Private Market View

Lightmatter

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

PA Mark · $/share
$82
Sep 2026
Implied valuation
$4.6B
Total raised
$822.5M
Last round
Later Stage VC (Series D)
Dec 2025

Key facts

as of Sep 2026
  • Lightmatter is valued at approximately $4.6B (~$82/share) as of Sep 2026, per Private Market View’s composite mark.
  • It has raised $822.5M across 11 recorded rounds; the latest was Later Stage VC (Series D) in Dec 2025.
  • Notable investors include Sequoia Capital, Fidelity Management & Research Company, Matrix, Spark Capital, Viking Global Investors — 42 tracked in total.
  • 4 institutional filers report fund marks on Lightmatter across 114 filings.
  • Private Market View tracks 11 recorded secondary trades in Lightmatter shares.
  • Lightmatter has filed 2 Form Ds with the SEC since 2019, most recently Oct 2024 ($350.0M sold to 43 investors).
  • Status: Privately Held (backing).
PA Mark — composite indicative price
LOW confidence
~$82per share
implies $4.6B valuation · as of Sep 2026 · the exact daily mark is a member feature
Composed from 7 inputs:3rd-party trades 60%N-PORT marks 40%
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  • ·Post-money valuations for all 11 rounds
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Recorded secondary trades

11 on record · Dec 2025 – Jun 2026

11 trades between Dec 2025 and Jun 2026. Exact dates, prices and structures are available to Pro members.

Dec 2025peak 2 prints / monthJun 2026
Counts and months are public. The prints are the product.Unlock 11 trade prints

Institutional fund marks

4 filers · latest Jun 2026

4 SEC-registered funds reported 114 fair-value marks on Lightmatter between Apr 2025 and Jun 2026. Filer-level marks and implied $/share are available to Pro members.

Unlock 114 fund marks

Funding rounds

11 rounds
Dec 2025Later Stage VC (Series D)—▮
Jan 2025Secondary Transaction - Private—▮
Oct 2024Later Stage VC (Series D)$400.0M▮
Dec 2023Later Stage VC (Series C2)$155.0M▮
Mar 2023Later Stage VC (Series C1)$153.3M▮
Full funding history →

Leadership

About Lightmatter

Developer of photonic computing and interconnect hardware designed for high-performance data processing and communication in AI infrastructure. The company's platform combines silicon photonics, 3D-stacked optical interposers, co-packaged optics, and high-bandwidth optical engines that move data using light rather than electrons, enabling hyperscale data center operators, cloud providers, and AI system designers to scale compute clusters with greater bandwidth density, improved energy efficiency, and reduced interconnect bottlenecks for advanced artificial intelligence and high-performance workloads.

Industry
Application Specific Semiconductors
Sector
Hardware
HQ
Mountain View, CA, United States
Founded
2017
Employees
295
Ownership
Privately Held (backing)