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DEEP FISSION, INC. filed a Form D with the Securities and Exchange Commission on 2026-02-18.
DEEP FISSION, INC. filed a Form D notice of an exempt securities offering with the SEC on February 18, 2026. The filing reports $80M sold. Its industry group is Other Energy. It names Elizabeth Muller (Executive Officer, Director), Richard Muller (Executive Officer), William Schmitz (Executive Officer) (SEC Form D, February 18, 2026).
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New Form D on file · 2026-02-18 · the record
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What the filing shows about DEEP FISSION, INC.
Only in the Full Report: Who Runs It, And How To Reach Them · Warning Bells · Who Pays Them, And Who They Are Up Against.
Example from a real report (our sample on Target): “The Q2 2026 earnings report, published August 19, 2026, showed adjusted EPS of $2.46 against an expected $2.33” Source: CNBC
A Full Report on DEEP FISSION, INC.: verified, sourced, every claim cited, ready in a few minutes. See pricing.
The filing gives DEEP FISSION, INC.'s address as 2001 Addison Street, Suite 300, Berkeley, CA 94704.
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Full funding history for DEEP FISSION, INC. →
This is the company's own disclosure. A payment disclosed on a Form D is a disclosed use of proceeds, not a finding of wrongdoing.
DEEP FISSION, INC. is a registered filer with the SEC (CIK 1918102) and has filed since 2025-09-23. 3 filings are on record, the latest on 2026-02-18.
A filing shows the company exists and what it reports about itself. It is not an audit or a rating.
DEEP FISSION, INC.'s Form D of 2026-02-18 names Elizabeth Muller, Richard Muller, William Schmitz and 6 more as its officers, directors or promoters.
Its new offerings report $110M sold across 2 offerings, as its own filings state.
Each marker is one filing. The larger marker is the filing this page is about.
Trailing twelve months. 277 filings in Other Energy, totalled by week. The dot is this raise, $80M, on the same scale — one filing against the whole group's total, so it sits low by construction.
Checked away from the filing. Neither line below comes from the record on sec.gov.
Deep Fission is an advanced nuclear energy deployment company developing small modular pressurized water reactors designed to operate one mile underground. Advanced nuclear for the AI era.
The title and description the site itself served, answering 200. Not a cached copy and not the company's directory entry — what was live when we asked.
Counted only where a thread links to this company's own site, announces it by name on that forum, or names it beside its own Y Combinator batch. A thread whose title merely carries the words is not counted — a name is not an identifier. Hacker News is not us, and nothing above is our opinion of the company.
Elizabeth Muller is named as Executive Officer and Director on the Form D that DEEP FISSION, INC. filed with the SEC on 18 February 2026, one of 9 people that filing names.
Richard Muller is named as Executive Officer on the Form D that DEEP FISSION, INC. filed with the SEC on 18 February 2026, one of 9 people that filing names.
William Schmitz is named as Executive Officer on the Form D that DEEP FISSION, INC. filed with the SEC on 18 February 2026, one of 9 people that filing names.
Thomas Glanville is named as Director on the Form D that DEEP FISSION, INC. filed with the SEC on 18 February 2026, one of 9 people that filing names.
Michael Brasel is named as Executive Officer on the Form D that DEEP FISSION, INC. filed with the SEC on 18 February 2026, one of 9 people that filing names.
Blake Janover is named as Director on the Form D that DEEP FISSION, INC. filed with the SEC on 18 February 2026, one of 9 people that filing names.
Leslie Goldman Tepper is named as Director on the Form D that DEEP FISSION, INC. filed with the SEC on 18 February 2026, one of 9 people that filing names.
Jonathon Angell is named as Director on the Form D that DEEP FISSION, INC. filed with the SEC on 18 February 2026, one of 9 people that filing names.
Jon Gordon is named as Executive Officer on the Form D that DEEP FISSION, INC. filed with the SEC on 18 February 2026, one of 9 people that filing names.
9 people named on the filing — 5 holding an executive role and 4 as directors only.
Named as of the 2026-02-18 filing. Titles and locations are exactly as the filing states — not independently confirmed elsewhere.
No investor is drawn from a Form D — the form states how many invested and never who.
What the filing shows about DEEP FISSION, INC.
Only in the Full Report: Who Runs It, And How To Reach Them · Warning Bells · Who Pays Them, And Who They Are Up Against.
Example from a real report (our sample on Target): “The Q2 2026 earnings report, published August 19, 2026, showed adjusted EPS of $2.46 against an expected $2.33” Source: CNBC
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Sourced from the filing index on sec.gov, from the company's own site, read directly on 2026-11-04 (deepfission.com), and from Hacker News, where 2 threads met the matching rule stated beside the count.
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