Quest Diagnostics Incorporated (DGX) ownership: insiders 1% · institutions 95% (13F 2026-03-31). Insider activity, 90 days: Routine (3 sales, 0 open-market buys). 10 recent congressional STOCK Act disclosures. SEC EDGAR first-party data.
| Holder | Shares | Market Value | % Outstanding | Reported |
|---|---|---|---|---|
| Vanguard | 14388775.00 | $2.82B | 13.0% | 2026-03-31 |
| BlackRock | 9172292.00 | $1.80B | 8.3% | 2026-03-31 |
| State Street | 5380821.00 | $1.05B | 4.9% | 2026-03-31 |
| Boston Partners | 4012232.00 | $786.65M | 3.6% | 2026-03-31 |
| JPMorgan | 3846456.00 | $758.37M | 3.5% | 2026-03-31 |
| Geode Capital Management | 3086308.00 | $602.66M | 2.8% | 2026-03-31 |
| Morgan Stanley | 2479720.00 | $485.98M | 2.2% | 2026-03-31 |
| EdgePoint Investment Group Inc. | 2243869.00 | $439.75M | 2.0% | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-07-28 | |
| Sell | null | 2026-07-22 | |
| Sell | null | 2026-07-22 | |
| Sell | null | 2026-07-22 | |
| Sell | null | 2026-07-22 | |
| Sell | null | 2026-07-22 | |
| Sell | null | 2026-07-22 | |
| Sell | null | 2026-07-22 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.