Jonathon Angell - 09 Mar 2026 Form 4 Insider Report for DEEP FISSION, INC.

Role: Director
Signature: /s/ Jon Gordon, as Attorney-in-Fact for Jonathon Angell
Issuer symbol: N/A
Transactions as of: 09 Mar 2026
Net transactions value: $0
Form type: 4
Filing time: 10 Mar 2026, 17:30:36 UTC
Previous filing: 21 Nov 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Angell Jonathon	Director	C/O DEEP FISSION, INC., 2001 ADDISON ST., SUITE 300, BERKELEY	/s/ Jon Gordon, as Attorney-in-Fact for Jonathon Angell	10 Mar 2026	0002080569

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction		Restricted Stock Unit	Award		+3,334	+3.3%	$0.000000^*	103,334	09 Mar 2026	Common Stock	3,334	$0.000000	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
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 the one-year anniversary of the grant date, provided the holder continues to provide service through the vesting date. After the units vest, the holder may elect to defer receipt of the shares until the earlier of a qualifying distribution event or the termination of service, as permitted under the Issuer's equity incentive plan.

Content

Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock upon vesting. The units vest on the one-year anniversary of the grant date, provided the holder continues to provide service through the vesting date. After the units vest, the holder may elect to defer receipt of the shares until the earlier of a qualifying distribution event or the termination of service, as permitted under the Issuer's equity incentive plan.