18 insiders reported 128 Form 4 transactions for DEXCOM INC (DXCM) over the past 18 months (most recent 2026-08-17). Recent activity: Brown Michael Jon (EVP Chief Legal Compliance Off) Sell 1,700 shares, AUGUSTINOS NICHOLAS (Director) Sell 1,075 shares, Heller Bridgette P (Director) Sell 1,012 shares, FOLETTA MARK G (Director) Sell 2,000 shares, FOLETTA MARK G (Director) Sell 2,000 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-17 | Brown Michael Jon | EVP Chief Legal Compliance Off | Sell | 1,700 | $156,281 |
| 2026-08-13 | AUGUSTINOS NICHOLAS | Director | Sell | 1,075 | $0 |
| 2026-08-13 | Heller Bridgette P | Director | Sell | 1,012 | $89,349 |
| 2026-08-04 | FOLETTA MARK G | Director | Sell | 2,000 | $160,000 |
| 2026-08-04 | FOLETTA MARK G | Director | Sell | 2,000 | $170,640 |
| 2026-07-21 | SAYER KEVIN R | Executive Chair | Sell | 26,756 | $2.0M |
| 2026-07-16 | Brown Michael Jon | EVP Chief Legal Compliance Off | Sell | 1,700 | $126,514 |
| 2026-07-07 | SAYER KEVIN R | Executive Chair | Sell | 26,756 | $1.9M |
| 2026-06-17 | FOLETTA MARK G | Director | Sell | 3,801 | $281,651 |
| 2026-06-17 | Brown Michael Jon | EVP Chief Legal Compliance Off | Sell | 1,700 | $128,435 |
| 2026-06-17 | FOLETTA MARK G | Director | Sell | 199 | $14,889 |
| 2026-06-05 | Coleman Jon | EVP, Chief Commercial Officer | Sell | 4,911 | $364,052 |
| 2026-06-05 | Coleman Jon | EVP, Chief Commercial Officer | Sell | 4,912 | $358,576 |
| 2026-06-01 | ALTMAN STEVEN R | Director | Buy | 5,565 | $0 |
| 2026-06-01 | FOLETTA MARK G | Director | Buy | 6,331 | $0 |
| 2026-06-01 | AUGUSTINOS NICHOLAS | Director | Buy | 5,575 | $0 |
| 2026-06-01 | Heller Bridgette P | Director | Buy | 5,575 | $0 |
| 2026-06-01 | GALA RENEE D | Director | Buy | 5,605 | $0 |
| 2026-06-01 | Collins Richard Alexander | Director | Buy | 5,605 | $0 |
| 2026-06-01 | Malady Kyle | Director | Buy | 5,575 | $0 |
| 2026-06-01 | Driscoll Rimma | Director | Buy | 5,605 | $0 |
| 2026-06-01 | Ashley Euan A. | Director | Buy | 5,565 | $0 |
| 2026-06-01 | Osterloh Albert Frederick IV | Director | Buy | 1,630 | $0 |
| 2026-05-27 | Coleman Jon | EVP, Chief Commercial Officer | Sell | 7,362 | $529,328 |
| 2026-05-27 | Sylvain Jereme M | EVP, Chief Financal Officer | Sell | 1,451 | $104,327 |
Source: SEC Form 4 filings · as of 2026-08-17