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# Who owns QUEST DIAGNOSTICS INC (DGX)? Elite investor 13F holders

8 tracked elite investors reported holding QUEST DIAGNOSTICS INC as of 2026-06-30, including GMO, Davis Advisors, D.E. Shaw, Gotham Asset Management, First Eagle Investment Management. Who bought, trimmed or exited each quarter, with links to the original SEC 13F filings.

8 tracked investors currently reported holding · Latest report period: 2026-06-30 · Health Care · Health Care Equipment & Services

Quest Diagnostics Incorporated provides diagnostic testing and services in the United States. The company develops and delivers diagnostic information services, such as routine, non-routine and advanced clinical testing, anatomic pathology testing, and other diagnostic information services. It also provides services under the Quest Diagnostics brand, as well as under the AmeriPath, Dermpath…

## Reported holders and securities, including exits (up to 20)

| Investor | Security | Instrument | Report period | Filed | Value | Quantity | Units | Change | Source |
|  --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| [GMO](https://ownershiptrace.com/13f/investors/94674) | QUEST DIAGNOSTICS INC | SHARE | 2026-06-30 | 2026-08-13 00:00:00 | 400206122.00 USD | 1888207.000000 | Shares | add | [Original filing](https://www.sec.gov/Archives/edgar/data/1352662/0001072613-26-000636-index.html) |
| [Davis Advisors](https://ownershiptrace.com/13f/investors/18) | QUEST DIAGNOSTICS INC | SHARE | 2026-06-30 | 2026-08-11 00:00:00 | 329781509.00 USD | 1555612.000000 | Shares | reduce | [Original filing](https://www.sec.gov/Archives/edgar/data/1036325/0001036325-26-000020-index.html) |
| [D.E. Shaw](https://ownershiptrace.com/13f/investors/98) | QUEST DIAGNOSTICS INC | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 1020327.00 USD | 4814.000000 | Shares | reduce | [Original filing](https://www.sec.gov/Archives/edgar/data/1009207/0001104659-26-097217-index.html) |
| [Gotham Asset Management](https://ownershiptrace.com/13f/investors/94672) | QUEST DIAGNOSTICS INC | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 24911119.00 USD | 117533.000000 | Shares | reduce | [Original filing](https://www.sec.gov/Archives/edgar/data/1510387/0001398344-26-014644-index.html) |
| [Tudor Investment](https://ownershiptrace.com/13f/investors/94675) | QUEST DIAGNOSTICS INC | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 0.00 USD | 0.000000 | Shares | exited | [Original filing](https://www.sec.gov/Archives/edgar/data/923093/0000902664-26-003485-index.html) |
| [First Eagle Investment Management](https://ownershiptrace.com/13f/investors/32) | QUEST DIAGNOSTICS INC | SHARE | 2026-06-30 | 2026-08-05 00:00:00 | 1612092.00 USD | 7606.000000 | Shares | add | [Original filing](https://www.sec.gov/Archives/edgar/data/1325447/0001325447-26-000020-index.html) |
| [Bridgewater Associates](https://ownershiptrace.com/13f/investors/8) | QUEST DIAGNOSTICS INC | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 796084.00 USD | 3756.000000 | Shares | add | [Original filing](https://www.sec.gov/Archives/edgar/data/1350694/0001350694-26-000003-index.html) |
| [Maverick Capital](https://ownershiptrace.com/13f/investors/50) | QUEST DIAGNOSTICS INC | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 0.00 USD | 0.000000 | Shares | exited | [Original filing](https://www.sec.gov/Archives/edgar/data/934639/0000947871-26-000793-index.html) |
| [Check Capital Management](https://ownershiptrace.com/13f/investors/89) | QUEST DIAGNOSTICS INC | SHARE | 2026-06-30 | 2026-08-03 00:00:00 | 275536.00 USD | 1300.000000 | Shares | hold | [Original filing](https://www.sec.gov/Archives/edgar/data/1032814/0001032814-26-000005-index.html) |
| [Ancora Advisors / Ancora Holdings](https://ownershiptrace.com/13f/investors/101) | QUEST DIAGNOSTICS INC | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 28957.00 USD | 137.000000 | Shares | reduce | [Original filing](https://www.sec.gov/Archives/edgar/data/1446114/0001446114-26-000012-index.html) |

Public disclosures can be delayed, incomplete, or amended. Report period describes a position date; transaction date describes a reported transaction; filed describes submission. A recent filing or page update does not establish a current holding. A dash means unavailable or not comparable, not zero.

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