AmirAli Talasaz is Chairman & President +1 at Guardant Health, Inc. (GH). They have made 52 open-market trades across 1 company since 2019, most recently 2026-10-01.
CIK 0001753159
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.
2 open-market purchases totalling $21.1M since 2021, against 50 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| GH | 1,842,366 | $292.3M |
Shares reported on the most recent Form 4, priced at the 2026-10-02 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 |
|---|---|---|---|---|---|---|---|---|
| GH | SELL | 2026-08-21 | 2026-08-24 | $169.16 | $6.3M | -1.9% | +7.4% | — |
| GH | SELL | 2026-06-26 | 2026-06-30 | $151.20 | $39.3M | -0.7% | -4.5% | +11.1% |
| GH | SELL | 2026-05-20 | 2026-05-22 | $109.89 | $23.1M | +11.8% | +8.3% | +41.1% |
| GH | SELL | 2026-05-12 | 2026-05-13 | $100.32 | $5.0M | +22.3% | +34.4% | +68.6% |
| GH | SELL | 2025-12-08 | 2025-12-10 | $105.16 | $8.5M | -2.9% | +5.6% | -13.3% |
| GH | SELL · 10b5-1 | 2025-07-01 | 2025-07-02 | $50.87 | $10.2M | -4.4% | -17.6% | +24.2% |
| GH | SELL · 10b5-1 | 2025-06-05 | 2025-06-09 | $50.08 | $11.9M | -0.8% | +3.0% | +21.5% |
| GH | SELL · 10b5-1 | 2025-05-01 | 2025-05-05 | $49.17 | $11.9M | -6.6% | +10.3% | +2.1% |
| GH | BUY | 2023-03-13 | 2023-03-15 | $25.73 | $3.4M | -12.0% | -11.4% | +36.2% |
| GH | BUY | 2021-11-19 | 2021-11-23 | $96.13 | $17.7M | -7.8% | +1.3% | -35.7% |
| GH | SELL | 2021-02-11 | 2021-02-12 | $168.46 | $2.2M | -17.3% | -19.4% | -39.2% |
| GH | SELL | 2021-02-10 | 2021-02-12 | $165.57 | $96.0M | -17.3% | -19.4% | -39.2% |
| GH | SELL | 2021-02-05 | 2021-02-09 | $162.21 | $147.5M | -1.7% | -10.9% | -25.2% |
| GH | SELL | 2021-02-04 | 2021-02-17 | $159.16 | $10.6M | -8.2% | -12.2% | -30.3% |
| GH | SELL | 2021-02-03 | 2021-02-05 | $158.73 | $36.6M | +1.9% | -22.2% | -18.0% |
| GH | SELL | 2021-02-02 | 2021-02-17 | $159.08 | $18.8M | -8.2% | -12.2% | -30.3% |
| GH | SELL | 2021-02-01 | 2021-02-03 | $155.90 | $56.4M | +9.3% | -14.7% | -6.5% |
| GH | SELL | 2020-10-23 | 2020-10-27 | $106.58 | $18.5M | +2.7% | +7.9% | +43.0% |
| GH | SELL | 2020-10-16 | 2020-10-20 | $102.31 | $3.7M | +4.7% | +6.5% | +57.1% |
| GH | SELL | 2020-09-25 | 2020-09-29 | $110.71 | $16.6M | -2.4% | -1.0% | +14.3% |
| GH | SELL | 2020-09-02 | 2020-09-04 | $94.15 | $14.1M | +13.4% | +24.6% | +37.3% |
| GH | SELL | 2020-08-03 | 2020-08-05 | $85.88 | $12.6M | +4.5% | +7.5% | +27.5% |
| GH | SELL | 2020-07-02 | 2020-07-06 | $83.92 | $11.3M | -3.5% | -0.2% | +29.9% |
| GH | SELL | 2020-06-02 | 2020-06-04 | $85.92 | $11.1M | -2.9% | +2.1% | +14.9% |
| GH | SELL | 2020-05-07 | 2020-05-11 | $89.33 | $46.2M | +2.7% | -11.3% | -7.9% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.