United States · Series D startup
3 rounds we have observed, with the 7 investors named in them. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.
Valuation: $4.4B, Mar 2026
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Funding summaryUpdated 5 Nov 2026
$433Mraised across 3 rounds since 2018, from 7 sources
Each circle is a round, placed by date and sized by amount. The line above is the running total.
Reported by Crunchbase News and 4 othersSEC filing: $350M sold, first sale Oct 2024
Lightmatter filed one raise, $350M in all. Filings say how much was sold and to how many investors; they never name the investors.
From Lightmatter's own website: 6 on the team.
The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.
T. Rowe PriceL
Google Ventures
Spark Capital
Matrix Partners
Fidelity
SparkGV/ MatrixMissing a round, or an investor who was in one? Tell us.
These 9 firms list Lightmatter as a portfolio company on their own websites, but no report of a round names them. They are the firms' own claims, kept apart from the rounds above.
Lightmatter's investors include T. Rowe Price, Google Ventures, Spark Capital, Matrix Partners and Fidelity, and 2 more on record. T. Rowe Price led its latest round.
Lightmatter has raised $433M across 3 rounds since 2018.
Lightmatter's most recent round was a Series D of $400M in Oct 2024, led by T. Rowe Price.
Its most recent round, $400M in Oct 2024, is also its largest on record.
Lightmatter's first round on record, in Feb 2018, was backed by Spark Capital and Matrix Partners.
Lightmatter's latest named round is a Series D, in Oct 2024.
Lightmatter is based in the United States.
T. Rowe Price led the Series D in 2024.
In the same sector, and raised in the last eighteen months.
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United States · 
