Lightmatter
LI
Lightmatter designs photonic computing hardware for AI workloads. Its products include optical AI accelerators and photonic interconnect chips for data centers. The company also provides software to map neural network models onto its hardware and integrate with existing server infrastructure.
Founded by Nicholas Harris (Founder, CEO), Darius Bunandar (Founder, Chief Scientist), Thomas Graham (Founder, Head of Machine Learning)
Blended valuation$4.9B$4.9B secondary
Valuation history
Weekly blended valuation with priced funding rounds marked on the timeline.
$5.7B
blended valuationfunding round
May 31, 2021$0Oct 5, 2026
All rounds
6 funding rounds, newest first.
| Round | Announced | Raised | Post-money |
|---|---|---|---|
| Series D | Oct 16, 2024 | $400M | $4.4B |
| Series C | Dec 19, 2023 | $155M | $1.2B |
| Series C | May 31, 2023 | $154M | $720M |
| Series B | May 6, 2021 | $80M | $240M |
| Series A | Feb 25, 2019 | $22M | $92.1M |
Join Legion to view all 6 rounds.Sign in to Legion
Investors
13 investors across all rounds.
- GVGoogle Ventures
- VGViking Global Investors
- MAMatrix
- TRT. Rowe Price
- SCSpark Capital
- FIFidelity
- HPHewlett Packard Enterprise
- ALAlphabet
- LMLockheed Martin
- TVTrajectory Ventures
Only Legion members can view the full investor roster. Sign in to Legion
Secondary market activity
Recent buy and sell interest for Lightmatter shares on the secondary market.
| Kind | Implied valuation | Price / share | Date |
|---|---|---|---|
| $4.6B | $84.48 | Oct 6, 2026 | |
| $4B | $80.23 | Oct 6, 2026 | |
| $6B | $110.00 | Sep 30, 2026 |
Invest in the private markets on Legion
Registered users see full trading activity, every investor, rankings, and live deals.
Data as of Oct 16, 2026. Valuations are estimates blended from primary and secondary-market signals — not investment advice.