Mercedes Johnson is Director at TERADYNE, INC (TER). They have made 17 open-market trades across 4 companies since 2010, most recently 2026-10-01.
CIK 0001225110
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 17 sales. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| TER | SELL · 10b5-1 | 2026-10-01 | 2026-10-02 | $402.90 | $67K | -19.6% | — | — |
| TER | SELL · 10b5-1 | 2026-09-01 | 2026-09-02 | $341.30 | $57K | -1.1% | +33.3% | — |
| TER | SELL · 10b5-1 | 2026-08-03 | 2026-08-04 | $358.15 | $59K | +4.1% | -15.8% | — |
| TER | SELL · 10b5-1 | 2026-07-01 | 2026-07-02 | $460.00 | $77K | -11.4% | -5.2% | +3.8% |
| TER | SELL · 10b5-1 | 2026-06-02 | 2026-06-03 | $369.74 | $62K | +9.6% | -3.8% | -15.0% |
| TER | SELL · 10b5-1 | 2026-04-06 | 2026-04-07 | $312.20 | $195K | +10.6% | +3.0% | +10.4% |
| TER | SELL · 10b5-1 | 2026-03-05 | 2026-03-06 | $299.20 | $187K | +13.1% | +18.9% | +53.4% |
| TER | SELL · 10b5-1 | 2026-02-05 | 2026-02-06 | $266.98 | $167K | +6.1% | -0.4% | +19.0% |
| TER | SELL · 10b5-1 | 2026-01-05 | 2026-01-06 | $211.85 | $132K | +1.1% | +20.2% | +39.8% |
| TER | SELL · 10b5-1 | 2025-12-05 | 2025-12-08 | $200.00 | $125K | -4.9% | +11.1% | +48.1% |
| TER | SELL · 10b5-1 | 2025-11-05 | 2025-11-07 | $177.05 | $221K | -10.7% | +7.8% | +43.9% |
| TER | SELL · 10b5-1 | 2025-10-06 | 2025-10-08 | $147.90 | $185K | -3.7% | +26.1% | +58.3% |
| TER | SELL · 10b5-1 | 2025-09-05 | 2025-09-09 | $120.06 | $150K | +4.3% | +26.4% | +76.7% |
| TER | SELL · 10b5-1 | 2025-08-05 | 2025-08-07 | $106.00 | $66K | +4.1% | +11.9% | +76.6% |
| TER | SELL · 10b5-1 | 2025-07-30 | 2025-08-01 | $105.73 | $396K | +8.5% | +14.8% | +68.4% |
| ADI | SELL · 10b5-1 | 2025-03-05 | 2025-03-06 | $227.12 | $1.4M | -6.5% | -23.4% | -2.3% |
| TER | SELL · 10b5-1 | 2025-03-03 | 2025-03-05 | $110.96 | $69K | -15.7% | -35.8% | -23.9% |
| TER | SELL · 10b5-1 | 2025-02-03 | 2025-02-04 | $112.58 | $141K | +2.2% | -4.9% | -31.9% |
| TER | SELL · 10b5-1 | 2025-01-02 | 2025-01-06 | $126.76 | $79K | -2.0% | -20.3% | -48.4% |
| TER | SELL · 10b5-1 | 2024-12-02 | 2024-12-04 | $110.04 | $69K | +11.4% | +12.4% | -7.7% |
| TER | SELL · 10b5-1 | 2024-11-07 | 2024-11-12 | $111.42 | $139K | +1.1% | +13.0% | +6.5% |
| TER | SELL · 10b5-1 | 2024-10-01 | 2024-10-03 | $132.80 | $83K | -3.5% | -21.0% | -4.1% |
| TER | SELL · 10b5-1 | 2024-09-03 | 2024-09-05 | $133.49 | $167K | +3.8% | +3.7% | -6.4% |
| TER | SELL · 10b5-1 | 2024-08-01 | 2024-08-05 | $128.77 | $161K | +12.5% | +8.3% | -10.9% |
| TER | SELL · 10b5-1 | 2024-07-01 | 2024-07-03 | $148.00 | $93K | +6.8% | -23.2% | -15.5% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.