# Nucleus Security funding: rounds and investors

> Nucleus Security has raised $20M across 1 round since 2026. Investors include In-Q-Tel and Arthur Ventures. Every round with its source.

Source: https://millionrounds.com/company/nucleus-security (Millionrounds; every figure on the page links to its filing or article)

United States · [Series C startup](https://millionrounds.com/companies)

# Who invested in *Nucleus Security*

One round we have observed, with the 2 investors named in it. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.

Cybersecurity

Raised 9 months ago

Funding summary Updated 26 Oct 2026

**$20M** raised across 1 round since 2026, from 1 source

- **Latest round:** Series C, $20M Feb 2026
- **Investors:** 2

See who backed them

## The rounds

- **Feb 2026** Series C **$20M** [In-Q-Tel](https://millionrounds.com/fund/iqt) [Arthur Ventures](https://millionrounds.com/fund/arthur-ventures) Source recorded

## Founders and team

From Nucleus Security's own website and the SEC filings it signed: 1 founder, 5 on the team.

**Steve Carter** Co-founder, CEO

- **Kunal Desai** CFO
- **Scott Underwood** Chief Customer Officer
- **Will Gorman** CTO
- **Adam Dudley** VP of Strategy and Alliances
- **Stephen Carter** Executive Officer, Director i

On the board, as filed i *Avery Rosin* *Michael Nixon* *Ryan Kruizenga*

## Everyone who backed them

[In-Q-Tel](https://millionrounds.com/fund/iqt) Accelerator **1** round

[Arthur Ventures](https://millionrounds.com/fund/arthur-ventures) VC firm **1** round

Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=nucleus-security).

## Quick answers about Nucleus Security

### Who invested in Nucleus Security?

Nucleus Security's investors include In-Q-Tel and Arthur Ventures.

### How much has Nucleus Security raised?

Nucleus Security has raised $20M across 1 round since 2026.

### When did Nucleus Security last raise?

Nucleus Security's most recent round was a Series C of $20M in Feb 2026.

### What was Nucleus Security's biggest round?

Its most recent round, $20M in Feb 2026, is also its largest on record.

### Who backed Nucleus Security first?

Nucleus Security's first round on record, in Feb 2026, was backed by In-Q-Tel and Arthur Ventures.

### What stage is Nucleus Security at?

Nucleus Security's latest named round is a Series C, in Feb 2026.

### Where is Nucleus Security based?

Nucleus Security is based in the United States.

## Companies like Nucleus Security

In the same sector, and raised in the last eighteen months.

[**FORT Robotics** $39M · Oct 2026](https://millionrounds.com/company/fort-robotics)[**Opsin** $21M · Oct 2026](https://millionrounds.com/company/opsin)[**Harmonic Security** $68M · Oct 2026](https://millionrounds.com/company/harmonic-security)[**Reach Security** $60M · Oct 2026](https://millionrounds.com/company/reach-security)[**Persona** $210M · Oct 2026](https://millionrounds.com/company/persona)[**Hilt** $4.7M · Oct 2026](https://millionrounds.com/company/hilt)

## Find investors like these

Search every investor by what they have actually funded, then narrow to your stage and market. Free.

Open the investor searchOr these rounds in the app