Quest Diagnostics Ownership | Who Owns Quest Diagnostics?
Quest Diagnostics Ownership Summary
Quest Diagnostics is owned by 28.51% institutional investors, 0.40% insiders, and 71.09% retail investors. Vanguard group is the largest institutional shareholder, holding 12.72% of DGX shares. Vanguard US Total Market Shares ETF is the top mutual fund, with 3.17% of its assets in Quest Diagnostics shares.
DGX Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Quest Diagnostics | 28.51% | 0.40% | 71.09% |
| Sector | Healthcare Stocks | 42.50% | 10.81% | 46.69% |
| Industry | Diagnostics & Research Stocks | 45.39% | 10.59% | 44.03% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Vanguard group | 14.25M | 12.72% | $2.72B |
| Blackrock | 10.06M | 9.06% | $1.38B |
| Blackrock funding, inc. /de | 10.00M | 8.93% | $1.91B |
| Price t rowe associates inc /md/ | 7.01M | 6.26% | $1.34B |
| State street | 5.22M | 4.66% | $995.58M |
| Jpmorgan chase | 4.32M | 3.85% | $822.81M |
| Boston partners | 4.04M | 3.60% | $767.98M |
| Geode capital management | 3.04M | 2.71% | $576.44M |
| Victory capital management | 2.34M | 2.09% | $446.71M |
| Morgan stanley | 2.29M | 2.04% | $435.84M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Ivy lane capital management | 29.00K | 6.18% | $5.53M |
| 8 knots management | 275.34K | 5.94% | $52.48M |
| Artia global partners lp | 81.72K | 2.47% | $15.57M |
| Atwater malick | 42.94K | 2.38% | $8.18M |
| Fiduciary management inc /wi/ | 1.15M | 2.21% | $218.70M |
| Coho partners | 89.10K | 2.18% | $16.98M |
| Sgl investment advisors | 28.05K | 2.09% | $5.02M |
| Delta capital management | 20.31K | 2.00% | $3.87M |
| Naples money management | 16.70K | 1.95% | $2.29M |
| Jgp wealth management | 82.22K | 1.65% | $14.88M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Norges bank | 1.27M | 0.03% | 1.27M |
| Boston partners | 4.04M | 0.79% | 997.03K |
| Edgepoint investment group | 849.75K | 1.21% | 848.48K |
| Millennium management | 653.77K | 0.05% | 491.46K |
| Pacer advisors | 450.90K | 0.22% | 433.76K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Blackrock | 10.06M | 0.03% | -641.17K |
| Alliancebernstein | 634.77K | 0.04% | -607.08K |
| Victory capital management | 2.34M | 0.26% | -465.25K |
| Royal bank of canada | 472.23K | 0.01% | -415.90K |
| Ubs asset management americas | 901.61K | 0.04% | -314.89K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Norges bank | 1.27M | 0.03% | 1.27M | $191.82M |
| Foundry partners | 108.32K | 0.82% | 108.32K | $16.34M |
| First national bank of omaha | 46.33K | 0.56% | 46.33K | $8.83M |
| Point72 (difc) | 35.40K | 0.44% | 35.40K | $6.75M |
| Thompson siegel & walmsley | 32.66K | 0.10% | 32.66K | $6.22M |
Sold Out
| Holder | Change |
|---|---|
| Halbert hargrove global advisors | -1.00 |
| Kozak & associates | -1.00 |
| Greenline partners | -1.00 |
| Crewe advisors | -2.00 |
| Macroview investment management | -2.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Sep 30, 2025 | 586 | -41.05% | 31,931,869 | -68.94% | 28 | 0.34% | 279 | -41.39% | 172 | -46.58% |
| Jun 30, 2025 | 979 | 0.31% | 107,047,417 | 5.20% | 95 | 1.14% | 471 | 3.29% | 320 | -3.32% |
| Mar 31, 2025 | 963 | 6.41% | 101,224,949 | 2.29% | 91 | 1.15% | 452 | 5.12% | 328 | 10.07% |
| Dec 31, 2024 | 877 | 2.10% | 98,448,593 | 2.51% | 88 | 1.21% | 416 | 9.19% | 286 | -6.23% |
| Sep 30, 2024 | 848 | - | 95,876,144 | -1.23% | 85 | 1.12% | 379 | 5.57% | 300 | 0.33% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| Vanguard US Total Market Shares ETF | 3.51M | 3.17% | 2.60K |
| Vanguard Total Stock Mkt Idx Inv | 3.51M | 3.14% | -81.01K |
| Vanguard Institutional 500 Index Trust | 3.16M | 2.83% | 19.87K |
| Vanguard 500 Index Investor | 2.76M | 2.47% | -404.70K |
| Vanguard Mid Cap Index Institutional | 2.49M | 2.23% | 26.89K |
| Sycamore Mid Cap Value Comp | 2.18M | 1.95% | 2.10M |
| Victory Sycamore Established Value R | 1.90M | 1.70% | -280.00K |
| T. Rowe Price U.S. Large-Cap Core Tr-B | 1.57M | 1.41% | 47.37K |
| Fidelity 500 Index | 1.42M | 1.27% | 605.00 |
| SPDR® S&P 500 ETF | 1.38M | 1.24% | -29.12K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Nov 25, 2025 | Davis J. E. | CEO and President | Sell | $916.04K |
| Nov 25, 2025 | Davis J. E. | CEO and President | Sell | $1.79M |
| Nov 25, 2025 | Davis J. E. | CEO and President | Sell | $7.88M |
| Nov 25, 2025 | Gregg Vicky B | - | Sell | $239.70K |
| Nov 18, 2025 | DELANEY MARK E | SVP & Chief Commercial Officer | Sell | $1.49M |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2025 Q4 | - | 2 |
| 2025 Q3 | - | 11 |
| 2025 Q2 | - | 18 |
| 2025 Q1 | - | 12 |
| 2024 Q4 | - | 11 |
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