Feed/Companies/Lightmatter

Lightmatter

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.

BUILT ON

Visit site

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

lightmatter.coLinkedInMountain View, California

LATEST ROUND

Series D

$400M · 2024-10-16

RAISED ON RECORD · USD

$555M

across 2 verified rounds

INVESTORS

3 leads

SOURCES

from 3 publishers

Feed/Companies

Company

Every round on record, with the sources behind each and the investors on them.

BUILT ON

Series D

$400M · 2024-10-16

at $4.4 billion valuation

[ HISTORY ]

led by T. Rowe Price

Series CSeries C-2

$155M · 2023-05-31

at over $1.2B valuation

[ HISTORY ]

led by Viking Global Investors, GV (Google Ventures)

Round	Amount	Announced	Lead	Buzz
Series D [ HISTORY ]: An earlier round, from the company's own announcement, found while researching the company. Checked like any round, but not new, so it stays out of the daily feed and alerts; a date range shows it.	$400M at $4.4 billion valuation	2024-10-16	T. Rowe Price	No recent discussion
1 source [ VERIFIED ] read against 1 source The source also reports $850 million in total funding since inception, which is not a financing total for this Series D round. Published by hand (reuters.com): "Oct 16 - Lightmatter, a Mountain View, California-headquartered startup building photonic tech in datacenter networking chips, said on Wednesday it has raised $400 million in a Series D funding round at a valuation of $4.4 billion.": brand backfill: the cited page states the round's $400 million

Lightmatter

Company

Rounds

Sources

Profile

Investors

Lightmatter

Rounds

Profile

Sources

Series D$400M2024-10-161 source

Series C$155M2023-05-312 sources

Investors

Series D$400M2024-10-163 investors

Series C$155M2023-05-312 investors

Series C Series C-2 [ HISTORY ]: An earlier round, from the company's own announcement, found while researching the company. Checked like any round, but not new, so it stays out of the daily feed and alerts; a date range shows it.	$155M at over $1.2B valuation	2023-05-31	Viking Global Investors, GV (Google Ventures)	No recent discussion
2 sources [ VERIFIED ] read against 1 of 2 sources The Boston dateline is not treated as the company's headquarters. The source says Lightmatter raised over $420 million to date, which is not a financing total for this round. [ BUILT WITH ]·[ SEARCH ]found by Firecrawl search·[ SCRAPE ]2 pages read: businesswire.com, gunder.com·[ JSON ]round read into a schema, with the sentence that states it·[ VERIFY ]confirmedchecked against 1 of 2 sources·[ BRANDING ]logo and colour from the homepage