# Deep Fission funding: rounds and investors

> Deep Fission has raised $80M across 1 round since 2026. Investors include 8VC, Blue Owl and Mark Tompkins of Montrose Capital. Every round with its source.

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

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

# Who invested in *Deep Fission*

One round we have observed, with the 4 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.

Cleantech Energy

Raised 9 months ago

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Funding summary Updated 7 Nov 2026

**$80M** raised across 1 round since 2026, from 1 source

- **Latest round:** Round, $80M Feb 2026
- **Investors:** 4

See who backed them

## The rounds

- **Feb 2026** Round **$80M** [8VC](https://millionrounds.com/fund/8vc) [Blue Owl](https://millionrounds.com/fund/blue-owl) [Mark Tompkins of Montrose Capital](https://millionrounds.com/fund/mark-tompkins-of-montrose-capital) [Ed Eisler of EE Holdings](https://millionrounds.com/fund/ed-eisler-of-ee-holdings) Reported by Ventureburn SEC filing: $80M sold, first sale Feb 2026

## Funding filed with regulators

Deep Fission filed one raise, $80M in all. Filings say how much was sold and to how many investors; they never name the investors.

- Feb 2026 **$80M** 223 investors SEC Form D

## Founders and team

From Deep Fission's own website: 10 on the team.

- **Bryan Black** VP of Business Development
- **Chloe Frader** VP of Communications
- **Alex Spire** Strategic Solutions Manager
- **Brian Treadway** Senior Project Director
- **Clay Haddock** Executive Operations Manager
- **Jordan Duling** Project Manager
- **Martin Zapata** Senior Digital Systems Manager
- **Megan Williams** Senior Director of Government Relations
- **Tara Mays** Regional Stakeholder Engagement Manager
- **Tommie Miers** Director of Recruiting

## Everyone who backed them

[8VC](https://millionrounds.com/fund/8vc) VC firm **1** round

[Blue Owl](https://millionrounds.com/fund/blue-owl) Asset manager **1** round

[Mark Tompkins of Montrose Capital](https://millionrounds.com/fund/mark-tompkins-of-montrose-capital) Investment firm **1** round

[Ed Eisler of EE Holdings](https://millionrounds.com/fund/ed-eisler-of-ee-holdings) Investment firm **1** round

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

## Also claim to have backed them

This firm lists Deep Fission as a portfolio company on their own website, but no report of a round names it. They are the firms' own claims, kept apart from the rounds above.

[Wave Function Ventures](https://millionrounds.com/fund/wave-function-ventures) VC firm Per its own site

## Quick answers about Deep Fission

### Who invested in Deep Fission?

Deep Fission's investors include 8VC, Blue Owl, Mark Tompkins of Montrose Capital and Ed Eisler of EE Holdings.

### How much has Deep Fission raised?

Deep Fission has raised $80M across 1 round since 2026.

### When did Deep Fission last raise?

Deep Fission's most recent round was an Undisclosed round of $80M in Feb 2026.

### What was Deep Fission's biggest round?

Its most recent round, $80M in Feb 2026, is also its largest on record.

### Who backed Deep Fission first?

Deep Fission's first round on record, in Feb 2026, was backed by 8VC, Blue Owl and Mark Tompkins of Montrose Capital and 1 others.

### What stage is Deep Fission at?

Deep Fission's latest named round is an Undisclosed round, in Feb 2026.

### Where is Deep Fission based?

Deep Fission is based in the United States.

## Companies like Deep Fission

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

[**Harbinger** $500M · Nov 2026](https://millionrounds.com/company/harbinger)[**Circularity Fuels** $15M · Nov 2026](https://millionrounds.com/company/circularity-fuels)[**Uranium Digital** $23M · Nov 2026](https://millionrounds.com/company/uranium-digital)[**Group14 Technologies** $632M · Oct 2026](https://millionrounds.com/company/group14-technologies)[**Mammoth Energy Services** $58M · Oct 2026](https://millionrounds.com/company/mammoth-energy-services)[**Cala Systems** $24M · Oct 2026](https://millionrounds.com/company/cala-systems)

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