 billion for AI infrastructure expansion. The spending surge was framed as an escalating hyperscaler arms race with rising capital intensity and depreciation risk.
Anthropic had completed a major $13 billion investment round about five months before reports of its new financing. The article says this earlier backing came primarily from Amazon and Google.
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