Jereme M. Sylvain is CFO & VP at DEXCOM INC (DXCM). They have made 25 open-market trades across 1 company since 2020, most recently 2026-09-10.
CIK 0001681267
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 25 sales. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| DXCM | SELL · 10b5-1 | 2026-09-10 | 2026-09-14 | $83.27 | $303K | +3.8% | -0.9% | — |
| DXCM | SELL · 10b5-1 | 2025-09-02 | 2025-09-04 | $74.17 | $716K | -5.3% | -17.9% | -19.8% |
| DXCM | SELL | 2025-03-12 | 2025-03-14 | $70.38 | $1.7M | +2.6% | -4.2% | +17.8% |
| DXCM | SELL | 2025-03-10 | 2025-03-11 | $73.83 | $1.0M | +3.7% | -5.5% | +20.4% |
| DXCM | SELL | 2025-01-29 | 2025-01-30 | $86.91 | $363K | -0.6% | -1.0% | -17.8% |
| DXCM | SELL | 2024-12-16 | 2024-12-17 | $76.87 | $114K | +1.0% | +9.8% | -7.6% |
| DXCM | SELL · 10b5-1 | 2024-11-15 | 2024-11-18 | $75.51 | $264K | +3.0% | -0.6% | +19.6% |
| DXCM | SELL | 2024-09-09 | 2024-09-11 | $69.15 | $103K | +1.8% | +1.1% | +16.0% |
| DXCM | SELL | 2024-06-10 | 2024-06-11 | $115.05 | $171K | -5.2% | -3.4% | -40.2% |
| DXCM | SELL | 2024-03-12 | 2024-03-14 | $134.41 | $3.1M | +6.9% | +2.8% | -10.5% |
| DXCM | SELL · 10b5-1 | 2024-02-20 | 2024-02-21 | $116.73 | $785K | +4.0% | +13.3% | +11.3% |
| DXCM | SELL | 2024-01-16 | 2024-01-17 | $123.63 | $676K | -1.6% | -7.3% | +8.1% |
| DXCM | SELL | 2023-08-22 | 2023-08-22 | $104.38 | $385K | -4.9% | -16.9% | +1.7% |
| DXCM | SELL | 2023-05-22 | 2023-05-23 | $117.58 | $282K | +8.5% | +10.1% | -8.9% |
| DXCM | SELL | 2023-02-22 | 2023-02-22 | $114.54 | $275K | +1.5% | +2.2% | +3.7% |
| DXCM | SELL | 2022-11-21 | 2022-11-22 | $112.62 | $270K | +4.4% | +1.8% | +2.1% |
| DXCM | SELL | 2022-06-06 | 2022-06-06 | $301.57 | $181K | -7.1% | +7.0% | +12.0% |
| DXCM | SELL | 2022-03-04 | 2022-03-04 | $422.94 | $254K | +0.1% | +19.6% | -28.6% |
| DXCM | SELL | 2021-12-06 | 2021-12-06 | $517.59 | $311K | -1.7% | -9.4% | -21.8% |
| DXCM | SELL | 2021-09-09 | 2021-09-13 | $541.36 | $438K | +5.6% | +1.0% | +1.3% |
| DXCM | SELL | 2021-09-07 | 2021-09-08 | $545.41 | $640K | +3.0% | -2.3% | +3.1% |
| DXCM | SELL | 2021-05-24 | 2021-05-26 | $346.74 | $208K | +10.3% | +21.7% | +45.7% |
| DXCM | SELL | 2021-03-10 | 2021-03-12 | $362.92 | $683K | +0.6% | +9.4% | +12.8% |
| DXCM | SELL | 2021-02-24 | 2021-02-26 | $404.00 | $242K | -11.0% | -12.7% | -9.6% |
| DXCM | SELL | 2020-11-24 | 2020-11-25 | $320.37 | $192K | +9.6% | +14.1% | +28.1% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.