Nucleus Security
PrivateLast Round
Series C
Feb 11, 2026
Est. Valuation
$100M
Total Funding Raised
$86.6M
Momentum
Top 50%
of companies Caplight tracks
Company Overview
Nucleus Security is a cybersecurity company that provides a risk-based vulnerability and exposure management platform to unify asset, vulnerability, and threat data for enterprises and government agencies.
Sector
Cybersecurity
Verticals
Vulnerability Management, Cloud Security, Compliance & Risk, Workflow Automation
Business Model
B2B
Customer Profile
Subscription SaaS
AI Layer
Application
Keywords
Historical Pricing
Historical view of private secondary pricing and transaction trends.
Nucleus Security Comparables
Compare Nucleus Security with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| Zafran Security | 87% | |
| ArmorCode | 86% | |
| Brinqa | 86% |
Nucleus Security Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Series C | Feb 11, 2026 | ||||
| Corporate Funding | Aug 20, 2024 | ||||
| Series B Extension | Feb 12, 2024 | ||||
| Accelerator | Apr 19, 2023 | ||||
| Series B | Mar 23, 2022 | ||||
Series A | Mar 3, 2021 |
Key People
Founding team and executive leadership
Nucleus Security Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| Arthur Ventures | Series B, Series C, Series A, Series B Extension |
| Lead Edge Capital | Series B, Series B Extension |
| Y Combinator | Accelerator |
| Delta-v Capital | Series C |
| In-Q-Tel | Series B Extension |
| Dcode Capital | Corporate Funding |
Market signals
Structured signals derived from secondary market and firmographic data.
- Mar 26, 2026
Named Best Vulnerability Management Solution in SC Awards for second consecutive year.
- Feb 17, 2026
Received 2025 Global Transformational Innovation Leadership Recognition from Frost & Sullivan.
Recent news
Latest coverage and updates
- launchesAug 25, 2026
Nucleus Security, Inc launched Helix on Aug 25th '26.
- recognized_asAug 4, 2026
Nucleus Security, Inc recognized as finalist in both the Top InfoSec Innovator Awards and Top 25 Most Innovative Cybersecurity Companies in the World 2026 at BlackHat USA 2026 on Aug 4th '26.
- attends_eventAug 4, 2026
Nucleus Security, Inc attended event BlackHat USA 2026 on Aug 4th '26.
Nucleus Security 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 Nucleus Security's valuation, stock price, and market status.
Is Nucleus Security a public or private company?
Nucleus Security is a private company.
What is the current stock price of Nucleus Security?
Nucleus Security is a private company with no public stock price. No recent secondary market data is available.
How much is Nucleus Security worth (valuation)?
Valuation information for Nucleus Security is not publicly available.
Can I buy Nucleus Security stock?
Nucleus Security 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 Nucleus Security's last funding round?
Nucleus Security's most recent funding round was Series C on February 11, 2026.
Who are the main investors in Nucleus Security?
Key investors in Nucleus Security include Arthur Ventures, Lead Edge Capital, Y Combinator, Delta-v Capital, Dcode Capital.
Will Nucleus Security IPO soon?
No public IPO plans have been announced for Nucleus Security.
How can I track Nucleus Security secondary market activity?
Caplight tracks bids, offers, and trades for private companies. Visit https://www.caplight.com to monitor Nucleus Security's secondary market activity and sign up for updates.