DGX Institutional Ownership & Shareholders
QUEST DIAGNOSTICS INC (DGX) is currently held by 1,107 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $21.86B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of DGX tracked by InsiderSet, reporting ownership valued at approximately $1.97B in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $2.34B, representing an estimated gain of +18.81% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 48% of the total disclosed DGX value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Vanguard Capital Management Llc, Vanguard Portfolio Management Llc, and several other long-term asset managers with concentrated positions in QUEST DIAGNOSTICS INC (DGX).
This page ranks the largest institutional DGX shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
1,107
Total Reported Value
$21.86B
Largest Holder
Blackrock, Inc.
Largest Position
$1.97B
Insider Transactions (90d)
15
Latest Filing Quarter
Q2 2026
New Institutional Positions
38
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.03% | 9,275,411 | $1,965,923,399 | $2,335,733,998 | +$369,810,599 | +18.81% | |
| Vanguard Capital Management Llc | 0.03% | 7,233,394 | $1,533,117,858 | $1,821,513,277 | +$288,395,419 | +18.81% | |
| Vanguard Portfolio Management Llc | 0.06% | 6,131,045 | $1,299,474,988 | $1,543,919,752 | +$244,444,764 | +18.81% | |
| State Street Corp | 0.03% | 5,516,643 | $1,169,252,484 | $1,389,201,040 | +$219,948,556 | +18.81% | |
| Price T Rowe Associates Inc | 0.12% | 5,444,986 | $1,154,066,000 | $1,371,156,375 | +$217,090,375 | +18.81% | |
| Boston Partners | 0.89% | 4,744,473 | $1,004,552,880 | $1,194,753,191 | +$190,200,311 | +18.93% | |
| Jpmorgan Chase & Co | 0.04% | 3,520,438 | $748,586,197 | $886,516,697 | +$137,930,500 | +18.43% | |
| Geode Capital Management, Llc | 0.04% | 3,137,873 | $662,582,607 | $790,179,179 | +$127,596,572 | +19.26% | |
| Morgan Stanley | 0.03% | 2,460,497 | $521,503,271 | $619,602,355 | +$98,099,084 | +18.81% | |
| Edgepoint Investment Group Inc. | 3.60% | 2,247,568 | $476,372,038 | $565,982,574 | +$89,610,536 | +18.81% | |
| Dimensional Fund Advisors Lp | 0.08% | 1,988,048 | $421,376,156 | $500,630,247 | +$79,254,091 | +18.81% | |
| Bank Of America Corp | 0.03% | 1,935,133 | $410,151,497 | $487,305,192 | +$77,153,695 | +18.81% | |
| Grantham, Mayo, Van Otterloo & Co. Llc | 0.90% | 1,888,207 | $400,206,122 | $475,488,287 | +$75,282,165 | +18.81% | |
| Wells Fargo & Company/Mn | 0.06% | 1,751,220 | $371,171,119 | $440,992,220 | +$69,821,101 | +18.81% | |
| Davis Selected Advisers | 1.42% | 1,555,612 | $329,781,509 | $391,734,214 | +$61,952,705 | +18.79% | |
| Victory Capital Management Inc | 0.18% | 1,550,556 | $328,640,375 | $390,461,012 | +$61,820,637 | +18.81% | |
| Norges Bank | 0.03% | 1,406,620 | $298,133,109 | $354,215,048 | +$56,081,939 | +18.81% | |
| Fmr Llc | 0.01% | 1,398,735 | $296,462,102 | $352,229,448 | +$55,767,346 | +18.81% | |
| Invesco Ltd. | 0.02% | 1,379,115 | $292,303,423 | $347,288,739 | +$54,985,316 | +18.81% | |
| Northern Trust Corp | 0.03% | 1,127,454 | $238,963,873 | $283,915,466 | +$44,951,593 | +18.81% | |
| Goldman Sachs Group Inc | 0.02% | 982,694 | $208,282,052 | $247,462,003 | +$39,179,951 | +18.81% | |
| Ubs Group Ag | 0.03% | 888,906 | $188,403,627 | $223,844,309 | +$35,440,682 | +18.81% | |
| American Century Companies Inc | 0.08% | 818,220 | $173,422,135 | $206,044,160 | +$32,622,025 | +18.81% | |
| M&G Plc | 0.84% | 795,650 | $168,677,800 | $200,360,583 | +$31,682,783 | +18.78% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.03% | 846,603 | $165,917,256 | $213,191,567 | +$47,274,311 | +28.49% | |
| Charles Schwab Investment Management Inc | 0.02% | 773,711 | $163,988,047 | $194,835,904 | +$30,847,857 | +18.81% | |
| Ameriprise Financial Inc | 0.03% | 759,975 | $161,076,730 | $191,376,905 | +$30,300,175 | +18.81% | |
| Legal & General Group Plc | 0.03% | 717,085 | $151,986,161 | $180,576,345 | +$28,590,184 | +18.81% | |
| Bank Of New York Mellon Corp | 0.02% | 629,339 | $133,388,337 | $158,480,147 | +$25,091,810 | +18.81% | |
| Vanguard Fiduciary Trust Co | 0.03% | 621,639 | $131,756,386 | $156,541,133 | +$24,784,747 | +18.81% | |
| Deutsche Bank Ag\ | 0.04% | 585,895 | $124,180,445 | $147,540,079 | +$23,359,634 | +18.81% | |
| Alliancebernstein L.P. | 0.04% | 625,894 | $122,662,706 | $157,612,627 | +$34,949,921 | +28.49% | |
| Nuveen, Llc | 0.03% | 563,830 | $119,503,667 | $141,983,671 | +$22,480,004 | +18.81% | |
| Principal Financial Group Inc | 0.06% | 468,720 | $109,246,624 | $118,033,070 | +$8,786,446 | +8.04% | |
| Raymond James Financial Inc | 0.03% | 505,762 | $107,196,222 | $127,360,987 | +$20,164,765 | +18.81% | |
| Woodline Partners Lp | 0.32% | 485,841 | $102,974,000 | $122,344,481 | +$19,370,481 | +18.81% | |
| Fiduciary Management Inc | 1.46% | 483,557 | $102,489,906 | $121,769,324 | +$19,279,418 | +18.81% | |
| Crawford Investment Counsel Inc | 1.62% | 460,081 | $97,514,204 | $115,857,597 | +$18,343,393 | +18.81% | |
| Barclays Plc | 0.03% | 448,726 | $95,107,474 | $112,998,181 | +$17,890,707 | +18.81% | |
| Envestnet Asset Management Inc | 0.02% | 428,564 | $90,834,224 | $107,920,986 | +$17,086,762 | +18.81% | |
| Schroder Investment Management Group | 0.06% | 417,715 | $88,822,918 | $105,188,991 | +$16,366,073 | +18.43% | |
| Mackenzie Financial Corp | 0.09% | 365,671 | $85,226,940 | $92,083,271 | +$6,856,331 | +8.04% | |
| Bnp Paribas Financial Markets | 0.04% | 395,245 | $83,772,178 | $99,530,596 | +$15,758,418 | +18.81% | |
| Pacer Advisors, Inc. | 0.21% | 381,995 | $80,964,000 | $96,193,981 | +$15,229,981 | +18.81% | |
| Artemis Investment Management Llp | 0.68% | 334,585 | $77,981,726 | $84,255,195 | +$6,273,469 | +8.04% | |
| M.D. Sass, Llc | 5.06% | 360,453 | $76,397,960 | $90,769,274 | +$14,371,314 | +18.81% | |
| Acadian Asset Management Llc | 0.09% | 346,489 | $73,419,000 | $87,252,860 | +$13,833,860 | +18.84% | |
| Qube Research & Technologies Ltd | 0.08% | 343,398 | $72,783,206 | $86,474,484 | +$13,691,278 | +18.81% | |
| Advisors Capital Management, Llc | 0.74% | 327,575 | $69,429,626 | $82,489,937 | +$13,060,311 | +18.81% | |
| Citigroup Inc | 0.03% | 315,584 | $66,888,058 | $79,470,363 | +$12,582,305 | +18.81% |
Frequently asked questions about DGX
Who are the largest institutional holders of DGX?
The largest institutional holders of DGX reported in the latest SEC Form 13F filings include Blackrock, Inc., Vanguard Capital Management Llc, Vanguard Portfolio Management Llc, State Street Corp, and Price T Rowe Associates Inc. InsiderSet ranks institutional holders by their latest reported DGX position.
What is DGX institutional ownership?
This page tracks DGX positions reported by institutional investment managers through SEC Form 13F. QUEST DIAGNOSTICS INC (DGX) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own DGX?
InsiderSet currently tracks 1,107 institutional managers reporting DGX holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of DGX shareholders.
How much DGX stock do institutions own?
Institutional investment managers disclosed approximately $21.86B in DGX holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was DGX institutional ownership last updated?
The latest DGX institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional DGX holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its DGX position after the reporting date.
Are institutions buying or selling DGX?
Institutional buying and selling can be analyzed by comparing DGX positions across consecutive 13F reporting periods. InsiderSet's DGX Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View DGX ownership changes.
How has DGX institutional ownership changed over time?
InsiderSet tracks DGX institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.