TNDM

SEC source: 0001438133-22-000083 · wf-form4_165291570067006.xml · nonDerivative · entry 2

Vosseller Leigh · CIK 0001726322 · EVP & CHIEF FINANCIAL OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,043

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: 0001438133-22-000083 · wf-form4_165291570067006.xml · nonDerivative · entry 1

Vosseller Leigh · CIK 0001726322 · EVP & CHIEF FINANCIAL OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,268

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: 0001438133-22-000081 · wf-form4_165291548849605.xml · derivative · entry 4

Morrison Susan · CIK 0001582970 · EVP & Chief Admin. Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,949

Underlying: Common Stock · 650 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: Granted pursuant to the Tandem Diabetes Care, Inc. 2013 Stock Incentive Plan (the 2013 Plan).

F4 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of common stock of the Company.

F5 · derivative.exercise_date: RSU vest as to twenty-five percent (25%) of the total number of shares subject to the RSU on 5/15/2022, 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 5/15/2022, and the remaining shares shall vest in twelve (12) equal quarterly installments thereafter.

SEC source: 0001438133-22-000081 · wf-form4_165291548849605.xml · nonDerivative · entry 3

Morrison Susan · CIK 0001582970 · EVP & Chief Admin. Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,376

F2 · 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, 2021 through May 16, 2022. This transaction is also exempt under Rule 16b-3(c).

SEC source: 0001438133-22-000081 · wf-form4_165291548849605.xml · nonDerivative · entry 2

Morrison Susan · CIK 0001582970 · EVP & Chief Admin. Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,070

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: 0001438133-22-000081 · wf-form4_165291548849605.xml · nonDerivative · entry 1

Morrison Susan · CIK 0001582970 · EVP & Chief Admin. Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,256

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: 0001438133-22-000079 · wf-form4_165291533790049.xml · derivative · entry 5

BERGER DAVID B · CIK 0001422126 · EVP & Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,949

Underlying: Common Stock · 650 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: Granted pursuant to the Tandem Diabetes Care, Inc. 2013 Stock Incentive Plan (the 2013 Plan).

F5 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of common stock of the Company.

F6 · derivative.exercise_date: RSU vest as to twenty-five percent (25%) of the total number of shares subject to the RSU on 5/15/2022, 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 5/15/2022, and the remaining shares shall vest in twelve (12) equal quarterly installments thereafter.

SEC source: 0001438133-22-000079 · wf-form4_165291533790049.xml · nonDerivative · entry 3

BERGER DAVID B · CIK 0001422126 · EVP & Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,350

F2 · 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, 2021 through May 16, 2022. This transaction is also exempt under Rule 16b-3(c).

SEC source: 0001438133-22-000079 · wf-form4_165291533790049.xml · nonDerivative · entry 2

BERGER DAVID B · CIK 0001422126 · EVP & Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,044

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: 0001438133-22-000079 · wf-form4_165291533790049.xml · nonDerivative · entry 1

BERGER DAVID B · CIK 0001422126 · EVP & Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,367

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: 0001438133-22-000077 · wf-form4_165291302105814.xml · derivative · entry 4

Sheridan John F · CIK 0001365369 · Director · PRESIDENT & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,509

Underlying: Common Stock · 3,170 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: Granted pursuant to the Tandem Diabetes Care, Inc. 2013 Stock Incentive Plan (the 2013 Plan).

F4 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of common stock of the Company.

F5 · derivative.exercise_date: RSU vest as to twenty-five percent (25%) of the total number of shares subject to the RSU on 5/15/2022, 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 5/15/2022, and the remaining shares shall vest in twelve (12) equal quarterly installments thereafter.

SEC source: 0001438133-22-000077 · wf-form4_165291302105814.xml · nonDerivative · entry 3

Sheridan John F · CIK 0001365369 · Director · PRESIDENT & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,962

F2 · 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, 2021 through May 16, 2022. This transaction is also exempt under Rule 16b-3(c).

SEC source: 0001438133-22-000077 · wf-form4_165291302105814.xml · nonDerivative · entry 2

Sheridan John F · CIK 0001365369 · Director · PRESIDENT & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,656

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: 0001438133-22-000077 · wf-form4_165291302105814.xml · nonDerivative · entry 1

Sheridan John F · CIK 0001365369 · Director · PRESIDENT & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,228

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: 0001438133-22-000075 · wf-form4_165291285440752.xml · derivative · entry 4

HANSEN BRIAN B · CIK 0001542377 · EVP & CHIEF COMMERCIAL OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,949

Underlying: Common Stock · 650 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: Granted pursuant to the Tandem Diabetes Care, Inc. 2013 Stock Incentive Plan (the 2013 Plan).

F4 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of common stock of the Company.

F5 · derivative.exercise_date: RSU vest as to twenty-five percent (25%) of the total number of shares subject to the RSU on 5/15/2022, 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 5/15/2022, and the remaining shares shall vest in twelve (12) equal quarterly installments thereafter.

SEC source: 0001438133-22-000075 · wf-form4_165291285440752.xml · nonDerivative · entry 3

HANSEN BRIAN B · CIK 0001542377 · EVP & CHIEF COMMERCIAL OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,552

F2 · 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, 2021 through May 16, 2022. This transaction is also exempt under Rule 16b-3(c).

SEC source: 0001438133-22-000075 · wf-form4_165291285440752.xml · nonDerivative · entry 2

HANSEN BRIAN B · CIK 0001542377 · EVP & CHIEF COMMERCIAL OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,246

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: 0001438133-22-000075 · wf-form4_165291285440752.xml · nonDerivative · entry 1

HANSEN BRIAN B · CIK 0001542377 · EVP & CHIEF COMMERCIAL OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,457

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: 0001438133-22-000071 · wf-form4_165222268446211.xml · nonDerivative · entry 3

Vosseller Leigh · CIK 0001726322 · EVP & CHIEF FINANCIAL OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,118

SEC source: 0001438133-22-000069 · wf-form4_165222182407957.xml · nonDerivative · entry 1

Sheridan John F · CIK 0001365369 · Director · PRESIDENT & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,058

SEC source: 0001438133-22-000071 · wf-form4_165222268446211.xml · nonDerivative · entry 2

Vosseller Leigh · CIK 0001726322 · EVP & CHIEF FINANCIAL OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,618

SEC source: 0001438133-22-000071 · wf-form4_165222268446211.xml · nonDerivative · entry 1

Vosseller Leigh · CIK 0001726322 · EVP & CHIEF FINANCIAL OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,618

SEC source: 0001438133-22-000067 · wf-form4_165222139396227.xml · nonDerivative · entry 6

Howell Peyton R · CIK 0001528056 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,948

SEC source: 0001438133-22-000067 · wf-form4_165222139396227.xml · nonDerivative · entry 5

Howell Peyton R · CIK 0001528056 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,465

SEC source: 0001438133-22-000067 · wf-form4_165222139396227.xml · nonDerivative · entry 4

Howell Peyton R · CIK 0001528056 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,965

SEC source: 0001438133-22-000067 · wf-form4_165222139396227.xml · nonDerivative · entry 3

Howell Peyton R · CIK 0001528056 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,565

SEC source: 0001438133-22-000067 · wf-form4_165222139396227.xml · nonDerivative · entry 2

Howell Peyton R · CIK 0001528056 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,065

SEC source: 0001438133-22-000067 · wf-form4_165222139396227.xml · nonDerivative · entry 1

Howell Peyton R · CIK 0001528056 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,048

SEC source: 0001438133-22-000065 · wf-form4_165221619881112.xml · derivative · entry 7

TWOMEY CHRISTOPHER J · CIK 0001238935 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 0

Underlying: Common Stock · 238 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 · derivative.expiration_date: The expiration date for this warrant is August 31, 2022.

F2 · ownership.nature: The securities are held by the Chris J. Twomey and Rebecca J. Twomey Family Trust UTD September 20, 2002.

SEC source: 0001438133-22-000065 · wf-form4_165221619881112.xml · derivative · entry 6

TWOMEY CHRISTOPHER J · CIK 0001238935 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

Underlying: Common Stock · 135 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 · derivative.expiration_date: The expiration date for this warrant is August 31, 2022.

F3 · ownership.nature: The securities are directly owned by Twomey Family Investments, LLC. The Reporting Person is co-manager of Twomey Family Investments, LLC and shares voting and investment power over the securities held by Twomey Family Investments, LLC and may be deemed to have indirect beneficial ownership of such shares. The Reporting Person disclaims beneficial ownership of such securities held by Twomey Family Investments, LLC, except to the extent of his proportionate pecuniary interest therein.

SEC source: 0001438133-22-000065 · wf-form4_165221619881112.xml · nonDerivative · entry 4

TWOMEY CHRISTOPHER J · CIK 0001238935 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 7,568

F1 · kind: The transaction reflects the cashless exercise of warrants to purchase common stock, at an exercise price of $73.726. Pursuant to the terms of the warrant, the shares of common stock were sold at a price equal to the average of the closing prices of the shares over the 30-day period ending three days prior to the date on which the notice of exercise was received by the Issuer.

F3 · ownership.nature: The securities are directly owned by Twomey Family Investments, LLC. The Reporting Person is co-manager of Twomey Family Investments, LLC and shares voting and investment power over the securities held by Twomey Family Investments, LLC and may be deemed to have indirect beneficial ownership of such shares. The Reporting Person disclaims beneficial ownership of such securities held by Twomey Family Investments, LLC, except to the extent of his proportionate pecuniary interest therein.

SEC source: 0001438133-22-000065 · wf-form4_165221619881112.xml · nonDerivative · entry 3

TWOMEY CHRISTOPHER J · CIK 0001238935 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 5,112

F1 · kind: The transaction reflects the cashless exercise of warrants to purchase common stock, at an exercise price of $73.726. Pursuant to the terms of the warrant, the shares of common stock were sold at a price equal to the average of the closing prices of the shares over the 30-day period ending three days prior to the date on which the notice of exercise was received by the Issuer.

F2 · ownership.nature: The securities are held by the Chris J. Twomey and Rebecca J. Twomey Family Trust UTD September 20, 2002.

SEC source: 0001438133-22-000065 · wf-form4_165221619881112.xml · nonDerivative · entry 2

TWOMEY CHRISTOPHER J · CIK 0001238935 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 7,658

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 · kind: The transaction reflects the cashless exercise of warrants to purchase common stock, at an exercise price of $73.726. Pursuant to the terms of the warrant, the shares of common stock were sold at a price equal to the average of the closing prices of the shares over the 30-day period ending three days prior to the date on which the notice of exercise was received by the Issuer.

F3 · ownership.nature: The securities are directly owned by Twomey Family Investments, LLC. The Reporting Person is co-manager of Twomey Family Investments, LLC and shares voting and investment power over the securities held by Twomey Family Investments, LLC and may be deemed to have indirect beneficial ownership of such shares. The Reporting Person disclaims beneficial ownership of such securities held by Twomey Family Investments, LLC, except to the extent of his proportionate pecuniary interest therein.

SEC source: 0001438133-22-000065 · wf-form4_165221619881112.xml · nonDerivative · entry 1

TWOMEY CHRISTOPHER J · CIK 0001238935 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 5,270

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 · kind: The transaction reflects the cashless exercise of warrants to purchase common stock, at an exercise price of $73.726. Pursuant to the terms of the warrant, the shares of common stock were sold at a price equal to the average of the closing prices of the shares over the 30-day period ending three days prior to the date on which the notice of exercise was received by the Issuer.

F2 · ownership.nature: The securities are held by the Chris J. Twomey and Rebecca J. Twomey Family Trust UTD September 20, 2002.

SEC source: 0001438133-22-000062 · wf-form4_165169807583447.xml · derivative · entry 4

ROBERTSON REBECCA B · CIK 0001201585 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 31,892

Underlying: Common Stock · 1,500 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.

F5 · derivative.exercise_date: The option shall vest in 36 equal monthly installments from January 2, 2019, subject to the terms of Tandem Diabetes Care, Inc. 2013 Stock Incentive Plan, as amended, and the agreements related thereto (the "2013 Plan").

F6 · derivative.expiration_date: The expiration date for these options is 10 years from the date of grant.

SEC source: 0001438133-22-000062 · wf-form4_165169807583447.xml · nonDerivative · entry 3

ROBERTSON REBECCA B · CIK 0001201585 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F2 · kind: The shares were sold pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 26, 2021.

F4 · price: The price reported reflects the weighted average price per share of multiple transactions with prices per share ranging between $96.77 to $97.37. The Reporting Person undertakes to provide the SEC, the issuer, and any security holder full information regarding the number of shares and the prices at which the shares were sold.

SEC source: 0001438133-22-000062 · wf-form4_165169807583447.xml · nonDerivative · entry 2

ROBERTSON REBECCA B · CIK 0001201585 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 967

F2 · kind: The shares were sold pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 26, 2021.

F3 · price: The price reported reflects the weighted average price per share of multiple transactions with prices per share ranging between $95.60 to $96.51. The Reporting Person undertakes to provide the Securities and Exchange Commission (the "SEC"), the issuer, and any security holder full information regarding the number of shares and the prices at which the shares were sold.

SEC source: 0001438133-22-000062 · wf-form4_165169807583447.xml · nonDerivative · entry 1

ROBERTSON REBECCA B · CIK 0001201585 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,500

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 · kind: Represents shares of common stock received upon exercise of a stock option award.

SEC source: 0001438133-22-000046 · wf-form4_164919133994445.xml · derivative · entry 4

BERGER DAVID B · CIK 0001422126 · EVP & Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 42,000

Underlying: Common Stock · 1,000 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.

F5 · derivative.exercise_date: The options vested as to fifty (50%) of the underlying shares on 6/14/2019, and the remaining shares vested in twelve (12) equal monthly installments thereafter, subject to the terms of Tandem Diabetes Care, Inc. 2013 Stock Incentive Plan (the 2013 Plan).

F6 · derivative.expiration_date: The expiration date for these options is 10 years from the date of grant.

SEC source: 0001438133-22-000046 · wf-form4_164919133994445.xml · nonDerivative · entry 2

BERGER DAVID B · CIK 0001422126 · EVP & Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,717

F2 · kind: The shares were sold pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 11, 2021.

F3 · price: The price reported reflects the weighted average price per share of multiple transactions with prices per share ranging between $117.77 to $118.39. The Reporting Person undertakes to provide the Securities and Exchange Commission (the "SEC"), the issuer, and any security holder full information regarding the number of shares and the prices at which the shares were sold.

SEC source: 0001438133-22-000046 · wf-form4_164919133994445.xml · nonDerivative · entry 1

BERGER DAVID B · CIK 0001422126 · EVP & Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,717

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 · kind: Represents shares of common stock received upon exercise of a stock option award.

SEC source: 0001438133-22-000041 · wf-form4_164790157987932.xml · derivative · entry 4

BERGER DAVID B · CIK 0001422126 · EVP & Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 43,000

Underlying: Common Stock · 5,000 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_date: The options vested as to fifty (50%) of the underlying shares on 6/14/2019, and the remaining shares vested in twelve (12) equal monthly installments thereafter, subject to the terms of the 2013 Plan.

F4 · derivative.expiration_date: The expiration date for these options is 10 years from the date of grant.

SEC source: 0001438133-22-000041 · wf-form4_164790157987932.xml · nonDerivative · entry 2

BERGER DAVID B · CIK 0001422126 · EVP & Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,717

F1 · price: The price reported reflects the weighted average price per share of multiple transactions with prices per share ranging between $108.23 to $108.76. The Reporting Person undertakes to provide the Securities and Exchange Commission (the "SEC"), the issuer, and any security holder full information regarding the number of shares and the prices at which the shares were sold.

SEC source: 0001438133-22-000041 · wf-form4_164790157987932.xml · nonDerivative · entry 1

BERGER DAVID B · CIK 0001422126 · EVP & Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,717

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: 0001438133-22-000039 · wf-form4_164746452290623.xml · nonDerivative · entry 1

McGroddy-Goetz Kathleen · CIK 0001814371 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 814

SEC source: 0001438133-22-000035 · wf-form4_164626752716756.xml · derivative · entry 7

BERGER DAVID B · CIK 0001422126 · EVP & Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 48,000

Underlying: Common Stock · 1,000 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.

F8 · derivative.exercise_date: The options vested as to fifty (50%) of the underlying shares on 6/14/2019, and the remaining shares vested in twelve (12) equal monthly installments thereafter, subject to the terms of the 2013 Plan.

F9 · derivative.expiration_date: The expiration date for these options is 10 years from the date of grant.

SEC source: 0001438133-22-000035 · wf-form4_164626752716756.xml · nonDerivative · entry 4

BERGER DAVID B · CIK 0001422126 · EVP & Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,717

F3 · kind: The shares were sold pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 11, 2021.

SEC source: 0001438133-22-000035 · wf-form4_164626752716756.xml · nonDerivative · entry 3

BERGER DAVID B · CIK 0001422126 · EVP & Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,717

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 · kind: Represents shares of common stock received upon exercise of a stock option award.

SEC source: 0001438133-22-000025 · wf-form4_164626619341736.xml · derivative · entry 3

Leal James · CIK 0001866570 · SVP, Operations

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,787

Underlying: Common Stock · 310 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 one share of common stock of the Company.

F4 · derivative.exercise_date: RSU vested as to twenty-five percent (25%) of the total number of shares subject to the RSU on 5/27/2021, and the remaining shares shall vest in twelve (12) equal quarterly installments thereafter.

F4 · derivative.expiration_date: RSU vested as to twenty-five percent (25%) of the total number of shares subject to the RSU on 5/27/2021, and the remaining shares shall vest in twelve (12) equal quarterly installments thereafter.

SEC source: 0001438133-22-000025 · wf-form4_164626619341736.xml · nonDerivative · entry 2

Leal James · CIK 0001866570 · SVP, Operations

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,170

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