Quest Diagnostics (DGX) Superinvestor holders
21 of the superinvestors we track hold Quest Diagnostics (DGX) in their latest 13F filings, $2.1B in total.
Summary
The largest holder is Mark Donovan (Boston Partners), with $1.0B, 0.9% of the portfolio.
In their latest quarter: 1 opened a new position, 9 added, 10 trimmed.
Who holds it
Each investor's latest 13F filing, largest stake first. What a 13F shows.
| Investor | Last change | Shares | Value | % of portfolio | Filed for |
|---|---|---|---|---|---|
| Mark Donovan Boston Partners |
Added | 4,744,473 | $1.0B | 0.9% | Q2 2026 |
| Jeremy Grantham GMO |
Added | 1,888,207 | $400M | 0.9% | Q2 2026 |
| Christopher Davis Davis Selected Advisers |
Trimmed | 1,555,612 | $330M | 1.4% | Q2 2026 |
| Acadian Acadian Asset Management |
Added | 444,668 | $104M | 0.1% | Q3 2026 |
| Pat English Fiduciary Management (FMI) |
Trimmed | 483,557 | $102M | 1.5% | Q2 2026 |
| Paul Marshall Marshall Wace |
Added | 269,760 | $57M | 0.0% | Q2 2026 |
| Joel Greenblatt Gotham Asset Management |
Trimmed | 117,533 | $25M | 0.1% | Q2 2026 |
| Cliff Asness AQR Capital Management |
Added | 61,196 | $13M | 0.0% | Q2 2026 |
| Will Nasgovitz Heartland Advisors |
Trimmed | 45,311 | $10M | 0.4% | Q2 2026 |
| Robert Olstein Olstein Capital Management |
Trimmed | 35,800 | $7M | 1.5% | Q1 2026 |
| Steve Cohen Point72 Asset Management |
New position | 23,380 | $5M | 0.0% | Q2 2026 |
| Ensign Peak Ensign Peak Advisors |
Added | 21,990 | $5M | 0.0% | Q2 2026 |
| Teewinot Capital Teewinot Capital Advisers |
Trimmed | 18,251 | $4M | 0.3% | Q2 2026 |
| Wasatch Wasatch Global Investors |
Trimmed | 16,303 | $4M | 0.0% | Q3 2026 |
| Alan Howard Brevan Howard |
Added | 15,507 | $3M | 0.0% | Q2 2026 |
| Jean-Marie Eveillard First Eagle Investment Management |
Added | 7,606 | $2M | 0.0% | Q2 2026 |
| David Shaw D. E. Shaw & Co. |
Trimmed | 4,814 | $1M | 0.0% | Q2 2026 |
| Ray Dalio Bridgewater Associates |
Added | 3,756 | $796,084 | 0.0% | Q2 2026 |
| Murray Stahl Horizon Kinetics LLC |
Held | 2,900 | $614,655 | 0.0% | Q2 2026 |
| Man Group Man Group plc |
Trimmed | 2,336 | $495,116 | 0.0% | Q2 2026 |
| Fred DiSanto Ancora Holdings |
Trimmed | 137 | $28,957 | 0.0% | Q2 2026 |
Holders by quarter
| Quarter | Superinvestors holding it |
|---|---|
| Q2 2026 | 20 |
| Q1 2026 | 23 |
| Q4 2025 | 25 |
| Q3 2025 | 22 |
| Q2 2025 | 22 |
| Q1 2025 | 25 |
| Q4 2024 | 25 |
| Q3 2024 | 26 |
Questions about Quest Diagnostics
Which superinvestors own Quest Diagnostics?
21 of the superinvestors we track hold Quest Diagnostics (DGX) in their latest 13F filings, $2.1B in total. Mark Donovan, Jeremy Grantham, Christopher Davis, Acadian, Pat English, Paul Marshall.
Who is the largest superinvestor holder of DGX?
The largest holder is Mark Donovan (Boston Partners), with $1.0B, 0.9% of the portfolio.
From Quest Diagnostics's annual reports filed with the SEC (XBRL data), standardised by Investingly. Information only, not investment advice.