Global IPO Calendar: US and Europe Listings — 2026-09-15
Anthropic has reportedly selected Nasdaq for its anticipated listing, targeting a valuation of up to $2 trillion and intensifying the exchange's lead over NYSE. Meanwhile, OpenAI’s decision to rule out a 2026 IPO triggered a dip in Nasdaq futures, highlighting the market's sensitivity to mega-cap AI timelines. In Europe, French thermal solutions provider D.A.T.E. launched its IPO on Euronext Growth Paris, aiming to raise €10 million.
Global IPO Calendar: US and Europe Listings — 2026-09-15
Top developments
Anthropic Targets Nasdaq Listing with $2 Trillion Valuation
On September 13, reports emerged that AI developer Anthropic has chosen Nasdaq as the venue for its initial public offering. The listing is conditional but signals a potential valuation of up to $2 trillion, following SpaceX’s record debut on the same exchange. If confirmed, this move would further cement Nasdaq’s dominance in high-growth technology listings over NYSE

OpenAI Rules Out 2026 IPO, Pressuring Tech Futures
On September 14, OpenAI publicly ruled out a 2026 IPO, causing Nasdaq futures to drop toward 29,000. This decision adds uncertainty to an already heavily valued technology sector, where investor appetite is currently focused on other AI giants like Anthropic. The move contrasts with earlier speculation that OpenAI might join the 2026 listing wave

D.A.T.E. Launches IPO on Euronext Growth Paris
French company D.A.T.E., specializing in thermal exchange solutions for defense and deep tech, launched its IPO on Euronext Growth Paris on September 9. The company is valued at €32 million prior to the offering and aims to raise €10 million to accelerate industrial and international deployment

Holtec Nuclear Corporation Sets IPO Price Range
Holtec Nuclear Corporation announced the launch of its initial public offering with an expected price range of $15.00 to $18.00 per share. The offering includes a 30-day option for underwriters to purchase an additional 7,500,000 shares of Class A common stock, marking a significant entry for nuclear energy technology into the public markets
Local view
In Germany, financial media highlighted that while SpaceX dominated headlines, a "quiet" IPO performer doubled investors' money in the first half of 2026, outperforming the headline-grabbing listings. This analysis suggests that mid-cap and niche sector IPOs may offer better risk-adjusted returns than mega-cap tech debuts in the current cycle

Context & numbers
US IPO proceeds in 2026 have reached record levels, yet post-IPO stock performance has not kept pace, creating a divergence between fundraising success and secondary market returns. The market is currently testing investor appetite for high-valuation new stocks in September and October, with companies like Oura and Anthropic moving forward with listings

On the radar
- Anthropic Confirmation: Investors are awaiting official confirmation from Anthropic and Nasdaq regarding the venue selection and potential pricing dates for the rumored $2 trillion valuation listing.
- Euronext Index Changes: Euronext announced changes to its indices, with Interparfums and Verallia exiting the SBF indices, though no changes were made to the CAC 40 or CAC Next 20.
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