Everything you need to know ahead of Anthropic's IPO

Anthropic's ( ANTH.PVT ) long-awaited stock market debut may be just weeks away.

The artificial intelligence startup publicly filed for its initial public offering , releasing its S-1 — the prospectus a company must file with the Securities and Exchange Commission (SEC) before selling stock to the public. That started a countdown that could end in one of the largest IPOs in history.

The company hasn't announced a date for its first day of trading, but it's aiming to debut as soon as the week of Nov. 16, according to reports from the Wall Street Journal and Reuters.

Before its stock can begin trading, Wall Street bankers have to complete an investor roadshow, set a price, and receive a final green light from regulators. This page will be updated as more information comes in.

Anthropic IPO: What we know

• Official IPO date:Not confirmed

  • Earliest date price can be set:Nov. 13, 2026

  • Earliest possible IPO: Nov. 16, 2026

• Stock ticker symbol:ANT

• Exchange: Nasdaq Global Select Market (Class A)

FAQS

When could the roadshow begin?

Under SEC rules, the earliest Anthropic could start trading is Monday, Nov. 16, according to Yahoo Finance calculations. Based on SpaceX's ( SPCX ) path to public markets set in June that went from public filing to first trade in 23 days, Anthropic would debut on Wednesday, Nov. 18.

Companies that let the SEC review a draft of their IPO paperwork in private must make it public at least 15 calendar days before starting their formal roadshow — the meetings where bankers pitch the stock to big investors and take orders. With Anthropic's filing public on Oct. 26, marketing could begin as soon as Nov. 10.

After that, the fastest path runs into a holiday. The SEC is closed for Veterans Day on Nov. 11, and its rules require two business days' notice before the agency declares a filing effective. That makes Friday, Nov. 13, the earliest Anthropic could set its price — a day bankers rarely use, since the stock wouldn't start trading until Monday, leaving buyers to wait out the weekend.

SpaceX started its roadshow the first day it could and priced its stock a week later.

When will Anthropic set its IPO price?

The maker of Claude has yet to disclose how many shares it plans to sell or the price range for its offering.

Those details typically appear in an updated filing before the roadshow begins. The final price is usually set after investors have indicated their demand, the night before the stock starts trading.

What could change the schedule?

Many factors. Market volatility, particularly in comparable stocks already trading, and any outstanding regulatory issues could shift the timetable. The company also hasn't said how long its roadshow will last.