Anthropic completes 1-for-1,000 reverse stock split of Class T shares

Anthropic has completed a 1-for-1,000 reverse stock split of its Class T common stock. The move covers both the authorized and the issued shares in that class.

Class T is the stock tied to the body that helps decide who sits on Anthropic’s board.

What actually happened

A reverse split is a stock split run backwards. Instead of turning one share into many, it turns many shares into one.

Here, every 1,000 Class T shares became a single share. The total number of shares shrinks dramatically, and the value attached to each remaining share rises by the same factor.

The same logic applies to ownership. A reverse split does not change anyone’s percentage stake in the company. Holders end up with fewer shares, but their slice of the pie stays the same size.

The split applies to Anthropic’s authorized Class T shares as well as the ones already issued. Authorized shares are the ceiling a company sets on how many shares it can create in a given class. Shrinking both figures together keeps the class proportionate after the consolidation.

Why Class T matters

Anthropic was founded by former OpenAI executives, and it has built an unusual governance structure around itself. The centerpiece is its Long-Term Benefit Trust, or LTBT.

Class T shares are held exclusively by the LTBT. That trust has significant influence over appointing members of Anthropic’s board.

The split does not appear to reduce the trust’s influence. Because reverse splits preserve proportional ownership, the LTBT’s relative position should look the same afterward as it did before. Fewer shares, same seat at the table.

The IPO backdrop

The timing is where things get interesting. Anthropic is reportedly targeting a public market debut in November 2026.

A draft prospectus tied to those IPO preparations shows non-cash losses amounting to $80.7 billion in the first half of 2026.

The same IPO materials point to fast growth on the top line. Anthropic’s revenue reached $16.8 billion in the third quarter of 2026, a 45% increase from the prior quarter.

Anthropic was valued at approximately $968 billion as of October 2026.

The non-cash label matters here. Non-cash losses typically reflect items like stock-based compensation or accounting adjustments, rather than money physically leaving the bank account.

What this means

For prospective IPO investors, the reverse split is less a financial event than a structural one. It does not change the company’s revenue, its losses, or anyone’s ownership percentage.

What it does is clean up the share class most closely linked to governance before Anthropic opens its doors to public shareholders. Anthropic has not detailed its specific reasoning.

The bigger question for public investors will be the LTBT itself. Buyers of Anthropic stock would be purchasing into a company where a trust holding a dedicated share class wields significant sway over board appointments.

Anthropic’s version is distinctive because the control sits with a trust built around long-term goals rather than with an individual founder.

Quarterly revenue of $16.8 billion growing at 45% is the kind of number that gets bankers excited. A first-half loss of $80.7 billion is the kind that makes risk committees reach for a second coffee.

A valuation of approximately $968 billion leaves little room for disappointment on growth.

In the near term, the things to monitor are the final IPO filing, any further changes to the share structure, and how the LTBT’s role is described to public investors. The reverse split itself is a small mechanical step. The governance model it touches will be one of the defining questions of Anthropic’s market debut.