Anthropic IPO ranks first on multiple metrics despite huge losses

Anthropic is set to exceed the majority of historical IPOs in various categories, such as revenue retention, pre-IPO capital raised, and anticipated IPO proceeds.

In many other areas, the company places among the top three IPOs ever. Its revenue in the first half of 2026 grew 1,300% from the same period in 2025, a rate exceeded solely by Groupon's 2,200% at its IPO.

Furthermore, Anthropic's revenue per employee of $6.6 million is surpassed only by PBF Energy's 2012 IPO. Its expected valuation of $1.5 trillion places it third, after Aramco's $1.7 trillion and SpaceX's $1.8 trillion.

Anthropic ranks among top IPOs on negative metrics, too

Anthropic, the company behind Claude, reported a $66.3 billion loss in Q2, as stated in its IPO prospectus filed on Monday.

That figure exceeds AIG's $61.7 billion loss from late 2008, making it the largest quarterly loss in US corporate history, largely due to repriced convertible debt.

When the period is extended to 12 months, Anthropic still holds the top spot on this negative leaderboard.

In the year to June 30, 2026, Anthropic lost $109.7 billion, surpassing the prior records of AOL Time Warner's 2002 loss and AIG's 2008 loss.

Anthropic's accumulated deficit before its IPO stands at $132.9 billion, also the highest.

The company noted that this amount "includes $113.2 billion related to changes in the fair value of our convertible notes driven by increases in our enterprise valuation and derivative liabilities."

SpaceX, which previously held the record for accumulated deficit, reported $41.3 billion in its IPO prospectus.

In a more neutral measure, Anthropic leads in planned post-IPO spending. It anticipates allocating $265.6 billion to computational services in the coming years.

SpaceX, the previous leader here, revealed only $28 billion in non-cancelable commitments during its IPO.

Best net revenue retention in IPO history?

Lastly, Anthropic boasts a net revenue retention of about 900%, far exceeding any previous US IPO on this strongly positive measure. Snowflake, for comparison, reported around 150% at its IPO.

Of course, Anthropic adjusted the net revenue retention definition to fit its goals, counting customers who paid as little as $1 over a full year.

Conveniently, the definition includes any customer who paid $1 or more in the same quarter of the prior year, excluding Pro and Max subscribers.

Because of that omission, the true churn rate for Pro and Max subscribers may never be known.

the craziest number in Anthropic’s IPO filing isn’t the revenue

it’s 900% net revenue retention

companies that paid them $100 last year are paying ~$900 now https://t.co/8v7c34u6pb

— shirish (@shiri_shh) October 26, 2026

Another metric is anticipated but not yet realized. Anthropic aims to raise $100 billion from its IPO sale. Achieving that would surpass the $86.3 billion in stock that SpaceX sold, including underwriter purchases.

Some private companies have raised more outside public markets — for instance, OpenAI's $122 billion round in March — but $100 billion would be the biggest IPO proceeds ever.

Some of Anthropic's other disclosures resist easy comparison.

Revenue jumped from $41 million in 2023 to $16.3 billion in H1 2026. This likely represents the biggest nominal revenue increase relative to its IPO starting point, though percentage growth rates have been larger for some earlier IPOs starting from different bases.

Anthropic also claimed that "Claude has experienced the fastest enterprise adoption of any technology in history." While Claude is indeed very popular, the company left the supporting revenue figure blank for that assertion, making verification impossible for Protos.

Impressive as some numbers are, the prospectus cautions against extrapolating.

Anthropic's lawyers stated, "We do not expect our revenue will continue to grow at comparable rates, and we cannot assure you that it will continue to grow at all."