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Deep Isolation Nuclear, Inc.

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9903
SEC CIK
0001918080
Parsed reports
54

Last 12 months

Inside the activity.

0 purchase rows · 0 sale rows

Disclosed non-derivative P/S rows, by transaction month. Includes amendments and private transactions.
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MonthPurchasesSales
Nov 202500
Dec 202500
Jan 202600
Feb 202600
Mar 202600
Apr 202600
May 202600
Jun 202600
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Sep 202600
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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateOwner / reported roleActivity / securityShares / unitsReported priceReported valueDetails
October 06, 2026 Filed Oct 9, 2026 00:34 UTC
Muller ElizabethDirector · 10% owner · Chair of the Board
GrantCommon Stock 23,214 $0.00 $0.00
Disclosure

SEC source: 0001213900-26-108177 · ownership.xml · nonDerivative · entry 1

Muller Elizabeth · CIK 0002081850 · Director · 10% owner · Chair of the Board

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,771,267

F1 · security: Represents a grant of restricted stock units ("RSUs") to the Reporting Person pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. Each RSU represents a contingent right to receive one share of common stock upon vesting. The RSUs shall vest on September 29, 2027, subject to the Reporting Person's continued service through each vesting date. Conversion of the RSUs into shares of common stock of the Issuer upon vesting is deferred until the earliest of the following events to occur: (i) a change of control of the Issuer, (ii) a separation of service as a director by the Reporting Person, or (iii) death of the Reporting Person.

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October 06, 2026 Filed Oct 9, 2026 00:33 UTC
Nelson Joseph EugeneCFO and Treasurer
GrantStock Option (right to buy) · Derivative 5,744 $0.00 Strike: $3.50 $0.00
Disclosure

SEC source: 0001213900-26-108175 · ownership.xml · derivative · entry 2

Nelson Joseph Eugene · CIK 0001879973 · CFO and Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,744

Underlying: Common Stock · 5,744 shares

Expires 2036-09-29

F2 · security: Represents a grant of incentive stock option pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. The option shall vest as follows: 1,436 option shares on September 29, 2027 and the remaining option shares in 36 monthly installments thereafter through September 29, 2030, in each case subject to the Reporting Person's continued service through each vesting date.

F2 · derivative.exercise_date: Represents a grant of incentive stock option pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. The option shall vest as follows: 1,436 option shares on September 29, 2027 and the remaining option shares in 36 monthly installments thereafter through September 29, 2030, in each case subject to the Reporting Person's continued service through each vesting date.

Read SEC document
October 06, 2026 Filed Oct 9, 2026 00:33 UTC
Nelson Joseph EugeneCFO and Treasurer
GrantCommon Stock 3,577 $0.00 $0.00
Disclosure

SEC source: 0001213900-26-108175 · ownership.xml · nonDerivative · entry 1

Nelson Joseph Eugene · CIK 0001879973 · CFO and Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 103,577

F1 · security: Represents a grant of restricted stock units ("RSUs") to the Reporting Person pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. Each RSU represents a contingent right to receive one share of common stock upon vesting. The RSUs shall vest as follows: 894 RSUs on September 29, 2027, 895 RSUs on September 29, 2028, 894 RSUs on September 29, 2029 and 894 RSUs on September 29, 2030, in each case subject to the Reporting Person's continued service through each vesting date.

Read SEC document
October 06, 2026 Filed Oct 9, 2026 00:32 UTC GrantStock Option (right to buy) · Derivative 100,344 $0.00 Strike: $3.50 $0.00
Disclosure

SEC source: 0001213900-26-108173 · ownership.xml · derivative · entry 3

Parker Christopher Lombard · CIK 0002080920 · CCO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 100,344

Underlying: Common Stock · 100,344 shares

Expires 2036-09-29

F2 · security: Represents a grant of non-qualified stock option pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. The option shall vest as follows: 25,086 option shares on September 29, 2027 and the remaining option shares in 36 monthly installments thereafter through September 29, 2030, in each case subject to the Reporting Person's continued service through each vesting date.

F2 · derivative.exercise_date: Represents a grant of non-qualified stock option pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. The option shall vest as follows: 25,086 option shares on September 29, 2027 and the remaining option shares in 36 monthly installments thereafter through September 29, 2030, in each case subject to the Reporting Person's continued service through each vesting date.

Read SEC document
October 06, 2026 Filed Oct 9, 2026 00:32 UTC GrantCommon Stock 62,500 $0.00 $0.00
Disclosure

SEC source: 0001213900-26-108173 · ownership.xml · nonDerivative · entry 1

Parker Christopher Lombard · CIK 0002080920 · CCO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 79,167

F1 · security: Represents a grant of restricted stock units ("RSUs") to the Reporting Person pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. Each RSU represents a contingent right to receive one share of common stock upon vesting. The RSUs shall vest as follows: 15,625 RSUs on each of September 29, 2027, September 29, 2028, September 29, 2029 and September 29, 2030, in each case subject to the Reporting Person's continued service through each vesting date.

Read SEC document
October 06, 2026 Filed Oct 9, 2026 00:30 UTC
McCallum SophieChief of Staff
GrantStock Option (right to buy) · Derivative 2,301 $0.00 Strike: $3.50 $0.00
Disclosure

SEC source: 0001213900-26-108171 · ownership.xml · derivative · entry 3

McCallum Sophie · CIK 0002085363 · Chief of Staff

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,301

Underlying: Common Stock · 2,301 shares

Expires 2036-09-29

F2 · security: Represents a grant of incentive stock option pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. The option shall vest as follows: 16,127 option shares on September 29, 2027, 1,344 option shares on October 29, 2027, 386 option shares on November 29, 2027, and the remaining option shares in monthly installments on the 29th day of each month (or the last day of the month, if earlier) from January 29, 2028 through September 29, 2030, in each case subject to the Reporting Person's continued service through each vesting date.

F3 · derivative.exercise_date: Represents a grant of non-qualified stock option pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. The option shall vest as follows: 958 option shares on November 29, 2027 and 1,343 option shares on December 29, 2027, in each case subject to the Reporting Person's continued service through each vesting date.

Read SEC document
October 06, 2026 Filed Oct 9, 2026 00:30 UTC
McCallum SophieChief of Staff
GrantStock Option (right to buy) · Derivative 62,206 $0.00 Strike: $3.50 $0.00
Disclosure

SEC source: 0001213900-26-108171 · ownership.xml · derivative · entry 2

McCallum Sophie · CIK 0002085363 · Chief of Staff

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 62,206

Underlying: Common Stock · 62,206 shares

Expires 2036-09-29

F2 · security: Represents a grant of incentive stock option pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. The option shall vest as follows: 16,127 option shares on September 29, 2027, 1,344 option shares on October 29, 2027, 386 option shares on November 29, 2027, and the remaining option shares in monthly installments on the 29th day of each month (or the last day of the month, if earlier) from January 29, 2028 through September 29, 2030, in each case subject to the Reporting Person's continued service through each vesting date.

F2 · derivative.exercise_date: Represents a grant of incentive stock option pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. The option shall vest as follows: 16,127 option shares on September 29, 2027, 1,344 option shares on October 29, 2027, 386 option shares on November 29, 2027, and the remaining option shares in monthly installments on the 29th day of each month (or the last day of the month, if earlier) from January 29, 2028 through September 29, 2030, in each case subject to the Reporting Person's continued service through each vesting date.

Read SEC document
October 06, 2026 Filed Oct 9, 2026 00:30 UTC
McCallum SophieChief of Staff
GrantCommon Stock 40,179 $0.00 $0.00
Disclosure

SEC source: 0001213900-26-108171 · ownership.xml · nonDerivative · entry 1

McCallum Sophie · CIK 0002085363 · Chief of Staff

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 56,846

F1 · security: Represents a grant of restricted stock units ("RSUs") to the Reporting Person pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. Each RSU represents a contingent right to receive one share of common stock upon vesting. The RSUs shall vest as follows: 10,045 RSUs on September 29, 2027, 10,045 RSUs on September 29, 2028, 10,044 RSUs on September 29, 2029 and 10,045 RSUs on September 29, 2030, in each case subject to the Reporting Person's continued service through each vesting date.

Read SEC document
October 06, 2026 Filed Oct 9, 2026 00:30 UTC
Sloane JesseExecutive VP of Engineering
GrantStock Option (right to buy) · Derivative 15,046 $0.00 Strike: $3.50 $0.00
Disclosure

SEC source: 0001213900-26-108170 · ownership.xml · derivative · entry 3

Sloane Jesse · CIK 0002081236 · Executive VP of Engineering

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,046

Underlying: Common Stock · 15,046 shares

Expires 2036-09-29

F2 · security: Represents a grant of incentive stock option pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. The option shall vest as follows: 20,000 option shares on September 29, 2027, with the remaining option shares vesting in monthly installments on the 29th day of each month (or the last day of the month, if earlier) from January 29, 2028 through September 29, 2030, other than December 2028 and December 2029, in each case subject to the Reporting Person's continued service through each vesting date.

F3 · derivative.exercise_date: Represents a grant of non-qualified stock option pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. The option shall vest as follows: 3,518 option shares on September 29, 2027, 1,960 option shares on each of October 29, November 29 and December 29, 2027, 1,558 option shares on November 29, 2028, 1,960 option shares on December 29, 2028, 170 option shares on November 29, 2029 and 1,960 option shares on December 29, 2029, in each case subject to the Reporting Person's continued service through each vesting date.

Read SEC document
October 06, 2026 Filed Oct 9, 2026 00:30 UTC
Sloane JesseExecutive VP of Engineering
GrantStock Option (right to buy) · Derivative 79,027 $0.00 Strike: $3.50 $0.00
Disclosure

SEC source: 0001213900-26-108170 · ownership.xml · derivative · entry 2

Sloane Jesse · CIK 0002081236 · Executive VP of Engineering

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 79,027

Underlying: Common Stock · 79,027 shares

Expires 2036-09-29

F2 · security: Represents a grant of incentive stock option pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. The option shall vest as follows: 20,000 option shares on September 29, 2027, with the remaining option shares vesting in monthly installments on the 29th day of each month (or the last day of the month, if earlier) from January 29, 2028 through September 29, 2030, other than December 2028 and December 2029, in each case subject to the Reporting Person's continued service through each vesting date.

F2 · derivative.exercise_date: Represents a grant of incentive stock option pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. The option shall vest as follows: 20,000 option shares on September 29, 2027, with the remaining option shares vesting in monthly installments on the 29th day of each month (or the last day of the month, if earlier) from January 29, 2028 through September 29, 2030, other than December 2028 and December 2029, in each case subject to the Reporting Person's continued service through each vesting date.

Read SEC document
October 06, 2026 Filed Oct 9, 2026 00:30 UTC
Sloane JesseExecutive VP of Engineering
GrantCommon Stock 58,594 $0.00 $0.00
Disclosure

SEC source: 0001213900-26-108170 · ownership.xml · nonDerivative · entry 1

Sloane Jesse · CIK 0002081236 · Executive VP of Engineering

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 71,927

F1 · security: Represents a grant of restricted stock units ("RSUs") to the Reporting Person pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. Each RSU represents a contingent right to receive one share of common stock upon vesting. The RSUs shall vest as follows: 14,649 RSUs on September 29, 2027, 14,648 RSUs on September 29, 2028, 14,649 RSUs on September 29, 2029 and 14,648 RSUs on September 29, 2030, in each case subject to the Reporting Person's continued service through each vesting date.

Read SEC document
October 06, 2026 Filed Oct 9, 2026 00:29 UTC GrantCommon Stock 4,643 $0.00 $0.00
Disclosure

SEC source: 0001213900-26-108167 · ownership.xml · nonDerivative · entry 1

Hunter Ralph L. JR · CIK 0002088585 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 117,976

F1 · security: Represents a grant of restricted stock units ("RSUs") to the Reporting Person pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. Each RSU represents a contingent right to receive one share of common stock upon vesting. The RSUs shall vest on September 29, 2027, subject to the Reporting Person's continued service through each vesting date. Conversion of the RSUs into shares of common stock of the Issuer upon vesting is deferred until the earliest of the following events to occur: (i) a change of control of the Issuer, (ii) a separation of service as a director by the Reporting Person, or (iii) death of the Reporting Person.

Read SEC document
October 06, 2026 Filed Oct 9, 2026 00:29 UTC GrantCommon Stock 17,024 $0.00 $0.00
Disclosure

SEC source: 0001213900-26-108166 · ownership.xml · nonDerivative · entry 1

Steele Christa · CIK 0001530084 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 130,357

F1 · security: Represents a grant of restricted stock units ("RSUs") to the Reporting Person pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. Each RSU represents a contingent right to receive one share of common stock upon vesting. The RSUs shall vest on September 29, 2027, subject to the Reporting Person's continued service through each vesting date. Conversion of the RSUs into shares of common stock of the Issuer upon vesting is deferred until the earliest of the following events to occur: (i) a change of control of the Issuer, (ii) a separation of service as a director by the Reporting Person, or (iii) death of the Reporting Person.

Read SEC document
October 06, 2026 Filed Oct 9, 2026 00:28 UTC GrantCommon Stock 15,476 $0.00 $0.00
Disclosure

SEC source: 0001213900-26-108164 · ownership.xml · nonDerivative · entry 1

HORNBAKER RENEE J · CIK 0001208752 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 128,809

F1 · security: Represents a grant of restricted stock units ("RSUs") to the Reporting Person pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. Each RSU represents a contingent right to receive one share of common stock upon vesting. The RSUs shall vest on September 29, 2027, subject to the Reporting Person's continued service through each vesting date. Conversion of the RSUs into shares of common stock of the Issuer upon vesting is deferred until the earliest of the following events to occur: (i) a change of control of the Issuer, (ii) a separation of service as a director by the Reporting Person, or (iii) death of the Reporting Person.

Read SEC document
October 06, 2026 Filed Oct 9, 2026 00:28 UTC GrantCommon Stock 23,214 $0.00 $0.00
Disclosure

SEC source: 0001213900-26-108162 · ownership.xml · nonDerivative · entry 1

Goldman Tepper Leslie · CIK 0002062355 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 201,464

F1 · security: Represents a grant of restricted stock units ("RSUs") to the Reporting Person pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. Each RSU represents a contingent right to receive one share of common stock upon vesting. The RSUs shall vest on September 29, 2027, subject to the Reporting Person's continued service through each vesting date. Conversion of the RSUs into shares of common stock of the Issuer upon vesting is deferred until the earliest of the following events to occur: (i) a change of control of the Issuer, (ii) a separation of service as a director by the Reporting Person, or (iii) death of the Reporting Person.

Read SEC document
October 06, 2026 Filed Oct 9, 2026 00:27 UTC
Whitten-Doolin Paula BeckGC and Corporate Secretary
GrantStock Option (right to buy) · Derivative 4,778 $0.00 Strike: $3.50 $0.00
Disclosure

SEC source: 0001213900-26-108160 · ownership.xml · derivative · entry 2

Whitten-Doolin Paula Beck · CIK 0001951825 · GC and Corporate Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,778

Underlying: Common Stock · 4,778 shares

Expires 2036-09-29

F2 · security: Represents a grant of incentive stock option pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. The option shall vest as follows: 1,195 option shares on September 29, 2027 and the remaining option shares in 36 monthly installments thereafter through September 29, 2030, in each case subject to the Reporting Person's continued service through each vesting date.

F2 · derivative.exercise_date: Represents a grant of incentive stock option pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. The option shall vest as follows: 1,195 option shares on September 29, 2027 and the remaining option shares in 36 monthly installments thereafter through September 29, 2030, in each case subject to the Reporting Person's continued service through each vesting date.

Read SEC document
October 06, 2026 Filed Oct 9, 2026 00:27 UTC
Whitten-Doolin Paula BeckGC and Corporate Secretary
GrantCommon Stock 2,976 $0.00 $0.00
Disclosure

SEC source: 0001213900-26-108160 · ownership.xml · nonDerivative · entry 1

Whitten-Doolin Paula Beck · CIK 0001951825 · GC and Corporate Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 77,976

F1 · security: Represents a grant of restricted stock units ("RSUs") to the Reporting Person pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. Each RSU represents a contingent right to receive one share of common stock upon vesting. The RSUs shall vest as follows: 744 RSUs on each of September 29, 2027, September 29, 2028, September 29, 2029 and September 29, 2030, in each case subject to the Reporting Person's continued service through each vesting date.

Read SEC document
October 06, 2026 Filed Oct 9, 2026 00:27 UTC
Baltzer RodneyDirector · President and CEO
GrantStock Option (right to buy) · Derivative 38,526 $0.00 Strike: $3.50 $0.00
Disclosure

SEC source: 0001213900-26-108161 · ownership.xml · derivative · entry 3

Baltzer Rodney · CIK 0002080757 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,526

Underlying: Common Stock · 38,526 shares

Expires 2036-09-29

F2 · security: Represents a grant of incentive stock option pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. The option shall vest as follows: 22,500 option shares on September 29, 2027, with the remaining option shares vesting in monthly installments on the 29th day of each month (or the last day of the month, if earlier) from January through September of each of 2028, 2029 and 2030, in each case subject to the Reporting Person's continued service through each vesting date.

F3 · derivative.exercise_date: Represents a grant of non-qualified stock option pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. The option shall vest as follows: 10,435 option shares on September 29, 2027, 2,201 option shares on September 29, 2028 and 1,190 option shares on September 29, 2029, with the remaining option shares vesting in monthly installments of 2,744 or 2,745 option shares on each of October 29, November 29 and December 29 of 2027, 2028 and 2029, in each case subject to the Reporting Person's continued service through each vesting date.

Read SEC document
October 06, 2026 Filed Oct 9, 2026 00:27 UTC
Baltzer RodneyDirector · President and CEO
GrantStock Option (right to buy) · Derivative 93,212 $0.00 Strike: $3.50 $0.00
Disclosure

SEC source: 0001213900-26-108161 · ownership.xml · derivative · entry 2

Baltzer Rodney · CIK 0002080757 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 93,212

Underlying: Common Stock · 93,212 shares

Expires 2036-09-29

F2 · security: Represents a grant of incentive stock option pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. The option shall vest as follows: 22,500 option shares on September 29, 2027, with the remaining option shares vesting in monthly installments on the 29th day of each month (or the last day of the month, if earlier) from January through September of each of 2028, 2029 and 2030, in each case subject to the Reporting Person's continued service through each vesting date.

F2 · derivative.exercise_date: Represents a grant of incentive stock option pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. The option shall vest as follows: 22,500 option shares on September 29, 2027, with the remaining option shares vesting in monthly installments on the 29th day of each month (or the last day of the month, if earlier) from January through September of each of 2028, 2029 and 2030, in each case subject to the Reporting Person's continued service through each vesting date.

Read SEC document
October 06, 2026 Filed Oct 9, 2026 00:27 UTC
Baltzer RodneyDirector · President and CEO
GrantCommon Stock 82,054 $0.00 $0.00
Disclosure

SEC source: 0001213900-26-108161 · ownership.xml · nonDerivative · entry 1

Baltzer Rodney · CIK 0002080757 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,161,764

F1 · security: Represents a grant of restricted stock units ("RSUs") to the Reporting Person pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. Each RSU represents a contingent right to receive one share of common stock upon vesting. The RSUs shall vest as follows: 20,514 RSUs on September 29, 2027, 20,513 RSUs on September 29, 2028, 20,514 RSUs on September 29, 2029 and 20,513 RSUs on September 29, 2030, subject to the Reporting Person's continued service through each vesting date.

Read SEC document
October 06, 2026 Filed Oct 9, 2026 00:27 UTC
Airhart StevenPresident-FES
GrantStock Option (right to buy) · Derivative 32,110 $0.00 Strike: $3.50 $0.00
Disclosure

SEC source: 0001213900-26-108158 · ownership.xml · derivative · entry 2

Airhart Steven · CIK 0002080750 · President-FES

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,110

Underlying: Common Stock · 32,110 shares

Expires 2036-09-29

F2 · security: Represents a grant of incentive stock option pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. The option shall vest as follows: 8,028 option shares on September 29, 2027 and the remaining option shares equally in 36 monthly installments thereafter through September 29, 2030, in each case subject to the Reporting Person's continued service through each vesting date.

F2 · derivative.exercise_date: Represents a grant of incentive stock option pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. The option shall vest as follows: 8,028 option shares on September 29, 2027 and the remaining option shares equally in 36 monthly installments thereafter through September 29, 2030, in each case subject to the Reporting Person's continued service through each vesting date.

Read SEC document
October 06, 2026 Filed Oct 9, 2026 00:27 UTC
Airhart StevenPresident-FES
GrantCommon Stock 20,000 $0.00 $0.00
Disclosure

SEC source: 0001213900-26-108158 · ownership.xml · nonDerivative · entry 1

Airhart Steven · CIK 0002080750 · President-FES

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 412,200

F1 · security: Represents a grant of restricted stock units ("RSUs") to the Reporting Person pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. Each RSU represents a contingent right to receive one share of common stock upon vesting. The RSUs shall vest as follows: 5,000 RSUs on each of September 29, 2027, September 29, 2028, September 29, 2029 and September 29, 2030, subject to the Reporting Person's continued service through each vesting date.

Read SEC document
October 06, 2026 Filed Oct 9, 2026 00:27 UTC GrantCommon Stock 23,214 $0.00 $0.00
Disclosure

SEC source: 0001213900-26-108159 · ownership.xml · nonDerivative · entry 1

Angell Jonathon · CIK 0002080569 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 482,121

F1 · security: Represents a grant of restricted stock units ("RSUs") to the Reporting Person pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. Each RSU represents a contingent right to receive one share of common stock upon vesting. The RSUs shall vest on September 29, 2027, subject to the Reporting Person's continued service through each vesting date. Conversion of the RSUs into shares of common stock of the Issuer upon vesting is deferred until the earliest of the following events to occur: (i) a change of control of the Issuer, (ii) a separation of service as a director by the Reporting Person, or (iii) death of the Reporting Person.

Read SEC document
May 27, 2026 Filed May 29, 2026 15:08 UTC
Nelson Joseph EugeneChief Financial Officer
GrantStock Option (right to buy) · Derivative 40,000 $0.00 Strike: $3.00 $0.00
Disclosure

SEC source: 0001213900-26-062731 · ownership.xml · derivative · entry 2

Nelson Joseph Eugene · CIK 0001879973 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 40,000

Underlying: Common Stock · 40,000 shares

Expires 2036-02-24

F2 · kind: Represents a grant of stock options pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. The options shall vest over a period of four years beginning on February 24, 2027, whereby 1/4th of the option shares shall vest on that date and 1/48th of the option shares shall vest monthly thereafter, subject to the Reporting Person's continued service through each vesting date.

F2 · derivative.exercise_date: Represents a grant of stock options pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. The options shall vest over a period of four years beginning on February 24, 2027, whereby 1/4th of the option shares shall vest on that date and 1/48th of the option shares shall vest monthly thereafter, subject to the Reporting Person's continued service through each vesting date.

Read SEC document
May 27, 2026 Filed May 29, 2026 15:08 UTC
Nelson Joseph EugeneChief Financial Officer
GrantCommon Stock 100,000 $0.00 $0.00
Disclosure

SEC source: 0001213900-26-062731 · ownership.xml · nonDerivative · entry 1

Nelson Joseph Eugene · CIK 0001879973 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 100,000

F1 · acquired: Represents a grant of 100,000 restricted stock units ("RSUs") to the Reporting Person pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. Each RSU represents a contingent right to receive one share of common stock upon vesting. The RSUs shall vest in equal annual installments of 25% over a period of four years beginning on February 24, 2027, subject to the Reporting Person's continued service through each vesting date.

Read SEC document
May 27, 2026 Filed May 29, 2026 19:09 UTC GrantStock Option (right to buy) · Derivative 25,000 $0.00 Strike: $3.00 $0.00
Disclosure

SEC source: 0001213900-26-062737 · ownership.xml · derivative · entry 2

Whitten-Doolin Paula Beck · CIK 0001951825 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,000

Underlying: Common Stock · 25,000 shares

Expires 2036-02-24

F2 · kind: Represents a grant of stock options pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. The options shall vest over a period of four years beginning on February 24, 2027, whereby 1/4th of the option shares shall vest on that date and 1/48th of the option shares shall vest monthly thereafter, subject to the Reporting Person's continued service through each vesting date.

F2 · derivative.exercise_date: Represents a grant of stock options pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. The options shall vest over a period of four years beginning on February 24, 2027, whereby 1/4th of the option shares shall vest on that date and 1/48th of the option shares shall vest monthly thereafter, subject to the Reporting Person's continued service through each vesting date.

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May 27, 2026 Filed May 29, 2026 19:09 UTC GrantCommon Stock 75,000 $0.00 $0.00
Disclosure

SEC source: 0001213900-26-062737 · ownership.xml · nonDerivative · entry 1

Whitten-Doolin Paula Beck · CIK 0001951825 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 75,000

F1 · acquired: Represents a grant of 75,000 restricted stock units ("RSUs") to the Reporting Person pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. Each RSU represents a contingent right to receive one share of common stock upon vesting. The RSUs shall vest in equal annual installments of 25% over a period of four years beginning on February 24, 2027, subject to the Reporting Person's continued service through each vesting date.

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January 21, 2026 Filed Apr 28, 2026 20:20 UTC GrantCommon Stock 43,333 $0.00 $0.00
Disclosure

SEC source: 0001213900-26-048567 · ownership.xml · nonDerivative · entry 1

Hunter Ralph L. JR · CIK 0002088585 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 43,333

F1 · kind: Represents the grant of restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's common stock upon settlement. The RSUs shall fully vest in 1 year and are subject to a deferral based on the earliest to occur of a change of control, a separation of service as a director, and death.

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November 19, 2025 Filed Nov 21, 2025 11:11 UTC
Sloane JesseEVP Engineering
GrantStock Option (Right to Buy) · Derivative 2,215 $0.00 Strike: $3.00 $0.00
Disclosure

SEC source: 0001213900-25-113422 · ownership.xml · derivative · entry 2

Sloane Jesse · CIK 0002081236 · EVP Engineering

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 40,000

Underlying: Common Shares · 2,215 shares

Expires 2035-11-19

F2 · derivative.exercise_date: The Stock Option is subject to a 4-year vesting schedule, whereby 1/48th of the option shares will vest monthly beginning on November 19, 2025, subject to Reporting Person's continued service through each vesting date.

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November 19, 2025 Filed Nov 21, 2025 11:11 UTC
Sloane JesseEVP Engineering
GrantCommon Stock 738 $0.00 $0.00
Disclosure

SEC source: 0001213900-25-113422 · ownership.xml · nonDerivative · entry 1

Sloane Jesse · CIK 0002081236 · EVP Engineering

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,333

F1 · kind: Represents the grant of restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's common stock upon settlement. The RSUs are subject to a 4-year vesting period, whereby 1/48th of the RSUs will vest monthly beginning November 19, 2025, subject to the Reporting Person's continuous service through each vesting date.

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November 19, 2025 Filed Nov 21, 2025 11:12 UTC
Muller ElizabethDirector · 10% owner
GrantCommon Stock 43,333 $0.00 $0.00
Disclosure

SEC source: 0001213900-25-113423 · ownership.xml · nonDerivative · entry 1

Muller Elizabeth · CIK 0002081850 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,748,053

F1 · kind: Represents the grant of restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's common stock upon settlement. The RSUs shall fully vest in 1 year and are subject to a deferral based on the earlier to occur of a change of control, a separation of service as a director, and death.

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November 19, 2025 Filed Nov 21, 2025 11:19 UTC GrantStock Option (Right to Buy) · Derivative 15,364 $0.00 Strike: $3.00 $0.00
Disclosure

SEC source: 0001213900-25-113435 · ownership.xml · derivative · entry 3

Parker Christopher Lombard · CIK 0002080920 · CCO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,001

Underlying: Common Shares · 15,364 shares

Expires 2035-11-19

F3 · derivative.exercise_date: The Stock Option is subject to a 4-year vesting schedule, whereby 1/48th of the option shares will vest monthly beginning on November 19, 2025, subject to Reporting Person's continued service through each vesting date.

Read SEC document
November 19, 2025 Filed Nov 21, 2025 11:19 UTC GrantCommon Stock 5,121 $0.00 $0.00
Disclosure

SEC source: 0001213900-25-113435 · ownership.xml · nonDerivative · entry 1

Parker Christopher Lombard · CIK 0002080920 · CCO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,667

F1 · kind: Represents the grant of restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's common stock upon settlement. The RSUs are subject to a 4-year vesting period, whereby 1/48th of the RSUs will vest monthly beginning November 19, 2025, subject to the Reporting Person's continuous service through each vesting date.

Read SEC document
November 19, 2025 Filed Nov 21, 2025 16:13 UTC GrantCommon Stock 43,333 $0.00 $0.00
Disclosure

SEC source: 0001213900-25-113424 · ownership.xml · nonDerivative · entry 1

HORNBAKER RENEE J · CIK 0001208752 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 43,333

F1 · kind: Represents the grant of restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's common stock upon settlement. The RSUs shall fully vest in 1 year and are subject to a deferral based on the earlier to occur of a change of control, a separation of service as a director, and death.

Read SEC document
November 19, 2025 Filed Nov 21, 2025 16:15 UTC GrantCommon Stock 43,333 $0.00 $0.00
Disclosure

SEC source: 0001213900-25-113429 · ownership.xml · nonDerivative · entry 1

Steele Christa · CIK 0001530084 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 43,333

F1 · kind: Represents the grant of restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's common stock upon settlement. The RSUs shall fully vest in 1 year and are subject to a deferral based on the earlier to occur of a change of control, a separation of service as a director, and death.

Read SEC document
November 19, 2025 Filed Nov 21, 2025 18:39 UTC GrantCommon Stock 43,333 $0.00 $0.00
Disclosure

SEC source: 0001213900-25-113509 · ownership.xml · nonDerivative · entry 1

Goldman Tepper Leslie · CIK 0002062355 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 108,250

F1 · kind: Represents the grant of restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's common stock upon settlement. The RSUs shall fully vest in 1 year and are subject to a deferral based on the earlier to occur of a change of control, a separation of service as a director, and death.

Read SEC document
November 19, 2025 Filed Nov 21, 2025 16:16 UTC
McCallum SophieChief of Staff, Corp. Sec.
GrantStock Option (Right to Buy) · Derivative 20,393 $0.00 Strike: $3.00 $0.00
Disclosure

SEC source: 0001213900-25-113432 · ownership.xml · derivative · entry 2

McCallum Sophie · CIK 0002085363 · Chief of Staff, Corp. Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 50,001

Underlying: Common Shares · 20,393 shares

Expires 2035-11-19

F2 · derivative.exercise_date: The Stock Option is subject to a 4-year vesting schedule, whereby 1/48th of the option shares will vest monthly beginning on November 19, 2025, subject to Reporting Person's continued service through each vesting date.

Read SEC document
November 19, 2025 Filed Nov 21, 2025 16:16 UTC
McCallum SophieChief of Staff, Corp. Sec.
GrantCommon Stock 6,798 $0.00 $0.00
Disclosure

SEC source: 0001213900-25-113432 · ownership.xml · nonDerivative · entry 1

McCallum Sophie · CIK 0002085363 · Chief of Staff, Corp. Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,667

F1 · kind: Represents the grant of restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's common stock upon settlement. The RSUs are subject to a 4-year vesting period, whereby 1/48th of the RSUs will vest monthly beginning November 19, 2025, subject to the Reporting Person's continuous service through each vesting date.

Read SEC document
November 19, 2025 Filed Nov 21, 2025 16:14 UTC GrantCommon Stock 43,333 $0.00 $0.00
Disclosure

SEC source: 0001213900-25-113427 · ownership.xml · nonDerivative · entry 1

Angell Jonathon · CIK 0002080569 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 388,907

F1 · kind: Represents the grant of restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's common stock upon settlement. The RSUs shall fully vest in 1 year and are subject to a deferral based on the earlier to occur of a change of control, a separation of service as a director, and death.

Read SEC document
October 17, 2025 Filed Oct 21, 2025 20:05 UTC GrantStock Option (Right to Buy) · Derivative 10,833 $0.00 Strike: $3.00 $0.00
Disclosure

SEC source: 0001213900-25-100808 · ownership.xml · derivative · entry 2

HORNBAKER RENEE J · CIK 0001208752 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,833

Underlying: Common Shares · 10,833 shares

Expires 2035-10-17

F2 · derivative.exercise_date: The Stock Option is subject to a 4-year vesting schedule, whereby 1/48th of the option shares will vest monthly beginning on October 17, 2025, subject to Reporting Person's continued service through each vesting date.

Read SEC document
October 17, 2025 Filed Oct 21, 2025 20:05 UTC GrantCommon Stock 32,500 $0.00 $0.00
Disclosure

SEC source: 0001213900-25-100808 · ownership.xml · nonDerivative · entry 1

HORNBAKER RENEE J · CIK 0001208752 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,500

F1 · kind: Represents the grant of restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's common stock upon settlement. The RSUs are subject to a 4-year vesting period, whereby 1/48th of the RSUs will vest monthly beginning October 17, 2025, subject to the Reporting Person's continuous service through each vesting date.

Read SEC document
October 01, 2025 Filed Oct 3, 2025 16:00 UTC
Airhart StevenPres, Freestone Env Svcs
GrantStock Option (Right to Buy) · Derivative 33,329 $0.00 Strike: $3.00 $0.00
Disclosure

SEC source: 0001213900-25-096057 · ownership.xml · derivative · entry 2

Airhart Steven · CIK 0002080750 · Pres, Freestone Env Svcs

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,329

Underlying: Common Shares · 33,329 shares

Expires 2035-10-01

F2 · derivative.exercise_date: The Stock Option is subject to a 4-year vesting schedule, whereby 1/48th of the option shares will vest monthly beginning on October 1, 2025, subject to Reporting Person's continued service through each vesting date.

Read SEC document
October 01, 2025 Filed Oct 3, 2025 16:00 UTC
Airhart StevenPres, Freestone Env Svcs
GrantCommon Stock 11,110 $0.00 $0.00
Disclosure

SEC source: 0001213900-25-096057 · ownership.xml · nonDerivative · entry 1

Airhart Steven · CIK 0002080750 · Pres, Freestone Env Svcs

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 392,200

F1 · kind: Represents the grant of restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's common stock upon settlement. The RSUs are subject to a 4-year vesting period, whereby 1/48th of the RSUs will vest monthly beginning October 1, 2025, subject to the Reporting Person's continuous service through each vesting date.

Read SEC document
October 01, 2025 Filed Oct 3, 2025 16:00 UTC
Sloane JesseEVP Engineering
GrantStock Option (Right to Buy) · Derivative 37,785 $0.00 Strike: $3.00 $0.00
Disclosure

SEC source: 0001213900-25-096055 · ownership.xml · derivative · entry 2

Sloane Jesse · CIK 0002081236 · EVP Engineering

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,785

Underlying: Common Shares · 37,785 shares

Expires 2035-10-01

F2 · derivative.exercise_date: The Stock Option is subject to a 4-year vesting schedule, whereby 1/48th of the option shares will vest monthly beginning on October 1, 2025, subject to Reporting Person's continued service through each vesting date.

Read SEC document
October 01, 2025 Filed Oct 3, 2025 16:00 UTC
Sloane JesseEVP Engineering
GrantCommon Stock 12,595 $0.00 $0.00
Disclosure

SEC source: 0001213900-25-096055 · ownership.xml · nonDerivative · entry 1

Sloane Jesse · CIK 0002081236 · EVP Engineering

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,595

F1 · kind: Represents the grant of restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's common stock upon settlement. The RSUs are subject to a 4-year vesting period, whereby 1/48th of the RSUs will vest monthly beginning October 1, 2025, subject to the Reporting Person's continuous service through each vesting date.

Read SEC document
October 01, 2025 Filed Oct 3, 2025 16:00 UTC GrantStock Option (Right to Buy) · Derivative 34,637 $0.00 Strike: $3.00 $0.00
Disclosure

SEC source: 0001213900-25-096053 · ownership.xml · derivative · entry 3

Parker Christopher Lombard · CIK 0002080920 · CCO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,637

Underlying: Common Shares · 34,637 shares

Expires 2035-10-01

F3 · derivative.exercise_date: The Stock Option is subject to a 4-year vesting schedule, whereby 1/48th of the option shares will vest monthly beginning on October 1, 2025, subject to Reporting Person's continued service through each vesting date.

Read SEC document
October 01, 2025 Filed Oct 3, 2025 16:00 UTC GrantCommon Stock 11,546 $0.00 $0.00
Disclosure

SEC source: 0001213900-25-096053 · ownership.xml · nonDerivative · entry 1

Parker Christopher Lombard · CIK 0002080920 · CCO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,546

F1 · kind: Represents the grant of restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's common stock upon settlement. The RSUs are subject to a 4-year vesting period, whereby 1/48th of the RSUs will vest monthly beginning October 1, 2025, subject to the Reporting Person's continuous service through each vesting date.

Read SEC document
October 01, 2025 Filed Oct 4, 2025 00:32 UTC GrantStock Option (Right to Buy) · Derivative 10,833 $0.00 Strike: $3.00 $0.00
Disclosure

SEC source: 0001213900-25-096243 · ownership.xml · derivative · entry 2

Angell Jonathon · CIK 0002080569 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,833

Underlying: Common Shares · 10,833 shares

Expires 2035-10-01

F2 · derivative.exercise_date: The Stock Option is subject to a 4-year vesting schedule, whereby 1/48th of the option shares will vest monthly beginning on October 1, 2025, subject to Reporting Person's continued service through each vesting date.

Read SEC document
October 01, 2025 Filed Oct 4, 2025 00:32 UTC GrantCommon Stock 32,500 $0.00 $0.00
Disclosure

SEC source: 0001213900-25-096243 · ownership.xml · nonDerivative · entry 1

Angell Jonathon · CIK 0002080569 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 378,074

F1 · kind: Represents the grant of restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's common stock upon settlement. The RSUs are subject to a 4-year vesting period, whereby 1/48th of the RSUs will vest monthly beginning October 1, 2025, subject to the Reporting Person's continuous service through each vesting date.

Read SEC document
October 01, 2025 Filed Oct 3, 2025 20:16 UTC
McCallum SophieChief of Staff, Corp. Sec.
GrantStock Option (Right to Buy) · Derivative 29,608 $0.00 Strike: $3.00 $0.00
Disclosure

SEC source: 0001213900-25-096098 · ownership.xml · derivative · entry 2

McCallum Sophie · CIK 0002085363 · Chief of Staff, Corp. Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,608

Underlying: Common Shares · 29,608 shares

Expires 2035-10-01

F2 · derivative.exercise_date: The Stock Option is subject to a 4-year vesting schedule, whereby 1/48th of the option shares will vest monthly beginning on October 1, 2025, subject to Reporting Person's continued service through each vesting date.

Read SEC document

Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.