In 2019, Microsoft wrote a $1 billion check into a small AI research lab called OpenAI that had never shipped a product. That check looked like a science project. Over the following four years, Microsoft funded $11.8 billion of a $13 billion commitment across three rounds. Its 27% stake is now officially valued at $135 billion, an 11x return on funded capital.

Google moved first on Anthropic. In April 2023 it invested $300 million for a 10% stake in a company most of the world had never heard of. A follow-on investment of $2 billion brought its stake to 14%. At Anthropic's projected $900 billion valuation, that 14% is worth $126 billion. A 42x implied return on $3 billion invested.

Amazon entered five months later in September 2023, committing $1.25 billion upfront with more to follow. Total invested: $8 billion. Its minority stake is now worth over $70 billion, roughly a 9x return.

Three public companies Microsoft, Google and Amazon.  Combined investment: roughly $23 billion. Combined return value: over $330 billion. In absolute dollar terms, these are the largest venture returns any public company has ever recorded.

The natural reaction is to call this a bubble. Unprecedented capital, private valuations in the hundreds of billions, infrastructure spending at a scale the world has never seen in a single quarter. The skepticism is understandable.

It is also wrong.

Bubbles are built on speculation about future demand. What we are watching is different. Anthropic's annualized revenue hit $30 billion in March 2026, up from $9 billion four months earlier. Over 1,000 enterprise customers are each spending more than $1 million annually on Claude, a figure that doubled in under two months. OpenAI has 900 million weekly active users with enterprise representing more than 40% of revenue. This is not a projection. It is a meter running.

And it is still early. Enterprise AI is moving from pilot to core infrastructure. Every Fortune 500 that embeds Claude or GPT into its workflows becomes a recurring revenue contract. Unlike traditional software sold on seats, AI scales on usage. The more a business grows, the more it spends. The ceiling is orders of magnitude higher than anything that came before it.

Google and Amazon are spending hundreds of billions building the chips and data centers that power AI. Anthropic and OpenAI are contractually committed to consume that infrastructure. At this scale of construction, idle compute is the only unacceptable outcome. Anthropic and OpenAI are the anchor tenants.

The incumbents did not just make a great investment. They made a great client. Microsoft, Google, and Amazon are booking equity returns on one side of the ledger while collecting infrastructure revenue on the other. Anthropic and OpenAI need compute to run. The same companies that own their equity are selling them the compute to grow. The investment appreciates, the cloud contracts compound, and the inference revenue flows back to the same balance sheets. It is the same trade twice. OpenAI is valued at $852 billion. Anthropic is closing a round above $900 billion. 

One of them will be worth $1 trillion before the year is out, and the companies that funded them will profit from every token they generate.

Bashar Aboudaoud
Managing Member, UpRound