Side-by-side IPO readiness, funding history, and valuation comparison. Data sourced by TechStackIPO.
Scores, valuations, and signals for OpenAI, X-Energy, and 370+ companies. 5-min read every Tuesday.
OpenAI is valued at $852B — the world's most valuable AI company, backed by $27B in funding. Track IPO readiness score, funding rounds, and timeline.
| Industry | Artificial Intelligence |
| Stage | Pre-IPO |
| IPO Status | Pre-IPO |
| Valuation | $852B |
| Total Funding | $55.4B |
| Headquarters | San Francisco, CA |
X-Energy is a nuclear energy company developing small modular reactors (SMRs) and TRISO-X fuel. Amazon-backed and DOE-funded, filed S-1 with SEC on March 20 2026 targeting $1B raise on Nasdaq under ticker XE. Partners include Talen Energy, Dow Chemical, and Centrica.
| Industry | Nuclear Energy |
| Stage | Public |
| IPO Status | Public |
| Valuation | $3.5B |
| Total Funding | $1B+ |
| Headquarters | Rockville, MD |
OpenAI is valued at $852B. X-Energy is valued at $3.5B. Both valuations are based on the most recent private funding rounds tracked by TechStackIPO.
OpenAI has raised $55.4B. X-Energy has raised $1B+.
OpenAI is currently pre-IPO. X-Energy is currently already public. Track both on TechStackIPO for S-1 filings and IPO announcements.
OpenAI operates in Artificial Intelligence, while X-Energy operates in Nuclear Energy.
OpenAI is a Artificial Intelligence company valued at $852B with $55.4B raised. X-Energy is a Nuclear Energy company valued at $3.5B with $1B+ raised. See TechStackIPO's full side-by-side comparison for IPO readiness scores, funding timelines, and investor data.
Accredited investors can access pre-IPO shares in OpenAI and X-Energy 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.