Robert Gardner Harrison is Chief Information Officer at MYRIAD GENETICS INC (MYGN). They have made 23 open-market trades across 2 companies since 2008, most recently 2026-03-11.
CIK 0001421563
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 23 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| SERA | 76,712 | $156K |
| MYGN | 25,844 | $103K |
| Total | $259K |
Shares reported on the most recent Form 4, priced at the 2026-03-12 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| SERA | SELL | 2026-03-11 | 2026-03-12 | $2.04 | $1K | +1.0% | +9.5% | -0.5% |
| SERA | SELL | 2026-03-09 | 2026-03-10 | $1.96 | $7K | -8.0% | +11.2% | +13.3% |
| SERA | SELL · 10b5-1 | 2026-02-24 | 2026-02-24 | $2.34 | $5K | -18.6% | -16.9% | -10.2% |
| SERA | SELL · 10b5-1 | 2026-01-27 | 2026-01-27 | $2.97 | $6K | -16.0% | -23.7% | -31.7% |
| SERA | SELL · 10b5-1 | 2025-12-30 | 2025-12-30 | $3.00 | $6K | +22.3% | -4.8% | -34.7% |
| SERA | SELL | 2025-12-10 | 2025-12-11 | $3.31 | $2K | +4.2% | +4.4% | -44.0% |
| SERA | SELL · 10b5-1 | 2025-12-02 | 2025-12-03 | $2.93 | $6K | +7.3% | -4.8% | -33.0% |
| SERA | SELL | 2025-11-10 | 2025-11-12 | $2.62 | $17K | +8.7% | +12.9% | -14.8% |
| SERA | SELL · 10b5-1 | 2025-11-04 | 2025-11-04 | $3.07 | $6K | -3.0% | -2.3% | -8.9% |
| SERA | SELL · 10b5-1 | 2025-10-07 | 2025-10-08 | $3.18 | $6K | +7.3% | -19.7% | -5.7% |
| SERA | SELL | 2025-09-11 | 2025-09-12 | $3.13 | $2K | -3.1% | -3.8% | +6.6% |
| SERA | SELL · 10b5-1 | 2025-09-09 | 2025-09-09 | $3.05 | $6K | +8.6% | +5.3% | +0.3% |
| SERA | SELL · 10b5-1 | 2025-08-20 | 2025-08-20 | $2.22 | $13K | +45.4% | +44.1% | +36.2% |
| SERA | SELL | 2025-08-08 | 2025-08-11 | $2.54 | $15K | +3.0% | +32.9% | +10.4% |
| SERA | SELL | 2025-06-10 | 2025-06-11 | $1.48 | $987 | +35.3% | +89.3% | +106.7% |
| SERA | SELL | 2025-05-08 | 2025-05-09 | $2.44 | $16K | -16.5% | -34.8% | +13.0% |
| SERA | SELL · 10b5-1 | 2025-03-07 | 2025-03-10 | $4.16 | $16K | -5.1% | -16.4% | -63.8% |
| SERA | SELL | 2025-03-06 | 2025-03-07 | $4.16 | $14K | -1.2% | -19.1% | -61.8% |
| SERA | SELL · 10b5-1 | 2025-02-13 | 2025-02-14 | $4.28 | $15K | +1.7% | +2.7% | -40.8% |
| SERA | SELL | 2025-02-12 | 2025-02-14 | $4.58 | $33K | +1.7% | +2.7% | -40.8% |
| SERA | SELL · 10b5-1 | 2025-02-11 | 2025-02-13 | $3.97 | $2K | -1.4% | -2.6% | -47.1% |
| SERA | SELL · 10b5-1 | 2025-01-10 | 2025-01-14 | $7.28 | $210K | -8.8% | -37.3% | -51.0% |
| SERA | SELL | 2024-11-11 | 2024-11-12 | $7.32 | $35K | -11.1% | +16.0% | -39.5% |
| SERA | SELL | 2024-08-07 | 2024-08-08 | $7.42 | $37K | -3.7% | -0.3% | +19.4% |
| SERA | SELL | 2024-05-08 | 2024-05-10 | $9.59 | $47K | -9.4% | -10.7% | -18.1% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.