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 |
Aerospace and space transportation company. S-1 CONFIRMED filed May 20, 2026 (CIK 0001181412). Roadshow starts June 8, 2026. IPO target June 18–30, 2026. $75B raise at $275B valuation — largest IPO in history. Lead underwriters: Morgan Stanley, Goldman Sachs, JPMorgan. 30% retail allocation. Government contracts: NASA, DoD, Space Force. Starlink: 10M+ subscribers, $10B+ revenue.
| Industry | Aerospace & Defense |
| Stage | Public |
| IPO Status | Public |
| Valuation | ~$2.59T |
| Total Funding | $11.9B |
| Headquarters | Starbase, TX |
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Arm Holdings is valued at ~$54B. SpaceX is valued at ~$2.59T. Both figures are based on the most recent funding rounds tracked by TechStackIPO.
Arm Holdings's revenue is not publicly disclosed. SpaceX reported 15500000000 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. SpaceX is currently already public. Track both companies on TechStackIPO for S-1 filings, roadshow announcements, and IPO date updates.
Arm Holdings has raised $4.2B (SoftBank acquisition). SpaceX has raised $11.9B.
Arm Holdings operates in Semiconductors, while SpaceX operates in Aerospace & Defense.
Arm Holdings is a Semiconductors company valued at ~$54B with $4.2B (SoftBank acquisition) raised. SpaceX is a Aerospace & Defense company valued at ~$2.59T with $11.9B 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 SpaceX 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.