Hansen Shannon Marie

SEC source: 0001438133-25-000090 · wk-form4_1747692420.xml · nonDerivative · entry 6

Hansen Shannon Marie · CIK 0001908267 · EVP & Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,742

F1 · shares: Shares withheld by Tandem Diabetes Care, Inc. (the Company) to satisfy tax withholding requirements on vesting of restricted stock units (RSU). No shares were sold.

SEC source: 0001438133-25-000090 · wk-form4_1747692420.xml · nonDerivative · entry 5

Hansen Shannon Marie · CIK 0001908267 · EVP & Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,312

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.

SEC source: 0001438133-25-000090 · wk-form4_1747692420.xml · nonDerivative · entry 4

Hansen Shannon Marie · CIK 0001908267 · EVP & Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,925

F1 · shares: Shares withheld by Tandem Diabetes Care, Inc. (the Company) to satisfy tax withholding requirements on vesting of restricted stock units (RSU). No shares were sold.

SEC source: 0001438133-25-000090 · wk-form4_1747692420.xml · nonDerivative · entry 3

Hansen Shannon Marie · CIK 0001908267 · EVP & Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,440

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.

SEC source: 0001438133-25-000090 · wk-form4_1747692420.xml · nonDerivative · entry 2

Hansen Shannon Marie · CIK 0001908267 · EVP & Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,003

F1 · shares: Shares withheld by Tandem Diabetes Care, Inc. (the Company) to satisfy tax withholding requirements on vesting of restricted stock units (RSU). No shares were sold.

SEC source: 0001438133-25-000090 · wk-form4_1747692420.xml · nonDerivative · entry 1

Hansen Shannon Marie · CIK 0001908267 · EVP & Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,193

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.

SEC source: 0001438133-25-000019 · wk-form4_1740089252.xml · derivative · entry 7

Hansen Shannon Marie · CIK 0001908267 · EVP & Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,185

Underlying: Common Stock · 1,438 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.

F6 · security: Awarded on May 25, 2023 pursuant to the Tandem Diabetes Care, Inc. 2023 Long-Term Incentive Plan, as amended, and agreements related thereto (the 2023 Plan).

F7 · derivative.exercise_price: Each 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.

F8 · derivative.exercise_date: RSU vest as to thirty-three percent (33%) of the total number of shares subject to the RSU on 5/15/2024, and the remaining shares shall vest in eight (8) equal quarterly installments thereafter.

F8 · derivative.expiration_date: RSU vest as to thirty-three percent (33%) of the total number of shares subject to the RSU on 5/15/2024, and the remaining shares shall vest in eight (8) equal quarterly installments thereafter.

SEC source: 0001438133-25-000019 · wk-form4_1740089252.xml · derivative · entry 6

Hansen Shannon Marie · CIK 0001908267 · EVP & Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,123

Underlying: Common Stock · 531 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.

F3 · security: Awarded on February 15, 2022 pursuant to the Tandem Diabetes Care, Inc. 2013 Stock Incentive Plan, as amended, and the agreements related thereto (the 2013 Plan).

F4 · derivative.exercise_price: Each 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.

F5 · derivative.exercise_date: RSU vest as to twenty-five percent (25%) of the total number of shares subject to the RSU on 2/15/2023, and the remaining shares shall vest in twelve (12) equal quarterly installments thereafter.

F5 · derivative.expiration_date: RSU vest as to twenty-five percent (25%) of the total number of shares subject to the RSU on 2/15/2023, and the remaining shares shall vest in twelve (12) equal quarterly installments thereafter.

SEC source: 0001438133-25-000019 · wk-form4_1740089252.xml · nonDerivative · entry 4

Hansen Shannon Marie · CIK 0001908267 · EVP & Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,662

F1 · shares: Shares withheld by Tandem Diabetes Care, Inc. (the Company) to satisfy tax withholding requirements on vesting of restricted stock units (RSU). No shares were sold.

SEC source: 0001438133-25-000019 · wk-form4_1740089252.xml · nonDerivative · entry 3

Hansen Shannon Marie · CIK 0001908267 · EVP & Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,253

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.

SEC source: 0001438133-25-000019 · wk-form4_1740089252.xml · nonDerivative · entry 2

Hansen Shannon Marie · CIK 0001908267 · EVP & Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,815

F1 · shares: Shares withheld by Tandem Diabetes Care, Inc. (the Company) to satisfy tax withholding requirements on vesting of restricted stock units (RSU). No shares were sold.

SEC source: 0001438133-25-000019 · wk-form4_1740089252.xml · nonDerivative · entry 1

Hansen Shannon Marie · CIK 0001908267 · EVP & Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,034

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.

SEC source: 0001438133-24-000212 · wk-form4_1732054957.xml · derivative · entry 8

Hansen Shannon Marie · CIK 0001908267 · EVP & Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,623

Underlying: Common Stock · 1,437 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.

F7 · security: Awarded on May 25, 2023 pursuant to the Tandem Diabetes Care, Inc. 2023 Long-Term Incentive Plan, as amended, and agreements related thereto (the 2023 Plan).

F8 · 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.

F9 · derivative.exercise_date: RSU vest as to thirty-three percent (33%) of the total number of shares subject to the RSU on 5/15/2024, and the remaining shares shall vest in eight (8) equal quarterly installments thereafter.

F9 · derivative.expiration_date: RSU vest as to thirty-three percent (33%) of the total number of shares subject to the RSU on 5/15/2024, and the remaining shares shall vest in eight (8) equal quarterly installments thereafter.

SEC source: 0001438133-24-000212 · wk-form4_1732054957.xml · derivative · entry 7

Hansen Shannon Marie · CIK 0001908267 · EVP & Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,654

Underlying: Common Stock · 530 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 February 15, 2022 pursuant to the Tandem Diabetes Care, Inc. 2013 Stock Incentive Plan, as amended, and the agreements related thereto (the 2013 Plan).

F5 · derivative.exercise_price: Each 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.

F6 · derivative.exercise_date: RSU vest as to twenty-five percent (25%) of the total number of shares subject to the RSU on 2/15/2023, and the remaining shares shall vest in twelve (12) equal quarterly installments thereafter.

F6 · derivative.expiration_date: RSU vest as to twenty-five percent (25%) of the total number of shares subject to the RSU on 2/15/2023, and the remaining shares shall vest in twelve (12) equal quarterly installments thereafter.

SEC source: 0001438133-24-000212 · wk-form4_1732054957.xml · nonDerivative · entry 5

Hansen Shannon Marie · CIK 0001908267 · EVP & Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,503

F2 · kind: The reporting person is voluntarily reporting the acquisition of shares of common stock pursuant to the Tandem Diabetes Care, Inc. Amended and Restated 2013 Employee Stock Purchase Plan (ESPP), for the ESPP purchase period of May 16, 2024 through November 15, 2024. This transaction is also exempt under Rule 16b-3(c).

SEC source: 0001438133-24-000212 · wk-form4_1732054957.xml · nonDerivative · entry 4

Hansen Shannon Marie · CIK 0001908267 · EVP & Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,942

F1 · kind: Shares withheld by Tandem Diabetes Care, Inc. (the Company) to satisfy tax withholding requirements on vesting of restricted stock units (RSU). No shares were sold.

SEC source: 0001438133-24-000212 · wk-form4_1732054957.xml · nonDerivative · entry 3

Hansen Shannon Marie · CIK 0001908267 · EVP & Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,455

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.

SEC source: 0001438133-24-000212 · wk-form4_1732054957.xml · nonDerivative · entry 2

Hansen Shannon Marie · CIK 0001908267 · EVP & Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,018

F1 · kind: Shares withheld by Tandem Diabetes Care, Inc. (the Company) to satisfy tax withholding requirements on vesting of restricted stock units (RSU). No shares were sold.

SEC source: 0001438133-24-000212 · wk-form4_1732054957.xml · nonDerivative · entry 1

Hansen Shannon Marie · CIK 0001908267 · EVP & Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,208

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.

SEC source: 0001438133-24-000192 · wk-form4_1724113906.xml · derivative · entry 7

Hansen Shannon Marie · CIK 0001908267 · EVP & Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,060

Underlying: Common Stock · 1,437 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.

F6 · security: Awarded on May 25, 2023 pursuant to the Tandem Diabetes Care, Inc. 2023 Long-Term Incentive Plan, as amended, and agreements related thereto (the 2023 Plan).

F7 · derivative.exercise_price: Each 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.

F8 · derivative.exercise_date: RSU vest as to thirty-three percent (33%) of the total number of shares subject to the RSU on 5/15/2024, and the remaining shares shall vest in eight (8) equal quarterly installments thereafter.

F8 · derivative.expiration_date: RSU vest as to thirty-three percent (33%) of the total number of shares subject to the RSU on 5/15/2024, and the remaining shares shall vest in eight (8) equal quarterly installments thereafter.

SEC source: 0001438133-24-000192 · wk-form4_1724113906.xml · derivative · entry 6

Hansen Shannon Marie · CIK 0001908267 · EVP & Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,184

Underlying: Common Stock · 531 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.

F3 · security: Awarded on February 15, 2022 pursuant to the Tandem Diabetes Care, Inc. 2013 Stock Incentive Plan, as amended, and the agreements related thereto (the 2013 Plan).

F4 · derivative.exercise_price: Each 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.

F5 · derivative.exercise_date: RSU vest as to twenty-five percent (25%) of the total number of shares subject to the RSU on 2/15/2023, and the remaining shares shall vest in twelve (12) equal quarterly installments thereafter.

F5 · derivative.expiration_date: RSU vest as to twenty-five percent (25%) of the total number of shares subject to the RSU on 2/15/2023, and the remaining shares shall vest in twelve (12) equal quarterly installments thereafter.

SEC source: 0001438133-24-000192 · wk-form4_1724113906.xml · nonDerivative · entry 4

Hansen Shannon Marie · CIK 0001908267 · EVP & Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,678

F1 · kind: Shares withheld by Tandem Diabetes Care, Inc. (the Company) to satisfy tax withholding requirements on vesting of restricted stock units (RSU). No shares were sold.

SEC source: 0001438133-24-000192 · wk-form4_1724113906.xml · nonDerivative · entry 3

Hansen Shannon Marie · CIK 0001908267 · EVP & Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,191

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.

SEC source: 0001438133-24-000192 · wk-form4_1724113906.xml · nonDerivative · entry 2

Hansen Shannon Marie · CIK 0001908267 · EVP & Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,754

F1 · kind: Shares withheld by Tandem Diabetes Care, Inc. (the Company) to satisfy tax withholding requirements on vesting of restricted stock units (RSU). No shares were sold.

SEC source: 0001438133-24-000192 · wk-form4_1724113906.xml · nonDerivative · entry 1

Hansen Shannon Marie · CIK 0001908267 · EVP & Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,944

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.

SEC source: 0001438133-24-000136 · wk-form4_1716936204.xml · derivative · entry 4

Hansen Shannon Marie · CIK 0001908267 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,160

Underlying: Common Stock · 13,160 shares

Expires not disclosed

F4 · derivative.exercise_price: Each performance stock unit (PSU) represents a contingent right to receive one share of Tandem Diabetes Care, Inc. (the Company) common stock based upon the achievement of certain pre-defined performance metrics as of December 31, 2026 (the Measurement Date). The number of shares issued may range from 0% to 200% of the amount specified above, based upon (i) Company's actual performance relative to the pre-defined performance metrics, and (ii) subject to the awardee's continuing service through the Measurement Date. If minimum performance metrics are not met, no PSUs will vest.

F4 · derivative.exercise_date: Each performance stock unit (PSU) represents a contingent right to receive one share of Tandem Diabetes Care, Inc. (the Company) common stock based upon the achievement of certain pre-defined performance metrics as of December 31, 2026 (the Measurement Date). The number of shares issued may range from 0% to 200% of the amount specified above, based upon (i) Company's actual performance relative to the pre-defined performance metrics, and (ii) subject to the awardee's continuing service through the Measurement Date. If minimum performance metrics are not met, no PSUs will vest.

F4 · derivative.expiration_date: Each performance stock unit (PSU) represents a contingent right to receive one share of Tandem Diabetes Care, Inc. (the Company) common stock based upon the achievement of certain pre-defined performance metrics as of December 31, 2026 (the Measurement Date). The number of shares issued may range from 0% to 200% of the amount specified above, based upon (i) Company's actual performance relative to the pre-defined performance metrics, and (ii) subject to the awardee's continuing service through the Measurement Date. If minimum performance metrics are not met, no PSUs will vest.

SEC source: 0001438133-24-000136 · wk-form4_1716936204.xml · derivative · entry 3

Hansen Shannon Marie · CIK 0001908267 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,161

Underlying: Common Stock · 13,161 shares

Expires not disclosed

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 vest as to thirty-three percent (33%) of the total number of shares subject to the RSU on 5/15/2025, and the remaining shares shall vest in eight (8) equal quarterly installments thereafter.

F3 · derivative.expiration_date: RSU vest as to thirty-three percent (33%) of the total number of shares subject to the RSU on 5/15/2025, and the remaining shares shall vest in eight (8) equal quarterly installments thereafter.

SEC source: 0001438133-24-000098 · wk-form4_1715982367.xml · derivative · entry 8

Hansen Shannon Marie · CIK 0001908267 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,497

Underlying: Common Stock · 5,748 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.

F7 · security: Awarded on May 25, 2023 pursuant to the Tandem Diabetes Care, Inc. 2023 Long-Term Incentive Plan (the 2023 Plan).

F8 · derivative.exercise_price: Each 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.

F9 · derivative.exercise_date: RSU vest as to thirty-three percent (33%) of the total number of shares subject to the RSU on 5/15/2024, and the remaining shares shall vest in eight (8) equal quarterly installments thereafter.

F9 · derivative.expiration_date: RSU vest as to thirty-three percent (33%) of the total number of shares subject to the RSU on 5/15/2024, and the remaining shares shall vest in eight (8) equal quarterly installments thereafter.

SEC source: 0001438133-24-000098 · wk-form4_1715982367.xml · derivative · entry 7

Hansen Shannon Marie · CIK 0001908267 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,715

Underlying: Common Stock · 531 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 February 15, 2022 pursuant to the Tandem Diabetes Care, Inc. 2013 Stock Incentive Plan, as amended, and the agreements related thereto (the 2013 Plan).

F5 · derivative.exercise_price: Each 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.

F6 · derivative.exercise_date: RSU vest as to twenty-five percent (25%) of the total number of shares subject to the RSU on 2/15/2023, and the remaining shares shall vest in twelve (12) equal quarterly installments thereafter.

F6 · derivative.expiration_date: RSU vest as to twenty-five percent (25%) of the total number of shares subject to the RSU on 2/15/2023, and the remaining shares shall vest in twelve (12) equal quarterly installments thereafter.

SEC source: 0001438133-24-000098 · wk-form4_1715982367.xml · nonDerivative · entry 5

Hansen Shannon Marie · CIK 0001908267 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,413

F2 · kind: Shares withheld by Tandem Diabetes Care, Inc. (the Company) to satisfy tax withholding requirements on vesting of restricted stock units (RSU). No shares were sold.

SEC source: 0001438133-24-000098 · wk-form4_1715982367.xml · nonDerivative · entry 4

Hansen Shannon Marie · CIK 0001908267 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,464

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.

SEC source: 0001438133-24-000098 · wk-form4_1715982367.xml · nonDerivative · entry 3

Hansen Shannon Marie · CIK 0001908267 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,716

F2 · kind: Shares withheld by Tandem Diabetes Care, Inc. (the Company) to satisfy tax withholding requirements on vesting of restricted stock units (RSU). No shares were sold.

SEC source: 0001438133-24-000098 · wk-form4_1715982367.xml · nonDerivative · entry 2

Hansen Shannon Marie · CIK 0001908267 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,906

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.

SEC source: 0001438133-24-000098 · wk-form4_1715982367.xml · nonDerivative · entry 1

Hansen Shannon Marie · CIK 0001908267 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,375

F1 · shares: The reporting person is voluntarily reporting the acquisition of shares of common stock pursuant to the Tandem Diabetes Care, Inc. Amended and Restated 2013 Employee Stock Purchase Plan (ESPP), for the ESPP purchase period of November 16, 2023 through May 15, 2024. This transaction is also exempt under Rule 16b-3(c).

SEC source: 0001438133-24-000010 · wk-form4_1708475152.xml · derivative · entry 4

Hansen Shannon Marie · CIK 0001908267 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,246

Underlying: Common Stock · 531 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.

F3 · security: Awarded on February 15, 2022 pursuant to the Tandem Diabetes Care, Inc. 2013 Stock Incentive Plan, as amended, and the agreements related thereto (the 2013 Plan).

F4 · derivative.exercise_price: Each 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.

F5 · derivative.exercise_date: RSU vest as to twenty-five percent (25%) of the total number of shares subject to the RSU on the 15th day of the month that corresponds to the anniversary of the grant date, and the remaining shares shall vest in twelve (12) equal quarterly installments thereafter, subject to the terms of the 2013 Plan.

F5 · derivative.expiration_date: RSU vest as to twenty-five percent (25%) of the total number of shares subject to the RSU on the 15th day of the month that corresponds to the anniversary of the grant date, and the remaining shares shall vest in twelve (12) equal quarterly installments thereafter, subject to the terms of the 2013 Plan.

SEC source: 0001438133-24-000010 · wk-form4_1708475152.xml · nonDerivative · entry 2

Hansen Shannon Marie · CIK 0001908267 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,576

F1 · kind: Shares withheld by Tandem Diabetes Care, Inc. (the Company) to satisfy tax withholding requirements on vesting of restricted stock units (RSU). No shares were sold.

SEC source: 0001438133-24-000010 · wk-form4_1708475152.xml · nonDerivative · entry 1

Hansen Shannon Marie · CIK 0001908267 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,794

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.

SEC source: 0001438133-23-000229 · wk-form4_1700255415.xml · derivative · entry 4

Hansen Shannon Marie · CIK 0001908267 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,777

Underlying: Common Stock · 530 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.

F3 · security: Awarded on February 15, 2022 pursuant to the Tandem Diabetes Care, Inc. 2013 Stock Incentive Plan, as amended, and the agreements related thereto (the 2013 Plan).

F4 · derivative.exercise_price: Each 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.

F5 · derivative.exercise_date: RSU vest as to twenty-five percent (25%) of the total number of shares subject to the RSU on the 15th day of the month that corresponds to the anniversary of the grant date, and the remaining shares shall vest in twelve (12) equal quarterly installments thereafter, subject to the terms of the 2013 Plan.

F5 · derivative.expiration_date: RSU vest as to twenty-five percent (25%) of the total number of shares subject to the RSU on the 15th day of the month that corresponds to the anniversary of the grant date, and the remaining shares shall vest in twelve (12) equal quarterly installments thereafter, subject to the terms of the 2013 Plan.

SEC source: 0001438133-23-000229 · wk-form4_1700255415.xml · nonDerivative · entry 2

Hansen Shannon Marie · CIK 0001908267 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,263

F1 · kind: Shares withheld by Tandem Diabetes Care, Inc. (the Company) to satisfy tax withholding requirements on vesting of restricted stock units (RSU). No shares were sold.

SEC source: 0001438133-23-000229 · wk-form4_1700255415.xml · nonDerivative · entry 1

Hansen Shannon Marie · CIK 0001908267 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,447

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.

SEC source: 0001438133-23-000213 · wk-form4_1699911073.xml · nonDerivative · entry 1

Hansen Shannon Marie · CIK 0001908267 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · Shannon M. Hansen Trust

Disclosed balance after: 1,935

F1 · ownership.nature: The securities are held by the Shannon M. Hansen Trust dated July 8, 2003, of which Shannon M. Hansen is the Trustee.

SEC source: 0001438133-23-000161 · wk-form4_1692303333.xml · derivative · entry 3

Hansen Shannon Marie · CIK 0001908267 · SVP & General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,307

Underlying: Common Stock · 531 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.

F2 · security: Awarded on February 15, 2022 pursuant to the Tandem Diabetes Care, Inc. 2013 Stock Incentive Plan, as amended, and the agreements related thereto (the 2013 Plan).

F3 · derivative.exercise_price: Each 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.

F4 · derivative.exercise_date: RSU vest as to twenty-five percent (25%) of the total number of shares subject to the RSU on 2/15/2023, and the remaining shares shall vest in twelve (12) equal quarterly installments thereafter.

F4 · derivative.expiration_date: RSU vest as to twenty-five percent (25%) of the total number of shares subject to the RSU on 2/15/2023, and the remaining shares shall vest in twelve (12) equal quarterly installments thereafter.

SEC source: 0001438133-23-000161 · wk-form4_1692303333.xml · nonDerivative · entry 2

Hansen Shannon Marie · CIK 0001908267 · SVP & General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,917

F1 · kind: Shares withheld by Tandem Diabetes Care, Inc. (the Company) to satisfy tax withholding requirements on vesting of restricted stock units (RSU). No shares were sold.

SEC source: 0001438133-23-000161 · wk-form4_1692303333.xml · nonDerivative · entry 1

Hansen Shannon Marie · CIK 0001908267 · SVP & General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,101

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.

SEC source: 0001438133-23-000131 · wf-form4_168549730201786.xml · derivative · entry 2

Hansen Shannon Marie · CIK 0001908267 · SVP & General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,245

Underlying: Common Stock · 17,245 shares

Expires not disclosed

F1 · security: Awarded on May 25, 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 vest as to thiry-three percent (33%) of the total number of shares subject to the RSU on 5/15/2024, and the remaining shares shall vest in eight (8) equal quarterly installments thereafter.

F3 · derivative.expiration_date: RSU vest as to thiry-three percent (33%) of the total number of shares subject to the RSU on 5/15/2024, and the remaining shares shall vest in eight (8) equal quarterly installments thereafter.

SEC source: 0001438133-23-000085 · wf-form4_168436177153029.xml · derivative · entry 4

Hansen Shannon Marie · CIK 0001908267 · SVP & General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,838

Underlying: Common Stock · 531 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.

F3 · derivative.exercise_price: Each 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 Tandem Diabetes Care, Inc. 2013 Stock Incentive Plan (the 2013 Plan).

F4 · derivative.exercise_date: RSU granted on 2/15/2022 vest as to twenty-five percent (25%) of the total number of shares subject to the RSU on the 15th day of the month that corresponds to the anniversary of the grant date, and the remaining shares shall vest in twelve (12) equal quarterly installments thereafter, subject to the terms of the 2013 Plan.

F4 · derivative.expiration_date: RSU granted on 2/15/2022 vest as to twenty-five percent (25%) of the total number of shares subject to the RSU on the 15th day of the month that corresponds to the anniversary of the grant date, and the remaining shares shall vest in twelve (12) equal quarterly installments thereafter, subject to the terms of the 2013 Plan.

SEC source: 0001438133-23-000085 · wf-form4_168436177153029.xml · nonDerivative · entry 3

Hansen Shannon Marie · CIK 0001908267 · SVP & General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,570

F2 · kind: Shares withheld by Tandem Diabetes Care, Inc. (the Company) to satisfy tax withholding requirements on vesting of restricted stock units (RSU). No shares were sold.

SEC source: 0001438133-23-000085 · wf-form4_168436177153029.xml · nonDerivative · entry 2

Hansen Shannon Marie · CIK 0001908267 · SVP & General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,754

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.

SEC source: 0001438133-23-000085 · wf-form4_168436177153029.xml · nonDerivative · entry 1

Hansen Shannon Marie · CIK 0001908267 · SVP & General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,223

F1 · shares: The reporting person is voluntarily reporting the acquisition of shares of common stock pursuant to the Tandem Diabetes Care, Inc. Amended and Restated 2013 Employee Stock Purchase Plan (ESPP), for the ESPP purchase period of November 16, 2022 through May 15, 2023. This transaction is also exempt under Rule 16b-3(c).

SEC source: 0001438133-23-000016 · wf-form4_167667099763678.xml · derivative · entry 3

Hansen Shannon Marie · CIK 0001908267 · SVP & General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,369

Underlying: Common Stock · 2,123 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.

F2 · security: Granted pursuant to the Tandem Diabetes Care, Inc. 2013 Stock Incentive Plan (the "2013 Plan").

F3 · derivative.exercise_price: Each 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.

F4 · derivative.exercise_date: RSU granted on 2/15/2022 vest as to twenty-five percent (25%) of the total number of shares subject to the RSU on the one year anniversary of the grant date, and the remaining shares shall vest in twelve(12)equal quarterly installments thereafter, subject to the terms of the 2013 Plan.

F4 · derivative.expiration_date: RSU granted on 2/15/2022 vest as to twenty-five percent (25%) of the total number of shares subject to the RSU on the one year anniversary of the grant date, and the remaining shares shall vest in twelve(12)equal quarterly installments thereafter, subject to the terms of the 2013 Plan.