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™
$100.42
per share, as of June 2026
+78.4%
9-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 | |||||
OFFER | |||||
OFFER | |||||
TRADE | |||||
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
- partners_withOct 14, 2026
Lightmatter, Inc. partners with Senko to promote high-density fiber optic connectivity and detachable optical interface technology, improving the mass production and maintenance of CPO systems, on Oct 14th '26.
- launchesOct 13, 2026
Lightmatter, Inc. unveils Passage(R) co-packaged optics (CPO), Guide(R) DR external laser modules and vClick(TM) Optics in California on Oct 12th '26
- partners_withOct 13, 2026
Lightmatter, Inc. and Flex Ltd collaborate on a 204.8 Tbps CPO switch tray as a production validation platform for Open Compute Project specifications in California on Oct 12th '26.
- attends_eventOct 13, 2026
Lightmatter, Inc. attends the 2026 OCP Global Summit and unveils photonic computing systems in California on Oct 12th '26
- attends_eventSep 17, 2026
Lightmatter, Inc. plans to attend the Open Compute Project (OCP) conference and showcase rack-scale innovations
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, so its shares have no public market price. Caplight tracks Lightmatter's secondary market activity and provides MarketPrice™ estimates of its share price 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.
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, Aliya Capital Partners, GV, T. Rowe Price, Viking Global Investors.
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 in Lightmatter's shares on secondary markets.