KAHN BARBARA

SEC source: 0001093557-24-000096 · edgardoc.xml · nonDerivative · entry 2

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · by Trust

Disclosed balance after: 22,575

F1 · shares: Shares were transferred from direct ownership to ownership under the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, upon vesting of previously awarded restricted stock units.

F2 · balance_after: Shares are held by the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, with respect to which the reporting person is a trustee.

SEC source: 0001093557-24-000096 · edgardoc.xml · nonDerivative · entry 1

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

F1 · shares: Shares were transferred from direct ownership to ownership under the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, upon vesting of previously awarded restricted stock units.

SEC source: 0001093557-23-000137 · edgardoc.xml · nonDerivative · entry 3

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · by Trust

Disclosed balance after: 19,648

F2 · shares: Shares were transferred from direct ownership to ownership under the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, upon vesting of previously awarded restricted stock units.

F3 · balance_after: Shares are held by the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, with respect to which the reporting person is a trustee.

SEC source: 0001093557-23-000137 · edgardoc.xml · nonDerivative · entry 2

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,927

F2 · shares: Shares were transferred from direct ownership to ownership under the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, upon vesting of previously awarded restricted stock units.

SEC source: 0001093557-23-000137 · edgardoc.xml · nonDerivative · entry 1

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,903

F1 · shares: The RSU Award was granted on May 18, 2023 and 100% of the RSU will vest on the earlier of the one year anniversary of the grant date or the date of DexCom Inc's 2024 Annual Meeting. Each share is represented by a restricted stock unit (RSU) that represents a contingent right to receive one share of DexCom, Inc. Common Stock upon settlement.

SEC source: 0001093557-22-000119 · edgardoc.xml · nonDerivative · entry 2

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 994

F2 · shares: The RSU Award was granted on May 20, 2022 and 100% of the RSU will vest on the earlier of the one year anniversary of the grant date or the date of DexCom Inc's 2023 Annual Meeting. Each share is represented by a restricted stock unit (RSU) that represents a contingent right to receive one share of DexCom, Inc. Common Stock upon settlement.

F3 · balance_after: Represents 994 restricted stock units which were granted on May 20, 2022 and will vest on the earlier of the one year anniversary of the grant date or the date of DexCom Inc's 2023 Annual Meeting.

SEC source: 0001093557-22-000119 · edgardoc.xml · nonDerivative · entry 3

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 3,918

F1 · shares: Shares were transferred from direct ownership to ownership under the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, upon vesting of previously awarded restricted stock units.

F4 · balance_after: Shares are held by the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, with respect to which the reporting person is a trustee.

SEC source: 0001093557-22-000119 · edgardoc.xml · nonDerivative · entry 1

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F1 · shares: Shares were transferred from direct ownership to ownership under the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, upon vesting of previously awarded restricted stock units.

SEC source: 0001093557-22-000016 · edgardoc.xml · nonDerivative · entry 15

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 3,000

F1 · shares: On November 12, 2021, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F13 · price: This transaction was executed in multiple trades at prices ranging from $451.96 to $452.94. 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.

F2 · balance_after: Represents 918 restricted stock units which were granted on May 21, 2021 and will vest on the earlier of the one year anniversary of the grant date or the date of DexCom Inc's 2022 Annual Meeting.

SEC source: 0001093557-22-000016 · edgardoc.xml · nonDerivative · entry 14

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 3,400

F1 · shares: On November 12, 2021, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F12 · price: This transaction was executed in multiple trades at prices ranging from $450.96 to $451.61. 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.

F2 · balance_after: Represents 918 restricted stock units which were granted on May 21, 2021 and will vest on the earlier of the one year anniversary of the grant date or the date of DexCom Inc's 2022 Annual Meeting.

SEC source: 0001093557-22-000016 · edgardoc.xml · nonDerivative · entry 13

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 3,600

F1 · shares: On November 12, 2021, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F11 · price: This transaction was executed in multiple trades at prices ranging from $449.61 to $450.52. 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.

F2 · balance_after: Represents 918 restricted stock units which were granted on May 21, 2021 and will vest on the earlier of the one year anniversary of the grant date or the date of DexCom Inc's 2022 Annual Meeting.

SEC source: 0001093557-22-000016 · edgardoc.xml · nonDerivative · entry 12

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 3,800

F1 · shares: On November 12, 2021, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F10 · price: This transaction was executed in multiple trades at prices ranging from $448.53 to $449.47. 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.

F2 · balance_after: Represents 918 restricted stock units which were granted on May 21, 2021 and will vest on the earlier of the one year anniversary of the grant date or the date of DexCom Inc's 2022 Annual Meeting.

SEC source: 0001093557-22-000016 · edgardoc.xml · nonDerivative · entry 11

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 4,200

F1 · shares: On November 12, 2021, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F9 · price: This transaction was executed in multiple trades at prices ranging from $447.06 to $447.64. 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.

F2 · balance_after: Represents 918 restricted stock units which were granted on May 21, 2021 and will vest on the earlier of the one year anniversary of the grant date or the date of DexCom Inc's 2022 Annual Meeting.

SEC source: 0001093557-22-000016 · edgardoc.xml · nonDerivative · entry 10

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 4,400

F1 · shares: On November 12, 2021, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F8 · price: his transaction was executed in multiple trades at prices ranging from $445.54 to $446.15. 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.

F2 · balance_after: Represents 918 restricted stock units which were granted on May 21, 2021 and will vest on the earlier of the one year anniversary of the grant date or the date of DexCom Inc's 2022 Annual Meeting.

SEC source: 0001093557-22-000016 · edgardoc.xml · nonDerivative · entry 9

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 4,600

F1 · shares: On November 12, 2021, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F7 · price: This transaction was executed in multiple trades at prices ranging from $444.35 to $445.05. 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.

F2 · balance_after: Represents 918 restricted stock units which were granted on May 21, 2021 and will vest on the earlier of the one year anniversary of the grant date or the date of DexCom Inc's 2022 Annual Meeting.

SEC source: 0001093557-22-000016 · edgardoc.xml · nonDerivative · entry 8

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 5,000

F1 · shares: On November 12, 2021, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F6 · price: This transaction was executed in multiple trades at prices ranging from $442.93 to $443.89. 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.

F2 · balance_after: Represents 918 restricted stock units which were granted on May 21, 2021 and will vest on the earlier of the one year anniversary of the grant date or the date of DexCom Inc's 2022 Annual Meeting.

SEC source: 0001093557-22-000016 · edgardoc.xml · nonDerivative · entry 7

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 5,443

F1 · shares: On November 12, 2021, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F5 · price: This transaction was executed in multiple trades at prices ranging from $434.28 to $434.84. 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.

F2 · balance_after: Represents 918 restricted stock units which were granted on May 21, 2021 and will vest on the earlier of the one year anniversary of the grant date or the date of DexCom Inc's 2022 Annual Meeting.

SEC source: 0001093557-22-000016 · edgardoc.xml · nonDerivative · entry 6

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 6,590

F1 · shares: On November 12, 2021, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F4 · price: his transaction was executed in multiple trades at prices ranging from $441.69 to $442.66. 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.

F2 · balance_after: Represents 918 restricted stock units which were granted on May 21, 2021 and will vest on the earlier of the one year anniversary of the grant date or the date of DexCom Inc's 2022 Annual Meeting.

SEC source: 0001093557-22-000016 · edgardoc.xml · nonDerivative · entry 5

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 7,066

F1 · shares: On November 12, 2021, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F3 · price: This transaction was executed in multiple trades at prices ranging from $440.65 to $441.04. 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.

F2 · balance_after: Represents 918 restricted stock units which were granted on May 21, 2021 and will vest on the earlier of the one year anniversary of the grant date or the date of DexCom Inc's 2022 Annual Meeting.

SEC source: 0001093557-22-000016 · edgardoc.xml · nonDerivative · entry 4

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 7,266

F1 · shares: On November 12, 2021, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F2 · balance_after: Represents 918 restricted stock units which were granted on May 21, 2021 and will vest on the earlier of the one year anniversary of the grant date or the date of DexCom Inc's 2022 Annual Meeting.

SEC source: 0001093557-22-000016 · edgardoc.xml · nonDerivative · entry 3

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 7,366

F1 · shares: On November 12, 2021, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F2 · balance_after: Represents 918 restricted stock units which were granted on May 21, 2021 and will vest on the earlier of the one year anniversary of the grant date or the date of DexCom Inc's 2022 Annual Meeting.

SEC source: 0001093557-22-000016 · edgardoc.xml · nonDerivative · entry 2

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 7,466

F1 · shares: On November 12, 2021, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F2 · balance_after: Represents 918 restricted stock units which were granted on May 21, 2021 and will vest on the earlier of the one year anniversary of the grant date or the date of DexCom Inc's 2022 Annual Meeting.

SEC source: 0001093557-22-000016 · edgardoc.xml · nonDerivative · entry 1

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 7,566

F1 · shares: On November 12, 2021, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F2 · balance_after: Represents 918 restricted stock units which were granted on May 21, 2021 and will vest on the earlier of the one year anniversary of the grant date or the date of DexCom Inc's 2022 Annual Meeting.

SEC source: 0001093557-21-000145 · edgardoc.xml · nonDerivative · entry 2

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 918

F2 · shares: The RSU Award was granted on May 21, 2021 and 100% of the RSU will vest on the earlier of the one year anniversary of the grant date or the date of DexCom Inc's 2022 Annual Meeting. Each share is represented by a restricted stock unit (RSU) that represents a contingent right to receive one share of DexCom, Inc. Common Stock upon settlement.

F3 · balance_after: Represents 918 restricted stock units which were granted on May 21, 2021 and will vest on the earlier of the one year anniversary of the grant date or the date of DexCom Inc's 2022 Annual Meeting.

SEC source: 0001093557-21-000145 · edgardoc.xml · nonDerivative · entry 3

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 7,666

F1 · shares: Shares were transferred from direct ownership to ownership under the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, upon vesting of previously awarded restricted stock units.

F4 · balance_after: Shares are held by the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, with respect to which the reporting person is a trustee.

F4 · ownership.nature: Shares are held by the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, with respect to which the reporting person is a trustee.

SEC source: 0001093557-21-000145 · edgardoc.xml · nonDerivative · entry 1

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F1 · shares: Shares were transferred from direct ownership to ownership under the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, upon vesting of previously awarded restricted stock units.

SEC source: 0001093557-20-000186 · edgardoc.xml · nonDerivative · entry 13

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 6,879

F1 · shares: On March 10, 2020, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F14 · price: This transaction was executed in multiple trades at prices ranging from $386.21 to $386.41. 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.

F2 · ownership.nature: Shares are held by the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, with respect to which the reporting person is a trustee.

SEC source: 0001093557-20-000186 · edgardoc.xml · nonDerivative · entry 12

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 7,079

F1 · shares: On March 10, 2020, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F13 · price: This transaction was executed in multiple trades at prices ranging from $385.13 to $385.89. 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.

F2 · ownership.nature: Shares are held by the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, with respect to which the reporting person is a trustee.

SEC source: 0001093557-20-000186 · edgardoc.xml · nonDerivative · entry 11

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 8,979

F1 · shares: On March 10, 2020, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F12 · price: This transaction was executed in multiple trades at prices ranging from $383.99 to $384.93. 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.

F2 · ownership.nature: Shares are held by the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, with respect to which the reporting person is a trustee.

SEC source: 0001093557-20-000186 · edgardoc.xml · nonDerivative · entry 10

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 9,479

F1 · shares: On March 10, 2020, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F11 · price: This transaction was executed in multiple trades at prices ranging from $382.96 to $383.69. 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.

F2 · ownership.nature: Shares are held by the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, with respect to which the reporting person is a trustee.

SEC source: 0001093557-20-000186 · edgardoc.xml · nonDerivative · entry 9

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 9,879

F1 · shares: On March 10, 2020, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F10 · price: This transaction was executed in multiple trades at prices ranging from $381.80 to $382.57. 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.

F2 · ownership.nature: Shares are held by the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, with respect to which the reporting person is a trustee.

SEC source: 0001093557-20-000186 · edgardoc.xml · nonDerivative · entry 8

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 10,179

F1 · shares: On March 10, 2020, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F9 · price: This transaction was executed in multiple trades at prices ranging from $380.77 to $381.50. 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 issuer full information regarding the number of shares and prices at which the transactions were effected.

F2 · ownership.nature: Shares are held by the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, with respect to which the reporting person is a trustee.

SEC source: 0001093557-20-000186 · edgardoc.xml · nonDerivative · entry 7

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 10,579

F1 · shares: On March 10, 2020, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F8 · price: This transaction was executed in multiple trades at prices ranging from $379.72 to $380.44. 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.

F2 · ownership.nature: Shares are held by the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, with respect to which the reporting person is a trustee.

SEC source: 0001093557-20-000186 · edgardoc.xml · nonDerivative · entry 6

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 11,079

F1 · shares: On March 10, 2020, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F7 · price: This transaction was executed in multiple trades at prices ranging from $378.61 to $379.21. 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.

F2 · ownership.nature: Shares are held by the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, with respect to which the reporting person is a trustee.

SEC source: 0001093557-20-000186 · edgardoc.xml · nonDerivative · entry 5

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 11,479

F1 · shares: On March 10, 2020, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F6 · price: This transaction was executed in multiple trades at prices ranging from $377.14 to $378.04. 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.

F2 · ownership.nature: Shares are held by the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, with respect to which the reporting person is a trustee.

SEC source: 0001093557-20-000186 · edgardoc.xml · nonDerivative · entry 4

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 12,079

F1 · shares: On March 10, 2020, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F5 · price: This transaction was executed in multiple trades at prices ranging from $375.86 to $376.73. 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.

F2 · ownership.nature: Shares are held by the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, with respect to which the reporting person is a trustee.

SEC source: 0001093557-20-000186 · edgardoc.xml · nonDerivative · entry 3

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 12,379

F1 · shares: On March 10, 2020, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F4 · price: This transaction was executed in multiple trades at prices ranging from $374.80 to $375.64. 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.

F2 · ownership.nature: Shares are held by the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, with respect to which the reporting person is a trustee.

SEC source: 0001093557-20-000186 · edgardoc.xml · nonDerivative · entry 2

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 13,279

F1 · shares: On March 10, 2020, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F3 · price: This transaction was executed in multiple trades at prices ranging from $373.70 to $374.55. 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.

F2 · ownership.nature: Shares are held by the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, with respect to which the reporting person is a trustee.

SEC source: 0001093557-20-000186 · edgardoc.xml · nonDerivative · entry 1

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 13,779

F1 · shares: On March 10, 2020, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F2 · ownership.nature: Shares are held by the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, with respect to which the reporting person is a trustee.

SEC source: 0001093557-20-000161 · edgardoc.xml · nonDerivative · entry 2

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 787

F2 · shares: The RSU Award was granted on May 22, 2020 and 100% of the RSU will vest on the earlier of the one year anniversary of the grant date or the date of DexCom Inc's 2021 Annual Meeting. Each share is represented by a restricted stock unit (RSU) that represents a contingent right to receive one share of DexCom, Inc. Common Stock upon settlement.

F3 · balance_after: Represents 787 restricted stock units which were granted on May 22, 2020 and will vest on the earlier of the one year anniversary of the grant date or the date of DexCom Inc's 2021 Annual Meeting.

SEC source: 0001093557-20-000161 · edgardoc.xml · nonDerivative · entry 3

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 13,879

F1 · shares: Shares were transferred from direct ownership to ownership under the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, upon vesting of previously awarded restricted stock units.

F4 · balance_after: Shares are held by the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, with respect to which the reporting person is a trustee.

F4 · ownership.nature: Shares are held by the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, with respect to which the reporting person is a trustee.

SEC source: 0001093557-20-000161 · edgardoc.xml · nonDerivative · entry 1

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F1 · shares: Shares were transferred from direct ownership to ownership under the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, upon vesting of previously awarded restricted stock units.

SEC source: 0001093557-19-000258 · edgardoc.xml · nonDerivative · entry 10

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 11,266

F1 · shares: On September 13, 2019, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F3 · balance_after: Shares are held by the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, with respect to which the reporting person is a trustee.

SEC source: 0001093557-19-000258 · edgardoc.xml · nonDerivative · entry 9

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 11,366

F1 · shares: On September 13, 2019, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F10 · price: This transaction was executed in multiple trades at prices ranging from $211.12 to $211.90. 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: Shares are held by the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, with respect to which the reporting person is a trustee.

SEC source: 0001093557-19-000258 · edgardoc.xml · nonDerivative · entry 8

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 11,866

F1 · shares: On September 13, 2019, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F9 · price: This transaction was executed in multiple trades at prices ranging from $209.83 to $210.81. 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: Shares are held by the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, with respect to which the reporting person is a trustee.

SEC source: 0001093557-19-000258 · edgardoc.xml · nonDerivative · entry 7

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 12,666

F1 · shares: On September 13, 2019, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F3 · balance_after: Shares are held by the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, with respect to which the reporting person is a trustee.

SEC source: 0001093557-19-000258 · edgardoc.xml · nonDerivative · entry 6

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 12,766

F1 · shares: On September 13, 2019, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F8 · price: This transaction was executed in multiple trades at prices ranging from $207.30 to $208.19. 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: Shares are held by the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, with respect to which the reporting person is a trustee.

SEC source: 0001093557-19-000258 · edgardoc.xml · nonDerivative · entry 5

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 13,366

F1 · shares: On September 13, 2019, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F7 · price: This transaction was executed in multiple trades at prices ranging from $206.14 to $207.12. 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: Shares are held by the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, with respect to which the reporting person is a trustee.

SEC source: 0001093557-19-000258 · edgardoc.xml · nonDerivative · entry 4

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 13,966

F1 · shares: On September 13, 2019, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F6 · price: This transaction was executed in multiple trades at prices ranging from $205.02 to $206.00. 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: Shares are held by the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, with respect to which the reporting person is a trustee.

SEC source: 0001093557-19-000258 · edgardoc.xml · nonDerivative · entry 3

KAHN BARBARA · CIK 0001520391 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 15,166

F1 · shares: On September 13, 2019, Ms. Kahn adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Kahn. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F5 · price: This transaction was executed in multiple trades at prices ranging from $203.87 to $204.81. 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: Shares are held by the Barbara Kahn TTEE Barbara Kahn Rev TRT DTD 6/26/96 & Robert Meyer TTEE Robert Meyer Rev Trst DTD 6/26/96, with respect to which the reporting person is a trustee.