DGX Quest Diagnostics, Inc.
Quest Diagnostics, Inc. (DGX) Institutional Ownership
What the institutions did with DGX last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| BlackRock, Inc. | 9.3M | 8.8% |
| VANGUARD CAPITAL MANAGEMENT LLC | 7.2M | 6.9% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 6.1M | 5.8% |
| STATE STREET CORP | 5.5M | 5.3% |
| PRICE T ROWE ASSOCIATES INC /MD/ | 5.4M | 5.2% |
| Boston Partners | 4.7M | 4.5% |
| JPMORGAN CHASE & CO | 3.5M | 3.4% |
| GEODE CAPITAL MANAGEMENT, LLC | 3.1M | 3.0% |
| MORGAN STANLEY | 2.5M | 2.3% |
| EdgePoint Investment Group Inc. | 2.2M | 2.1% |
| DIMENSIONAL FUND ADVISORS LP | 2.0M | 1.9% |
| BANK OF AMERICA CORP /DE/ | 1.9M | 1.8% |
| Grantham, Mayo, Van Otterloo & Co. LLC | 1.9M | 1.8% |
| WELLS FARGO & COMPANY/MN | 1.8M | 1.7% |
| Davis Selected Advisers | 1.6M | 1.5% |
| VICTORY CAPITAL MANAGEMENT INC | 1.6M | 1.5% |
| NORGES BANK | 1.4M | 1.3% |
| FMR LLC | 1.4M | 1.3% |
| Invesco Ltd. | 1.4M | 1.3% |
| NORTHERN TRUST CORP | 1.1M | 1.1% |
| GOLDMAN SACHS GROUP INC | 982.7K | 0.9% |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 942.4K | 0.9% |
| UBS Group AG | 888.9K | 0.8% |
| AMERICAN CENTURY COMPANIES INC | 818.2K | 0.8% |
| M&G PLC | 795.7K | 0.8% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| PRICE T ROWE ASSOCIATES INC /MD/ | Reduced | 6.3M | 5.4M | -853.0K |
| Boston Partners | Increased | 4.0M | 4.7M | +732.2K |
| FMR LLC | Increased | 942.2K | 1.4M | +456.5K |
| Qube Research & Technologies Ltd | Reduced | 734.7K | 343.4K | -391.3K |
| GOLDMAN SACHS GROUP INC | Reduced | 1.3M | 982.7K | -366.0K |
| JPMORGAN CHASE & CO | Reduced | 3.8M | 3.5M | -326.0K |
| VICTORY CAPITAL MANAGEMENT INC | Reduced | 1.8M | 1.6M | -295.8K |
| Balyasny Asset Management L.P. | Increased | 2.9K | 275.4K | +272.5K |
| Invesco Ltd. | Reduced | 1.6M | 1.4M | -259.4K |
| FIDUCIARY MANAGEMENT INC /WI/ | Reduced | 721.0K | 483.6K | -237.4K |
| Squarepoint Ops LLC | Reduced | 345.8K | 117.8K | -228.0K |
| CITADEL ADVISORS LLC | Reduced | 347.2K | 133.2K | -214.0K |
| MACKENZIE FINANCIAL CORP | Increased | 126.5K | 333.3K | +206.8K |
| PFA Pension, Forsikringsaktieselskab | New | 0 | 205.6K | +205.6K |
| UBS Group AG | Increased | 702.3K | 888.9K | +186.6K |
| BANK OF AMERICA CORP /DE/ | Increased | 1.8M | 1.9M | +182.2K |
| FIL Ltd | Increased | 86.6K | 252.0K | +165.4K |
| D. E. Shaw & Co., Inc. | Reduced | 147.7K | 4.8K | -142.9K |
| Integral Health Asset Management, LLC | Increased | 60.0K | 200.0K | +140.0K |
| STATE STREET CORP | Increased | 5.4M | 5.5M | +135.8K |
| BNP PARIBAS FINANCIAL MARKETS | Increased | 270.3K | 395.2K | +125.0K |
| SCHRODER INVESTMENT MANAGEMENT GROUP | Increased | 295.0K | 417.7K | +122.7K |
| BARCLAYS PLC | Reduced | 565.5K | 448.7K | -116.7K |
| EASTERN BANK | Increased | 78.0K | 190.0K | +112.0K |
| Woodline Partners LP | Reduced | 593.7K | 485.8K | -107.9K |
| ACADIAN ASSET MANAGEMENT LLC | Increased | 239.4K | 346.5K | +107.1K |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | New | 0 | 106.3K | +106.3K |
| BlackRock, Inc. | Increased | 9.2M | 9.3M | +103.1K |
| Nuveen, LLC | Increased | 465.4K | 563.8K | +98.4K |
| Man Group plc | Reduced | 98.2K | 2.3K | -95.8K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | Increased | 846.6K | 942.4K | +95.8K |
| Amundi | Increased | 408.3K | 498.8K | +90.4K |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 7.1M | 7.2M | +87.7K |
| ANTIPODES PARTNERS Ltd | Reduced | 162.6K | 77.8K | -84.8K |
| STRS OHIO | Increased | 2.7K | 76.8K | +74.1K |
| MARSHALL WACE, LLP | Increased | 200.3K | 269.8K | +69.5K |
| NATIONAL BANK OF CANADA /FI/ | Increased | 49.0K | 117.0K | +68.0K |
| Davis Selected Advisers | Reduced | 1.6M | 1.6M | -62.2K |
| M.D. Sass, LLC | Increased | 299.5K | 360.5K | +61.0K |
| Savant Capital, LLC | Increased | 3.6K | 61.5K | +57.9K |
| ALLIANCEBERNSTEIN L.P. | Reduced | 681.2K | 625.9K | -55.3K |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | Reduced | 170.9K | 115.9K | -55.0K |
| SG Americas Securities, LLC | Reduced | 217.3K | 162.8K | -54.4K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 3.1M | 3.1M | +51.6K |
| CANADA PENSION PLAN INVESTMENT BOARD | Reduced | 55.3K | 4.6K | -50.7K |
| Simplify Asset Management Inc. | New | 0 | 49.7K | +49.7K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 6.1M | 6.1M | +49.6K |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | Increased | 230.9K | 280.3K | +49.4K |
| AMERICAN CENTURY COMPANIES INC | Reduced | 867.3K | 818.2K | -49.1K |
| AMERIPRISE FINANCIAL INC | Reduced | 807.5K | 760.0K | -47.5K |
| RAYMOND JAMES FINANCIAL INC | Increased | 458.5K | 505.8K | +47.3K |
| Cornerstone Advisors, LLC | New | 0 | 47.2K | +47.2K |
| LAZARD ASSET MANAGEMENT LLC | Increased | 48.6K | 94.5K | +45.9K |
| HRT FINANCIAL LP | New | 0 | 43.9K | +43.9K |
| Pacer Advisors, Inc. | Reduced | 425.9K | 382.0K | -43.9K |
| BRAIDWELL LP | New | 0 | 43.2K | +43.2K |
| SEB Asset Management AB | Increased | 140.0K | 182.9K | +43.0K |
| California Public Employees Retirement System | Reduced | 237.8K | 196.2K | -41.6K |
| MILLENNIUM MANAGEMENT LLC | Reduced | 50.2K | 11.4K | -38.7K |
| DIMENSIONAL FUND ADVISORS LP | Increased | 1.9M | 2.0M | +38.5K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.