Quest Diagnostics: which funds bought and sold
Institutions that bought and sold Quest Diagnostics shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.
Between March 31, 2026 and June 30, 2026, 529 institutions that filed 13F reports for both quarters added to or opened positions in Quest Diagnostics, and 414 cut or closed them. Together they added a net 972K shares, +0.9% on what they held at the start of the quarter. Active managers and hedge funds on our list were net sellers of 700K shares (−2.7%); index fund managers were net buyers of 464K shares (+1.4%). 103 opened a new position and 70 sold out entirely.
Bought, Q2 2026 529 institutions, 103 of them new holders Sold, Q2 2026 414 institutions, 70 of them sold out
Net change, all compared +972K shares (+0.9%)
Net change, active managers −700K shares (−2.7%), 31 bought, 31 sold
Buyers versus sellers
529 bought 202 414 sold
Active managers and hedge funds 31 bought · 31 sold · −700K
Index fund managers 11 bought · 1 sold · +464K
Other institutions 487 bought · 382 sold · +1.2M
Biggest buyers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Boston Partners Active manager | +732K +18.3% | 4.7M | $1B |
| FMR LLC Active manager | +457K +48.5% | 1.4M | $296M |
| Balyasny Asset Management L.P. Hedge fund | +272K +9402.1% | 275K | $58.4M |
| Mackenzie Financial Corp | +207K +163.5% | 333K | $70.6M |
| Pfa Pension, Forsikringsaktieselskab | +206K New position | 206K | $43.6M |
| UBS Group AG | +187K +26.6% | 889K | $188M |
| Bank Of America Corp | +182K +10.4% | 1.9M | $410M |
| Fil Ltd Active manager | +165K +191.1% | 252K | $53.4M |
| Integral Health Asset Management, LLC | +140K +233.3% | 200K | $42.4M |
| State Street Corp Index funds | +136K +2.5% | 5.5M | $1.2B |
| BNP Paribas Financial Markets | +125K +46.2% | 395K | $83.8M |
| Schroder Investment Management Group Active manager | +123K +41.6% | 418K | $88.8M |
| Eastern Bank | +112K +143.6% | 190K | $40.3M |
| Acadian Asset Management LLC Active manager | +107K +44.7% | 346K | $73.4M |
| Adage Capital Partners Gp, L.L.C. Hedge fund | +106K New position | 106K | $22.5M |
| Blackrock, Inc. Index funds | +103K +1.1% | 9.3M | $2B |
| Nuveen, LLC | +98K +21.1% | 564K | $120M |
| UBS Am, A Distinct Business Unit Of UBS Asset Management Americas LLC | +96K +11.3% | 942K | $200M |
| Amundi | +90K +22.1% | 499K | $106M |
| Vanguard Capital Management LLC Index funds | +88K +1.2% | 7.2M | $1.5B |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Boston Partners Active manager | +732K +18.3% | 4.7M | $1B |
| FMR LLC Active manager | +457K +48.5% | 1.4M | $296M |
| Balyasny Asset Management L.P. Hedge fund | +272K +9402.1% | 275K | $58.4M |
| Fil Ltd Active manager | +165K +191.1% | 252K | $53.4M |
| Schroder Investment Management Group Active manager | +123K +41.6% | 418K | $88.8M |
| Acadian Asset Management LLC Active manager | +107K +44.7% | 346K | $73.4M |
| Adage Capital Partners Gp, L.L.C. Hedge fund | +106K New position | 106K | $22.5M |
| Marshall Wace, LLP Hedge fund | +69K +34.7% | 270K | $57.2M |
| Lazard Asset Management LLC Active manager | +46K +94.6% | 95K | $20M |
| Braidwell LP Hedge fund | +43K New position | 43K | $9.2M |
Biggest sellers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Price T Rowe Associates Inc Active manager | −853K −13.5% | 5.4M | $1.2B |
| Qube Research & Technologies Ltd Hedge fund | −391K −53.3% | 343K | $72.8M |
| Goldman Sachs Group Inc | −366K −27.1% | 983K | $208M |
| Jpmorgan Chase & Co | −326K −8.5% | 3.5M | $749M |
| Victory Capital Management Inc Active manager | −296K −16.0% | 1.6M | $329M |
| Invesco Ltd. | −259K −15.8% | 1.4M | $292M |
| Fiduciary Management Inc Active manager | −237K −32.9% | 484K | $102M |
| Squarepoint Ops LLC Hedge fund | −228K −65.9% | 118K | $25M |
| Citadel Advisors LLC Hedge fund | −214K −61.6% | 133K | $28.2M |
| D. E. Shaw & Co., Inc. Hedge fund | −143K −96.7% | 4,814 | $1M |
| Barclays PLC | −117K −20.6% | 449K | $95.1M |
| Woodline Partners LP Hedge fund | −108K −18.2% | 486K | $103M |
| Man Group PLC Hedge fund | −96K −97.6% | 2,336 | $495,116 |
| Antipodes Partners Ltd Hedge fund | −85K −52.2% | 78K | $16.5M |
| Davis Selected Advisers Active manager | −62K −3.8% | 1.6M | $330M |
| Alliancebernstein L.P. Active manager | −55K −8.1% | 626K | $123M |
| Healthcare Of Ontario Pension Plan Trust Fund | −55K −32.2% | 116K | $24.6M |
| SG Americas Securities, LLC | −54K −25.1% | 163K | $34.5M |
| Canada Pension Plan Investment Board | −51K −91.7% | 4,600 | $974,970 |
| American Century Companies Inc Active manager | −49K −5.7% | 818K | $173M |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Price T Rowe Associates Inc Active manager | −853K −13.5% | 5.4M | $1.2B |
| Qube Research & Technologies Ltd Hedge fund | −391K −53.3% | 343K | $72.8M |
| Victory Capital Management Inc Active manager | −296K −16.0% | 1.6M | $329M |
| Fiduciary Management Inc Active manager | −237K −32.9% | 484K | $102M |
| Squarepoint Ops LLC Hedge fund | −228K −65.9% | 118K | $25M |
| Citadel Advisors LLC Hedge fund | −214K −61.6% | 133K | $28.2M |
| D. E. Shaw & Co., Inc. Hedge fund | −143K −96.7% | 4,814 | $1M |
| Woodline Partners LP Hedge fund | −108K −18.2% | 486K | $103M |
| Man Group PLC Hedge fund | −96K −97.6% | 2,336 | $495,116 |
| Antipodes Partners Ltd Hedge fund | −85K −52.2% | 78K | $16.5M |
New positions
| Institution | Shares | Value June 30, 2026 |
|---|---|---|
| Pfa Pension, Forsikringsaktieselskab | 206K | $43.6M |
| Adage Capital Partners Gp, L.L.C.Hedge fund | 106K | $22.5M |
| Simplify Asset Management Inc. | 50K | $10.5M |
| Cornerstone Advisors, LLC | 47K | $10M |
| Braidwell LPHedge fund | 43K | $9.2M |
| Easterly Investment Partners LLC | 36K | $7.6M |
| Castleark Management LLC | 31K | $6.7M |
| General American Investors Co IncActive manager | 28K | $6M |
| Reliant Investment Management, LLC | 26K | $5.5M |
| Fideuram Asset Management (Ireland) Dac | 28K | $5.4M |
Sold out
| Institution | Shares | Value March 31, 2026 |
|---|---|---|
| Olstein Capital Management, L.P. | 36K | $7M |
| Worldquant Millennium Advisors LLCHedge fund | 27K | $5.2M |
| Capital Fund Management S.A.Hedge fund | 27K | $5.2M |
| Tudor Investment Corp Et AlHedge fund | 18K | $3.6M |
| Soviero Asset Management, LP | 18K | $3.5M |
| Y-Intercept (Hong Kong) Ltd | 13K | $2.6M |
| Zurich Insurance Group Ltd | 12K | $2.3M |
| Arrowstreet Capital, Limited PartnershipHedge fund | 11K | $2.2M |
| Primoris Wealth Advisors, LLC | 11K | $2.1M |
| Bleakley Financial Group, LLC | 11K | $2.1M |
Who holds the shares
- Institutions reporting
- 1,091
- Ten largest holders
- 47.4% of 13F-reported shares
- Index fund managers
- 32.5% of 13F-reported shares
- Active managers and hedge funds
- 24.1% of 13F-reported shares
| Type | Bought | Sold | New | Sold out | Net change in shares | Net % |
|---|---|---|---|---|---|---|
| Active managers and hedge funds | 31 | 31 | 7 | 8 | −700K | −2.7% |
| Index fund managers | 11 | 1 | 0 | 0 | +464K | +1.4% |
| Other institutions | 487 | 382 | 96 | 62 | +1.2M | +2.8% |