PsiQuantum
PrivateLast Round
Series E
Extension
Sep 10, 2025
Est. Valuation
$7B
Total Funding Raised
$2.36B
Company Overview
PsiQuantum operates in Frontier & Industrial Tech and is based in Palo Alto, California. Its latest recorded funding round was a Series E Extension round in September 2025.
PsiQuantum is a quantum computing company that develops utility-scale, fault-tolerant quantum computers using silicon photonics to address complex challenges in climate, finance, healthcare, and other industries.
Sector
Frontier & Industrial Tech
Verticals
Quantum Computing, Computing Hardware, Semiconductors
Business Model
B2B
Customer Profile
Government Contracts, Data as a Service, Services & Consulting
AI Layer
Infrastructure
Keywords
Price History
Caplight MarketPrice™ estimate for PsiQuantum, published with a 90-day delay.
Caplight MarketPrice™
$27.14
per share, as of July 2026
+161.4%
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.
PsiQuantum Comparables
Compare PsiQuantum with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| Xanadu Quantum Technologies Limited | 87% | |
| Quantinuum | 80% | |
| Photonic Inc | 80% |
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PsiQuantum Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Series E Extension | Sep 10, 2025 | ||||
| Series E | Mar 24, 2025 | ||||
| Strategic | Apr 29, 2024 | ||||
| Grant | Jan 31, 2023 | ||||
| Series D | Jul 27, 2021 | ||||
Series C | Nov 17, 2019 |
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Secondary Market Activity
Bids, offers, and trades by month
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Key People
Founding team and executive leadership
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PsiQuantum Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| Playground Ventures | Series A |
| Temasek | Series D, Series E, Series E Extension |
| Quantum1 Group | Series D |
| Scottish Mortgage Investment Trust | Series D |
| Playground Global | Series C, Series B, Series A |
| Founders Fund | Series C, Series B |
| Queensland Government | Strategic |
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Market signals
Structured signals derived from secondary market and firmographic data.
- Apr 30, 2026
Tan appointed to the Board of Directors.
- Apr 17, 2026
IBM joins as an inaugural anchor tenant at a new quantum computing site.
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Recent news
Latest coverage and updates
- launchesOct 29, 2026
PsiQuantum, Corp. launches its Optical Circuit Switching (OCS) technology, an 8x8-radix optical circuit switch based on low-loss silicon photonics for AI infrastructure, in California on Nov 3rd '26.
- launchesOct 29, 2026
PsiQuantum, Corp. launches its first Optical Circuit Switching (OCS) technology as an 8 x 8-radix demonstration vehicle built on a low-loss silicon photonics platform, shares samples with select prospective customers, and advances it toward commercial products on Nov 3rd '26.
- launchesOct 28, 2026
PsiQuantum, Corp. unveils its first publicly disclosed 8x8-radix Optical Circuit Switching demonstration vehicle for AI infrastructure connectivity and shares samples with selected prospective customers on Oct 28th '26.
- is_developingOct 16, 2026
PsiQuantum, Corp. is developing a photonic approach to fault-tolerant quantum computing as the Office of Strategic Capital announces a conditional $150 million loan commitment to support its U.S. manufacturing and prototyping capabilities on Oct 16th '26 in the District of Columbia.
- invests_into_assetsOct 9, 2026
PsiQuantum, Corp. would invest in critical infrastructure and equipment for constructing, testing, and validating prototype quantum systems at its 140,000-square-foot hub in California on Oct 8th '26.
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PsiQuantum 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 PsiQuantum's valuation, stock price, and market status.
Is PsiQuantum a public or private company?
PsiQuantum is a private company.
What is the current stock price of PsiQuantum?
PsiQuantum is a private company, so its shares have no public market price. Caplight tracks PsiQuantum's secondary market activity and provides MarketPrice™ estimates of its share price to Caplight users.
How much is PsiQuantum worth (valuation)?
PsiQuantum's valuation is estimated at $7.0B based on funding round data.
Can I buy PsiQuantum stock?
PsiQuantum shares may be available on secondary markets subject to transfer restrictions. Caplight facilitates secondary market transactions for accredited investors.
When was PsiQuantum's last funding round?
PsiQuantum's most recent funding round was Series E Extension on September 10, 2025.
Who are the main investors in PsiQuantum?
Key investors in PsiQuantum include Playground Ventures, Temasek, Playground Global, Founders Fund, Atomico.
Will PsiQuantum IPO soon?
No public IPO plans have been announced for PsiQuantum.
How can I track PsiQuantum secondary market activity?
Caplight tracks bids, offers, and trades in PsiQuantum's shares on secondary markets.