IPO Desk

Anthropic, PBCANT

Public S-1 filed Oct 26, 2026 · Nasdaq · share count and price not yet set

Prospectus public: Oct 26, 2026
Exchange: Nasdaq
Terms: Share count and price range not yet set

Calendar data: Finnhub, refreshed nightly. Verify terms against the prospectus on SEC EDGAR — the prospectus is the primary source.

The filing · S-1 · Oct 26, 2026

Public S-1 filed 2026-10-26 for a Nasdaq Global Select listing as "ANT"; share count and price range are not set. Revenue $16.3B in the first half of 2026, operating income positive in Q2.

Registrant: Anthropic, PBC — a public benefit corporation (CIK 0002130357); S-1 cover
Filing: Form S-1 filed 2026-10-26 (accession 0001628280-26-067168); confidential drafts since 2026-06-01; SEC EDGAR filing index
Proposed listing: Nasdaq Global Select Market, symbol "ANT"; Goldman Sachs and Morgan Stanley lead; S-1 cover
Terms: Share count and price range not yet set; S-1 cover
Revenue: $4,585M in 2025; $16,286M in the first half of 2026 ($11,555M in Q2 2026); S-1, summary financial data
Operating result: Q2 2026 operating income +$974M; first-half 2026 operating cash flow +$3,929M; S-1, summary financial data
Cash: $112.4B at 2026-06-30; S-1, balance sheet
Net loss: $80.7B in the first half of 2026, of which $72.4B is the fair-value change on convertible notes and SAFEs; S-1, results of operations
Customers: More than 11,900 customers above $100K trailing-twelve-month; top five about 25% of revenue; S-1, business
Run-Rate Revenue: Left blank in this filing (as of 2026-10-31); S-1, summary
Control: "Controlled company": the Long-Term Benefit Trust elects a board majority; Founder LLC holds Class F with 50.1% of votes; S-1, management and principal stockholders

Primary sources: Anthropic S-1 on SEC EDGAR · Anthropic filing index

The story behind it

How it got here

Anthropic filed confidential draft registration statements starting 2026-06-01 and amended them through October (July 13, August 10, September 4, October 1 and October 9). The public S-1 on 2026-10-26 is the point where the financials, holders and commitments became readable by everyone. The share count, price range and listing date arrive with a later amendment, ahead of the roadshow.

What the numbers say

Revenue was $4.6B for 2025 and $16.3B in the first six months of 2026 — $11.6B of it in the second quarter. Operating income turned positive in that quarter (+$974M). The headline $80.7B first-half net loss is mostly not operating: $72.4B is the revaluation of convertible notes and SAFEs, a non-cash line that moves with the company's own valuation. Cash was $112.4B at the end of June.

The compute behind it

The filing lists large multi-year compute arrangements: Microsoft at least $44.9B, Google at least about $114.5B on a take-or-pay basis, Amazon at least $110.0B, Broadcom leases of about $161.2B, Nscale $44.6B, Lambda $41.3B and AMD more than $20B. A SpaceX subsidiary (SpaceX.AI) is listed for up to $120.5B at about $3.1B a month, cancelable on 90 days' notice after early 2027. The filing leaves the aggregate total blank.

Who controls it

Anthropic is a public benefit corporation. A Long-Term Benefit Trust elects a majority of the board, which makes it a controlled company under exchange rules, and Founder LLC's Class F stock carries 50.1% of the votes. Public shareholders would hold a minority of the voting power.

Our early read

Our early read is about what the filing lets us read, not a rating. The operating line turned positive and the revenue base is large, but nothing a pattern engine normally reads on a listed company exists yet: no quarterly cadence, no insider-filing history, no guidance record. Until those arrive the honest output for Anthropic itself is silence; what we can read today is its footprint on companies that are already listed.

The loss is mostly a revaluation

$72.4B of the $80.7B first-half loss is a fair-value change on convertible notes and SAFEs. It reverses or disappears at conversion; the operating result (Q2 +$974M) is the line to follow.

Commitments are far larger than revenue

The listed compute arrangements run to hundreds of billions of dollars against $16.3B of first-half revenue. The business only works if usage keeps growing into them. The filing itself leaves the aggregate blank, so the total is not a number we can quote.

The suppliers carry the exposure

On filed figures, Google's equity ($10.0B), undrawn credit ($20.0B) and cloud commitment ($114.5B) add up to $144.5B, about 36% of Alphabet's 2025 revenue; our registry reads that at the middle exposure tier. Amazon and Microsoft are already at the top tier on their own disclosures.

A cancelable contract is not backlog

The SpaceX.AI arrangement (up to $120.5B) can be cancelled on 90 days' notice after early 2027. We do not count it as firm backlog on either side.

The market-size claim is one number

The filing cites a single "$40 trillion" of knowledge-worker economic value with no sized breakdown. Our IPO-TAM check needs a stated total with named, dollar-sized sub-categories, so it stays silent here.

Voting power is concentrated

A controlled company with a trust-elected board majority and a 50.1% founder vote means public holders have limited say. That is a structural fact to price in, not a verdict.

What to watch

The amended S-1 that sets the share count, price range and date
Run-Rate Revenue and the committed-spend total, both left blank today
The SpaceX.AI cancellation window opening in early 2027
Lockup terms and the number of selling stockholders
The first 10-Q after listing, which starts the quarterly record

Education, not investment advice. Figures are as filed in the S-1 on 2026-10-26 and can change in amendments; the prospectus on SEC EDGAR is the primary source.

What the pattern engine reads today: nothing — by design.

Contra reads its full pattern library against filings, insider activity, and market structure. A company with a public S-1 has one document on the record — audited financials, holders and lockup terms — but no quarterly filings and no insider-filing history yet, so there is nothing to read a pattern against. Each stage below adds something readable. That is the difference between a date you can verify and a story you can’t.

When it becomes readable

Oct 26, 2026

Prospectus public on EDGAR

The Form S-1 is on the public record: audited financials, cash and commitments, who owns what, the lockup terms and the risk factors. This is the first falsifiable material — read it before any coverage of it.

TBD

Share count and price range set

An amended S-1 names the number of shares, the price range and the selling stockholders, and opens the roadshow. Until then the offering has no size and no valuation on the record — only reporting.

TBD

Pricing and first trade

Price and share count are set at the end of the roadshow; trading starts the next day. Timing depends on market conditions and the company's choice.

What usually happens — the base rates

First-day pops are the norm, not a signal

The average US IPO has closed its first day about 18% above the offer price across 1980–2023 (Ritter, University of Florida IPO statistics). The pop reflects deliberate underpricing and attention — it says nothing new about the business.

Attention buying costs retail money

Individual investors are net buyers of attention-grabbing stocks — names in the news, with extreme volume or extreme one-day returns — and that buying pattern predicts underperformance (Barber & Odean, 'All That Glitters', 2008). IPOs are the single most attention-concentrated event in markets.

The class lags for years

IPOs as a group have underperformed size-matched peers over the three years after listing (Ritter 1991, confirmed in updated samples through 2023). The lag concentrates in smaller and unprofitable issuers — the kind retail buys most eagerly.

Lockup expiry is a supply event with a date

When the (typically 180-day) lockup ends, insiders can sell for the first time. Expiry weeks have historically run ~1.5% below market with a permanent ~40% volume increase (Field & Hanka 2001). It is on the calendar from day one.

The first analyst wave is mechanical

Underwriters' analysts must wait 10 calendar days before publishing (FINRA Rule 2241). Coverage then arrives in a cluster and skews positive (Bradley, Jordan & Ritter 2003) — initiation-day enthusiasm is a schedule, not a discovery.

Historical base rates from published academic research, cited inline. Education, not investment advice.

See what the engine reads — and when it stays silent.

Every morning, Contra reads the stock, commodity, and bond markets for the patterns that move retail returns — and says “no view” when there’s nothing to read, which is the honest answer on most IPO day-ones.