Key insights
- Several major tech companies, including AI firms Anthropic and OpenAI, are reportedly preparing for significant IPOs, potentially becoming some of the largest listings ever. SpaceX is also aiming for a record-breaking IPO. While these events signal strong investor appetite for growth companies, particularly in AI, the sheer volume and size of these offerings could also indicate a potential market peak or a shift in capital allocation away from other sectors.

June 1 (Reuters) - Anthropic said on Monday it has confidentially filed for a U.S. initial public offering, as the Claude chatbot maker races with arch rival OpenAI to go public in what would be one of the biggest IPOs of all time.
The move comes ahead of SpaceX’s mega IPO, which is set to rewrite the record books as the Elon Musk-led company pursues a $1.75 trillion valuation.
If SpaceX raises the $75 billion it wants, the IPO would eclipse the world’s largest to date, which was oil major Saudi Aramco’s listing in 2019.
ChatGPT-maker OpenAI is also preparing to confidentially file for a U.S. initial public offering in the coming weeks, Reuters had reported in May, citing a source familiar with the matter.
Here is an overview of the biggest IPOs globally, ranked by deal size:
Company Offer date Sector Deal size
Saudi Aramco 12/05/19 Energy $25.6 billion
Alibaba 09/18/14 Technology $21.8 billion
SoftBank Corp 12/10/18 Communication $21.3 billion
Services
NTT Mobile 10/22/98 Communication $18.1 billion
Services
Visa 03/18/08 Financials $17.9 billion
AIA 10/21/10 Financials $17.8 billion
ENEL SpA 11/01/99 Utilities $16.5 billion
Meta 05/17/12 Technology $16 billion
General Motors 11/17/10 Consumer $15.8 billion
Discretionary
ICBC - H 10/20/06 Financials $13.96 billion
Source: Renaissance Capital
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