Lightmatter

Application Specific Semiconductors · Mountain View, CA · Founded 2017 · Privately Held (backing)

Developer of photonic computing and interconnect hardware designed for high-performance data processing and communication in AI infrastructure. Lightmatter is based in Mountain View, CA and was founded in 2017. It is valued at about $4.7 billion as of Oct 2026, set by secondary market price, up 5% since its Series D in Oct 2024. It has raised $822 million across 11 recorded rounds; the latest was a Series D in Dec 2025.

PMV mark · valuation
$4.7B
Oct 2026
Secondary market · $/share
$84
Total raised
$822.5M
Last round
Later Stage VC (Series D)
Dec 2025
How much has Lightmatter raised?
$822.5Macross 11 recorded rounds · Apr 2021 – Dec 2025

Most recently, Lightmatter raised an undisclosed amount in its Later Stage VC (Series D) (Dec 2025).

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Lightmatter round by round

11 rounds
Dec 2025Later Stage VC (Series D)undisclosed▮
+ 7 more investors · free account
Jan 2025Secondary Transaction - Privateundisclosed▮
+ 2 more investors · free account
Oct 2024Later Stage VC (Series D)$400.0M▮
+ 1 more investors · free account
Dec 2023Later Stage VC (Series C2)$155.0M▮
17 investors participated
Mar 2023Later Stage VC (Series C1)$153.3M▮
7 investors participated
Apr 2021Early Stage VC (Series B)$80.0M▮
12 investors participated
+ 5 earlier rounds · a free account shows the full history

How much has Lightmatter raised?

Lightmatter has raised $822 million across 11 recorded rounds since 2017. The largest was an $80 million Series B in Apr 2021; the most recent was a Series D in Dec 2025. 6 of the rounds disclosed a post-money valuation.

Lightmatter has filed 2 Form Ds with the SEC since 2019, most recently in Oct 2024 ($350 million sold to 43 investors).

Lightmatter investors

42 investors are on record for Lightmatter, including Sequoia Capital, Fidelity Management & Research Company, Matrix and Spark Capital. By type, the record holds 16 venture capital firms, 3 asset managers and 1 family office. The Series D in Dec 2025 drew 7 investors.

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Frequently asked about Lightmatter

How much has Lightmatter raised?
Lightmatter has raised $822.5M in total across 11 recorded funding rounds.
When was Lightmatter's last funding round?
Lightmatter's most recent recorded round was Later Stage VC (Series D) in Dec 2025.