DEEP FISSION, INC.

Electric Services·BERKELEY, CA

CEO

Muller Elizabeth

Financials

15 shown

Type	Period	Ended	Filed
10-Q	Q3 2025	9/30/25	11/14/25	→
10-Q	Q2 2025	6/30/25	8/12/25	→
10-Q	Q1 2025	3/31/25	5/14/25	→
10-K	FY 2024	12/31/24	3/28/25	→
10-Q	Q3 2024	9/30/24	11/6/24	→
10-Q	Q2 2024	6/30/24	8/13/24	→
↓

News (8-K)

12 shown

Filed	Type	Description
3/5/26	Other	Changes in Registrant's Certifying Accountant	→
2/25/26	Exec Change	Departure or Appointment of Directors or Certain Officers	→
2/10/26	Agreement	Entry into a Material Definitive Agreement	→
12/22/25	Exec Change	Departure or Appointment of Directors or Certain Officers	→
12/11/25	Exec Change	Departure or Appointment of Directors or Certain Officers	→
12/4/25	Reg FD	Regulation FD Disclosure	→
↓

Prospectuses & Registrations

8 shown

Filed	Form	Description
2/17/26	S-1	S-1	→
2/10/26	424B3	424B3	→
2/6/26	424B5	424B5	→
1/27/26	S-1/A	S-1/A	→
12/30/25	S-1/A	S-1/A	→
12/1/25	S-1/A	S-1/A	→
↓

Filing History(77 filings)

TypeDateAccessionPeriodSize

8-K

Mar 5, 2026

0001104659-26-023876FORM 8-K

Feb 27, 2026

186.4 KB

8-K

Feb 25, 2026

0001104659-26-019327FORM 8-K

Feb 18, 2026

183.0 KB

Feb 24, 2026

0001104659-26-019023OWNERSHIP DOCUMENT

Feb 18, 2026

5.5 KB

Feb 23, 2026

0001409378-26-000003

Feb 18, 2026

5.5 KB

Feb 23, 2026

0001104659-26-018750OWNERSHIP DOCUMENT

Feb 18, 2026

5.5 KB

Feb 23, 2026

0001104659-26-018749OWNERSHIP DOCUMENT

Feb 19, 2026

8.1 KB

Feb 23, 2026

0001104659-26-018747OWNERSHIP DOCUMENT

Feb 19, 2026

12.5 KB

Feb 18, 2026

0001918102-26-000001

—

21.7 KB

S-1

Feb 17, 2026

0001104659-26-016226S-1

—

11.8 MB

424B3

Feb 10, 2026

0001104659-26-012346424B3

—

6.9 MB

8-K

Feb 10, 2026

0001104659-26-012343FORM 8-K

Feb 5, 2026

7.2 MB

424B5

Feb 6, 2026

0001104659-26-011504424B5

—

3.1 MB

EFFECT

Feb 5, 2026

9999999995-26-000450

—

1.8 KB

S-1/A

Jan 27, 2026

0001104659-26-006743S-1/A

—

11.5 MB

Jan 7, 2026

0001104659-26-001645OWNERSHIP DOCUMENT

Nov 7, 2025

5.6 KB

Jan 7, 2026

0001104659-26-001644OWNERSHIP DOCUMENT

Nov 7, 2025

3.2 KB

S-1/A

Dec 30, 2025

0001104659-25-125146S-1/A

—

11.4 MB

Dec 23, 2025

0001104659-25-124201OWNERSHIP DOCUMENT

Dec 19, 2025

5.8 KB

Dec 23, 2025

0001104659-25-124192OWNERSHIP DOCUMENT

Dec 19, 2025

18.8 KB

8-K

Dec 22, 2025

0001104659-25-123840FORM 8-K

Dec 19, 2025

257.0 KB

Dec 22, 2025

0001104659-25-123695OWNERSHIP DOCUMENT

Nov 12, 2025

5.8 KB

Dec 22, 2025

0001104659-25-123692OWNERSHIP DOCUMENT

Nov 7, 2025

20.5 KB

Dec 12, 2025

0001104659-25-120704OWNERSHIP DOCUMENT

Dec 9, 2025

29.7 KB

8-K

Dec 11, 2025

0001104659-25-120071FORM 8-K

Dec 9, 2025

209.0 KB

8-K

Dec 4, 2025

0001104659-25-118387FORM 8-K

Dec 4, 2025

197.3 KB

25 filings shown

DEEP FISSION, INC.

Financials

News (8-K)

Prospectuses & Registrations

Filing History(77 filings)

Ownership

Other Filings

Filed	Form	Description
2/24/26	4	OWNERSHIP DOCUMENT	→
2/23/26	4	4	→
2/23/26	4	OWNERSHIP DOCUMENT	→
2/23/26	4	OWNERSHIP DOCUMENT	→
2/23/26	3	OWNERSHIP DOCUMENT	→
1/7/26	4	OWNERSHIP DOCUMENT	→
↓

Filed	Form	Description
2/18/26	D	D	→
2/5/26	EFFECT	EFFECT	→
11/14/25	SCHEDULE 13G/A	SCHEDULE 13G/A	→
11/3/25	SCHEDULE 13G	SCHEDULE 13G	→
9/24/25	D	D	→
9/23/25	SCHEDULE 13D	SCHEDULE 13D	→
↓