Michael Jon Brown is CLO & VP at DEXCOM INC (DXCM). They have made 3 open-market trades across 1 company since 2023, most recently 2026-09-15.
CIK 0001899922
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 3 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| DXCM | 99,885 | $8.6M |
Shares reported on the most recent Form 4, priced at the 2026-09-16 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| DXCM | SELL · 10b5-1 | 2026-09-15 | 2026-09-16 | $84.04 | $143K | -1.2% | -1.9% | — |
| DXCM | SELL · 10b5-1 | 2026-08-14 | 2026-08-17 | $91.93 | $156K | -0.3% | -2.4% | — |
| DXCM | SELL · 10b5-1 | 2026-07-15 | 2026-07-16 | $74.42 | $127K | -3.7% | +14.2% | +7.4% |
| DXCM | SELL · 10b5-1 | 2026-06-15 | 2026-06-17 | $75.55 | $128K | -7.2% | +5.6% | +19.1% |
| DXCM | SELL · 10b5-1 | 2026-05-15 | 2026-05-19 | $59.91 | $102K | +12.1% | +8.5% | +32.9% |
| DXCM | SELL · 10b5-1 | 2026-04-15 | 2026-04-16 | $63.04 | $107K | -5.0% | +4.3% | +16.4% |
| DXCM | SELL · 10b5-1 | 2026-03-16 | 2026-03-18 | $64.85 | $110K | -8.9% | -5.9% | +7.6% |
| DXCM | SELL · 10b5-1 | 2025-08-15 | 2025-08-18 | $80.29 | $40K | -6.9% | -5.3% | -27.5% |
| DXCM | SELL · 10b5-1 | 2025-07-15 | 2025-07-17 | $86.03 | $43K | +5.5% | -4.6% | -22.8% |
| DXCM | SELL · 10b5-1 | 2025-06-16 | 2025-06-18 | $82.80 | $41K | +2.4% | +2.8% | -6.2% |
| DXCM | SELL · 10b5-1 | 2025-05-23 | 2025-05-28 | $84.28 | $843K | -2.2% | -1.5% | -13.2% |
| DXCM | SELL | 2025-03-12 | 2025-03-14 | $70.38 | $1.8M | +2.6% | -4.2% | +17.8% |
| DXCM | SELL · 10b5-1 | 2024-08-30 | 2024-09-03 | $70.00 | $48K | -2.7% | -8.1% | +11.0% |
| DXCM | SELL · 10b5-1 | 2024-07-31 | 2024-08-01 | $69.55 | $45K | +2.3% | +4.2% | +3.4% |
| DXCM | SELL · 10b5-1 | 2024-06-28 | 2024-06-28 | $114.29 | $151K | -0.3% | -40.3% | -40.2% |
| DXCM | SELL · 10b5-1 | 2024-05-31 | 2024-05-31 | $119.24 | $155K | -0.8% | -5.1% | -41.1% |
| DXCM | SELL · 10b5-1 | 2024-04-30 | 2024-05-02 | $126.25 | $159K | -1.0% | -9.4% | -46.7% |
| DXCM | SELL · 10b5-1 | 2024-03-28 | 2024-03-29 | $140.03 | $721K | +1.1% | -9.4% | -17.5% |
| DXCM | SELL | 2024-03-12 | 2024-03-14 | $134.41 | $2.4M | +6.9% | +2.8% | -10.5% |
| DXCM | SELL · 10b5-1 | 2023-12-01 | 2023-12-04 | $114.68 | $725K | +5.8% | +3.4% | +5.1% |
| DXCM | SELL | 2023-04-03 | 2023-04-05 | $114.31 | $688K | +5.3% | +7.0% | +13.4% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.