The public markets have been asked whether they believe in AI, and they have answered with $85 billion. Alphabet’s record-shattering equity offering, which priced on 2 June, is not just the largest stock sale in tech history. It is the largest equity offering of any kind, in any industry, ever.

The company had initially planned to sell $40 billion in a first tranche of shares and depositary instruments. Demand was so strong that the offering was oversubscribed and upsized to $45 billion, CEO Sundar Pichai said on X. Add a second $40 billion tranche planned for next quarter, and the total comes to roughly $84.75 billion.

Among the buyers: Berkshire Hathaway, not typically associated with AI exuberance, committed $10 billion in a private placement split evenly between Class A and Class C stock.

The numbers behind the number

The 💜 of EU tech

The latest rumblings from the EU tech scene, a story from our wise ol’ founder Boris, and some questionable AI art. It’s free, every week, in your inbox. Sign up now!

The previous record for an equity offering was held by Brazilian oil producer Petroleo Brasileiro, which raised $70 billion in 2010, according to Bloomberg. Alphabet beat it by more than $14 billion.

This is not a speculative bet on a loss-making startup. Alphabet reported $109.9 billion in revenue for Q1 2026, up 22% year on year, with Google Cloud growing 63% to $20 billion. The company is already the second most valuable in the world by market capitalisation, closing in on Nvidia.

The money raised is earmarked for AI infrastructure. Pichai described it as “part of our multi-year investment strategy to meet the AI opportunity ahead.” At Google I/O last month, he said Alphabet expects to spend between $180 billion and $190 billion on capital expenditure in 2026, up from an already staggering guidance of $175 billion to $185 billion issued in February. The vast majority is going to data centres and AI compute.

What it means for the AI IPO pipeline

The timing is not coincidental. Anthropic confidentially filed its IPO paperwork with the SEC on 1 June, one day before Alphabet priced its offering. The AI company, last valued at $965 billion, is targeting a public listing that could value it above $1 trillion. OpenAI is reportedly preparing its own filing.

For both companies, Alphabet’s successful raise is validation that institutional investors are willing to absorb enormous AI-linked offerings. If public appetite falters, the entire AI IPO thesis collapses. So far, the appetite looks insatiable.

The obvious comparison is the dot-com era, and it is not entirely unfair. The cyclically adjusted price-to-earnings ratio for tech stocks sits at 38, with market concentration exceeding 2000 levels. The critical difference, as analysts have noted, is that today’s AI companies are actually profitable. Alphabet’s operating margins are healthy. It is raising equity not because it needs to, but because it believes the return on AI infrastructure spending will justify the dilution.

The $8 trillion question

Goldman Sachs estimates that between $4 trillion and $8 trillion in total capital investment will flow into AI infrastructure over the next five years. That money has to come from somewhere: company revenues, debt markets (Alphabet has already tapped yen and euro bond markets this year), and equity sales like this one.

The question McKinsey’s latest research raises is whether the productivity payoff from all this spending will materialise at sufficient scale. If it does, the $85 billion Alphabet just raised will look like shrewd timing. If it does not, the record-breaking offering will mark the moment public markets went all in on a promise that had not yet been kept.

For now, investors are voting with their chequebooks. Warren Buffett, who once famously avoided tech stocks, just wrote a $10 billion cheque for Google’s AI future. That alone is worth paying attention to.