Filing Flows › Quest Diagnostics (DGX) › Who owns the stock
Who owns Quest Diagnostics (DGX) stock
1,059 funds reported Quest Diagnostics (DGX) shares in their latest 13F filings, worth $23.2B in all. The largest holder is Vanguard Group ($2.5B). Last quarter 491 funds added to their stakes and 379 cut them. Members of Congress and other officials disclosed 3 trades (2 buys, 1 sales).
Largest holders (13F)
| Fund | Shares | Value | Change | Quarter |
|---|---|---|---|---|
| Vanguard Group | 14,392,082 | $2.5B | increase | 2025-12-31 |
| BlackRock | 9,275,411 | $2.0B | increase | 2026-06-30 |
| Vanguard Capital Management LLC | 7,233,394 | $1.5B | increase | 2026-06-30 |
| Vanguard Portfolio Management LLC | 6,131,045 | $1.3B | increase | 2026-06-30 |
| State Street | 5,516,643 | $1.2B | increase | 2026-06-30 |
| Price T Rowe Associates | 5,444,986 | $1.2B | decrease | 2026-06-30 |
| Boston Partners | 4,744,473 | $1.0B | increase | 2026-06-30 |
| Geode Capital Management, LLC | 3,137,873 | $663M | increase | 2026-06-30 |
| Morgan Stanley | 2,460,497 | $522M | decrease | 2026-06-30 |
| EdgePoint Investment Group | 2,247,568 | $476M | increase | 2026-06-30 |
| Dimensional Fund Advisors LP | 1,988,048 | $421M | increase | 2026-06-30 |
| Bank of America | 1,935,133 | $410M | increase | 2026-06-30 |
| Grantham, Mayo, Van Otterloo & Co. LLC | 1,888,207 | $400M | increase | 2026-06-30 |
| Wells Fargo | 1,751,220 | $371M | decrease | 2026-06-30 |
| Davis Selected Advisers | 1,555,612 | $330M | decrease | 2026-06-30 |
Trades by Congress and other officials
| Date | Who | Trade | Amount |
|---|---|---|---|
| 2026-03-30 | Alan Armstrong | purchase | $1K–$15K |
| 2026-03-27 | Alan Armstrong | purchase | $1K–$15K |
| 2025-11-03 | Julie Johnson | sale | $1K–$15K |
Quest Diagnostics' latest quarter
Quest Diagnostics, Q3 2026: revenue $3.1B (+10% year over year), operating margin 15.5%, net earnings $312M, operating cash flow $611M. The chart follows the revenue to costs, profit and cash.
Questions
Who owns the most DGX stock?
By the latest 13F filings: Vanguard Group ($2.5B); BlackRock ($2.0B); Vanguard Capital Management LLC ($1.5B); Vanguard Portfolio Management LLC ($1.3B); State Street ($1.2B).
Has Congress traded DGX stock?
Officials disclosed 3 trades on file: 2 buys and 1 sales. The latest: Alan Armstrong, purchase on 2026-03-30.
What is the short interest in DGX?
3,573,902 shares were sold short at the 2026-10-15 settlement, 4.57% of the float.
Updated Nov 8, 2026. Read automatically from SEC filings and public data; errors are possible. Not investment advice.