Analysis
Nothing priced today. US exchanges are closed for Labor Day, EDGAR has not taken an S-1 since Friday, and the venture wire has produced no new US round since Thursday. That is the whole tape.
It is also the starting gun. The stretch from the day after Labor Day through mid-November is consistently the densest IPO window of the year, because SEC staleness rules put a fixed clock on how long an issuer's audited financials stay usable, and nobody wants to be selling into December.
What is actually on file
Fewer names than the pipeline chatter suggests. Two companies have live, priceable documents:
- Oura -- [public S-1 filed Sept. 3](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0002133022&type=S-1&dateb=&owner=include&count=40), Nasdaq ticker OURA: revenue up 74% to $1.21 billion over nine months, 5 million paid members, offering up to $3 billion at a valuation above $16 billion.
- SB Energy -- S-1/A filed Sept. 4, Nasdaq ticker SBE: utility-scale solar and storage developer, amending an existing registration.
Everything else is a step short of one:
- Anthropic: confidential S-1 filed June 1, credit facility expanded to $15B. Sequencing, not a prospectus.
- Crusoe: Goldman Sachs and Morgan Stanley retained, $30B private mark, no filing.
- Nscale: raising $3.5B pre-IPO at a $30B cap against a $103B contract backlog.
- Kraken: co-CEO says about 80% ready for a 2026 listing.
- SambaNova: "strongly considering" a US listing against an $11B Series F mark.
Of the eight companies Crunchbase named as 2026's clearest candidates, exactly one has converted.
The honest read
A window opening is not the same as a window being used. The 2026 count is already 238 US listings, up 3.48% year over year and the highest since 2021, but that number is carried by two deals -- SpaceX's $75 billion June raise and Cerebras' $5.5 billion May debut -- whose combined proceeds likely exceed the other 236 listings put together. A busy calendar with thin mid-cap depth is the same market that has existed all year.
The specific thing that would change the read is a second AI-infrastructure name pricing at scale in the next six weeks. If Oura prices well and nothing follows it from the compute side, the fall window will have been a consumer-hardware window with an AI narrative attached.
