Leslie Goldman Tepper - 12 Nov 2025 Form 4 Insider Report for DEEP FISSION, INC.

Reporting relationship: Director
Issuer ticker: FISN on Nasdaq
Reported as of: 12 Nov 2025
Net transaction value: $0
SEC form: 4
Accepted by SEC: 14 Nov 2025, 20:22:13 UTC
Prior SEC filing: 14 Nov 2025
Next SEC filing: 21 Nov 2025
Source filing: View source filing
Reporting owner signature: /s/ Leslie Goldman Tepper By Jon Gordon, as Attorney-in-Fact

Key filing fact

Leslie Goldman Tepper filed Form 4 for DEEP FISSION, INC. on 14 Nov 2025.

Key facts

This page summarizes Leslie Goldman Tepper's Form 4 filing for DEEP FISSION, INC..
1 reported transaction and 1 derivative row are listed below.
Accepted by SEC: 14 Nov 2025, 20:22.

Change

Previous filing in this sequence was filed on 14 Nov 2025.
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 0002062355 Primary reporting owner

Goldman Tepper Leslie

Relationship: Director
Address: C/O DEEP FISSION INC., 2831 GARBER STREET, BERKELEY
Signature: /s/ Leslie Goldman Tepper By Jon Gordon, as Attorney-in-Fact
Signature date: 14 Nov 2025

Reported derivative securities

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

No ticker transaction Derivative

Restricted Stock Units

Award

Transaction value: $0
Shares: +100,000
Change %
Price: $0.000000
Shares after: 100,000
Date: 12 Nov 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 100,000
Exercise price: $0.000000
Footnotes: F1, F2

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

Each restricted stock unit gives the holder the right to receive one share of the Issuer's common stock upon vesting. The units vest after six months, as long as the holder continues to provide service through the vesting date. After the units vest, the holder may choose to delay receiving the shares until the earlier of a qualifying distribution event or the end of service, as allowed under the Issuer's equity incentive plan.

Footnote F2

These restricted stock units do not have an expiration date.