Heather S. Ace is VP at DEXCOM INC (DXCM). They have made 8 open-market trades across 2 companies since 2014, most recently 2026-10-15.
CIK 0001610762
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 8 sales. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| QCOM | SELL · 10b5-1 | 2026-08-03 | 2026-08-03 | $147.04 | $471K | +5.1% | +8.4% | — |
| QCOM | SELL · 10b5-1 | 2026-05-04 | 2026-05-04 | $177.82 | $569K | +19.3% | +49.2% | -9.6% |
| QCOM | SELL · 10b5-1 | 2026-02-09 | 2026-02-09 | $137.00 | $438K | +3.4% | -2.9% | +72.0% |
| QCOM | SELL · 10b5-1 | 2025-11-07 | 2025-11-10 | $172.87 | $277K | -6.7% | +6.6% | -18.8% |
| QCOM | SELL · 10b5-1 | 2025-08-01 | 2025-08-01 | $146.40 | $234K | +5.4% | +6.9% | +19.4% |
| QCOM | SELL · 10b5-1 | 2025-05-02 | 2025-05-02 | $137.74 | $220K | +10.6% | +6.0% | +6.1% |
| QCOM | SELL · 10b5-1 | 2025-03-12 | 2025-03-12 | $154.24 | $247K | +4.9% | -8.7% | +4.3% |
| DXCM | SELL | 2020-03-11 | 2020-03-13 | $265.05 | $3.2M | +11.3% | +27.1% | +68.7% |
| DXCM | SELL | 2020-03-09 | 2020-03-10 | $270.58 | $3.0M | -22.8% | +1.5% | +35.9% |
| DXCM | SELL | 2019-09-09 | 2019-09-11 | $150.80 | $1.7M | +5.3% | +5.4% | +46.2% |
| DXCM | SELL | 2019-08-23 | 2019-08-26 | $174.81 | $2.2M | -8.9% | -12.7% | +28.7% |
| DXCM | SELL | 2019-03-11 | 2019-03-13 | $142.92 | $2.3M | -15.7% | -19.9% | -5.9% |
| DXCM | SELL | 2018-11-09 | 2018-11-13 | $147.40 | $960K | -11.9% | -14.0% | +5.7% |
| DXCM | SELL | 2018-09-10 | 2018-09-12 | $143.76 | $527K | -3.4% | -13.6% | -16.3% |
| VOLC | SELL · 10b5-1 | 2015-01-02 | 2015-01-05 | $17.88 | $10K | N/A | N/A | N/A |
| VOLC | SELL | 2014-06-12 | 2014-06-13 | $18.24 | $40K | N/A | N/A | N/A |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.