Peter Maag is Chairman at CareDx, Inc. (CDNA). They have made 57 open-market trades across 2 companies since 2014, most recently 2025-07-07.
CIK 0001613855
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.
5 open-market purchases totalling $341K since 2014, against 52 sales. Across 5 scored buys the stock is up 39.4% at ninety days, and 35.9 points ahead of the S&P over the same stretch.
5 scored purchases · one row per filing · discretionary only
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 40% | 80% | 80% |
| Avg Move | +0.4% | +10.3% | +39.4% |
| Alpha | +2.9% | +10.1% | +35.9% |
| Scored | 5 | 5 | 5 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| CDNA | SELL | 2025-07-07 | 2025-07-10 | $18.58 | $372K | -36.7% | -42.8% | -28.1% |
| CDNA | SELL · 10b5-1 | 2025-06-17 | 2025-06-20 | $19.24 | $385K | +3.9% | -32.0% | -21.3% |
| CDNA | SELL · 10b5-1 | 2025-04-30 | 2025-05-02 | $17.23 | $458K | +9.0% | +16.2% | -16.4% |
| CDNA | SELL · 10b5-1 | 2024-11-26 | 2024-12-03 | $25.00 | $125K | -7.1% | -12.6% | -14.1% |
| CDNA | SELL | 2024-08-20 | 2024-08-22 | $33.04 | $2.3M | -11.3% | -10.8% | -28.3% |
| CDNA | SELL | 2023-07-13 | 2023-07-13 | $10.34 | $52K | +8.6% | -7.8% | -42.0% |
| CDNA | SELL · 10b5-1 | 2023-06-28 | 2023-06-28 | $8.72 | $21K | +18.7% | +28.1% | -15.5% |
| MIRO | BUY | 2023-03-10 | 2023-03-30 | $1.60 | $50K | -21.3% | -21.3% | +8.5% |
| CDNA | SELL | 2023-02-08 | 2023-02-08 | $15.75 | $103K | -16.0% | -40.5% | -46.8% |
| CDNA | SELL | 2023-02-02 | 2023-02-03 | $17.17 | $172K | -4.7% | -35.3% | -47.7% |
| CDNA | SELL | 2022-08-11 | 2022-08-11 | $24.65 | $986K | -9.5% | -14.9% | -35.5% |
| CDNA | SELL | 2022-04-05 | 2022-04-06 | $38.64 | $773K | -9.7% | -30.9% | -33.1% |
| CDNA | SELL | 2022-03-07 | 2022-03-08 | $32.81 | $328K | +16.1% | +10.2% | -29.0% |
| CDNA | SELL | 2022-02-07 | 2022-02-08 | $42.07 | $421K | -11.2% | -19.8% | -47.7% |
| CDNA | SELL | 2022-01-05 | 2022-01-06 | $44.45 | $889K | -6.1% | +7.2% | -6.6% |
| CDNA | SELL | 2021-12-06 | 2021-12-07 | $41.60 | $820K | +2.1% | -9.2% | -27.4% |
| CDNA | SELL | 2021-11-05 | 2021-11-09 | $49.40 | $494K | -8.9% | -10.4% | -9.4% |
| CDNA | SELL | 2021-10-05 | 2021-10-06 | $64.67 | $1.3M | +12.2% | -25.6% | -27.1% |
| CDNA | SELL | 2021-09-07 | 2021-09-07 | $73.67 | $737K | -7.8% | -10.1% | -41.7% |
| CDNA | SELL | 2021-08-05 | 2021-08-09 | $83.13 | $1.7M | -12.3% | -12.1% | -41.0% |
| CDNA | SELL | 2021-07-06 | 2021-07-07 | $90.70 | $907K | -8.2% | -4.1% | -23.1% |
| CDNA | SELL | 2021-06-24 | 2021-06-25 | $95.29 | $1.9M | -9.8% | -14.1% | -30.4% |
| CDNA | SELL | 2021-06-09 | 2021-06-11 | $90.00 | $227K | +3.0% | -7.2% | -23.5% |
| CDNA | SELL | 2021-06-08 | 2021-06-09 | $90.05 | $176K | +2.1% | -2.6% | -18.4% |
| CDNA | SELL | 2021-06-07 | 2021-06-08 | $86.25 | $2.3M | -0.4% | -2.8% | -17.6% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.