Catherine T. Doherty is VP at QUEST DIAGNOSTICS INC (DGX). They have made 29 open-market trades across 1 company since 2012, most recently 2026-03-05.
CIK 0001520897
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 29 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| DGX | 78,486 | $18.4M |
Shares reported on the most recent Form 4, priced at the 2026-03-06 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 |
|---|---|---|---|---|---|---|---|---|
| DGX | SELL · 10b5-1 | 2026-03-05 | 2026-03-06 | $206.21 | $1.1M | -1.5% | +0.4% | -1.0% |
| DGX | SELL · 10b5-1 | 2026-03-03 | 2026-03-04 | $207.73 | $131K | -3.5% | -3.5% | -6.4% |
| DGX | SELL | 2026-02-19 | 2026-02-20 | $204.83 | $294K | +3.2% | -3.2% | -4.1% |
| DGX | SELL | 2026-02-13 | 2026-02-17 | $206.15 | $5.4M | +3.2% | -5.4% | -7.5% |
| DGX | SELL · 10b5-1 | 2025-03-05 | 2025-03-07 | $174.13 | $1.9M | -3.9% | -6.0% | -0.7% |
| DGX | SELL · 10b5-1 | 2025-03-04 | 2025-03-05 | $175.79 | $252K | +0.9% | -4.5% | +0.9% |
| DGX | SELL · 10b5-1 | 2025-02-27 | 2025-02-28 | $172.61 | $284K | -4.2% | -2.6% | -0.9% |
| DGX | SELL · 10b5-1 | 2025-02-19 | 2025-02-21 | $170.51 | $489K | +0.2% | -2.6% | -1.2% |
| DGX | SELL | 2024-11-27 | 2024-12-02 | $162.88 | $6.2M | -3.4% | -6.6% | +9.5% |
| DGX | SELL · 10b5-1 | 2024-02-28 | 2024-03-01 | $126.45 | $1.7M | +4.3% | +8.6% | +12.3% |
| DGX | SELL · 10b5-1 | 2024-02-22 | 2024-02-23 | $126.14 | $207K | +0.8% | +2.7% | +11.2% |
| DGX | SELL | 2023-03-07 | 2023-03-08 | $140.55 | $1.5M | -3.2% | +4.4% | -3.1% |
| DGX | SELL | 2023-03-03 | 2023-03-06 | $140.63 | $202K | -4.7% | +2.0% | -4.5% |
| DGX | SELL | 2023-02-24 | 2023-02-27 | $141.42 | $478K | -2.4% | +0.2% | -3.1% |
| DGX | SELL | 2022-11-28 | 2022-11-29 | $149.18 | $12.2M | +0.2% | +5.6% | -6.6% |
| DGX | SELL | 2022-03-08 | 2022-03-09 | $135.21 | $1.9M | +7.0% | +4.1% | +2.5% |
| DGX | SELL | 2022-02-24 | 2022-02-28 | $126.26 | $347K | +4.1% | +6.4% | +7.9% |
| DGX | SELL | 2021-11-29 | 2021-12-01 | $156.82 | $11.7M | +8.2% | +14.6% | -12.6% |
| DGX | SELL | 2021-05-07 | 2021-05-11 | $139.96 | $2.4M | -4.8% | -7.1% | +7.2% |
| DGX | SELL | 2020-09-02 | 2020-09-04 | $110.61 | $12.9M | +3.9% | +6.5% | +13.3% |
| DGX | SELL | 2020-03-11 | 2020-03-12 | $104.25 | $521K | -18.1% | -10.7% | +18.1% |
| DGX | SELL | 2020-02-26 | 2020-02-28 | $109.41 | $213K | -6.8% | -22.4% | +10.4% |
| DGX | SELL · 10b5-1 | 2020-02-25 | 2020-02-26 | $112.73 | $46K | +0.8% | -23.8% | +3.4% |
| DGX | SELL | 2019-04-04 | 2019-04-08 | $90.59 | $12.0M | -4.8% | +8.7% | +13.7% |
| DGX | SELL | 2018-03-05 | 2018-03-06 | $101.00 | $561K | +0.4% | -4.0% | +3.2% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.