Deep Fission, Inc. (FISN) - Insider Trading & Ownership

Real time insider trading transaction history:

  • Insiders are prohibited from making short-swing profits by trading their shares within 6 months of the registration or acquiring the shares.
  • Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
What is insider trading>>
Time period
Insider Trading Transactions for Deep Fission, Inc.
Common stock purchase or sale:
Transaction
Date		Reported
DateTime		CompanySymbolInsider
Relationship		Shares
Traded		Average
Price		Total
Amount		Shares
Owned		Filing
2025-08-26
Sale		2025-08-28
7:01 pm		Surfside Acquisition Inc.Tompkins Mark N.
Director
10% Owner		25,000$0.0001$34,725,000
(Direct)		View
2025-08-26
Purchase		2025-08-28
7:00 pm		Surfside Acquisition Inc.Jacobs Ian Seth
President, CEO, CFO, Secretary		25,000$0.0001$3275,000
(Direct)		View

Stock options: Exercise, Award, Grant, Conversion
Transaction
Date		Reported
DateTime		Exercisable
Expiration		CompanySymnbolInsider
Relationship		Shares
Traded		Conversion
Price		Shares
Owned		Filing

Ownership(A)		2026-04-29
1:47 pm		N/A
N/A		DEEP FISSION INC.Goldman Tepper Leslie
Director		0$0133,996
(Indirect)		View
2026-03-09
Option Award		2026-03-10
5:31 pm		2027-03-09
2036-03-09		DEEP FISSION INC.Schmitz William Mark
Chief Financial Officer		223,000$0223,980
(Direct)		View
2026-03-09
Option Award		2026-03-10
5:30 pm		2027-03-09
2033-03-09		DEEP FISSION INC.Angell Jonathon
Director		3,334$0103,334
(Direct)		View
2026-03-09
Option Award		2026-03-10
5:29 pm		2027-03-09
2033-03-09		DEEP FISSION INC.Goldman Tepper Leslie
Director		3,334$0103,334
(Direct)		View
2026-03-09
Option Award		2026-03-10
5:29 pm		2027-03-09
2033-03-09		DEEP FISSION INC.GLANVILLE THOMAS S
Director		3,334$0103,334
(Direct)		View
2026-03-09
Option Award		2026-03-10
5:28 pm		2027-03-09
2033-03-09		DEEP FISSION INC.JANOVER BLAKE
Director		3,334$0103,334
(Direct)		View
2026-03-09
Option Award		2026-03-10
5:27 pm		2027-03-09
2036-03-09		DEEP FISSION INC.Muller Elizabeth
Chief Executive Officer		2,600,000$04,150,300
(Direct)		View
2026-03-09
Option Award		2026-03-10
5:26 pm		2027-03-09
2036-03-09		DEEP FISSION INC.Muller Richard
Chief Technology Officer		223,000$0872,363
(Direct)		View
2026-03-09
Option Award		2026-03-10
5:25 pm		2027-03-09
2036-03-09		DEEP FISSION INC.Brasel Michael Allen
Chief Operating Officer		445,000$0530,000
(Direct)		View
2026-03-09
Option Award		2026-03-10
5:25 pm		2027-03-09
2036-03-09		DEEP FISSION INC.Peres Mark Wayne
Chief Nuclear Officer		223,000$0263,000
(Direct)		View
2026-03-09
Option Award		2026-03-10
5:24 pm		2027-03-09
2036-03-09		DEEP FISSION INC.Gordon Jonathan H
General Counsel		223,000$0328,000
(Direct)		View
2026-02-18
Option Award		2026-02-24
1:42 pm		2027-02-18
2036-02-18		DEEP FISSION INC.Brasel Michael Allen
See Remarks		15,000$015,000
(Direct)		View
2026-02-18
Option Award		2026-02-23
9:18 pm		2027-02-18
2036-02-18		DEEP FISSION INC.Schmitz William Mark
Chief Financial Officer		15,000$015,000
(Direct)		View
2026-02-18
Option Award		2026-02-23
9:12 pm		2027-02-18
2036-02-18		DEEP FISSION INC.Gordon Jonathan H
See Remarks		20,000$020,000
(Direct)		View
2026-02-19
Option Award		2026-02-23
9:10 pm		N/A
2033-02-19		DEEP FISSION INC.Peres Mark Wayne
Chief Nuclear Officer		40,000$040,000
(Direct)		View

Ownership		2026-02-23
9:09 pm		N/A
N/A		DEEP FISSION INC.Peres Mark Wayne
Chief Nuclear Officer		0$086,607
(Direct)		View
2025-11-07
Option Award		2026-01-07
10:19 am		2026-10-06
2035-11-07		DEEP FISSION INC.Brasel Michael Allen
See Remarks		70,000$070,000
(Direct)		View
2025-12-19
Option Award		2025-12-23
4:06 pm		2026-05-12
N/A		DEEP FISSION INC.JANOVER BLAKE
Director		100,000$0100,000
(Direct)		View
2025-11-12
Option Award		2025-12-22
3:52 pm		2026-05-12
N/A		DEEP FISSION INC.GLANVILLE THOMAS S
Director		100,000$0100,000
(Direct)		View

Ownership		2025-12-22
3:50 pm		2026-05-12
N/A		DEEP FISSION INC.GLANVILLE THOMAS S
Director		0$0100,000
(Direct)		View
2025-12-09
Option Award		2025-12-12
5:02 pm		N/A
2035-12-09		DEEP FISSION INC.Muller Elizabeth
Chief Executive Officer		732,601$01,544,300
(Direct)		View
2025-11-07
Option Award		2025-12-04
12:33 pm		2026-10-07
2035-11-07		DEEP FISSION INC.Gordon Jonathan H
See Remarks		85,000$085,000
(Direct)		View
2025-11-12
Option Award		2025-11-17
12:11 pm		2026-05-12
N/A		DEEP FISSION INC.Angell Jonathon
Director		100,000$0100,000
(Direct)		View

Ownership		2025-11-17
12:10 pm		N/A
N/A		DEEP FISSION INC.Angell Jonathon
Director		0$0324,517
(Direct)		View
2025-11-12
Option Award		2025-11-14
8:22 pm		2026-05-12
N/A		DEEP FISSION INC.Goldman Tepper Leslie
Director		100,000$0100,000
(Direct)		View

Ownership		2025-11-14
8:19 pm		N/A
N/A		DEEP FISSION INC.Goldman Tepper Leslie
Director		0$099,996
(Indirect)		View
2025-09-05
Option Award		2025-09-09
5:43 pm		N/A
N/A		DEEP FISSION INC.Muller Richard
Chief Technology Officer		5,196,426$05,196,426
(Direct)		View

Ownership		2025-09-09
5:40 pm		N/A
2035-08-28		DEEP FISSION INC.Muller Richard
Chief Technology Officer		0$0649,363
(Direct)		View
2025-09-05
Option Award		2025-09-09
5:16 pm		N/A
N/A		DEEP FISSION INC.Muller Elizabeth
President and Chief Executive		10,254,281$010,254,281
(Direct)		View

Ownership		2025-09-09
5:14 pm		N/A
2035-08-28		DEEP FISSION INC.Muller Elizabeth
President and Chief Executive		0$0811,699
(Direct)		View
2025-09-05
Option Award		2025-09-09
5:05 pm		N/A
N/A		DEEP FISSION INC.Schmitz William Mark
Chief Financial Officer		103,928$0103,928
(Direct)		View
2025-09-05
Other		2025-09-08
12:47 pm		N/A
N/A		Surfside Acquisition Inc.Tompkins Mark N.
See Remarks		2,833,333$04,725,000
(Direct)		View

Ownership		2022-04-20
8:05 pm		N/A
N/A		Surfside Acquisition Inc.Tompkins Mark N.
Director
10% Owner		0$04,750,000
(Direct)		View

Ownership		2022-04-20
8:04 pm		N/A
N/A		Surfside Acquisition Inc.Jacobs Ian Seth
President, CEO, CFO, Secretary		0$0250,000
(Direct)		View
(A) Indicate amendment filing.