What happened: Anthropic, the AI company behind the Claude models, made its IPO paperwork public on Monday, October 26, 2026. The Form S-1 on SEC EDGAR shows a filing accepted at 9:00 AM ET (6:00 AM PT), and Anthropic's announcement says it intends to list its Class A common stock on the Nasdaq Global Select Market under the symbol "ANT." The number of shares and the price range have not yet been determined, so there is no IPO price, valuation or first trading date to report from the filing itself.

Key figures from the preliminary prospectus, as summarized by CNBC:

  • Revenue of $16.29 billion for the six months ended June 30, 2026, up 1,304% from $1.16 billion a year earlier. Full-year 2025 revenue was $4.59 billion.
  • A net loss of $80.7 billion for the first half of 2026, which the company says largely reflects non-cash charges from changes in the value of convertible notes and similar instruments as its valuation rose.
  • Goldman Sachs and Morgan Stanley lead the underwriting group, with many other banks participating.
  • A multi-class share structure: as a public benefit corporation, Anthropic describes a Class T share held by its Long-Term Benefit Trust that elects a majority of the board, and a single Class F share held by a co-founder LLC carrying 50.1% of the general voting power. Public buyers would get Class A shares with one vote each.

    • The broader market reacted too. By 9:50 AM ET, CNBC's live coverage reported chip and AI stocks higher on the filing, with Nvidia up 1.4%, Micron up 2.3%, Broadcom up 1.5% and AMD up 1.3%, while the S&P 500 was up 0.3%. The Wall Street Journal reported that the offering is expected to aim for a valuation of up to $2 trillion and to go public in November; those are press reports, not figures in the filing.

    Educational content only, not financial advice. Options involve significant risk and are not suitable for every investor.

    Why This Matters for Options Traders

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    1. There are no ANT options yet, and there won't be on day one. Listed options can only be added after a stock starts trading and meets the exchanges' eligibility standards (such as minimum share float, number of holders and price). For large IPOs, options have in recent years typically appeared within days of the debut rather than on the first day. Until then, the only ways to express a view through options are indirect ones, which is where most of the risk sits.

    2. New listings tend to carry very high implied volatility. A freshly listed stock has no trading history, so the market prices its options off expectations. When options on a high-profile IPO start trading, implied volatility (IV) is often well above that of mature large caps, and it can fall quickly as price discovery settles. Buying premium in the first days means paying for that uncertainty; if the stock calms down, IV crush can erode a long option even when the direction is right.

    3. Proxy trades have their own risks. On Monday the filing lifted semiconductor names. Traders sometimes use options on suppliers, cloud partners or AI-focused ETFs as a stand-in for a company that isn't public yet. The catch is that these stocks also respond to their own earnings, the Fed and broader tech sentiment, so the link to the IPO can be weak or break down entirely.

    4. A crowded calendar stacks catalysts. This is a busy week: the Federal Reserve announces a rate decision on Wednesday, and several megacap tech companies report earnings. When multiple events land close together, IV on tech names and index options can stay elevated, and it becomes harder to tell which event moved an option's price. Our earnings implied moves preview for the week of Oct 26 covers that calendar.

    5. Supply matters after the debut. IPOs usually come with lock-up agreements that restrict insiders from selling for a set period, and their expiration is a known date when more shares can hit the market. Once ANT trades and lists options, the final prospectus will spell out those terms, which options traders often mark on the calendar as a potential volatility event.

    Common Ways Traders Think About IPO-Related Setups (Educational)

  • Wait for the final terms. The price range, share count and lock-up terms come in an amended filing. Until then, any valuation figure is a report or an estimate.
  • Compare IV with realized movement. Once options list, compare implied volatility with how much the stock is actually moving day to day before deciding whether premium is expensive.
  • Prefer defined risk around a debut. Vertical spreads cap the maximum loss, which matters when a new stock can swing widely in its first sessions.
  • Watch liquidity. New option chains can start with wide bid-ask spreads and thin open interest; limit orders help avoid overpaying.
  • Read the governance section. Control by a trust and a founder share means public shareholders have limited say over the board, which can matter for how the stock trades on corporate news.

    • Key Takeaways

  • Anthropic publicly filed its S-1 on Oct. 26, 2026 and plans to list Class A shares on Nasdaq as "ANT"; price range and share count are not yet set.
  • The filing shows $16.29 billion of first-half 2026 revenue and an $80.7 billion net loss driven largely by non-cash valuation charges.
  • Chip stocks rose on the news Monday morning; ANT options can't trade until after the stock lists and qualifies.
  • Expect high IV on any new-listing options, and treat proxy trades and the Fed-plus-earnings week as separate sources of risk.

    • Sources

  • SEC EDGAR: Anthropic, PBC Form S-1 filing index (accepted Oct. 26, 2026)
  • SEC EDGAR: Anthropic, PBC preliminary prospectus (Form S-1)
  • Anthropic: Anthropic files S-1 with the SEC for proposed initial public offering
  • CNBC: Anthropic IPO live updates (Oct. 26, 2026)
  • CNBC: Stock market today live updates (Oct. 26, 2026)
  • Wall Street Journal: Stock market today live coverage (Oct. 26, 2026)
  • OCC: Characteristics and Risks of Standardized Options

    • By the OptionsPilot Editorial Team. Published October 26, 2026, 7:45 AM PT. This article is for education only and is not investment advice. Options involve risk and are not suitable for all investors.