Lightmatter
PrivateLast Round
Series D
Oct 16, 2024
Est. Valuation
$4.4B
Total Funding Raised
$822M
Momentum
Top 10%
of companies Caplight tracks
Company Overview
Lightmatter is a semiconductor company that develops photonic computing and interconnect hardware to enhance the speed and energy efficiency of artificial intelligence infrastructure.
Sector
AI, Data & Cloud Infrastructure
Verticals
AI Training Infrastructure, Computing Hardware, Semiconductors, Cloud Infrastructure
Business Model
B2B
Customer Profile
Hardware Sales, Services & Consulting, Subscription SaaS
AI Layer
Infrastructure
Keywords
Price History
Caplight MarketPrice™ estimate for Lightmatter, published with a 90-day delay.
Caplight MarketPrice™
$73.33
per share, as of May 2026
+30.3%
8-month change
Caplight MarketPrice™ is an estimate of private secondary market pricing, shown here on a delayed basis for illustrative purposes only. It may be incomplete, is subject to change, and may not be relied upon for any purpose or considered investment advice.
Lightmatter Comparables
Compare Lightmatter with similar companies based on industry and business-model similarity.
Lightmatter Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Series D | Oct 16, 2024 | ||||
| Series C Extension | Dec 19, 2023 | ||||
| Series C | May 31, 2023 | ||||
| Series B | May 6, 2021 | ||||
| Series A Extension | Feb 26, 2019 | ||||
Series A | Feb 5, 2018 |
Secondary Market Activity
Bids, offers, and trades by month
| Operation | Date | Price | Size | Share Class | Structure |
|---|---|---|---|---|---|
OFFER | |||||
OFFER | |||||
TRADE | |||||
OFFER | |||||
OFFER | |||||
OFFER |
Lightmatter Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| Matrix | Series A Extension, Series C Extension, Series B, Series A |
| Aliya Capital Partners | Series C |
| 3F Ventures | Series C |
| The Engine | Series C Extension, Series C |
| Engine Ventures | Series C Extension, Series C |
| GV | Series C, Series B, Series D, Series A Extension, Series C Extension |
| Hewlett Packard Pathfinder | Series B |
Market signals
Structured signals derived from secondary market and firmographic data.
- Apr 25, 2026
Programs ramping to High Volume Manufacturing (HVM).
- Apr 25, 2026
Job posting reveals over 13 active hardware programs.
Recent news
Latest coverage and updates
- attends_eventSep 17, 2026
Lightmatter, Inc. attends event OCP conference.
- attends_eventSep 17, 2026
Lightmatter, Inc. attends event Open Compute Project (OCP) conference.
- attends_eventAug 12, 2026
Lightmatter, Inc. attended event OCP APAC Summit 2026 on Aug 13th '26.
- recognized_asJul 15, 2026
Lightmatter recognized as NVLink Fusion "optical interconnect partners" at COMPUTEX 2025.
- has_valuationJul 15, 2026
Lightmatter had valuation of $4.4B on Jul 1st '24.
Lightmatter Filings
Explore SEC and related filing metadata, where available.
| Type | Date | Amount Offered | Amount Sold | Filing | Pages | Download |
|---|
Filing documents are not displayed on this public page. Request access to learn about available coverage.
Request accessFrequently Asked Questions
Common questions about Lightmatter's valuation, stock price, and market status.
Is Lightmatter a public or private company?
Lightmatter is a private company.
What is the current stock price of Lightmatter?
Lightmatter is a private company with no public stock price. Caplight tracks Lightmatter's secondary market activity and provides MarketPrice™ estimates to Caplight users.
How much is Lightmatter worth (valuation)?
Lightmatter's valuation is estimated at $4.4B based on funding round data.
Can I buy Lightmatter stock?
Lightmatter shares may be available on secondary markets subject to transfer restrictions. Caplight facilitates secondary market transactions for accredited investors. Visit https://www.caplight.com to learn more.
When was Lightmatter's last funding round?
Lightmatter's most recent funding round was Series D on October 16, 2024.
Who are the main investors in Lightmatter?
Key investors in Lightmatter include Matrix, GV, T. Rowe Price, Viking Global Investors, Spark Capital.
Will Lightmatter IPO soon?
No public IPO plans have been announced for Lightmatter.
How can I track Lightmatter secondary market activity?
Caplight tracks bids, offers, and trades for private companies. Visit https://www.caplight.com to monitor Lightmatter's secondary market activity and sign up for updates.