Lightmatter: $12.5B valuation, IPO Readiness 72, Public. Filed S-1 with the SEC on April 2026 — IPO actively in progress. Track live on The IPO Stack.
Photonic computing company building silicon photonics chips and interconnects for AI data centers. Series D ($400M, $4.4B valuation, Oct 2024). CEO Nick Harris called it "probably our last private funding round" — IPO timeline uncertain but expected post-2026.
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Lightmatter is already a public company.
Lightmatter is valued at $12.5B as of the most recent funding round. This valuation is based on its most recent private funding round tracked by TechStackIPO.
Lightmatter is already a public company. You can invest by purchasing shares on public stock exchanges.
Lightmatter scores 72/100 (Grade: B) on TechStackIPO's IPO Readiness Index. The score evaluates funding scale, valuation trajectory, funding momentum, stage progression, and company maturity. Scores above 70 indicate strong near-term IPO potential.
Yes — Lightmatter filed an S-1 registration statement with the SEC on April 12, 2026, indicating an active IPO process.
Lightmatter has raised $2.05B in total venture capital and private equity funding, with backing from T. Rowe Price, GV, Matrix Partners.
Lightmatter's notable investors include T. Rowe Price, GV, Matrix Partners. Full investor details, funding round history, and lead investor breakdowns are available on TechStackIPO.
Lightmatter is a AI Infrastructure / Semiconductors company. Photonic computing company building silicon photonics chips and interconnects for AI data centers. Series D ($400M, $4.4.