Quest Diagnostics Ownership | Who Owns Quest Diagnostics?
Quest Diagnostics Ownership Summary
Quest Diagnostics is owned by 22.97% institutional investors, 0.40% insiders, and 76.64% retail investors. Vanguard group is the largest institutional shareholder, holding 12.85% of DGX shares. Vanguard Total Stock Mkt Idx Inv 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 | 22.97% | 0.40% | 76.64% |
| Sector | Healthcare Stocks | 231.98% | 10.74% | -142.72% |
| Industry | Diagnostics & Research Stocks | 35.38% | 11.00% | 53.62% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Vanguard group | 14.39M | 12.85% | $2.50B |
| Blackrock | 10.06M | 9.06% | $1.38B |
| Blackrock funding, inc. /de | 9.46M | 8.52% | $1.64B |
| Price t rowe associates inc /md/ | 7.01M | 6.26% | $1.34B |
| State street | 5.22M | 4.66% | $995.58M |
| Jpmorgan chase | 4.15M | 3.70% | $719.44M |
| Boston partners | 4.04M | 3.60% | $767.98M |
| Geode capital management | 3.03M | 2.73% | $523.52M |
| Morgan stanley | 2.69M | 2.43% | $467.42M |
| Victory capital management | 2.34M | 2.09% | $446.71M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Ivy lane capital management | 29.00K | 6.18% | $5.53M |
| Paradiem | 78.67K | 3.27% | $13.65M |
| Artia global partners lp | 81.72K | 2.47% | $15.57M |
| Sgl investment advisors | 28.50K | 2.19% | $5.48M |
| Coho partners | 89.10K | 2.18% | $16.98M |
| Fiduciary management inc /wi/ | 1.05M | 2.00% | $181.67M |
| Naples money management | 16.70K | 1.95% | $2.29M |
| Delta capital management | 17.71K | 1.73% | $3.07M |
| Atwater malick | 35.33K | 1.69% | $6.13M |
| Persistent asset partners | 12.08K | 1.58% | $2.30M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Norges bank | 1.32M | 0.02% | 1.32M |
| Boston partners | 4.04M | 0.79% | 997.03K |
| Edgepoint investment group | 849.75K | 1.21% | 848.48K |
| Goldman sachs group | 1.71M | 0.04% | 644.95K |
| Millennium management | 653.77K | 0.05% | 491.46K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Blackrock | 10.06M | 0.03% | -641.17K |
| Alliancebernstein | 634.77K | 0.04% | -607.08K |
| Blackrock funding, inc. /de | 9.46M | 0.03% | -542.82K |
| Victory capital management | 2.34M | 0.26% | -465.25K |
| Pacer advisors | - | - | -450.90K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Norges bank | 1.32M | 0.02% | 1.32M | $229.52M |
| Conning | 173.26K | 1.01% | 173.26K | $30.07M |
| Foundry partners | 108.32K | 0.82% | 108.32K | $16.34M |
| Paradiem | 78.67K | 3.27% | 78.67K | $13.65M |
| International assets investment management | 55.23K | 0.01% | 55.23K | $91.63K |
Sold Out
| Holder | Change |
|---|---|
| Kozak & associates | -1.00 |
| Halbert hargrove global advisors | -1.00 |
| Greenline partners | -1.00 |
| Davis capital management | -1.00 |
| Palisade asset management | -2.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Dec 31, 2025 | 472 | -53.63% | 25,722,396 | -75.45% | 22 | 0.26% | 211 | -55.67% | 151 | -55.46% |
| 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% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| Vanguard Total Stock Mkt Idx Inv | 3.50M | 3.17% | 7.34K |
| Vanguard US Total Market Shares ETF | 3.51M | 3.17% | 2.60K |
| Vanguard Institutional 500 Index Trust | 3.16M | 2.83% | 19.87K |
| Vanguard 500 Index Investor | 2.83M | 2.57% | 17.76K |
| Vanguard Mid Cap Index Institutional | 2.41M | 2.19% | -12.37K |
| Sycamore Mid Cap Value Comp | 2.18M | 1.95% | 2.10M |
| T. Rowe Price U.S. Large-Cap Core Tr-B | 1.57M | 1.41% | 47.37K |
| Victory Sycamore Established Value R | 1.46M | 1.32% | -155.00K |
| iShares Core S&P 500 ETF | 1.42M | 1.29% | 263.58K |
| Fidelity 500 Index | 1.41M | 1.28% | -5.43K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Mar 03, 2026 | Doherty Catherine T. | EVP, Regional Businesses | Sell | $131.29K |
| Mar 03, 2026 | PREVOZNIK MICHAEL E | SVP & General Counsel | Sell | $109.27K |
| Mar 02, 2026 | Davis J. E. | CEO and President | Sell | $2.13M |
| Mar 03, 2026 | Plewman Patrick | SVP for Diagnostic Services | Sell | $85.17K |
| Feb 19, 2026 | Plewman Patrick | SVP for Diagnostic Services | Sell | $196.23K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2026 Q1 | - | 13 |
| 2025 Q4 | - | 6 |
| 2025 Q3 | - | 11 |
| 2025 Q2 | - | 18 |
| 2025 Q1 | - | 12 |
DGX Ownership FAQ
Try Tickergate Pro Free
Customize Everything. 100% Flexibility. Fast and Easy to Use (No code or Excel Needed)
Customize your own personal stocks lists, views and charts
Choose from hundreds of fields, up to 15 years of history
Conduct deep comparison analysis
Discover trending investment themes
Find your next best investment
Research stocks using tools