Quest Diagnostics Inc. (DGX) Ownership & Trading Activity
Institutional holders, insider transactions, and congressional trades for DGX. 13F holdings as of 2026-06-30.
In 13F filings for the quarter ended June 30, 2026, 1,082 institutions reported holding DGX, with 104.3 million shares worth $22.1 billion in aggregate.
Top Institutional Holders
| Institution | Shares | Value | Change |
|---|---|---|---|
| Vanguard | 14,553,517 | $3.1B | INCREASED |
| BlackRock | 9,275,411 | $2.0B | INCREASED |
| State Street | 5,516,643 | $1.2B | INCREASED |
| T. Rowe Price | 5,444,986 | $1.2B | DECREASED |
| Boston Partners | 4,744,473 | $1.0B | INCREASED |
Recent Insider Trades
| Insider | Type | Shares | Value | Date |
|---|---|---|---|---|
| Gary M Pfeiffer (Director) | SELL | 1,203 | $292K | 2026-10-26 |
| Mark E Delaney (SVP & Chief Commercial Officer) | OTHER | 25 | $6K | 2026-10-21 |
| Timothy L Main (Director) | OTHER | 18 | $4K | 2026-10-21 |
| Patrick Plewman (SVP for Diagnostic Services) | OTHER | 41 | $10K | 2026-10-21 |
| Wright Lassiter III (Director) | OTHER | 6 | $1K | 2026-10-21 |
Recent Congressional Trades
| Member | Type | Amount | Date |
|---|---|---|---|
| Ro Khanna (Democrat) | PURCHASE | $1,001 - $15,000 | 2026-09-04 |
| Carol D. Miller (Republican) | SALE | $15,001 - $50,000 | 2025-03-10 |
| Carol D. Miller (Republican) | SALE | $15,001 - $50,000 | 2025-03-09 |
Full institutional holdings, insider history, and congressional trades for Quest Diagnostics Inc. on SentiSense.