Deep Fission grants 18,962 RSUs to director

JANOVER BLAKE reported acquisition or exercise transactions in this Form 4 filing.

Accepted by SEC EDGAR 07/27/2026 - 05:02 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

JANOVER BLAKE reported acquisition or exercise transactions in this Form 4 filing.

DEEP FISSION, INC. reported that director Janover Blake received a grant of 18,962 Restricted Stock Units on July 23, 2026. Each unit represents a right to one share of common stock and will vest on July 20, 2027, contingent on continued service, leaving 18,962 RSUs held directly.

Insider Trade Summary

Grant/Award: 18,962 shares

Grant/Award 1 txn

Insider JANOVER BLAKE

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Unit F1	18,962	$0.00	$0.00

Holdings After Transaction: Restricted Stock Unit — 18,962 contracts (Direct)

Footnotes (1)

1. 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.

Key Figures

RSUs granted: 18,962 units Per-unit grant price: $0.00 RSUs after transaction: 18,962 units +1 more

4 metrics

RSUs granted 18,962 units Restricted Stock Units granted to director Janover Blake on July 23, 2026

Per-unit grant price $0.00 Reported transaction price per Restricted Stock Unit for the award

RSUs after transaction 18,962 units Total Restricted Stock Units held directly after the reported acquisition

RSU vesting date July 20, 2027 Date when the RSUs vest if the service condition is satisfied

Key Terms

Restricted Stock Unit, contingent right, vesting

3 terms

Restricted Stock Unit financial

"Each restricted stock unit represents a contingent right to receive one share"

A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.

contingent right financial

"represents a contingent right to receive one share of the Issuer's common"

vesting financial

"The units vest on July 20, 2027, provided the holder continues to provide service"

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did DEEP FISSION (FISN) disclose in this Form 4?

DEEP FISSION, INC. (FISN) disclosed that director Janover Blake received an award of 18,962 Restricted Stock Units on July 23, 2026. These RSUs convert into common shares only if they vest on July 20, 2027, subject to a continued service condition.

How many DEEP FISSION (FISN) shares are covered by the new RSU award?

The award covers 18,962 Restricted Stock Units, each tied to one share of DEEP FISSION common stock. The filing shows a per-unit transaction price of $0.00, indicating a compensation grant rather than an open-market purchase.

When do the RSUs granted to Janover Blake by DEEP FISSION (FISN) vest?

The RSUs vest on July 20, 2027, provided Janover Blake continues to provide service through that date. Only upon vesting does each Restricted Stock Unit entitle the holder to receive one share of DEEP FISSION common stock.

What are Janover Blake’s reported RSU holdings in DEEP FISSION (FISN) after this grant?

After the reported transaction, Janover Blake is shown as directly holding 18,962 Restricted Stock Units. This total reflects the new grant and represents derivative equity interests tied to future delivery of DEEP FISSION common stock upon vesting.

Was the DEEP FISSION (FISN) RSU grant to Janover Blake made under a Rule 10b5-1 plan?

The filing’s Rule 10b5-1 checkbox is not marked as affirming a trading plan, indicating the RSU grant was not reported as made under a Rule 10b5-1 or similar pre-arranged trading arrangement.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

JANOVER BLAKE

(Last) (First) (Middle)

C/O DEEP FISSION, INC.

2001 ADDISON ST., SUITE 300

(Street)

BERKELEY CALIFORNIA 94704

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
DEEP FISSION, INC. [ FISN ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
07/23/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Unit	$0	07/23/2026		A		18,962		(1)	(1)	Common Stock	18,962	$0	18,962	D

Explanation of Responses:

1. 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.

	/s/ Jon Gordon, as Attorney-in-Fact for Blake Janover	07/27/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)