Mark Wayne Peres - 19 Feb 2026 Form 3 Insider Report for DEEP FISSION, INC.

Role
Chief Nuclear Officer
Signature
/s/ Jon Gordon as attorney-in-Fact for Mark Peres
Issuer symbol
N/A
Transactions as of
19 Feb 2026
Net transactions value
$0
Form type
3
Filing time
23 Feb 2026, 21:09:05 UTC
Next filing
10 Mar 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Peres Mark Wayne Chief Nuclear Officer C/O DEEP FISSION, INC., 2001 ADDISON STREET, SUITE 300, BERKELEY /s/ Jon Gordon as attorney-in-Fact for Mark Peres 23 Feb 2026 0002110467

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
holding Common Stock 86,607 19 Feb 2026 Direct F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Reflects shares of common stock received in connection with the merger completed in September 2025. A portion of the shares are subject to the Company's right of repurchase at cost upon termination of service, which right lapses as the shares vest.

Remarks:

Exhibit 24: Power of Attorney attached herewith.