DXCM · Insider Trading
DexCom, Inc.
Every open-market purchase and sale reported by DXCM officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-11-10 | Sadie Stern | EVP Chief People & Culture Off | F | −1,451 | −$115.22K |
| 2026-11-10 | Jereme M Sylvain | EVP, COO & CFO | F | −1,451 | −$115.22K |
| 2026-11-10 | Jacob Steven Leach | President, CEO, and Director | F | −1,451 | −$115.22K |
| 2026-11-10 | Michael Jon Brown | EVP Chief Legal Compliance Off | F | −1,451 | −$115.22K |
| 2026-11-03 | Euan A. Ashley | Director | G | −2,389 | — |
| 2026-10-28 | Sadie Stern | EVP Chief People & Culture Off | Sell | −2,565 | −$201.66K |
| 2026-10-19 | Michael Jon Brown | EVP Chief Legal Compliance Off | Sell | −1,700 | −$145.32K |
| 2026-09-30 | Sadie Stern | EVP Chief People & Culture Off | Sell | −2,565 | −$220.97K |
| 2026-09-16 | Michael Jon Brown | EVP Chief Legal Compliance Off | Sell | −1,700 | −$142.87K |
| 2026-09-16 | Nicholas Augustinos | Director | Sell | −8,089 | −$679.77K |
| 2026-09-14 | Jereme M Sylvain | EVP, Chief Financal Officer | Sell | −3,638 | −$302.94K |
| 2026-09-10 | Glenn S Boehnlein | Director | A | +5,841 | — |
| 2026-08-28 | Sadie Stern | EVP Chief People & Culture Off | Sell | −2,565 | −$226.67K |
| 2026-08-25 | Sadie Stern | EVP Chief People & Culture Off | F | −1,451 | −$133.99K |
| 2026-08-25 | Jereme M Sylvain | EVP, Chief Financal Officer | F | −1,451 | −$133.99K |
| 2026-08-25 | Jacob Steven Leach | President, CEO, and Director | F | −1,451 | −$133.99K |
| 2026-08-25 | Michael Jon Brown | EVP Chief Legal Compliance Off | F | −1,451 | −$133.99K |
| 2026-08-24 | Kevin R Sayer | Executive Chair | Sell | −26,756 | −$2.41M |
| 2026-08-17 | Michael Jon Brown | EVP Chief Legal Compliance Off | Sell | −1,700 | −$156.28K |
| 2026-08-13 | Nicholas Augustinos | Director | G | −1,075 | — |
| 2026-08-13 | Bridgette P Heller | Director | Sell | −1,012 | −$89.35K |
| 2026-08-04 | Mark G Foletta | Director | Sell | −4,000 | −$330.64K |
| 2026-07-21 | Kevin R Sayer | Executive Chair | Sell | −26,756 | −$2.04M |
| 2026-07-16 | Michael Jon Brown | EVP Chief Legal Compliance Off | Sell | −1,700 | −$126.51K |
| 2026-07-07 | Kevin R Sayer | Executive Chair | Sell | −26,756 | −$1.93M |
| 2026-06-17 | Michael Jon Brown | EVP Chief Legal Compliance Off | Sell | −1,700 | −$128.44K |
| 2026-06-17 | Mark G Foletta | Director | Sell | −4,000 | −$296.54K |
| 2026-06-05 | Jon Coleman | EVP, Chief Commercial Officer | Sell | −9,823 | −$722.63K |
| 2026-06-01 | Renee D Gala | Director | A | +5,605 | — |
| 2026-06-01 | Richard Alexander Collins | Director | A | +5,605 | — |
| 2026-06-01 | Euan A. Ashley | Director | A | +5,565 | — |
| 2026-06-01 | Rimma Driscoll | Director | A | +5,605 | — |
| 2026-06-01 | Albert Frederick Osterloh IV | Director | A | +1,630 | — |
| 2026-06-01 | Bridgette P Heller | Director | A | +5,575 | — |
| 2026-06-01 | Mark G Foletta | Director | A | +6,331 | — |
| 2026-06-01 | Nicholas Augustinos | Director | A | +5,575 | — |
| 2026-06-01 | Kyle Malady | Director | A | +5,575 | — |
| 2026-06-01 | Steven R Altman | Director | A | +5,565 | — |
| 2026-05-27 | Jon Coleman | EVP, Chief Commercial Officer | F | −7,362 | −$529.33K |
| 2026-05-27 | Sadie Stern | EVP Chief People & Culture Off | F | −1,451 | −$104.33K |
| 2026-05-27 | Jereme M Sylvain | EVP, Chief Financal Officer | F | −1,451 | −$104.33K |
| 2026-05-27 | Michael Jon Brown | EVP Chief Legal Compliance Off | F | −1,451 | −$104.33K |
| 2026-05-27 | Jacob Steven Leach | President, CEO, and Director | F | −1,451 | −$104.33K |
| 2026-05-26 | Kevin R Sayer | Executive Chair | Sell | −26,759 | −$1.93M |
| 2026-05-19 | Michael Jon Brown | EVP, Chief Legal Officer | Sell | −1,700 | −$101.85K |
| 2026-05-14 | Bridgette P Heller | Director | Sell | −1,012 | −$60.73K |
| 2026-05-11 | Steven R Altman | Director | G | — | — |
| 2026-05-11 | Mark G Foletta | Director | G | — | — |
| 2026-05-11 | Richard Alexander Collins | Director | G | — | — |
| 2026-05-11 | Nicholas Augustinos | Director | G | — | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| Jacob Steven Leach | President, CEO, and Director | 464,753 | $38.84M |
| Eric Topol | Director | 380,545 | $31.81M |
| Kevin R Sayer | Executive Chair | 302,214 | $25.26M |
| Jereme M Sylvain | EVP, COO & CFO | 145,377 | $12.15M |
| Sadie Stern | EVP Chief People & Culture Off | 119,462 | $9.98M |
| Jon Coleman | EVP, Chief Commercial Officer | 100,361 | $8.39M |
| Michael Jon Brown | EVP Chief Legal Compliance Off | 96,734 | $8.09M |
| Steven R Altman | Director | 69,232 | $5.79M |
| Mark G Foletta | Director | 57,183 | $4.78M |
| Richard Alexander Collins | Director | 45,767 | $3.83M |
| Matthew Vincent Dolan | EVP, Strategy & Corporate Dev | 43,227 | $3.61M |
| Nicholas Augustinos | Director | 41,407 | $3.46M |
| Bridgette P Heller | Director | 29,570 | $2.47M |
| Kyle Malady | Director | 28,242 | $2.36M |
| Karen M Dahut | Director | 17,779 | $1.49M |
| Rimma Driscoll | Director | 17,319 | $1.45M |
| Euan A. Ashley | Director | 12,731 | $1.06M |
| Renee D Gala | Director | 12,486 | $1.04M |
| Albert Frederick Osterloh IV | Director | 8,691 | $726.39K |
| Glenn S Boehnlein | Director | 5,883 | $491.70K |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the DXCM quote page; the site-wide leaderboard is on the insider transactions hub.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.