DEEP FISSION, INC.
Small modular pressurized water reactors designed for subsurface deployment
- Sector
- Energy
- Headquarters
- BERKELEY, CA
- Founded
- 2021
- Latest Form D
- $80M, Feb 2026
- Total capital
- $110M
- Federal grants
- None on recordNo awards found in SBIR/STTR, NIH, NSF or DoD records.
- Private capital raised
- $110M
- 3 Form D · last Feb 2026
- 8 months since last filing
- Federal contracts
- None on recordNo federal contract awards found.
- Granted patents
- 2
- 9 pending · first 2025
- Rank in peer group#48 of 151
Capital timeline
Latest events
- Private capital raisedForm D · SEC · 3rd filing$80M
- Offering registeredForm D · SEC · 2nd filing$120M
- Private capital raisedForm D · SEC · 1st filing$30M
Node area is scaled to amount. Form D reports securities sold, which can differ from an announced round; filings are numbered in the order they were made.
Standing among 151 peers
Line = medianEnergy · Device
- Granted patents#48 · top 32%
Cumulative measures favor older companies. Rankings describe position today, not outcome. Below the median, ranks show as a band rather than a number.
Founders and team
Researcher links verified by same-company patents and grants- Richard A. MullerResearcherExecutive OfficerLinked by 2 patents
- Blake S. JanoverDirectorNamed in SEC Form D filings
- Elizabeth A. MullerExecutive Officer, DirectorNamed in SEC Form D filings
- Jonathon S. AngellDirectorNamed in SEC Form D filings
- Jon S. GordonExecutive OfficerNamed in SEC Form D filings
- Leslie S. Goldman TepperDirectorNamed in SEC Form D filings
Show all 9 people
- Michael S. BraselExecutive OfficerNamed in SEC Form D filings
- Thomas S. GlanvilleDirectorNamed in SEC Form D filings
- William Mark SchmitzExecutive OfficerNamed in SEC Form D filings
What it has protected
USPTO · 2 granted of 11- GrantedNuclear Reactor System Inside A BoreholeUSPTOUS 12,614,643
- GrantedHeat Exchanger In A Borehole Receives Heat Through A Rock Formation From Another Borehole Which Includes A Nuclear ReactorUSPTOUS 12,469,612
- PendingDeep Borehole Pressurized Water Reactor (DB-PWR)USPTOApplication 63660261
Show all 11 patent records
- Nuclear Reactor System Inside A BoreholeApr 28, 2026 · US 12,614,643Granted
- Heat Exchanger In A Borehole Receives Heat Through A Rock Formation From Another Borehole Which Includes A Nuclear ReactorNov 11, 2025 · US 12,469,612Granted
- Deep Borehole Pressurized Water Reactor (DB-PWR)Application 63660261Pending
- Borehole Nuclear ReactorApplication 63635470Pending
- Drillhole Nuclear ReactorApplication PCTUS2023036605Pending
- Aspects of a Borehole Power Plant SystemApplication 63537900Pending
- Drillhole Nuclear ReactorApplication 63479220Pending
- Drillhole Nuclear ReactorApplication 63421444Pending
- Borehole Nuclear ReactorApplication PCTUS2025024865Pending
- Borehole Nuclear Power Plant SystemApplication 19518106Pending
- Borehole Nuclear Power Plant SystemApplication PCTUS2024046394Pending
Related companies, and why
- VIRIDI PARENTE VARIA VENTURES LLCSimilar federal contract value in Energy · null in contracts
- Voltaiq, Inc.Similar federal contract value in Energy · null in contracts
- Enchanted Rock Ltd.Similar federal contract value in Energy · null in contracts
- Grid20/20, Inc.Similar federal contract value in Energy · null in contracts
- NUGEN HOLDINGS, INC.Similar federal contract value in Energy · null in contracts
- Fervo Energy CompanySimilar federal contract value in Energy · null in contracts
Regulatory activity · Energy
- Air Plan Approval; Michigan; Redesignation and Maintenance Plan for the Partial St. Clair 2010 1-Hour Sulfur Dioxide (SO2) NAAQS Nonattainment AreaEnvironmental Protection Agency
- Air Plan Approval; Delaware; 2006 24-Hour Fine Particulate Matter Limited Maintenance Plan for the Philadelphia Nonattainment AreaEnvironmental Protection Agency
- Air Plan Approval; Oklahoma; Updates to the State Implementation Plan for New Source Review Permitting and General SIP ProvisionsEnvironmental Protection Agency
- List of Approved Spent Fuel Storage Casks: NAC International, Inc., MAGNASTOR® Storage System, Certificate of Compliance No. 1031, Amendment Nos. 16 and 17 and Revisions to Amendment Nos. 0 Through 16Nuclear Regulatory Commission
- Epyrifenacil; Pesticide TolerancesEnvironmental Protection Agency
- Fluoxapiprolin; Pesticide TolerancesEnvironmental Protection Agency
Rules are matched to sector, not to company. Recent activity in a sector is context rather than a signal about this business — until rules are matched to what a company actually builds, the section is shown as context and nothing more.
Sources
Federal grants from SBIR/STTR, NIH, NSF and DoD records. Federal contracts from USAspending.gov. Private capital from SEC Form D. Patents from USPTO. Publications from OpenAlex. Regulatory activity from the Federal Register. Press matched on company name.
How to read this page
Figures show associations in public records, not causes or predictions. Nothing here is investment advice. An em-dash means no record was found under this company's name, not that none exists.
Data freshness
SEC Form D filings through . SBIR and STTR awards through .