Funding record · 2026 / 02
Nucleus Security raises $20M Series C for threat & vulnerability management
Announced 11 February 2026 · Recorded 8 September 2026 · Last verified 8 September 2026
Nucleus Security, a threat & vulnerability management company based in Sarasota, United States, raised $20M in a Series C announced on 11 February 2026, led by Delta-V Capital, Lead Edge Capital and Arthur Ventures. Its disclosed equity funding is now $86.1M across 5 rounds.
- Amount
- $20M
- Round
- Series C
- Announced
- 11 February 2026
- Lead investors
- Delta-V Capital, Lead Edge Capital, Arthur Ventures
- Sources on record
- 1nucleussec.com
From the source
Nucleus Security Secures $20M Series C Funding
Nucleus Security announced a $20M Series C funding round to accelerate growth in unified vulnerability and exposure management.
nucleussec.com · 11 February 2026 ↗The Mandos read
What the record says about Nucleus Security
- Momentum 53 / 100 · Steadylocked →
pillars in the platform
- 123 employees · up 3% last month · 4 open roleslocked →
history and breakdowns in the platform
- Exit Readiness: Lowlocked →
Tested against 751 past exits in the Mandos record: 43% sat in Watch or Elevated 2 years before. Companies in Elevated exited at 3.1× the record's rate.
- Buyers most often compare Nucleus Security with Airrived, ThreatDown by Malwarebytes and Seconize and 1 morelocked →
the full set in the platform
Funding history
Nucleus Security funding on record
Nucleus Security has raised $86.1M in priced equity. Its most recent round was a Series C in February 2026.
Latest round on record: Series C, Feb 2026.
Nucleus Security funding on the profile →Related rounds
Other verified cybersecurity rounds
Also in Feb 2026
Most recent five, same month
In the platform
The round is the fact. The read is the product.
Every round, investor and correction for Nucleus Security, the competitors buyers weigh it against, hiring by department, and an alert when the next thing happens.
The same record answers in Claude, ChatGPT and Cursor through the Mandos MCP server.
The Mandos Brief
Cybersecurity funding, deals and moves, every Monday.
FAQ
Questions people ask
- How much did Nucleus Security raise in its Series C?
- Nucleus Security raised $20M in a Series C announced on 11 February 2026.
- Who invested in Nucleus Security's Series C?
- The round was led by Delta-V Capital, Lead Edge Capital, Arthur Ventures.
- What does Nucleus Security do?
- Nucleus Security is a cybersecurity company specializing in Threat & Vulnerability Management, founded in 2018 and headquartered in Sarasota, United States.
