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Cha Myoungil

Disclosed activity across 1 company

Tapewire entity
44687
SEC CIK
0001934068

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
TANDEM DIABETES CARE INCTNDM · Entity 4682DirectorMay 20, 2026May 22, 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.

TANDEM DIABETES CARE INC

Report date May 20, 2026 · Filed May 22, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect22,458 Reported balance After 2026-05-21 transaction · row 1
1 source row

Row 1 · 2026-05-21 · Exercise / conversion · Acquired 8,759 · Balance 22,458

Restricted Stock UnitSEC Table II · derivative / convertible securityDirect10,220 Reported balance After 2026-05-20 transaction · row 2 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 2 · 2026-05-20 · Grant · Acquired 10,220 · Balance 10,220

F1: Each restricted stock units (RSU) represents a contingent right to receive either one share of the Issuers common stock or cash in lieu thereof, at the Issuers discretion, in accordance with the terms of the Tandem Diabetes Care, Inc. 2023 Long-Term Incentive Plan, as amended, and agreements related thereto (the 2023 Plan).

F2: Such RSUs were granted to the Reporting Person on May 20, 2026, and will vest on the one-year anniversary thereof, subject to the terms of the 2023 Plan.

Restricted Stock UnitSEC Table II · derivative / convertible securityDirect0 Reported balance After 2026-05-21 transaction · row 3 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 3 · 2026-05-21 · Exercise / conversion · Disposed 8,759 · Balance 0

F1: Each restricted stock units (RSU) represents a contingent right to receive either one share of the Issuers common stock or cash in lieu thereof, at the Issuers discretion, in accordance with the terms of the Tandem Diabetes Care, Inc. 2023 Long-Term Incentive Plan, as amended, and agreements related thereto (the 2023 Plan).

F3: On May 21, 2025, the Reporting Person was granted 8,759 RSUs, all of which vested and converted into shares of the Issuers common stock on the one-year anniversary thereof in accordance with the 2023 Plan.

Filing footnotes · ownership attribution and instrument terms

F1: Each restricted stock units (RSU) represents a contingent right to receive either one share of the Issuers common stock or cash in lieu thereof, at the Issuers discretion, in accordance with the terms of the Tandem Diabetes Care, Inc. 2023 Long-Term Incentive Plan, as amended, and agreements related thereto (the 2023 Plan).

F2: Such RSUs were granted to the Reporting Person on May 20, 2026, and will vest on the one-year anniversary thereof, subject to the terms of the 2023 Plan.

F3: On May 21, 2025, the Reporting Person was granted 8,759 RSUs, all of which vested and converted into shares of the Issuers common stock on the one-year anniversary thereof in accordance with the 2023 Plan.

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
May 21, 2026 Filed May 22, 2026 20:04 UTC TANDEM DIABETES CARE INC TNDM · Entity 4682 Exercise / conversionRestricted Stock Unit · Derivative 8,759 $0.00 $0.00
Disclosure

SEC source: 0001438133-26-000072 · wk-form4_1779480278.xml · derivative · entry 3

Cha Myoungil · CIK 0001934068 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 8,759 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each restricted stock units (RSU) represents a contingent right to receive either one share of the Issuers common stock or cash in lieu thereof, at the Issuers discretion, in accordance with the terms of the Tandem Diabetes Care, Inc. 2023 Long-Term Incentive Plan, as amended, and agreements related thereto (the 2023 Plan).

F3 · derivative.exercise_date: On May 21, 2025, the Reporting Person was granted 8,759 RSUs, all of which vested and converted into shares of the Issuers common stock on the one-year anniversary thereof in accordance with the 2023 Plan.

F3 · derivative.expiration_date: On May 21, 2025, the Reporting Person was granted 8,759 RSUs, all of which vested and converted into shares of the Issuers common stock on the one-year anniversary thereof in accordance with the 2023 Plan.

Read SEC document
May 21, 2026 Filed May 22, 2026 20:04 UTC TANDEM DIABETES CARE INC TNDM · Entity 4682 Exercise / conversionCommon Stock 8,759 $0.00 $0.00
Disclosure

SEC source: 0001438133-26-000072 · wk-form4_1779480278.xml · nonDerivative · entry 1

Cha Myoungil · CIK 0001934068 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,458

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
May 20, 2026 Filed May 22, 2026 20:04 UTC TANDEM DIABETES CARE INC TNDM · Entity 4682 GrantRestricted Stock Unit · Derivative 10,220 $0.00 $0.00
Disclosure

SEC source: 0001438133-26-000072 · wk-form4_1779480278.xml · derivative · entry 2

Cha Myoungil · CIK 0001934068 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,220

Underlying: Common Stock · 10,220 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock units (RSU) represents a contingent right to receive either one share of the Issuers common stock or cash in lieu thereof, at the Issuers discretion, in accordance with the terms of the Tandem Diabetes Care, Inc. 2023 Long-Term Incentive Plan, as amended, and agreements related thereto (the 2023 Plan).

F2 · derivative.exercise_date: Such RSUs were granted to the Reporting Person on May 20, 2026, and will vest on the one-year anniversary thereof, subject to the terms of the 2023 Plan.

F2 · derivative.expiration_date: Such RSUs were granted to the Reporting Person on May 20, 2026, and will vest on the one-year anniversary thereof, subject to the terms of the 2023 Plan.

Read SEC document
June 16, 2025 Filed Jun 18, 2025 20:08 UTC TANDEM DIABETES CARE INC TNDM · Entity 4682 Exercise / conversionRestricted Stock Unit · Derivative 1,749 $0.00 $0.00
Disclosure

SEC source: 0001438133-25-000141 · wk-form4_1750277283.xml · derivative · entry 2

Cha Myoungil · CIK 0001934068 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,749 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · security: Awarded on June 15, 2022 pursuant to the Tandem Diabetes Care, Inc. 2013 Stock Incentive Plan, as amended, and the agreements related thereto (the 2013 Plan).

F2 · derivative.exercise_price: Each restricted stock unit (RSU) represents a contingent right to receive either one share of common stock of the Issuer or cash in lieu thereof, at the Issuer's discretion, in accordance with the terms of the 2013 Plan.

F3 · derivative.exercise_date: The total number of shares subject to the RSU will vest over a period of three years in equal annual installments on the anniversary of the grant, subject to the terms of the 2013 Plan.

F3 · derivative.expiration_date: The total number of shares subject to the RSU will vest over a period of three years in equal annual installments on the anniversary of the grant, subject to the terms of the 2013 Plan.

Read SEC document
June 16, 2025 Filed Jun 18, 2025 20:08 UTC TANDEM DIABETES CARE INC TNDM · Entity 4682 Exercise / conversionCommon Stock 1,749 $0.00 $0.00
Disclosure

SEC source: 0001438133-25-000141 · wk-form4_1750277283.xml · nonDerivative · entry 1

Cha Myoungil · CIK 0001934068 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,699

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
May 22, 2025 Filed May 23, 2025 20:03 UTC TANDEM DIABETES CARE INC TNDM · Entity 4682 Exercise / conversionRestricted Stock Unit · Derivative 4,387 $0.00 $0.00
Disclosure

SEC source: 0001438133-25-000107 · wk-form4_1748030616.xml · derivative · entry 2

Cha Myoungil · CIK 0001934068 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 4,387 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · security: Awarded on May 22, 2024 pursuant to the Tandem Diabetes Care, Inc. 2023 Long-Term Incentive Plan, as amended, and agreements related thereto (the 2023 Plan).

F2 · derivative.exercise_price: Each restricted stock unit (RSU) represents a contingent right to receive either one share of common stock of the Issuer or cash in lieu thereof, at the Issuer's discretion, in accordance with the terms of the 2023 Plan.

F3 · derivative.exercise_date: RSU will vest on the one-year anniversary of the grant date, subject to the terms of the 2023 Plan.

F3 · derivative.expiration_date: RSU will vest on the one-year anniversary of the grant date, subject to the terms of the 2023 Plan.

Read SEC document
May 22, 2025 Filed May 23, 2025 20:03 UTC TANDEM DIABETES CARE INC TNDM · Entity 4682 Exercise / conversionCommon Stock 4,387 $20.64 $90,547.68
Disclosure

SEC source: 0001438133-25-000107 · wk-form4_1748030616.xml · nonDerivative · entry 1

Cha Myoungil · CIK 0001934068 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,950

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
May 21, 2025 Filed May 23, 2025 20:03 UTC TANDEM DIABETES CARE INC TNDM · Entity 4682 GrantRestricted Stock Unit · Derivative 8,759 $0.00 $0.00
Disclosure

SEC source: 0001438133-25-000107 · wk-form4_1748030616.xml · derivative · entry 3

Cha Myoungil · CIK 0001934068 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,759

Underlying: Common Stock · 8,759 shares

Expires not disclosed

F4 · security: Awarded on May 21, 2025 pursuant to the 2023 Plan.

F2 · derivative.exercise_price: Each restricted stock unit (RSU) represents a contingent right to receive either one share of common stock of the Issuer or cash in lieu thereof, at the Issuer's discretion, in accordance with the terms of the 2023 Plan.

F3 · derivative.exercise_date: RSU will vest on the one-year anniversary of the grant date, subject to the terms of the 2023 Plan.

F3 · derivative.expiration_date: RSU will vest on the one-year anniversary of the grant date, subject to the terms of the 2023 Plan.

Read SEC document
June 17, 2024 Filed Jun 20, 2024 20:42 UTC TANDEM DIABETES CARE INC TNDM · Entity 4682 Exercise / conversionRestricted Stock Unit · Derivative 1,749 $0.00 $0.00
Disclosure

SEC source: 0001438133-24-000163 · wk-form4_1718916130.xml · derivative · entry 2

Cha Myoungil · CIK 0001934068 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,749

Underlying: Common Stock · 1,749 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · security: Awarded on June 15, 2022 pursuant to the Tandem Diabetes Care, Inc. 2013 Stock Incentive Plan, as amended, and the agreements related thereto (the 2013 Plan).

F2 · derivative.exercise_price: Each restricted stock unit (RSU) represents a contingent right to receive either one share of common stock of the Issuer or cash in lieu thereof, at the Issuer's discretion, in accordance with the terms of the 2013 Plan.

F3 · derivative.exercise_date: The total number of shares subject to the RSU will vest over a period of three years in equal annual installments on the anniversary of the grant, subject to the terms of the 2013 Plan.

F3 · derivative.expiration_date: The total number of shares subject to the RSU will vest over a period of three years in equal annual installments on the anniversary of the grant, subject to the terms of the 2013 Plan.

Read SEC document
June 17, 2024 Filed Jun 20, 2024 20:42 UTC TANDEM DIABETES CARE INC TNDM · Entity 4682 Exercise / conversionCommon Stock 1,749 $45.33 $79,282.17
Disclosure

SEC source: 0001438133-24-000163 · wk-form4_1718916130.xml · nonDerivative · entry 1

Cha Myoungil · CIK 0001934068 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,563

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
May 24, 2024 Filed May 24, 2024 23:23 UTC TANDEM DIABETES CARE INC TNDM · Entity 4682 Exercise / conversionRestricted Stock Unit · Derivative 4,065 $0.00 $0.00
Disclosure

SEC source: 0001438133-24-000127 · wk-form4_1716592978.xml · derivative · entry 3

Cha Myoungil · CIK 0001934068 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 4,065 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · security: Awarded on May 24, 2023 pursuant to the 2023 Plan.

F2 · derivative.exercise_price: Each restricted stock unit (RSU) represents a contingent right to receive either one share of common stock of the Issuer or cash in lieu thereof, at the Issuer's discretion, in accordance with the terms of the 2023 Plan.

F3 · derivative.exercise_date: RSU will vest on the one-year anniversary of the grant date, subject to the terms of the 2023 Plan.

F3 · derivative.expiration_date: RSU will vest on the one-year anniversary of the grant date, subject to the terms of the 2023 Plan.

Read SEC document
May 24, 2024 Filed May 24, 2024 23:23 UTC TANDEM DIABETES CARE INC TNDM · Entity 4682 Exercise / conversionCommon Stock 4,065 $51.73 $210,282.45
Disclosure

SEC source: 0001438133-24-000127 · wk-form4_1716592978.xml · nonDerivative · entry 1

Cha Myoungil · CIK 0001934068 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,814

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
May 22, 2024 Filed May 24, 2024 23:23 UTC TANDEM DIABETES CARE INC TNDM · Entity 4682 GrantRestricted Stock Unit · Derivative 4,387 $0.00 $0.00
Disclosure

SEC source: 0001438133-24-000127 · wk-form4_1716592978.xml · derivative · entry 2

Cha Myoungil · CIK 0001934068 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,387

Underlying: Common Stock · 4,387 shares

Expires not disclosed

F1 · security: Awarded on May 22, 2024 pursuant to the Tandem Diabetes Care, Inc. 2023 Long-Term Incentive Plan (the 2023 Plan).

F2 · derivative.exercise_price: Each restricted stock unit (RSU) represents a contingent right to receive either one share of common stock of the Issuer or cash in lieu thereof, at the Issuer's discretion, in accordance with the terms of the 2023 Plan.

F3 · derivative.exercise_date: RSU will vest on the one-year anniversary of the grant date, subject to the terms of the 2023 Plan.

F3 · derivative.expiration_date: RSU will vest on the one-year anniversary of the grant date, subject to the terms of the 2023 Plan.

Read SEC document
June 15, 2023 Filed Jun 16, 2023 20:05 UTC TANDEM DIABETES CARE INC TNDM · Entity 4682 Exercise / conversionRestricted Stock Unit · Derivative 1,749 $0.00 $0.00
Disclosure

SEC source: 0001438133-23-000141 · wk-form4_1686945946.xml · derivative · entry 2

Cha Myoungil · CIK 0001934068 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,498

Underlying: Common Stock · 1,749 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · security: Awarded on June 15, 2022 pursuant to the Tandem Diabetes Care, Inc. 2013 Stock Incentive Plan, as amended, and the agreements related thereto (the 2013 Plan).

F2 · derivative.exercise_price: Each restricted stock unit (RSU) represents a contingent right to receive either one share of common stock of the Issuer or cash in lieu thereof, at the Issuer's discretion, in accordance with the terms of the 2013 Plan.

F3 · derivative.exercise_date: The total number of shares subject to the RSU will vest over a period of three years in equal annual installments on the anniversary of the grant, subject to the terms of the 2013 Plan.

F3 · derivative.expiration_date: The total number of shares subject to the RSU will vest over a period of three years in equal annual installments on the anniversary of the grant, subject to the terms of the 2013 Plan.

Read SEC document
June 15, 2023 Filed Jun 16, 2023 20:05 UTC TANDEM DIABETES CARE INC TNDM · Entity 4682 Exercise / conversionCommon Stock 1,749 $0.00 $0.00
Disclosure

SEC source: 0001438133-23-000141 · wk-form4_1686945946.xml · nonDerivative · entry 1

Cha Myoungil · CIK 0001934068 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,749

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
May 24, 2023 Filed May 26, 2023 20:06 UTC TANDEM DIABETES CARE INC TNDM · Entity 4682 Exercise / conversionRSU 2023 05 24 · Derivative 4,065 $0.00 $0.00
Disclosure

SEC source: 0001438133-23-000105 · wf-form4_168513156337246.xml · derivative · entry 1

Cha Myoungil · CIK 0001934068 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,065

Underlying: Common Stock · 4,065 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · security: Awarded on May 24, 2023 pursuant to the Tandem Diabetes Care, Inc. 2023 Long-Term Incentive Plan (the 2023 Plan).

F2 · derivative.exercise_price: Each restricted stock unit (RSU) represents a contingent right to receive either one share of common stock of the Issuer or cash in lieu thereof, at the Issuer's discretion, in accordance with the terms of the 2023 Plan.

F3 · derivative.exercise_date: RSU will vest on the one-year anniversary of the grant date, subject to the terms of the 2023 Plan.

F3 · derivative.expiration_date: RSU will vest on the one-year anniversary of the grant date, subject to the terms of the 2023 Plan.

Read SEC document
June 15, 2022 Filed Jun 17, 2022 22:46 UTC TANDEM DIABETES CARE INC TNDM · Entity 4682 GrantRestricted Stock Unit · Derivative 5,247 $0.00 $0.00
Disclosure

SEC source: 0001438133-22-000167 · wf-form4_165550599505977.xml · derivative · entry 1

Cha Myoungil · CIK 0001934068 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,247

Underlying: Common Stock · 5,247 shares

Expires not disclosed

F1 · security: Awarded on June 15, 2022 pursuant to the Tandem Diabetes Care, Inc. 2013 Stock Incentive Plan, as amended, and the agreements related thereto (the "2013 Plan").

F2 · derivative.exercise_price: Each restricted stock unit (RSU) represents a contingent right to receive either one share of common stock of the Issuer or cash in lieu thereof, at the Issuer's discretion, in accordance with the terms of the 2013 Plan.

F3 · derivative.exercise_date: The total number of shares subject to the RSU will vest over a period of three years in equal annual installments on the anniversary of the grant, subject to the terms of the 2013 Plan.

F3 · derivative.expiration_date: The total number of shares subject to the RSU will vest over a period of three years in equal annual installments on the anniversary of the grant, subject to the terms of the 2013 Plan.

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.