Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
1,031 institutional managers reported holding DGX for the quarter ended Mar 31, 2026. Together they hold about 88% of shares outstanding; the top 10 hold 45%. 111 opened new positions; 108 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Vanguard Group | 14.39M | 12.85% | $2.82B | unchanged | ≤2013 |
| BlackRock | 9.17M | 8.19% | $1.80B | trimmed -3% | ≤2013 |
| T. Rowe Price | 6.30M | 5.62% | $1.23B | unchanged | ≤2013 |
| State Street | 5.38M | 4.80% | $1.05B | unchanged | ≤2013 |
| Boston Partners | 4.01M | 3.58% | $786.5M | added +2.5% | 2025 Q1 |
| Geode Capital | 3.09M | 2.76% | $605.0M | added +1.9% | ≤2013 |
| Morgan Stanley | 2.48M | 2.21% | $486.1M | trimmed -7.9% | ≤2013 |
| EdgePoint Investment Group INC. (focused) | 2.24M | 2.00% | $439.8M | added +35.1% | 2025 Q2 |
| Dimensional Fund Advisors | 1.95M | 1.74% | $382.1M | added +0.9% | ≤2013 |
| Grantham, Mayo, Van Otterloo & CO. LLC | 1.88M | 1.68% | $369.1M | added +3.7% | 2020 Q1 |
| Victory Capital Management INC | 1.85M | 1.65% | $361.9M | trimmed -13.2% | 2015 Q2 |
| Wells Fargo & COMPANY/MN | 1.76M | 1.57% | $345.5M | unchanged | ≤2013 |
| Bank OF America CORP /DE/ | 1.75M | 1.56% | $343.6M | added +8% | ≤2013 |
| Invesco | 1.64M | 1.46% | $321.2M | trimmed -1.7% | ≤2013 |
| Davis Selected Advisers | 1.62M | 1.44% | $317.1M | added +1.8% | 2014 Q1 |
| UBS | 1.55M | 1.38% | $303.6M | trimmed -21% | ≤2013 |
| Goldman Sachs | 1.35M | 1.20% | $264.4M | trimmed -21.1% | ≤2013 |
| Northern Trust | 1.11M | 0.99% | $218.4M | added +3.3% | ≤2013 |
| FMR (Fidelity) | 942.2k | 0.84% | $184.7M | trimmed -21.6% | ≤2013 |
| American Century Companies INC | 867.3k | 0.77% | $170.0M | unchanged | ≤2013 |
| Ameriprise Financial INC | 807.5k | 0.72% | $158.3M | trimmed -0.7% | ≤2013 |
| M&G PLC | 805.3k | 0.72% | $157.9M | trimmed -14.8% | 2019 Q4 |
| Charles Schwab Investment Management | 760.8k | 0.68% | $149.1M | added +1.3% | ≤2013 |
| DekaBank Deutsche Girozentrale | 748.7k | 0.67% | $146.8M | unchanged | ≤2013 |
| Legal & General Group PLC | 736.6k | 0.66% | $144.4M | trimmed -0.9% | ≤2013 |
| Qube Research & Technologies LTD | 734.7k | 0.66% | $144.0M | unchanged | 2023 Q1 |
| Fiduciary Management INC /WI/ | 721.0k | 0.64% | $141.3M | trimmed -31.1% | 2024 Q1 |
| AllianceBernstein | 681.2k | 0.61% | $133.5M | added +7.7% | ≤2013 |
| BNY Mellon | 656.0k | 0.59% | $128.6M | trimmed -2.2% | ≤2013 |
| Woodline Partners LP | 593.7k | 0.53% | $116.4M | added +73.9% | 2024 Q1 |
| Barclays PLC | 565.5k | 0.51% | $110.8M | added +69.7% | ≤2013 |
| Deutsche Bank AG\ | 550.9k | 0.49% | $108.0M | trimmed -9.6% | ≤2013 |
| Principal Financial Group INC | 534.4k | 0.48% | $104.8M | unchanged | ≤2013 |
| BNP Paribas Financial Markets | 501.2k | 0.45% | $98.2M | added +10.6% | ≤2013 |
| Crawford Investment Counsel INC | 486.4k | 0.43% | $95.4M | trimmed -2% | 2024 Q1 |
| Nuveen | 465.4k | 0.42% | $91.2M | added +39.3% | 2016 Q4 |
| Raymond James Financial INC | 458.5k | 0.41% | $89.9M | trimmed -1% | 2013 Q3 |
| Artemis Investment Management LLP | 447.3k | 0.40% | $87.7M | trimmed -2.9% | 2025 Q2 |
| Envestnet Asset Management INC | 412.4k | 0.37% | $80.8M | added +23.6% | ≤2013 |
| Amundi | 408.3k | 0.36% | $80.0M | trimmed -12% | 2017 Q4 |
| Citadel Advisors | 347.2k | 0.31% | $68.1M | trimmed -18.3% | 2017 Q2 |
| Squarepoint Ops LLC | 345.8k | 0.31% | $67.8M | trimmed -38.9% | 2017 Q2 |
| First Trust Advisors LP | 329.2k | 0.29% | $64.5M | trimmed -6.4% | ≤2013 |
| Mitsubishi UFJ Asset Management CO., LTD. | 327.9k | 0.29% | $64.3M | added +5.8% | ≤2013 |
| Advisors Capital Management, LLC | 327.3k | 0.29% | $64.1M | added +4.3% | 2017 Q1 |
| Swiss National Bank | 326.5k | 0.29% | $64.0M | added +6.5% | ≤2013 |
| Canada Life Assurance CO | 305.7k | 0.27% | $59.9M | trimmed -4.3% | ≤2013 |
| M.d. Sass, LLC (focused) | 299.5k | 0.27% | $58.7M | opened | 2026 Q1 |
| Schroder Investment Management Group | 295.0k | 0.26% | $57.8M | added +14.6% | ≤2013 |
| Citigroup INC | 287.1k | 0.26% | $56.3M | trimmed -7.3% | ≤2013 |
Largest 50 of 1,031 shown; the full ranked, searchable register is at boothcheck.com/holders/DGX. Related filers are grouped using the filings' own included-manager declarations. Historically, several managers opening new positions in the same quarter said almost nothing about the quarter that followed (59,118 cases since 2013). A filed record, not a forecast. Nothing here is investment advice.