Anthropic IPO Date vs First Trading Day: How ANT Opens

Anthropic's IPO date and its first trading day aren't the same thing, even though reports use "IPO date" for both. Two separate steps set the IPO price and the first trading price. Anthropic and its banks fix the offering price first, usually the evening before trading. Then Nasdaq opens ANT through its IPO process. The opening price comes from buy and sell orders rather than from the IPO price. Anthropic hasn't set either date yet.

Is the Anthropic first trading day the same as the IPO date?

Not always. Anthropic prices the offering first, then files the final prospectus with that price within two business days. Trading starts afterward, once the lead bank tells Nasdaq the stock is ready. In most large deals, pricing happens in the evening and the first trade comes the next day. That's what SpaceX did in June 2026: priced on Thursday June 11, first trade on Friday June 12.

So a report that says "IPO date" can mean either the pricing or the first trade.

Who sets the IPO price?

Anthropic and its banks, led by Goldman Sachs and Morgan Stanley. During the roadshow, the banks take orders from investors – how many shares each wants, and at what price. The company and the banks then decide where to set the offering price. The SEC's investor guide says the same: "The company and the underwriters make the decision on where to set the offering price."

The investors who get shares at that price are the ones the banks allocate them to. Everyone else waits for the market.

How does Nasdaq set the first trading price of ANT?

Through a dedicated opening process for IPOs, set out in Nasdaq Rule 4120(b)(4)(C). It runs in four stages.

1. A 10-minute display-only period. Brokers can enter orders and Nasdaq shows an indicative price, but nothing trades.
2. Notice from the lead bank that the stock is ready to trade.
3. A price check. Nasdaq calculates the expected opening price and the lead bank approves it. The system then checks the price against a tolerance the bank selected (up to $0.50 from the expected price).
4. The opening cross. Nasdaq matches all the orders in one trade, at the price that clears the largest number of shares.

The opening price can be above or below the IPO price.

Why can the first trade come well after the market opens?

Because the opening depends on the lead bank, not the clock. Orders build up during the display-only period. The cross only runs once the bank has confirmed the stock is ready and approved the price. SpaceX's first trade came at about 11:46 a.m. Eastern on June 12, 2026. It was more than two hours after the 9:30 a.m. open. Our article on SpaceX's first weeks of trading covers what happened after that.

Which price will most investors pay on day one?

The opening price or a later market price, not the IPO price. The IPO price is only available to investors who get an allocation from the banks. Our article on when retail investors can buy Anthropic stock explains how allocations work. Any fund that references the stock also can't start until the stock itself trades. Our guide to Anthropic leveraged ETFs explains how those products work and the risks that come with them.

Key takeaways

• Anthropic and its banks set the IPO price after the roadshow. Orders in Nasdaq's opening cross set the first trading price.
• The first trade can come hours after the 9:30 a.m. open. The lead bank has to confirm the stock is ready and approve the price first.
• For most investors, the IPO price is a marker. They buy at the market price.

Sources

• Anthropic, PBC, Form S-1, SEC EDGAR, October 26, 2026
• Investor.gov, Investor Bulletin: Initial Public Offerings, October 14, 2022
• SEC Rule 424 (final prospectus filing)
• Nasdaq Equity Rule 4120(b)(4)(C) (IPO halt and release for trading)
• Nasdaq, IPO Cross fact sheet
• TechCrunch, SpaceX officially prices shares at $135 in the largest IPO ever, June 11, 2026
• Yahoo Finance, SpaceX stock has begun trading on the Nasdaq, June 12, 2026