# Quest Diagnostics (DGX): value investors who own it

3 value investors held Quest Diagnostics in their Q3 2026 13F, led by Davis Selected Advisers, Horizon Kinetics, First Eagle Investment Management.

## 13F holders

| Manager | Portfolio | Value | Change | Quarters held |
| --- | --- | --- | --- | --- |
| Davis Selected Advisers | 1.4% | $330m | Trimmed -3.8% | 50 |
| Horizon Kinetics | 0.0% | $615k | Unchanged | 30 |
| First Eagle Investment Management | 0.0% | $1.6m | Added +154% | 18 |

## Directors buying and selling (Form 4, last 12 months)

| Date | Who | Role | Bought or sold | Shares | Value |
| --- | --- | --- | --- | --- | --- |
| 2026-09-01 | Davis J. E. | CEO and President | Sold | 10000 | $2.4m |
| 2026-08-28 | PREVOZNIK MICHAEL E | SVP & General Counsel | Sold | 16010 | $3.9m |
| 2026-08-28 | PREVOZNIK MICHAEL E | SVP & General Counsel | Sold | 6237 | $1.5m |
| 2026-08-28 | PREVOZNIK MICHAEL E | SVP & General Counsel | Sold | 430 | $105k |
| 2026-07-28 | DELANEY MARK E | SVP & Chief Commercial Officer | Sold | 1600 | $376k |

Source: SEC filings, via moatshark (https://www.moatshark.com/s/dgx). Values traded and returns are estimates. Not investment advice. Built 2026-10-21.