Lightmatter key facts
as of Oct 2026- Developer of photonic computing and interconnect hardware designed for high-performance data processing and communication in AI infrastructure.
- Lightmatter is valued at approximately $4.7B (~$84/share on the secondary market) as of Oct 2026, up 5% since its Series D, Oct 2024, per PrivateMarketView’s 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 126 filings.
- PrivateMarketView 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).
Up 5% since its Series D, Oct 2024 ($4.5B post-money).
Membership and data by Private Market View
- ·Post-money valuations for 6 rounds
- ·The complete investor list: 42 names
- ·Watch Lightmatter: the Monday email on marks, rounds and moves
Secondary market
monthly marks · 46 months · Jan 2023 – Oct 2026Membership and data by Private Market View
Lightmatter secondary trades
11 on record · Dec 2025 – Jun 202611 trades between Dec 2025 and Jun 2026. Exact dates, prices and structures are available to Pro members.
Membership and data by Private Market View
Institutional fund marks on Lightmatter
4 filers · latest Jul 20264 SEC-registered funds reported 126 fair-value marks on Lightmatter between Apr 2025 and Jul 2026. Filer-level marks and implied $/share are available to Pro members.
Membership and data by Private Market View
Lightmatter funding rounds
11 roundsLightmatter leadership
- Nicholas Harris Ph.DCo-Founder, Chief Executive Officer, President & Board Member
- Simona Jankowski JDChief Financial Officer
- Darius Bunandar Ph.DCo-Founder, Chief Scientist & Board Member
- Thomas GrahamCo-Founder & Head of Machine Learning
Who backs Lightmatter
42+Membership and data by Private Market View
Lightmatter valuation
Lightmatter is valued at approximately $4.7 billion as of Oct 2026. The figure is set by secondary market price and confirmed by prints and round price. The secondary market quotes about $84 per share. The reference point is its Series D in Oct 2024, at a $4.5 billion post-money valuation; the current figure is up 5% since.
Lightmatter ranks 36th by valuation and 48th by capital raised among the private companies PrivateMarketView tracks.
Recent activity
In the last 90 days, Lightmatter's record added 12 institutional fund marks (latest period Jul 2026).
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 secondary market activity
11 secondary trades in Lightmatter shares are on record, between Dec 2025 and Jun 2026. Exact dates, prices and structures are available to Pro members.
A monthly secondary-market price series for Lightmatter runs from Jan 2023 to Oct 2026 (46 months).
Institutional holders and vehicles
4 SEC-registered funds reported 126 fair-value marks on Lightmatter between Apr 2025 and Jul 2026, in their N-PORT filings. Filer-level marks and implied per-share values are available to Pro members.
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.
Who runs Lightmatter
13 people are listed on the Lightmatter team: 4 executives and 9 board members, including Darius Bunandar Ph.D (Co-Founder) and Nicholas Harris Ph.D (Co-Founder). 13 of them have a verified direct contact on file.
Comparable companies
Comparable application specific semiconductors names by valuation on PrivateMarketView: Positron ($5 billion), SiFive ($3.6 billion) and Tenstorrent ($3.2 billion).
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
- Website
- lightmatter.co/
- Ownership
- Privately Held (backing)
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