FISN

NasdaqGM · Industrials

DEEP FISSION, INC.

$12.42

-14.70% today

U.S. Department of Energy· Contract

The Department of Energy authorized Deep Fission's underground nuclear reactor test deployment under the federal reactor authorization pilot program. · Nov 21

filing 2025-12-09 · 196d behind

Price

1 buy1 sell7 8-K

AI BriefPro

Market cap

$775.52M

Float

36.0M

60% public

Short % float

Pro

Days to cover

Pro

Type	Date	Insider	Title	Shares	Price	Value
Grant	2025-12-12	Muller Elizabeth	Chief Executive Officer	549,451	—	—
Other	2025-09-08	Tompkins Mark N.	—	2,833,333	—	—
Grant	2025-09-09	Schmitz William Mark	Chief Financial Officer	103,928	—	—
Grant	2025-09-09	Muller Elizabeth	President and Chief Executive	5,196,426	—	—
Grant	2025-09-09	Muller Elizabeth	President and Chief Executive	5,057,855	—	—

Grant

Muller Elizabeth

Chief Executive Officer · 2025-12-12

—

549,451 shares

Other

Tompkins Mark N.

2025-09-08

—

2,833,333 shares

Grant

Schmitz William Mark

Chief Financial Officer · 2025-09-09

—

103,928 shares

Grant

Muller Elizabeth

President and Chief Executive · 2025-09-09

—

5,196,426 shares

Grant

Muller Elizabeth

President and Chief Executive · 2025-09-09

—

5,057,855 shares

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