OpenAI files for US IPO after Anthropic as AI giants head to public markets
OpenAI confidentially filed for a US IPO on Jun 8, joining Anthropic as AI firms move toward public markets. OpenAI gave no deal size or timing, saying an IPO may take time as private. Reuters reported OpenAI could target up to $1T valuation, possibly as early as September. OpenAI previously raised $110B at $840B valuation and said it had 900M+ weekly active users.
Microsoft’s AI platform economics could reprice if the renegotiated OpenAI partnership changes revenue share, cloud demand, or exclusivity.
Article says OpenAI renegotiated its partnership with Microsoft, enabling new partnerships and supporting Azure growth.
Near-term sentiment tailwind for MSFT tied to AI workload demand; magnitude uncertain without deal terms.
Background
OpenAI confidentially filed for a US IPO, joining Anthropic in pushing AI companies toward public markets; the article also references prior OpenAI funding, user/subscriber scale, and a Microsoft partnership renegotiation.
Why it matters
The key tradable element is the first-order confirmation of OpenAI’s IPO filing (and Anthropic’s), plus the claim that a major legal overhang from Elon Musk’s lawsuit was removed by a May jury verdict. The rest is valuation narrative and read-across to hyperscalers and AI infrastructure investors.
Market relevance
Confirms IPO momentum for two leading AI labs, likely boosting AI risk appetite while increasing focus on cloud/compute beneficiaries and AI monetization durability.
Market effects
AI IPO pipeline (OpenAI + Anthropic) may reset valuation expectations and capital allocation toward AI infrastructure and cloud workloads.
US IPO market focus; could influence US tech/AI sentiment and underwriting appetite.
Global AI investment theme; large IPOs can affect cross-border capital flows into US-listed growth tech.
Alternative perspectives
Without disclosed IPO size/terms or confirmed timing, the filing may not translate into immediate repricing; investors may wait for valuation and lockup details.
Microsoft/Amazon/Google read-through is speculative here because the article provides no renegotiation economics; legal/structure overhang is cleared, but market may still discount governance and monetization risks.
Key entities
- companyOpenAI
Confidentially filed for a US IPO; did not disclose size/terms; timeline not set.
- companyAnthropic
Confidentially filed for a US IPO; positioned as OpenAI’s major rival.
- companyMicrosoft
OpenAI renegotiated its partnership with Microsoft; article links it to Azure growth.
- personElon Musk
Sued OpenAI over nonprofit structure; May jury verdict ruled against Musk, removing an IPO overhang.


