Fundraising FoxDeep Isolation
OTC: DBHLBerkeley, US · Founded 2016 · Delaware corporation · 3 known investors
Find your way into Deep Isolation
Sign up to see every warm intro you have to Deep Isolation
- Paths you didn't know you had: your email and LinkedIn already hold routes to the Deep Isolation team. We find them for you
- 2nd- and 3rd-degree connections: the friend-of-a-friend routes that take hours to manually find through your inbox or LinkedIn
- Answers now, not in days: momentum is everything in a raise. Skip asking around whether someone knows someone
Days of research, done the moment you sign in, with every route ranked by how warm it is.
Deep Isolation Nuclear, Inc. is a company whose stock trades on the OTCQB under the ticker DBHL. The page shown is an investor relations section listing SEC filings, quarterly results, and stock information.
Founders & leadership
Deep Isolation was founded in 2016 by Richard Muller and Elizabeth Muller.
RM
Richard MullerCo-founderRichard Muller is a physicist who retired from UC Berkeley in 2010 and co-founded Berkeley Earth, a climate research organization. He co-founded Deep Isolation, a nuclear waste storage company, and currently serves as CTO and co-founder of Deep Fission, which develops small modular nuclear reactors.
EM
Elizabeth MullerCo-Founder and Executive Chair of the BoardElizabeth Muller is an executive officer and director at Deep Isolation, a company developing solutions for nuclear waste management. She also leads Deep Fission, which develops underground nuclear power systems.
JS
Jesse SloaneExecutive Vice President of EngineeringJesse Sloane is Executive Vice President of Engineering at Deep Isolation, where he leads the company's engineering operations and project delivery for nuclear waste management programs. He previously worked at Naval Reactors Headquarters managing spent nuclear fuel packaging and storage, and in engineering consulting focused on project risk and claims analysis; he holds a B.S. in Mechanical Engineering from Drexel University and an M.Eng. in Nuclear Engineering from Penn State, and is a licensed Professional Engineer in Pennsylvania and Virginia.
SM
Sophie McCallumChief Of StaffSophie McCallum is an executive officer at Deep Isolation Nuclear, a company developing technology for permanent disposal of spent nuclear fuel and high-level radioactive waste. She previously held leadership roles in sales, marketing, and operations at another organization, where she led departmental functions including HR and finance.
SA
Steve AirhartPresident-Freestone Environmental Services
Board
JA
Jonathon AngellBoard director
LG
Leslie Goldman TepperBoard director
KC
Kent ColeBoard director
Investors · 3
Also in the syndicate · 2
NAC InternationalSegra Capital Management
Funding
SEC filings, press & company announcements$54.1M disclosed across 2 of 4 rounds · 2019–2025
- Undisclosed amountprivate placementJul 2025
NAC International, Segra Capital Management
Source ↗
▶$33MraisedAug 2025 · 241 investors · OtherRule 506(b)
▶$33MraisedAug 2025 · 241 investors · Other
Rule 506(b)Officers, directors & promoters on the filing
- Jonathon AngellDirector
- Elizabeth MullerDirector
- Steven AirhartExecutive Officer
- Jesse SloaneExecutive Officer
- Christopher ParkerExecutive Officer
- Sophie McCallumExecutive Officer
- Rodney BaltzerExecutive Officer, Director
- Kent ColeDirector
- Leslie Goldman TepperDirector
- Offering amount
- $33M
- Amount sold
- $33M
- Minimum investment
- $5K
- Sales commissions
- $3.2M
- Placement agents
- Christopher James Fiore, Network 1 Financial Securities, Inc., Phoenix Financial Services, Seaport Global Securities LLC, The Benchmark Company, LLC, Dinosaur Financial Group, L.L.C.
- First sale
- Jul 2025
- Incorporated
- Corporation, Delaware, 2021
- Federal exemptions
- 06b
▶$21.1MraisedDec 2020 · 32 investors · Other EnergyRule 506(b)
▶$21.1MraisedDec 2020 · 32 investors · Other Energy
Rule 506(b)Officers, directors & promoters on the filing
- Richard MullerExecutive Officer, Director
- Kent S. ColeDirector
- Elizabeth MullerExecutive Officer, Director
- Offering amount
- $22.4M
- Amount sold
- $21.1M
- First sale
- Nov 2020
- Incorporated
- Corporation, Delaware, 2016
- Federal exemptions
- 06b
Source: SEC EDGAR Form D. Amounts as filed; amended filings shown once at their latest values.
Valuation · disclosed
Disclosed events$172.9Mvaluation at IPOMay 2026 · $3.00/share · S-1/A
filing ↗Source: SEC prospectus filings, and round valuations the company or its investors disclosed — follow each entry's link for the claim.
Founder mafia
2 people who came through Deep Isolation went on to found or lead other companies.
Non-dilutive funding · 5 SBIR/STTR awards
Federal grants — no equity taken| Agency | Phase | Year | Amount |
|---|---|---|---|
| ARPA-E | Phase I | 2023 | $286.6K |
| Department of Energy | Phase II | 2023 | $155.1K |
| Department of Energy | Phase II | 2022 | $1.6M |
| Department of Energy | Phase II | 2022 | $1.6M |
| Department of Energy | Phase I | 2022 | $232.8K |
Source: SBIR.gov award data (U.S. Small Business Administration). SBIR/STTR awards are competitive federal R&D grants and contracts — non-dilutive capital alongside any venture rounds above.
In the news
Frequently asked questions
- What does Deep Isolation do?
- Deep Isolation Nuclear, Inc. is a company whose stock trades on the OTCQB under the ticker DBHL. The page shown is an investor relations section listing SEC filings, quarterly results, and stock information.
- Who founded Deep Isolation?
- Deep Isolation was founded by Richard Muller, Elizabeth Muller in 2016.
- Who are Deep Isolation's investors?
- Deep Isolation's investors include Nucleation Capital.
- How much funding has Deep Isolation raised?
- Deep Isolation has disclosed $54.1M raised across 2 of its 4 known rounds.
- Where is Deep Isolation headquartered?
- Deep Isolation is headquartered in Berkeley, US.