Key Highlights

● No U.S. IPO priced or made its trading debut on Tuesday, September 29, 2026, and Oura postponed its planned listing.

● A reported leaked Anthropic prospectus points to a valuation target above $2 trillion, 12-fold revenue growth and $518 billion obligations.

● OpenAI is reportedly targeting a $1.4 trillion valuation with an annualized revenue run rate approaching $70 billion.

● The 30-year Treasury yield reached its highest level since 2002, and consumer confidence fell to 81.9, its lowest since 2014.

The U.S. market for initial public offerings went quiet on Tuesday, September 29, 2026. No U.S. IPO priced or made its trading debut during the session. Instead, the IPO story was shaped by one company stepping back and another reportedly getting ready to step forward. Smart-ring maker Oura postponed its planned listing, citing market uncertainty, while a leaked prospectus for Anthropic, the artificial intelligence developer, dominated headlines, pointing to a valuation target above $2 trillion.

A Reported Blockbuster in Waiting

The reported Anthropic filing grabbed attention for its sheer scale. The prospectus reportedly shows 12-fold revenue growth in 2025 and $518 billion of planned compute and infrastructure obligations. It also reportedly warns of existential risk to humanity, a striking disclosure in a document meant to attract investors.

Market strategists focused on the growth numbers, with one saying the acceleration of the business is the biggest part of the release and another saying stellar revenue growth is what is capturing the market's attention. A midday market headline summed up the mood: stocks edge lower despite a $2 trillion Anthropic valuation. OpenAI is reportedly targeting a $1.4 trillion valuation with an annualized revenue run rate approaching $70 billion.

Why the Timing Is Tricky

Companies prefer to go public when markets are calm and investors are eager. Tuesday's backdrop was mixed at best. The S&P 500 closed at 7,670.84, down 12.85 points, and the Dow Jones Industrial Average closed at 51,349.92, down 131.59 points. The Nasdaq Composite ended little changed at 26,797.54. It was the fifth loss in six sessions for the three major indexes.

The 30-year Treasury yield reached its highest level since 2002, and the 10-year touched its highest in roughly two decades. Higher yields tend to weigh most on richly valued growth companies, exactly the kind that often come to market through IPOs. The Shiller CAPE valuation measure has not been this high since 1999, and consumer confidence fell to 81.9 in September from 88.6 in August, its lowest reading since 2014 and below the 89.2 forecast.

Recent Debuts Still Offer Signals

The window has not been shut. ADARx Pharmaceuticals made its Nasdaq debut on September 25 and jumped sharply on its first day of trading. SpaceX, which recently listed, remains a closely watched newcomer, and its shares wavered on Tuesday, with sources differing on direction, after a Starship flight reached orbit but made two orbits instead of the six planned because of engine problems.

The Calendar for New Issues

The near-term calendar is packed with data that could shape the mood for new issues. Wednesday, September 30, brings quarter-end, the government's third estimate of GDP and August PCE inflation. Micron reports fiscal fourth-quarter results the same day, a key read on AI demand. Nike reports on Thursday, October 1, and the September jobs report arrives on Friday, October 2, with economists expecting about 95,000 new jobs. The Federal Reserve's next policy meeting is October 27 to 28.

The Clearest Signal to Watch

Any formal public filing from Anthropic, or a new date from Oura, would be the clearest signal of where the IPO window stands.