Jonathon Angell - 23 Jul 2026 Form 4 Insider Report for DEEP FISSION, INC. (FISN)

Reporting relationship: Director
Issuer ticker: FISN
Reported as of: 23 Jul 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 27 Jul 2026, 17:00:37 UTC
Prior SEC filing: 10 Mar 2026
Source filing: View source filing
Reporting owner signature: /s/ Jon Gordon, as Attorney-in-Fact for Jonathon Angell

Key filing fact

Jonathon Angell filed Form 4 for DEEP FISSION, INC. (FISN) on 27 Jul 2026.

Key facts

This page summarizes Jonathon Angell's Form 4 filing for DEEP FISSION, INC. (FISN).
1 reported transaction and 1 derivative row are listed below.
Accepted by SEC: 27 Jul 2026, 17:00.

Change

Previous filing in this sequence was filed on 10 Mar 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002080569 Primary reporting owner

Angell Jonathon

Relationship: Director
Address: C/O DEEP FISSION, INC., 2001 ADDISON ST., SUITE 300, BERKELEY
Signature: /s/ Jon Gordon, as Attorney-in-Fact for Jonathon Angell
Signature date: 27 Jul 2026

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

FISN transaction Derivative

Restricted Stock Unit

Award

Transaction value
Shares: +16,973
Change %
Price: $0.000000^*
Shares after: 16,973
Date: 23 Jul 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 16,973
Exercise price: $0.000000
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock upon vesting. The units vest on July 20, 2027, provided the holder continues to provide service through the vesting date.