Diamond Foundry
PrivateLast Round
Grant
Dec 16, 2024
Est. Valuation
$1.8B
Total Funding Raised
$436M
Momentum
Top 1%
of companies Caplight tracks
Company Overview
Diamond Foundry operates in Frontier & Industrial Tech and is based in San Francisco, California. Its latest recorded funding round was a Grant round in December 2024.
Diamond Foundry is a materials technology company that produces lab-grown, single-crystal diamonds for the jewelry and semiconductor industries using proprietary plasma reactor technology.
Sector
Frontier & Industrial Tech
Verticals
Advanced Materials, Semiconductors, Sustainable Materials, Clean Manufacturing, Fashion & Beauty
Business Model
B2B
Customer Profile
Hardware Sales
AI Layer
Non-AI
Keywords
Price History
Caplight MarketPrice™ estimate for Diamond Foundry, published with a 90-day delay.
Caplight MarketPrice™
$68.99
per share, as of July 2026
-62.0%
2-year change
The most recent months of MarketPrice™ are available to Caplight clients.
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.
Diamond Foundry Comparables
Compare Diamond Foundry with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| Adamas One Corp. | 84% | |
| IIa Technologies | 79% | |
| Henan Liliang Diamond Co. Ltd. | 78% |
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Diamond Foundry Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Grant | Dec 16, 2024 | ||||
| Series C | Mar 29, 2021 | ||||
| Series B | Oct 1, 2018 | ||||
| Series B | Nov 12, 2015 | ||||
| Series A' | Apr 22, 2014 | ||||
Series A | Nov 5, 2012 |
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Key People
Founding team and executive leadership
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Diamond Foundry Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| Capricorn Investment Group | Series C |
| Fine Day Ventures | Series B |
| Vast Ventures | Series B |
| European Commission | Grant |
| Government of Spain | Grant |
| Fidelity Management & Research Company | Series C |
| Obvious Ventures | Series B |
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Market signals
Structured signals derived from secondary market and firmographic data.
- Nov 9, 2026
Developing a $2.77 billion factory in Spain linked to the EU Chips Act.
- Nov 6, 2026
CEO spoke at the CarbonSemi 2026 conference in China.
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Recent news
Latest coverage and updates
- invests_into_assetsNov 9, 2026
Diamond Foundry Inc. develops a $2.77B factory in Spain linked to the EU Chips Act.
- expands_facilitiesNov 9, 2026
Diamond Foundry develops a semiconductor manufacturing operation in Spain with planned investment totaling €2.35 billion by 2029, including €752 million from Spain’s state-owned technology investment body.
- attends_eventNov 6, 2026
Diamond Foundry attends CarbonSemi 2026 through a keynote by its CEO, delivered by video in China.
- launchesNov 6, 2026
On Nov 6th '26 in California, Diamond Foundry Inc. announces the creation of the first-ever D200mm single-crystal diamond, advancing diamond as a technology material at semiconductor-relevant scale.
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Diamond Foundry 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.
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Frequently Asked Questions
Common questions about Diamond Foundry's valuation, stock price, and market status.
Is Diamond Foundry a public or private company?
Diamond Foundry is a private company.
What is the current stock price of Diamond Foundry?
Diamond Foundry is a private company, so its shares have no public market price. Caplight tracks Diamond Foundry's secondary market activity and provides MarketPrice™ estimates of its share price to Caplight users.
How much is Diamond Foundry worth (valuation)?
Diamond Foundry's valuation is estimated at $1.8B based on funding round data.
Can I buy Diamond Foundry stock?
Diamond Foundry shares may be available on secondary markets subject to transfer restrictions. Caplight facilitates secondary market transactions for accredited investors.
When was Diamond Foundry's last funding round?
Diamond Foundry's most recent funding round was Grant on December 16, 2024.
Who are the main investors in Diamond Foundry?
Key investors in Diamond Foundry include Fidelity Management & Research Company.
Will Diamond Foundry IPO soon?
No public IPO plans have been announced for Diamond Foundry.
How can I track Diamond Foundry secondary market activity?
Caplight tracks bids, offers, and trades in Diamond Foundry's shares on secondary markets.