Form4insider filings, from the source

Company · CIK 0001093557 · SIC 3841 — Surgical & Medical Instruments & Apparatus · Nasdaq

DEXCOM INC · DXCM

Insider activity reported against this company. All insider holders · On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $0 · 0sales $9.6M · 14net −$9.6M
$10k$10k$100k$100k$1M$1M$10M$10MbuyssalesMar 27Apr 26May 27Jun 27Jul 28Aug 28Sep 27

Reported at this company — common stock

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Sep 15, 2026 SForm 4 →Sep 16, 4:25 pm EDTMichael Jon BrownEVP Chief Legal Compliance Off1,700$84.04$142,86899,885−1.67%10b5-1
Sep 14, 2026 SForm 4 →Sep 16, 4:26 pm EDTNicholas AugustinosDirector8,089$84.04$679,76929,293−21.6%10b5-1
Sep 10, 2026 SForm 4 →Sep 14, 4:02 pm EDTJereme M SylvainEVP, Chief Financal Officer3,638$83.27$302,936146,828−2.42%10b5-1
Sep 10, 2026 AForm 4 →Sep 10, 4:40 pm EDTGlenn S BoehnleinDirector5,841——5,841—
Aug 27, 2026 SForm 4 →Aug 28, 4:57 pm EDTSadie SternEVP Chief People & Culture Off2,565$88.37$226,669126,043−1.99%10b5-1
Aug 22, 2026 FForm 4 →Aug 25, 4:14 pm EDTJacob Steven LeachPresident, CEO, and Director, Director1,451$92.34$133,985418,908—
Aug 22, 2026 FForm 4 →Aug 25, 4:14 pm EDTJereme M SylvainEVP, Chief Financal Officer1,451$92.34$133,985150,390—
Aug 22, 2026 FForm 4 →Aug 25, 4:14 pm EDTMichael Jon BrownEVP Chief Legal Compliance Off1,451$92.34$133,985101,502—
Aug 22, 2026 FForm 4 →Aug 25, 4:14 pm EDTSadie SternEVP Chief People & Culture Off1,451$92.34$133,985128,608—
Aug 20, 2026 SForm 4 →Aug 24, 4:01 pm EDTKevin R SayerExecutive Chair, Director26,756$90.01$2,408,242302,214−8.13%10b5-1
Aug 14, 2026 SForm 4 →Aug 17, 4:08 pm EDTMichael Jon BrownEVP Chief Legal Compliance Off1,700$91.93$156,281102,953−1.62%10b5-1
Aug 12, 2026 GForm 4 →Aug 13, 6:38 pm EDTNicholas AugustinosDirector1,075——37,382—
Aug 12, 2026 SForm 4 →Aug 13, 4:04 pm EDTBridgette P HellerDirector1,012$88.29$89,34929,570−3.31%10b5-1
Jul 31, 2026 SForm 4 →Aug 4, 4:38 pm EDTMark G FolettaDirector4,000$82.66$330,64048,852−7.57%10b5-1
Jul 20, 2026 SForm 4 →Jul 21, 4:58 pm EDTKevin R SayerExecutive Chair, Director26,756$76.32$2,041,999328,970−7.52%10b5-1
Jul 15, 2026 SForm 4 →Jul 16, 5:06 pm EDTMichael Jon BrownEVP Chief Legal Compliance Off1,700$74.42$126,514104,653−1.60%10b5-1
Jul 6, 2026 SForm 4 →Jul 7, 4:09 pm EDTKevin R SayerExecutive Chair, Director26,756$72.00$1,926,432355,726−7.00%10b5-1
Jun 15, 2026 SForm 4 →Jun 17, 4:32 pm EDTMichael Jon BrownEVP Chief Legal Compliance Off1,700$75.55$128,435106,353−1.57%10b5-1
Jun 15, 2026 SForm 4 →Jun 17, 4:32 pm EDTMark G FolettaDirector4,000$74.13$296,54052,852−7.04%10b5-1
Jun 3, 2026 SForm 4 →Jun 5, 4:17 pm EDTJon ColemanEVP, Chief Commercial Officer9,823$73.56$722,62895,450−9.33%10b5-1

Reported at this company — derivatives (options, RSUs, warrants)

No reported derivative activity in this period.