# Lightmatter funding rounds and investors

As of 13 Oct 2026, Lightmatter has raised $555M across 2 verified rounds on record; latest: $400 million Series D led by T. Rowe Price, announced 16 Oct 2024.

Lightmatter sells photonic chips and interconnect solutions specifically designed for AI supercomputers, targeting AI infrastructure and data centers.

Website: https://lightmatter.co  
Headquarters: Mountain View, California  
Page: https://fireround.dev/companies/lightmatter.co

## Verified rounds

| Announced | Round | Amount | Lead investors | Other investors | Sources |
| --- | --- | --- | --- | --- | --- |
| 2024-10-16 | Series D | $400 million | T. Rowe Price | Fidelity, Alphabet's GV | [reuters.com](https://www.reuters.com/technology/photonic-startup-lightmatter-raises-400-million-amid-ai-datacenter-boom-eyes-ipo-2024-10-16) |
| 2023-05-31 | Series C | $155M | Viking Global Investors, GV (Google Ventures) | none named | [businesswire.com](https://www.businesswire.com/news/home/20231219681989/en/Lightmatter-Accelerates-Growth-and-Expands-Photonic-Chip-Deployments-With-%24155M-in-New-Funding-Now-Valued-at-%241.2B), [gunder.com](https://www.gunder.com/en/news-insights/client-news/lightmatter-announces-154m-series-c) |

Source: Fireround (https://fireround.dev), an open-source funding feed. Each round is checked against the pages listed with it.