DXCM

SEC source: 0001093557-21-000223 · edgardoc.xml · nonDerivative · entry 9

Balo Andrew K · CIK 0001323190 · *

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 10,064

F5 · shares: On March 5, 2021, Mr. Balo adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Balo. The shares set forth above were sold pursuant to the 10b5-1 Plan.

F9 · price: This transaction was executed in multiple trades at prices ranging from $547.80 to $548.65. The price above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.

F3 · ownership.nature: Shares are held by the Balo Family Trust U/A/D 4/6/2006, with respect to which the reporting person is a trustee.

SEC source: 0001093557-21-000223 · edgardoc.xml · nonDerivative · entry 8

Balo Andrew K · CIK 0001323190 · *

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 10,814

F5 · shares: On March 5, 2021, Mr. Balo adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Balo. The shares set forth above were sold pursuant to the 10b5-1 Plan.

F8 · price: This transaction was executed in multiple trades at prices ranging from $546.745 to $547.740. The price above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.

F3 · ownership.nature: Shares are held by the Balo Family Trust U/A/D 4/6/2006, with respect to which the reporting person is a trustee.

SEC source: 0001093557-21-000223 · edgardoc.xml · nonDerivative · entry 7

Balo Andrew K · CIK 0001323190 · *

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 11,364

F5 · shares: On March 5, 2021, Mr. Balo adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Balo. The shares set forth above were sold pursuant to the 10b5-1 Plan.

F3 · ownership.nature: Shares are held by the Balo Family Trust U/A/D 4/6/2006, with respect to which the reporting person is a trustee.

SEC source: 0001093557-21-000223 · edgardoc.xml · nonDerivative · entry 6

Balo Andrew K · CIK 0001323190 · *

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 11,414

F5 · shares: On March 5, 2021, Mr. Balo adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Balo. The shares set forth above were sold pursuant to the 10b5-1 Plan.

F7 · price: This transaction was executed in multiple trades at prices ranging from $542.55 to $543.40. The price above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.

F3 · ownership.nature: Shares are held by the Balo Family Trust U/A/D 4/6/2006, with respect to which the reporting person is a trustee.

SEC source: 0001093557-21-000223 · edgardoc.xml · nonDerivative · entry 5

Balo Andrew K · CIK 0001323190 · *

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 11,614

F5 · shares: On March 5, 2021, Mr. Balo adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Balo. The shares set forth above were sold pursuant to the 10b5-1 Plan.

F6 · price: This transaction was executed in multiple trades at prices ranging from $541.27 to $541.36. The price above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.

F3 · ownership.nature: Shares are held by the Balo Family Trust U/A/D 4/6/2006, with respect to which the reporting person is a trustee.

SEC source: 0001093557-21-000223 · edgardoc.xml · nonDerivative · entry 4

Balo Andrew K · CIK 0001323190 · *

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 11,887

F4 · shares: Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of RSUs. This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

F3 · ownership.nature: Shares are held by the Balo Family Trust U/A/D 4/6/2006, with respect to which the reporting person is a trustee.

SEC source: 0001093557-21-000223 · edgardoc.xml · nonDerivative · entry 3

Balo Andrew K · CIK 0001323190 · *

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 11,902

F4 · shares: Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of RSUs. This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

F3 · ownership.nature: Shares are held by the Balo Family Trust U/A/D 4/6/2006, with respect to which the reporting person is a trustee.

SEC source: 0001093557-21-000223 · edgardoc.xml · nonDerivative · entry 2

Balo Andrew K · CIK 0001323190 · *

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 13,150

F1 · shares: Shares were transferred from direct ownership to ownership under the Balo Family Trust upon vesting of previously awarded restricted stock units.

F3 · ownership.nature: Shares are held by the Balo Family Trust U/A/D 4/6/2006, with respect to which the reporting person is a trustee.

SEC source: 0001093557-21-000223 · edgardoc.xml · nonDerivative · entry 1

Balo Andrew K · CIK 0001323190 · *

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,056

F1 · shares: Shares were transferred from direct ownership to ownership under the Balo Family Trust upon vesting of previously awarded restricted stock units.

F2 · balance_after: Included in this number are 13,673 unvested restricted stock units, 5,301 of which were granted on March 8, 2021 and shall vest through March 8, 2024, 5,874 of which were granted on March 8, 2020 and shall vest through March 8, 2023, and 2,498 of which were granted on March 8, 2019 and shall vest through March 8, 2022.

SEC source: 0001093557-21-000219 · edgardoc.xml · nonDerivative · entry 2

Shrishrimal Sumi · CIK 0001850687 · SVP Chief Risk Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,234

F1 · shares: Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of RSUs. This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

F2 · balance_after: Included in this number are 6,749 unvested restricted stock units, 3,073 of which were granted on March 8, 2021 and shall vest through March 8, 2024, 2,872 of which were granted on March 8, 2020 and shall vest through March 8, 2023, and 804 of which were granted on March 8, 2019 and shall vest through March 8, 2022.

SEC source: 0001093557-21-000219 · edgardoc.xml · nonDerivative · entry 1

Shrishrimal Sumi · CIK 0001850687 · SVP Chief Risk Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,239

F1 · shares: Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of RSUs. This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

F2 · balance_after: Included in this number are 6,749 unvested restricted stock units, 3,073 of which were granted on March 8, 2021 and shall vest through March 8, 2024, 2,872 of which were granted on March 8, 2020 and shall vest through March 8, 2023, and 804 of which were granted on March 8, 2019 and shall vest through March 8, 2022.

SEC source: 0001093557-21-000218 · edgardoc.xml · nonDerivative · entry 2

SAYER KEVIN R · CIK 0001286858 · Director · Chairman, CEO & President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 102,705

F1 · shares: Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of RSUs. This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

F2 · balance_after: Included in this number are 36,385 unvested restricted stock units, 13,445 of which were granted on March 8, 2021 and shall vest through March 8, 2024, 16,968 of which were granted on March 8, 2020 and shall vest through March 8, 2023, and 5,972 of which were granted on March 8, 2019 and shall vest through March 8, 2022.

SEC source: 0001093557-21-000218 · edgardoc.xml · nonDerivative · entry 1

SAYER KEVIN R · CIK 0001286858 · Director · Chairman, CEO & President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 105,687

F1 · shares: Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of RSUs. This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

F2 · balance_after: Included in this number are 36,385 unvested restricted stock units, 13,445 of which were granted on March 8, 2021 and shall vest through March 8, 2024, 16,968 of which were granted on March 8, 2020 and shall vest through March 8, 2023, and 5,972 of which were granted on March 8, 2019 and shall vest through March 8, 2022.

SEC source: 0001093557-21-000217 · edgardoc.xml · nonDerivative · entry 2

Patterson Chad · CIK 0001850152 · EVP, Global Marketing

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,900

F1 · shares: Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of RSUs. This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

F2 · balance_after: Included in this number are 9,603 unvested restricted stock units, 5,634 of which were granted on March 8, 2021 and shall vest through March 8, 2024, 3,394 of which were granted on March 8, 2020 and shall vest through March 8, 2023, and 575 of which were granted on March 8, 2019 and shall vest through March 8, 2022.

SEC source: 0001093557-21-000217 · edgardoc.xml · nonDerivative · entry 1

Patterson Chad · CIK 0001850152 · EVP, Global Marketing

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,904

F1 · shares: Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of RSUs. This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

F2 · balance_after: Included in this number are 9,603 unvested restricted stock units, 5,634 of which were granted on March 8, 2021 and shall vest through March 8, 2024, 3,394 of which were granted on March 8, 2020 and shall vest through March 8, 2023, and 575 of which were granted on March 8, 2019 and shall vest through March 8, 2022.

SEC source: 0001093557-21-000216 · edgardoc.xml · nonDerivative · entry 2

Pacelli Steven Robert · CIK 0001359098 · Managing Dir., Dexcom Ventures

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 47,822

F1 · shares: Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of RSUs. This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

F2 · balance_after: Included in this number are 13,673 unvested restricted stock units, 5,301 of which were granted on March 8, 2021 and shall vest through March 8, 2024, 5,874 of which were granted on March 8, 2020 and shall vest through March 8, 2023, and 2,498 of which were granted on March 8, 2019 and shall vest through March 8, 2022.

SEC source: 0001093557-21-000216 · edgardoc.xml · nonDerivative · entry 1

Pacelli Steven Robert · CIK 0001359098 · Managing Dir., Dexcom Ventures

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 47,837

F1 · shares: Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of RSUs. This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

F2 · balance_after: Included in this number are 13,673 unvested restricted stock units, 5,301 of which were granted on March 8, 2021 and shall vest through March 8, 2024, 5,874 of which were granted on March 8, 2020 and shall vest through March 8, 2023, and 2,498 of which were granted on March 8, 2019 and shall vest through March 8, 2022.

SEC source: 0001093557-21-000215 · edgardoc.xml · nonDerivative · entry 2

Murphy Patrick Michael · CIK 0001692785 · EVP, Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,254

F1 · shares: Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of RSUs. This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

F2 · balance_after: Included in this number are 13,461 unvested restricted stock units, 5,634 of which were granted on March 8, 2021 and shall vest through March 8, 2024, 5,874 of which were granted on March 8, 2020 and shall vest through March 8, 2023, and 1,953 of which were granted on March 8, 2019 and shall vest through March 8, 2022.

SEC source: 0001093557-21-000215 · edgardoc.xml · nonDerivative · entry 1

Murphy Patrick Michael · CIK 0001692785 · EVP, Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,266

F1 · shares: Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of RSUs. This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

F2 · balance_after: Included in this number are 13,461 unvested restricted stock units, 5,634 of which were granted on March 8, 2021 and shall vest through March 8, 2024, 5,874 of which were granted on March 8, 2020 and shall vest through March 8, 2023, and 1,953 of which were granted on March 8, 2019 and shall vest through March 8, 2022.

SEC source: 0001093557-21-000214 · edgardoc.xml · nonDerivative · entry 2

Leach Jacob Steven · CIK 0001700255 · EVP Chief Technology Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 69,322

F1 · shares: Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of RSUs. This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

F2 · balance_after: Included in this number are 17,501 unvested restricted stock units, 7,171 of which were granted on March 8, 2021 and shall vest through March 8, 2024, 7,832 of which were granted on March 8, 2020 and shall vest through March 8, 2023, and 2,498 of which were granted on March 8, 2019 and shall vest through March 8, 2022.

SEC source: 0001093557-21-000214 · edgardoc.xml · nonDerivative · entry 1

Leach Jacob Steven · CIK 0001700255 · EVP Chief Technology Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 69,337

F1 · shares: Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of RSUs. This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

F2 · balance_after: Included in this number are 17,501 unvested restricted stock units, 7,171 of which were granted on March 8, 2021 and shall vest through March 8, 2024, 7,832 of which were granted on March 8, 2020 and shall vest through March 8, 2023, and 2,498 of which were granted on March 8, 2019 and shall vest through March 8, 2022.

SEC source: 0001093557-21-000213 · edgardoc.xml · nonDerivative · entry 2

Flynn Paul R · CIK 0001850141 · EVP, Global Revenue

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,554

F1 · shares: Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of RSUs. This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

F2 · balance_after: Included in this number are 10,928 unvested restricted stock units, 5,634 of which were granted on March 8, 2021 and shall vest through March 8, 2024, 3,916 of which were granted on March 8, 2020 and shall vest through March 8, 2023, and 1,378 of which were granted on March 8, 2019 and shall vest through March 8, 2022.

SEC source: 0001093557-21-000213 · edgardoc.xml · nonDerivative · entry 1

Flynn Paul R · CIK 0001850141 · EVP, Global Revenue

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,563

F1 · shares: Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of RSUs. This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

F2 · balance_after: Included in this number are 10,928 unvested restricted stock units, 5,634 of which were granted on March 8, 2021 and shall vest through March 8, 2024, 3,916 of which were granted on March 8, 2020 and shall vest through March 8, 2023, and 1,378 of which were granted on March 8, 2019 and shall vest through March 8, 2022.

SEC source: 0001093557-21-000212 · edgardoc.xml · nonDerivative · entry 2

Abbey Donald · CIK 0001534342 · EVP Quality and Regulatory Aff

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 48,674

F1 · shares: Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of RSUs. This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

F2 · balance_after: Included in this number are 13,673 restricted stock units, 5,301 of which were granted on March 8, 2021 and shall vest through March 8, 2024, 5,874 of which were granted on March 8, 2020 and shall vest through March 8, 2023, and 2,498 of which were granted on March 8, 2019 and shall vest through March 8, 2022.

SEC source: 0001093557-21-000212 · edgardoc.xml · nonDerivative · entry 1

Abbey Donald · CIK 0001534342 · EVP Quality and Regulatory Aff

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 48,689

F1 · shares: Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of RSUs. This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

F2 · balance_after: Included in this number are 13,673 restricted stock units, 5,301 of which were granted on March 8, 2021 and shall vest through March 8, 2024, 5,874 of which were granted on March 8, 2020 and shall vest through March 8, 2023, and 2,498 of which were granted on March 8, 2019 and shall vest through March 8, 2022.

SEC source: 0001093557-21-000202 · edgardoc.xml · nonDerivative · entry 2

Blackford Quentin S. · CIK 0001612451 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 30,261

F1 · shares: Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of RSUs. This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

F2 · balance_after: Included in this number are 19,047 unvested restricted stock units, 7,491 of which were granted on March 8, 2021 and shall vest through March 8, 2024, 8,484 of which were granted on March 8, 2020 and shall vest through March 8, 2023, and 3,072 of which were granted on March 8, 2019 and shall vest through March 8, 2022.

SEC source: 0001093557-21-000202 · edgardoc.xml · nonDerivative · entry 1

Blackford Quentin S. · CIK 0001612451 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 30,303

F1 · shares: Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of RSUs. This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

F2 · balance_after: Included in this number are 19,047 unvested restricted stock units, 7,491 of which were granted on March 8, 2021 and shall vest through March 8, 2024, 8,484 of which were granted on March 8, 2020 and shall vest through March 8, 2023, and 3,072 of which were granted on March 8, 2019 and shall vest through March 8, 2022.

SEC source: 0001093557-21-000200 · edgardoc.xml · nonDerivative · entry 1

Sylvain Jereme M · CIK 0001681267 · EVP, Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,933

F1 · shares: On June 4, 2021, Mr. Sylvain adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Sylvain. The shares set forth above were sold pursuant to the 10b5-1 Plan.

F2 · balance_after: Included in this number are 11,837 unvested restricted stock units, 5,301 of which were granted on March 8, 2021 and shall vest through March 8, 2024, 3,654 of which were granted on March 8, 2020 and shall vest through March 8, 2023, 1,608 of which were granted on March 8, 2019 and shall vest through March 8, 2022, and 1,274 of which were granted on November 8, 2018 and shall vest through November 8, 2021.

SEC source: 0001093557-21-000199 · edgardoc.xml · nonDerivative · entry 1

Murphy Patrick Michael · CIK 0001692785 · EVP, Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,241

F1 · shares: On August 28, 2020, Mr. Murphy adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Murphy. The shares set forth above were sold pursuant to the 10b5-1 Plan.

F2 · balance_after: Included in this number are 15,413 unvested restricted stock units, 5,634 of which were granted on March 8, 2021 and shall vest through March 8, 2024, 5,874 of which were granted on March 8, 2020 and shall vest through March 8, 2023, and 3,905 of which were granted on March 8, 2019 and shall vest through March 8, 2022.

SEC source: 0001093557-21-000197 · edgardoc.xml · nonDerivative · entry 4

Pacelli Steven Robert · CIK 0001359098 · Managing Dir., Dexcom Ventures

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 49,085

F1 · shares: On June 15, 2020, Mr. Pacelli adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Pacelli. The shares set forth above were sold pursuant to the 10b5-1 Plan.

F5 · price: This transaction was executed in multiple trades at prices ranging from $517.54 to $517.96. The price above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.

F3 · balance_after: Included in this number are 16,171 unvested restricted stock units, 5,301 of which were granted on March 8, 2021 and shall vest through March 8, 2024, 5,874 of which were granted on March 8, 2020 and shall vest through March 8, 2023, and 4,996 of which were granted on March 8, 2019 and shall vest through March 8, 2022.

SEC source: 0001093557-21-000197 · edgardoc.xml · nonDerivative · entry 3

Pacelli Steven Robert · CIK 0001359098 · Managing Dir., Dexcom Ventures

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 49,689

F1 · shares: On June 15, 2020, Mr. Pacelli adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Pacelli. The shares set forth above were sold pursuant to the 10b5-1 Plan.

F3 · balance_after: Included in this number are 16,171 unvested restricted stock units, 5,301 of which were granted on March 8, 2021 and shall vest through March 8, 2024, 5,874 of which were granted on March 8, 2020 and shall vest through March 8, 2023, and 4,996 of which were granted on March 8, 2019 and shall vest through March 8, 2022.

SEC source: 0001093557-21-000197 · edgardoc.xml · nonDerivative · entry 2

Pacelli Steven Robert · CIK 0001359098 · Managing Dir., Dexcom Ventures

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 49,785

F1 · shares: On June 15, 2020, Mr. Pacelli adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Pacelli. The shares set forth above were sold pursuant to the 10b5-1 Plan.

F4 · price: This transaction was executed in multiple trades at prices ranging from $514.745 to $515.340. The price above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.

F3 · balance_after: Included in this number are 16,171 unvested restricted stock units, 5,301 of which were granted on March 8, 2021 and shall vest through March 8, 2024, 5,874 of which were granted on March 8, 2020 and shall vest through March 8, 2023, and 4,996 of which were granted on March 8, 2019 and shall vest through March 8, 2022.

SEC source: 0001093557-21-000197 · edgardoc.xml · nonDerivative · entry 1

Pacelli Steven Robert · CIK 0001359098 · Managing Dir., Dexcom Ventures

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 49,907

F1 · shares: On June 15, 2020, Mr. Pacelli adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Pacelli. The shares set forth above were sold pursuant to the 10b5-1 Plan.

F2 · price: This transaction was executed in multiple trades at prices ranging from $513.18 to $513.51. The price above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.

F3 · balance_after: Included in this number are 16,171 unvested restricted stock units, 5,301 of which were granted on March 8, 2021 and shall vest through March 8, 2024, 5,874 of which were granted on March 8, 2020 and shall vest through March 8, 2023, and 4,996 of which were granted on March 8, 2019 and shall vest through March 8, 2022.

SEC source: 0001093557-22-000116 · edgardoc.xml · nonDerivative · entry 4

Dahut Karen M · CIK 0001533450 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 387

F1 · shares: Shares were transferred from direct ownership to ownership under the WILLIAM L DAHUT, JR TRUST & KAREN M DAHUT TRUST Dated 6/14/2005, upon vesting of previously awarded restricted stock units.

F4 · balance_after: Shares are held by the WILLIAM L DAHUT, JR TRUST & KAREN M DAHUT TRUST Dated 6/14/2005, with respect to which the reporting person is a trustee.

SEC source: 0001093557-22-000116 · edgardoc.xml · nonDerivative · entry 1

Dahut Karen M · CIK 0001533450 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,691

F1 · shares: Shares were transferred from direct ownership to ownership under the WILLIAM L DAHUT, JR TRUST & KAREN M DAHUT TRUST Dated 6/14/2005, upon vesting of previously awarded restricted stock units.

SEC source: 0001093557-21-000224 · edgardoc.xml · nonDerivative · entry 1

Selvaraj Shelly Ramasamy · CIK 0001805707 · SVP Information Technology

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,886

F1 · shares: This transaction represents a gift of securities made by the reporting person. This is not a market transaction, thus no price has been reported. Transferor retains no beneficial or voting interest in the transferred shares.

SEC source: 0001093557-21-000195 · edgardoc.xml · nonDerivative · entry 8

Balo Andrew K · CIK 0001323190 · *

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 10,652

F1 · shares: On March 5, 2021, Mr. Balo adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Balo. The shares set forth above were sold pursuant to the 10b5-1 Plan.

F10 · price: This transaction was executed in multiple trades at prices ranging from $519.64 to $520.63. The price above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issurer full information regarding the number of shares and prices at which the transactions were effected.

F3 · ownership.nature: Shares are held by the Balo Family Trust U/A/D 4/6/2006, with respect to which the reporting person is a trustee.

SEC source: 0001093557-21-000195 · edgardoc.xml · nonDerivative · entry 7

Balo Andrew K · CIK 0001323190 · *

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 11,001

F1 · shares: On March 5, 2021, Mr. Balo adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Balo. The shares set forth above were sold pursuant to the 10b5-1 Plan.

F9 · price: This transaction was executed in multiple trades at prices ranging from $518.60 to $519.50. The price above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issurer full information regarding the number of shares and prices at which the transactions were effected.

F3 · ownership.nature: Shares are held by the Balo Family Trust U/A/D 4/6/2006, with respect to which the reporting person is a trustee.

SEC source: 0001093557-21-000195 · edgardoc.xml · nonDerivative · entry 6

Balo Andrew K · CIK 0001323190 · *

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 11,526

F1 · shares: On March 5, 2021, Mr. Balo adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Balo. The shares set forth above were sold pursuant to the 10b5-1 Plan.

F8 · price: This transaction was executed in multiple trades at prices ranging from $517.600 to $518.515. The price above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issurer full information regarding the number of shares and prices at which the transactions were effected.

F3 · ownership.nature: Shares are held by the Balo Family Trust U/A/D 4/6/2006, with respect to which the reporting person is a trustee.

SEC source: 0001093557-21-000195 · edgardoc.xml · nonDerivative · entry 5

Balo Andrew K · CIK 0001323190 · *

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 11,726

F1 · shares: On March 5, 2021, Mr. Balo adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Balo. The shares set forth above were sold pursuant to the 10b5-1 Plan.

F7 · price: This transaction was executed in multiple trades at prices ranging from $516.425 to $517.020. The price above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issurer full information regarding the number of shares and prices at which the transactions were effected.

F3 · ownership.nature: Shares are held by the Balo Family Trust U/A/D 4/6/2006, with respect to which the reporting person is a trustee.

SEC source: 0001093557-21-000195 · edgardoc.xml · nonDerivative · entry 4

Balo Andrew K · CIK 0001323190 · *

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 11,926

F1 · shares: On March 5, 2021, Mr. Balo adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Balo. The shares set forth above were sold pursuant to the 10b5-1 Plan.

F6 · price: This transaction was executed in multiple trades at prices ranging from $515.00 to $515.92. The price above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issurer full information regarding the number of shares and prices at which the transactions were effected.

F3 · ownership.nature: Shares are held by the Balo Family Trust U/A/D 4/6/2006, with respect to which the reporting person is a trustee.

SEC source: 0001093557-21-000195 · edgardoc.xml · nonDerivative · entry 3

Balo Andrew K · CIK 0001323190 · *

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 12,226

F1 · shares: On March 5, 2021, Mr. Balo adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Balo. The shares set forth above were sold pursuant to the 10b5-1 Plan.

F5 · price: This transaction was executed in multiple trades at prices ranging from $513.59 to $514.43. The price above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issurer full information regarding the number of shares and prices at which the transactions were effected.

F3 · ownership.nature: Shares are held by the Balo Family Trust U/A/D 4/6/2006, with respect to which the reporting person is a trustee.

SEC source: 0001093557-21-000195 · edgardoc.xml · nonDerivative · entry 2

Balo Andrew K · CIK 0001323190 · *

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 12,526

F1 · shares: On March 5, 2021, Mr. Balo adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Balo. The shares set forth above were sold pursuant to the 10b5-1 Plan.

F4 · price: This transaction was executed in multiple trades at prices ranging from $512.46 to $513.39. The price above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issurer full information regarding the number of shares and prices at which the transactions were effected.

F3 · ownership.nature: Shares are held by the Balo Family Trust U/A/D 4/6/2006, with respect to which the reporting person is a trustee.

SEC source: 0001093557-21-000195 · edgardoc.xml · nonDerivative · entry 1

Balo Andrew K · CIK 0001323190 · *

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 12,726

F1 · shares: On March 5, 2021, Mr. Balo adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Balo. The shares set forth above were sold pursuant to the 10b5-1 Plan.

F2 · price: This transaction was executed in multiple trades at prices ranging from $511.45 to $512.36. The price above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.

F3 · ownership.nature: Shares are held by the Balo Family Trust U/A/D 4/6/2006, with respect to which the reporting person is a trustee.

SEC source: 0001093557-21-000193 · edgardoc.xml · nonDerivative · entry 1

Leach Jacob Steven · CIK 0001700255 · EVP Chief Technology Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 70,554

F1 · shares: On March 5, 2021, the reporting person adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Leach. The sale of shares set forth above were pursuant to the 10b5-1 Plan.

F2 · balance_after: Included in this number are 19,999 unvested restricted stock units, 7,171 of which were granted on March 8, 2021 and shall vest through March 8, 2024, 7,832 of which were granted on March 8, 2020 and shall vest through March 8, 2023, and 4,996 of which were granted on March 8, 2019 and shall vest through March 8, 2022.

SEC source: 0001093557-21-000183 · edgardoc.xml · nonDerivative · entry 1

Murphy Patrick Michael · CIK 0001692785 · EVP, Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,741

F1 · shares: On August 28, 2020, Mr. Murphy adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Murphy. The shares set forth above were sold pursuant to the 10b5-1 Plan.

F2 · balance_after: Included in this number are 15,413 unvested restricted stock units, 5,634 of which were granted on March 8, 2021 and shall vest through March 8, 2024, 5,874 of which were granted on March 8, 2020 and shall vest through March 8, 2023, and 3,905 of which were granted on March 8, 2019 and shall vest through March 8, 2022.

SEC source: 0001093557-21-000182 · edgardoc.xml · nonDerivative · entry 2

Pacelli Steven Robert · CIK 0001359098 · Managing Dir., Dexcom Ventures

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 50,163

F1 · shares: On June 15, 2020, Mr. Pacelli adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Pacelli. The shares set forth above were sold pursuant to the 10b5-1 Plan.

F3 · balance_after: Included in this number are 16,171 unvested restricted stock units, 5,301 of which were granted on March 8, 2021 and shall vest through March 8, 2024, 5,874 of which were granted on March 8, 2020 and shall vest through March 8, 2023, and 4,996 of which were granted on March 8, 2019 and shall vest through March 8, 2022.

SEC source: 0001093557-21-000182 · edgardoc.xml · nonDerivative · entry 1

Pacelli Steven Robert · CIK 0001359098 · Managing Dir., Dexcom Ventures

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 50,963

F1 · shares: On June 15, 2020, Mr. Pacelli adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Pacelli. The shares set forth above were sold pursuant to the 10b5-1 Plan.

F2 · price: This transaction was executed in multiple trades at prices ranging from $450.70 to $450.96. The price above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.

F3 · balance_after: Included in this number are 16,171 unvested restricted stock units, 5,301 of which were granted on March 8, 2021 and shall vest through March 8, 2024, 5,874 of which were granted on March 8, 2020 and shall vest through March 8, 2023, and 4,996 of which were granted on March 8, 2019 and shall vest through March 8, 2022.

SEC source: 0001093557-21-000179 · edgardoc.xml · nonDerivative · entry 1

Shrishrimal Sumi · CIK 0001850687 · SVP Chief Risk Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,586

F1 · shares: On November 25, 2020, Ms. Shrishrimal adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Shrishrimal. The shares set forth above were sold pursuant to the 10b5-1 Plan.

F2 · balance_after: Included in this number are 7,553 unvested restricted stock units, 3,073 of which were granted on March 8, 2021 and shall vest through March 8, 2024, 2,872 of which were granted on March 8, 2020 and shall vest through March 8, 2023 and 1,608 of which were granted on March 8, 2019 and shall vest through March 8, 2022.

SEC source: 0001093557-21-000177 · edgardoc.xml · nonDerivative · entry 4

Balo Andrew K · CIK 0001323190 · *

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 13,409

F1 · shares: On March 5, 2021, Mr. Balo adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Balo. The shares set forth above were sold pursuant to the 10b5-1 Plan.

F6 · price: This transaction was executed in multiple trades at prices ranging from $431.455 to $432.050. The price above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issurer full information regarding the number of shares and prices at which the transactions were effected.

F3 · ownership.nature: Shares are held by the Balo Family Trust U/A/D 4/6/2006, with respect to which the reporting person is a trustee.