Amal M. Johnson is Director at Mellanox Technologies, Ltd. (MLNX). They have made 44 open-market trades across 4 companies since 2010, most recently 2026-05-12.
CIK 0001388397
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.
6 open-market purchases totalling $1.1M since 2010, against 38 sales. Across 6 scored buys the stock is down 0.5% at ninety days, and 4.5 points behind the S&P over the same stretch.
6 scored purchases · one row per filing · discretionary only
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 17% | 33% | 50% |
| Avg Move | -1.1% | -2.0% | -0.5% |
| Alpha | -53.7% | -2.9% | -4.5% |
| Scored | 6 | 6 | 6 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| ISRG | SELL · 10b5-1 | 2025-01-28 | 2025-01-28 | $566.60 | $2.6M | +2.1% | -1.3% | -10.0% |
| ESS | SELL · 10b5-1 | 2024-09-17 | 2024-09-19 | $316.31 | $4.6M | -6.3% | -6.8% | -9.1% |
| ESS | SELL · 10b5-1 | 2024-08-30 | 2024-09-04 | $300.00 | $736K | +3.7% | -4.7% | -1.0% |
| ISRG | SELL · 10b5-1 | 2024-08-01 | 2024-08-05 | $443.30 | $2.6M | +9.4% | +9.7% | +15.6% |
| ISRG | SELL · 10b5-1 | 2024-01-26 | 2024-01-29 | $370.08 | $5.0M | +2.5% | +2.4% | -0.9% |
| ISRG | SELL · 10b5-1 | 2023-11-16 | 2023-11-17 | $300.00 | $2.9M | +1.8% | +7.5% | +24.5% |
| ESS | BUY | 2022-12-02 | 2022-12-05 | $218.44 | $109K | +1.1% | -0.3% | +8.7% |
| ISRG | SELL | 2022-11-08 | 2022-11-09 | $239.36 | $1.5M | +4.7% | +8.8% | +1.8% |
| ISRG | SELL | 2022-09-08 | 2022-09-09 | $210.76 | $1.3M | -11.7% | -15.5% | +23.2% |
| ISRG | SELL | 2022-08-03 | 2022-08-04 | $238.04 | $1.5M | -1.7% | -14.9% | -0.7% |
| ESS | SELL | 2022-03-15 | 2022-03-16 | $334.96 | $4.7M | +1.7% | +1.3% | -24.4% |
| ISRG | SELL | 2021-11-24 | 2021-11-26 | $333.73 | $2.5M | +2.4% | +9.5% | -13.4% |
| ISRG | SELL | 2021-08-11 | 2021-08-12 | $1001.63 | $2.5M | +4.5% | +2.6% | +7.7% |
| CAMP | BUY | 2021-05-13 | 2021-05-14 | $12.12 | $121K | -2.3% | -3.9% | -3.9% |
| ISRG | SELL | 2021-05-12 | 2021-05-13 | $817.82 | $4.1M | +2.8% | +6.1% | +21.0% |
| ISRG | SELL | 2020-05-20 | 2020-05-21 | $550.00 | $1.6M | +5.0% | +7.7% | +26.4% |
| CAMP | BUY | 2020-05-15 | 2020-05-18 | $5.69 | $341K | -2.3% | -3.9% | -3.9% |
| ISRG | SELL | 2020-02-05 | 2020-02-05 | $577.43 | $4.9M | +4.6% | -4.0% | -11.3% |
| MLNX | SELL | 2019-02-04 | 2019-02-06 | $95.49 | $1.1M | +3.1% | +11.6% | +21.4% |
| MLNX | SELL | 2018-11-07 | 2018-11-08 | $90.00 | $514K | -4.7% | +1.1% | +6.9% |
| ISRG | SELL | 2018-10-23 | 2018-10-24 | $500.00 | $500K | +3.7% | +0.1% | +9.7% |
| ISRG | SELL | 2018-07-24 | 2018-07-25 | $522.02 | $1.6M | -3.0% | +0.8% | -5.6% |
| ISRG | SELL | 2017-11-30 | 2017-12-04 | $396.49 | $1.2M | -2.5% | +3.8% | +14.8% |
| MLNX | SELL | 2017-11-30 | 2017-12-04 | $57.60 | $329K | +5.4% | +10.5% | +16.7% |
| MLNX | SELL | 2017-11-08 | 2017-11-13 | $50.00 | $286K | +19.8% | +26.8% | +26.8% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.