Gary S. Guthart is CEO & President at INTUITIVE SURGICAL INC (ISRG). They have made 39 open-market trades across 1 company since 2006, most recently 2026-08-11.
CIK 0001280628
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 39 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| ISRG | 1,245,679 | $531.8M |
| ILMN | 16,430 | $4.3M |
| AFFX | 24,829 | — |
| Total | $536.1M |
Shares reported on the most recent Form 4, priced at the 2026-08-12 close. 1 holding could not be priced and is excluded from the total.
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 |
|---|---|---|---|---|---|---|---|---|
| ISRG | SELL · 10b5-1 | 2026-08-11 | 2026-08-12 | $400.00 | $4.0M | -7.5% | -8.5% | — |
| ISRG | SELL | 2026-01-27 | 2026-01-28 | $530.24 | $14.5M | -5.4% | -3.4% | -10.4% |
| ISRG | SELL · 10b5-1 | 2025-12-01 | 2025-12-02 | $570.89 | $26.0M | -4.8% | -1.3% | -12.9% |
| ISRG | SELL · 10b5-1 | 2025-10-24 | 2025-10-27 | $547.47 | $33.8M | +0.2% | +5.1% | -3.3% |
| ISRG | SELL · 10b5-1 | 2025-08-29 | 2025-09-02 | $472.49 | $27.7M | -4.3% | -5.8% | +20.7% |
| ISRG | SELL · 10b5-1 | 2025-07-28 | 2025-07-29 | $498.13 | $9.3M | -5.6% | -4.8% | +10.8% |
| ISRG | SELL · 10b5-1 | 2024-10-30 | 2024-10-31 | $511.39 | $24.3M | +7.0% | +8.1% | +14.1% |
| ISRG | SELL · 10b5-1 | 2024-07-30 | 2024-07-31 | $443.56 | $27.3M | +5.0% | +11.1% | +16.5% |
| ISRG | SELL · 10b5-1 | 2024-01-29 | 2024-01-30 | $375.91 | $20.2M | +2.6% | +1.9% | -1.2% |
| ISRG | SELL · 10b5-1 | 2023-10-24 | 2023-10-26 | $261.09 | $15.6M | +5.6% | +19.4% | +40.3% |
| ISRG | SELL | 2023-07-28 | 2023-08-01 | $326.72 | $34.5M | -5.0% | -2.5% | -19.4% |
| ISRG | SELL | 2022-10-21 | 2022-10-24 | $210.84 | $18.6M | +1.4% | +14.5% | +10.8% |
| ISRG | SELL | 2022-07-26 | 2022-07-27 | $216.30 | $34.4M | +6.3% | -6.2% | +5.7% |
| ISRG | SELL | 2021-05-04 | 2021-05-05 | $851.99 | $18.1M | -2.1% | -0.3% | +19.8% |
| ISRG | SELL | 2021-02-02 | 2021-02-03 | $762.14 | $16.8M | +5.6% | -4.9% | +13.2% |
| ISRG | SELL | 2020-12-08 | 2020-12-10 | $761.06 | $21.3M | +8.1% | +7.9% | -4.6% |
| ISRG | SELL | 2020-05-05 | 2020-05-06 | $510.38 | $23.9M | +3.1% | +13.5% | +30.9% |
| ISRG | SELL | 2020-02-05 | 2020-02-06 | $576.56 | $25.6M | +5.8% | -12.2% | -12.0% |
| ISRG | SELL | 2019-12-05 | 2019-12-09 | $582.12 | $26.1M | +2.5% | +1.3% | -11.1% |
| ISRG | SELL | 2019-05-06 | 2019-05-07 | $501.48 | $22.7M | -0.2% | -1.2% | +0.0% |
| ISRG | SELL | 2019-02-04 | 2019-02-05 | $520.47 | $29.3M | +5.2% | +2.3% | -2.5% |
| ISRG | SELL | 2018-12-03 | 2018-12-04 | $542.78 | $30.5M | -4.7% | -10.9% | +8.8% |
| ISRG | SELL | 2018-08-06 | 2018-08-06 | $520.24 | $37.1M | +0.8% | +3.2% | -2.4% |
| ISRG | SELL | 2018-04-30 | 2018-04-30 | $446.96 | $32.8M | +6.4% | +4.5% | +14.3% |
| ISRG | SELL | 2018-02-07 | 2018-02-09 | $414.50 | $3.2M | +6.1% | +11.0% | +18.4% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.