SEC INSIDER TRANSACTIONS

DEXCOM INC (DXCM) Insider Transactions

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DXCM · DEXCOM INC

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Roles: director,officer,ten_percent_owner,otherOwner nameOfficer titleOwnership: D, I, unknownoriginal or amendedTransaction fromTransaction throughFiled fromFiled throughMinimum quantityMaximum quantityMinimum priceMaximum priceMinimum calculated valueMaximum calculated valueResults per page (1–100)

OR within codes/roles; AND between categories. Roles apply to buyers and sellers. Owner predicates match the same owner. Missing values fail numeric/date filters. Value is quantity × reported price for non-derivative rows only; derivative values are unknown. Amendments stay separate; joint owners do not duplicate rows.

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Stale snapshot · Covered: filings 2026-10-15 to 2026-11-13 · 7 filings · fetched 2026-11-13T17:38:16Z

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Recent reported activity

0purchase rows on this page

2sale rows on this page

7matching filing rows

Purchases and sales count original non-derivative P and S rows. Awards, gifts, exercises, derivatives and amendments are shown separately and are not described as market purchases.

Transaction / filed	Reporting owner(s)	Code / security	Quantity	Price as filed	Ownership	Source
2026-11-08Filed 2026-11-10	Sylvain Jereme MOfficer · EVP, COO & CFO Filing context Reported filing row; may be amended. Do not sum filings blindly. F1 Represents the number of shares required to be withheld by the Issuer to cover tax withholding and remittance obligations in connection with the net settlement of restricted stock units and does not represent a sale by the Reporting Person. F2 Included in this number are 84,244 unvested restricted stock units, 48,774 of which were granted on March 8, 2026 and shall vest through March 8, 2029, 23,937 of which were granted on March 8, 2025 and shall vest through March 8, 2028, 2,849 of which were granted on March 8, 2025 and shall vest through March 8, 2027, and 8,684 of which were granted on March 8, 2024 and shall vest through March 8, 2027. References: F1, F2	F WithholdingCommon Stock · Non-derivative	1,451D	79.41	Direct	Form 4 ↗0001093557-26-000203
2026-11-08Filed 2026-11-10	Stern SadieOfficer · EVP Chief People & Culture Off Filing context Reported filing row; may be amended. Do not sum filings blindly. F1 Represents the number of shares required to be withheld by the Issuer to cover tax withholding and remittance obligations in connection with the net settlement of restricted stock units and does not represent a sale by the Reporting Person. F2 Included in this number are 69,053 unvested restricted stock units, 39,019 of which were granted on March 8, 2026 and shall vest through March 8, 2029, 19,948 of which were granted on March 8, 2025 and shall vest through March 8, 2028, 2,849 of which were granted on March 8, 2025 and shall vest through March 8, 2027, and 7,237 of which were granted on March 8, 2024 and shall vest through March 8, 2027. References: F1, F2	F WithholdingCommon Stock · Non-derivative	1,451D	79.41	Direct	Form 4 ↗0001093557-26-000204
2026-11-08Filed 2026-11-10	Leach Jacob StevenDirector · Officer · President, CEO, and Director Filing context Reported filing row; may be amended. Do not sum filings blindly. F1 Represents the number of shares required to be withheld by the Issuer to cover tax withholding and remittance obligations in connection with the net settlement of restricted stock units and does not represent a sale by the Reporting Person. F2 Included in this number are 139,986 unvested restricted stock units, 104,516 of which were granted on March 8, 2026 and shall vest through March 8, 2029, 23,937 of which were granted on March 8, 2025 and shall vest through March 8, 2028, 2,849 of which were granted on March 8, 2025 and shall vest through March 8, 2027, and 8,684 of which were granted on March 8, 2024 and shall vest through March 8, 2027. F3 Shares are held by the Gregg Family Grandchildren's Trust UAD 12/30/2010, with respect to which the Reporting Person's spouse is a trustee. References: F1, F2	F WithholdingCommon Stock · Non-derivative	1,451D	79.41	Direct	Form 4 ↗0001093557-26-000205
2026-11-08Filed 2026-11-10	Brown Michael JonOfficer · EVP Chief Legal Compliance Off Filing context Reported filing row; may be amended. Do not sum filings blindly. F1 Represents the number of shares required to be withheld by the Issuer to cover tax withholding and remittance obligations in connection with the net settlement of restricted stock units and does not represent a sale by the Reporting Person. F2 Included in this number are 69,053 unvested restricted stock units, 39,019 of which were granted on March 8, 2026 and shall vest through March 8, 2029, 19,948 of which were granted on March 8, 2025 and shall vest through March 8, 2028, 2,849 of which were granted on March 8, 2025 and shall vest through March 8, 2027, and 7,237 of which were granted on March 8, 2024 and shall vest through March 8, 2027. References: F1, F2	F WithholdingCommon Stock · Non-derivative	1,451D	79.41	Direct	Form 4 ↗0001093557-26-000206
2026-10-30Filed 2026-11-03	Ashley Euan A.Director Filing context Reported filing row; may be amended. Do not sum filings blindly. F1 Represents unvested restricted stock units, 5,565 of which were granted on May 28, 2026 and will vest on the earlier of the one year anniversary of the grant date or the date of DexCom, Inc.'s 2027 Annual Meeting of Stockholders, and 4,777 of which were granted on October 24, 2025 and shall vest through October 24, 2028. F2 On October 30, 2026, the Reporting Person transferred 2,389 shares of the Issuer's common stock to the Ashley Family Revocable Living Trust for no consideration. F3 Shares are held by the Ashley Family Revocable Living Trust, with respect to which the Reporting Person and the Reporting Person's spouse are co-trustees. References: F1, F2	G GiftCommon Stock · Non-derivative	2,389D	0	Direct	Form 4 ↗0001093557-26-000198
2026-10-27Filed 2026-10-28	Stern SadieOfficer · EVP Chief People & Culture Off Filing context Reported filing row; may be amended. Do not sum filings blindly. F1 On May 28, 2026, Ms. Stern adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Stern. The shares set forth above were sold pursuant to the 10b5-1 Plan. F2 Included in this number are 71,903 unvested restricted stock units, 39,019 of which were granted on March 8, 2026 and shall vest through March 8, 2029, 19,948 of which were granted on March 8, 2025 and shall vest through March 8, 2028, 5,699 of which were granted on March 8, 2025 and shall vest through March 8, 2027, and 7,237 of which were granted on March 8, 2024 and shall vest through March 8, 2027. References: F1, F2	S Sale (market/private)Common Stock · Non-derivative	2,565D	78.62	Direct	Form 4 ↗0001093557-26-000187
2026-10-15Filed 2026-10-19	Brown Michael JonOfficer · EVP Chief Legal Compliance Off Filing context Reported filing row; may be amended. Do not sum filings blindly. F1 On November 26, 2025, Mr. Brown adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Brown. The shares set forth above were sold pursuant to the 10b5- 1 Plan. F2 Included in this number are 71,903 unvested restricted stock units, 39,019 of which were granted on March 8, 2026 and shall vest through March 8, 2029, 19,948 of which were granted on March 8, 2025 and shall vest through March 8, 2028, 5,699 of which were granted on March 8, 2025 and shall vest through March 8, 2027, and 7,237 of which were granted on March 8, 2024 and shall vest through March 8, 2027. References: F1, F2	S Sale (market/private)Common Stock · Non-derivative	1,700D	85.48	Direct	Form 4 ↗0001093557-26-000183

Imported instruments only. Joint owners do not multiply transactions. Amendments are separate filing rows, not additional trades. No aggregate trade totals are implied.