OpenAI files for US IPO after Anthropic as AI giants head to public markets
OpenAI confidentially filed for a US IPO on June 8, joining Anthropic as AI companies move toward public markets. OpenAI gave no offering size or timing, saying it may take time as a private company. Reuters previously reported a valuation target up to $1 trillion and a debut as early as September. OpenAI said it raised $110 billion at an $840 billion valuation in 2026 and reported $2 billion monthly revenue.
Read-through: if OpenAI’s IPO expands capital and partnerships, hyperscaler AI spend and cloud demand expectations may shift.
The article notes OpenAI’s early backers include Amazon, and it references OpenAI’s renegotiated Microsoft partnership enabling new partnerships.
Mild-to-moderate positive bias for cloud/AI spend expectations, but not a direct contract award.
Background
OpenAI is described as filing confidentially for a US IPO after renegotiating its partnership with Microsoft; the piece also frames Anthropic’s concurrent IPO push.
Why it matters
The newest concrete development is the June 8 confidential IPO filing, plus Reuters’ reported valuation target and the claim that a prior legal overhang (Musk lawsuit) was cleared by a May jury verdict.
Market relevance
Traders can use the filing/valuation narrative to gauge AI IPO risk appetite and potential read-through to AI infrastructure and cloud demand expectations.
Market effects
Reinforces AI as the dominant equity theme and can lift sentiment for AI infrastructure/software ecosystems ahead of IPO windows.
US IPO pipeline narrative may spill into US-listed AI/semis and global tech risk appetite.
Mega-cap AI IPOs can reset global valuation benchmarks for frontier-model developers and their compute partners.
Alternative perspectives
IPO filings may not translate into near-term liquidity or pricing power; delays/terms could disappoint and cool sentiment.
The article provides no IPO size/terms and no disclosed economics of the Microsoft renegotiation, so read-through may be overstated versus fundamentals.
Key entities
- companyOpenAI
ChatGPT-maker that confidentially filed for a US IPO on June 8; Reuters reports a potential up-to-$1T valuation target.
- companyAnthropic
Rival AI developer that also filed for a US IPO, cited as part of a rapid IPO wave.
- companyMicrosoft
Early investor/partner whose relationship with OpenAI was renegotiated, enabling new partnerships.
- personElon Musk
Sued OpenAI over nonprofit mission drift; a May jury verdict ruled against Musk, removing an IPO overhang per the article.




