Changes in Beneficial Ownership · 4
DEEP ISOLATION NUCLEAR INC
DBHLOTCEQUITYCurrent
Changes in Beneficial Ownership
Structured filing — 4
ownership.xml
Filing details
- Report period
- 2026-10-06
- Issuer
- Deep Isolation Nuclear, Inc.
- Issuer CIK
- 0001918080
- Trading symbol
- DBHL
Reporting owner 1
- Name
- Nelson Joseph Eugene
- Reporting owner CIK
- 0001879973
- Relationship
- Officer
- Officer title
- CFO and Treasurer
- Address
- C/O DEEP ISOLATION NUCLEAR, INC., 5717 LEGACY DRIVE, STE 250, OFFICE 2079, PLANO, TX, 75024
Non-derivative transactions
| Security | Transaction date | Code | Amount | A / D | Price (USD) | Owned after | Ownership |
|---|---|---|---|---|---|---|---|
| Common Stock[F1] | 2026-10-06 | A · Form 4 | 3,577 | A | 0 | 103,577 | D |
Table key
- A · Form 4
- Acquisition by grant, award or otherwise under Rule 16b-3(d)
- A
- Acquired
- D
- Direct
Derivative transactions
| Security | Conversion / exercise price (USD) | Transaction date | Code | Amount | A / D | Price (USD) | Exercisable | Expires | Underlying security | Underlying shares | Owned after | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Stock Option (right to buy)[F2] | 3.50 | 2026-10-06 | A · Form 4 | 5,744 | A | 0 | [F2] | 2036-09-29 | Common Stock | 5,744 | 5,744 | D |
Table key
- A · Form 4
- Acquisition by grant, award or otherwise under Rule 16b-3(d)
- A
- Acquired
- D
- Direct
Footnotes
- F1
- 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.↩ 1
- F2
- 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.↩ 1↩ 2
Signature 1
- Signed
- /s/ Joseph Nelson
- Date
- 2026-10-08
Company context
Deep Isolation (OTCQB: DBHL) is the first company to undertake development of technologies for nuclear waste disposal in deep boreholes. When commercialized, Deep Isolation’s solution will offer a unique approach to help countries identify, plan for and complete the necessary steps to dispose of their nuclear waste inventories. With over 100 patents issued to date, Deep Isolation’s technology is being designed to leverage proven drilling practices to allow safe isolation of waste deep underground in horizontal, vertical, or slanted borehole repositories. Deep Isolation’s Universal Canister System was developed through a three-year project funded by the U.S. Department of Energy’s Advanced Research Projects Agency - Energy and is engineered to support integrated management of spent fuel and high-level radioactive waste from legacy and advanced reactors across storage, transportation, and eventual disposal. In January 2026, Deep Isolation launched a full-scale, at-depth deep borehole Commercialization Pilot for its solution at Cameron, Texas, in collaboration with the Deep Borehole Demonstration Center, Halliburton (NYSE: HAL), Amentum (NYSE: AMTM), NAC International (TYO: 7004), and Occlusion Nuclear Solutions.