Side-by-side IPO readiness, funding history, and valuation comparison. Data sourced by TechStackIPO.
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Semiconductor IP company designing the processor architecture in 99% of smartphones. Listed on Nasdaq (ARM) September 14, 2023 at $51/share, raising $4.87B at a ~$54B opening valuation. Backed by SoftBank.
| Industry | Semiconductors |
| Stage | Public |
| IPO Status | Public |
| Valuation | ~$54B |
| Total Funding | $4.2B (SoftBank acquisition) |
| Headquarters | Cambridge, UK |
OpenAI is valued at $920B — the world's most valuable AI company, backed by over $65B in funding. The company recently restructured as a Public Benefit Corporation to support its mission of developing safe AGI.
| Industry | Artificial Intelligence |
| Stage | Public |
| IPO Status | Public |
| Valuation | $920.0B |
| Total Funding | $65.4B |
| Headquarters | San Francisco, CA |
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Arm Holdings is valued at ~$54B. OpenAI is valued at $920.0B. Both figures are based on the most recent funding rounds tracked by TechStackIPO.
Arm Holdings's revenue is not publicly disclosed. OpenAI reported 12700000000 arr revenue in 2025. Revenue figures are sourced from TechStackIPO's company database and updated as new data becomes available.
Arm Holdings filed an S-1 in August 2023 and is actively in the IPO pipeline. OpenAI filed an S-1 in June 2026 and is actively in the IPO pipeline. Track both companies on TechStackIPO for S-1 filings, roadshow announcements, and IPO date updates.
Arm Holdings has raised $4.2B (SoftBank acquisition). OpenAI has raised $65.4B.
Arm Holdings operates in Semiconductors, while OpenAI operates in Artificial Intelligence.
Arm Holdings is a Semiconductors company valued at ~$54B with $4.2B (SoftBank acquisition) raised. OpenAI is a Artificial Intelligence company valued at $920.0B with $65.4B raised. See TechStackIPO's full side-by-side comparison for IPO readiness scores, funding timelines, and investor access options.
Accredited investors can access pre-IPO shares in Arm Holdings and OpenAI through secondary market platforms, pre-IPO funds, and broker-dealer platforms that facilitate private company transactions. TechStackIPO's marketplace section tracks available access options for both companies. Pre-IPO investments carry higher risk and limited liquidity.