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Airhart Steven

Disclosed activity across 1 company

Tapewire entity
74569
SEC CIK
0002080750

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
Deep Isolation Nuclear, Inc.DBHL · Entity 9903President-FESOctober 06, 2026October 09, 2026

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

Deep Isolation Nuclear, Inc.

Report date October 06, 2026 · Filed October 09, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect412,200 Reported balance After 2026-10-06 transaction · row 1 Account or security details depend on footnotes; rows are not merged.
1 source row

Row 1 · 2026-10-06 · Grant · Acquired 20,000 · Balance 412,200

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: 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.

Stock Option (right to buy)SEC Table II · derivative / convertible security · Conversion / exercise price $3.50 · Expires 2036-09-29Direct32,110 Reported balance After 2026-10-06 transaction · row 2 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 2 · 2026-10-06 · Grant · Disposed 32,110 · Balance 32,110

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: 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.

Filing footnotes · ownership attribution and instrument terms

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: 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.

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: 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.

Transaction history

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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 dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
October 06, 2026 Filed Oct 9, 2026 00:27 UTC Deep Isolation Nuclear, Inc. DBHL · Entity 9903 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.

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October 06, 2026 Filed Oct 9, 2026 00:27 UTC Deep Isolation Nuclear, Inc. DBHL · Entity 9903 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.

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October 01, 2025 Filed Oct 3, 2025 16:00 UTC Deep Isolation Nuclear, Inc. NONE · Entity 9903 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.

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October 01, 2025 Filed Oct 3, 2025 16:00 UTC Deep Isolation Nuclear, Inc. NONE · Entity 9903 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.

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