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Yamamoto Jay Koichi

Disclosed activity across 1 company

Tapewire entity
38540
SEC CIK
0002071885

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
KULR Technology Group, Inc.KULR · Entity 6696General Counsel & SecretaryJune 11, 2026June 13, 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.

KULR Technology Group, Inc.

Report date June 11, 2026 · Filed June 13, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect168,500 Reported balance After 2026-06-11 transaction · row 1
1 source row

Row 1 · 2026-06-11 · Tax withholding · Disposed 9,507 · Balance 168,500

F1: Represents the number of shares of Common Stock that were withheld by the Issuer to satisfy income tax withholding and remittance obligations in connection with the net settlement of restricted stock units ("RSUs") previously granted under the Issuer's equity incentive plan and does not represent a sale.

F2: Represents the previous closing price of the Issuer's Common Stock on the vesting date and does not represent a sale.

Filing footnotes · ownership attribution and instrument terms

F1: Represents the number of shares of Common Stock that were withheld by the Issuer to satisfy income tax withholding and remittance obligations in connection with the net settlement of restricted stock units ("RSUs") previously granted under the Issuer's equity incentive plan and does not represent a sale.

F2: Represents the previous closing price of the Issuer's Common Stock on the vesting date and does not represent a sale.

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
June 11, 2026 Filed Jun 13, 2026 01:30 UTC KULR Technology Group, Inc. KULR · Entity 6696 Tax withholdingCommon Stock 9,507 $3.82 $36,316.74
Disclosure

SEC source: 0001104659-26-073665 · tm2617878-2_4seq1.xml · nonDerivative · entry 1

Yamamoto Jay Koichi · CIK 0002071885 · General Counsel & Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 168,500

F1 · shares: Represents the number of shares of Common Stock that were withheld by the Issuer to satisfy income tax withholding and remittance obligations in connection with the net settlement of restricted stock units ("RSUs") previously granted under the Issuer's equity incentive plan and does not represent a sale.

F2 · price: Represents the previous closing price of the Issuer's Common Stock on the vesting date and does not represent a sale.

Read SEC document
December 06, 2025 Filed Dec 10, 2025 02:30 UTC KULR Technology Group, Inc. KULR · Entity 6696 Tax withholdingCommon Stock 9,493 $3.93 $37,307.49
Disclosure

SEC source: 0001104659-25-119800 · tm2533036-1_4seq1.xml · nonDerivative · entry 1

Yamamoto Jay Koichi · CIK 0002071885 · General Counsel & Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,945

F5 · security: All share and share related information gives retrospective effect to the 8-to-1 reverse stock split effective on June 23, 2025.

F1 · kind: Represents the number of shares of Common Stock that were withheld by the Issuer to satisfy income tax withholding and remittance obligations in connection with the net settlement of restricted stock units ("RSUs") previously granted under the Issuer's equity incentive plan and does not represent a sale.

F1 · shares: Represents the number of shares of Common Stock that were withheld by the Issuer to satisfy income tax withholding and remittance obligations in connection with the net settlement of restricted stock units ("RSUs") previously granted under the Issuer's equity incentive plan and does not represent a sale.

F2 · price: Represents the previous closing price of the Company's Common Stock on the vesting date and does not represent a sale.

F3 · balance_after: Beneficial ownership set forth in Column 5 consists of the 13,945 shares net settled on December 6, 2025 after satisfying tax withholding and remittance obligations, and does not include the 164,062 shares underlying all remaining RSUs held by Mr. Yamamoto, not expected to settle or vest within 60 days of this Form 4.

F4 · balance_after: The beneficial ownership set forth in Column 5 does not include Mr. Yamamoto's indirect ownership of 6,582 shares owned by his spouse and through his spouse's IRA. Mr. Yamamoto does not have direct voting or dispositive control over the shares owned by his spouse.

F5 · balance_after: All share and share related information gives retrospective effect to the 8-to-1 reverse stock split effective on June 23, 2025.

Read SEC document
November 24, 2025 Filed Nov 26, 2025 22:06 UTC KULR Technology Group, Inc. KULR · Entity 6696 GrantCommon Stock 187,500 $0.00 $0.00
Disclosure

SEC source: 0001104659-25-116480 · tm2532218-3_4seq1.xml · nonDerivative · entry 1

Yamamoto Jay Koichi · CIK 0002071885 · General Counsel & Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 187,500

F1 · security: On November 24, 2025 on recommendation of the Compensation Committee of the Board of Directors ("Board") of the Company, the Board approved the issuance of 187,500 restricted stock units of common stock of the Company.

F1 · date: On November 24, 2025 on recommendation of the Compensation Committee of the Board of Directors ("Board") of the Company, the Board approved the issuance of 187,500 restricted stock units of common stock of the Company.

F1 · deemedExecutionDate: On November 24, 2025 on recommendation of the Compensation Committee of the Board of Directors ("Board") of the Company, the Board approved the issuance of 187,500 restricted stock units of common stock of the Company.

F2 · deemedExecutionDate: On November 26, 2025, the Company issued Mr. Yamamoto, 187,500 restricted stock units of common stock of the Company, under its 2025 Equity Incentive Plan. The shares will vest in eight equal semi-annual installments, with 23,438 RSUs vesting on December 6, 2025, followed by alternating installments of 23,437 RSUs and 23,438 RSUs every six months thereafter. The vesting of shares is subject to Mr. Yamamoto's continued service with the Company.

F1 · shares: On November 24, 2025 on recommendation of the Compensation Committee of the Board of Directors ("Board") of the Company, the Board approved the issuance of 187,500 restricted stock units of common stock of the Company.

F2 · shares: On November 26, 2025, the Company issued Mr. Yamamoto, 187,500 restricted stock units of common stock of the Company, under its 2025 Equity Incentive Plan. The shares will vest in eight equal semi-annual installments, with 23,438 RSUs vesting on December 6, 2025, followed by alternating installments of 23,437 RSUs and 23,438 RSUs every six months thereafter. The vesting of shares is subject to Mr. Yamamoto's continued service with the Company.

F4 · shares: All share and share related information gives retrospective effect to the 8-to-1 reverse stock split effective on June 23, 2025.

F3 · balance_after: The number of shares of common stock beneficially owned following the reported transactions does not include Mr. Yamamoto's indirect ownership of 6,581 shares owned by his spouse and through his spouse's IRA. Mr. Yamamoto does not have direct voting or dispositive control over the shares owned by his spouse.

F4 · balance_after: All share and share related information gives retrospective effect to the 8-to-1 reverse stock split effective on June 23, 2025.

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.