Mark Wayne Peres

Insider Reports History

Identity Names, identifiers, and filing context for this profile. 1 identity field
Reporting-owner location
Greer, SC
SEC source record Original filing metadata and source links for verification. 1 source field
Latest reporting-owner signature
/s/ Jon Gordon, as Attorney-in-Fact for Mark Wayne Peres
Source: Latest parsed Forms 3/4/5 signature
Source evidence Original filing metadata and source links for verification. 1 source field
Transaction source note
Rows are grouped by transaction date from the original SEC filing. Open the aggregated insider activity page to review issuer-level activity across dates.

Reported holdings for Mark Wayne Peres

Form 4 holding Chief Nuclear Officer

DEEP FISSION, INC.

Security class
Employee Stock Option (right to buy)
Shares / value
263,000
Estimated value
Report date
09 Mar 2026
Price
Ownership
Direct
Underlying class
Common Stock
Underlying amount
Form 4 holding Chief Nuclear Officer

DEEP FISSION, INC.

Security class
Restricted Stock Unit
Shares / value
25,000
Estimated value
Report date
19 Feb 2026
Price
Ownership
Direct
Underlying class
Common Stock
Underlying amount

Insider Reports Filed by Mark Wayne Peres

We use cookies and similar technologies to provide certain features, enhance the user experience and, if you allow them, measure engagement and deliver advertising. Analytics and marketing storage stay off until you grant consent. By clicking on "Agree and continue", you declare your consent to the use of the selected optional cookies. Manage preferences to update or revoke optional consent for future visits. For more information, see our Privacy Policy .