QUEST DIAGNOSTICS INC
NYSE · Services-Medical Laboratories
Company Overview
A concise company profile alongside the latest public filing activity.
Quest Diagnostics operates clinical laboratories that perform diagnostic testing services, including routine blood work, genetic testing, pathology, and drug testing, for patients, physicians, hospitals, and employers across the United States.
Company profile sourced from SEC filings.
Corporate Insider Trades
Open-market purchases and sales by directors, officers, and other company insiders.
| Insider | Type | Value | Shares / Price | Date |
|---|---|---|---|---|
| Doherty Catherine T.Executive Vice President | Sell | $284K | 1,151at $246.98 | Nov 3, 2026 |
| Doherty Catherine T.Executive Vice President | Sell | $1.48M | 5,990at $246.26 | Nov 3, 2026 |
| Doherty Catherine T.Executive Vice President | Sell | $937K | 3,818at $245.45 | Nov 3, 2026 |
| Doherty Catherine T.Executive Vice President | Sell | $749K | 3,004at $249.40 | Nov 3, 2026 |
| Doherty Catherine T.Executive Vice President | Sell | $730K | 2,907at $251.24 | Nov 3, 2026 |
| Doherty Catherine T.Executive Vice President | Sell | $721K | 2,877at $250.49 | Nov 3, 2026 |
| Doherty Catherine T.Executive Vice President | Sell | $586K | 2,358at $248.38 | Nov 3, 2026 |
| PFEIFFER GARY MDirector | Sell | $292K | 1,203at $243.00 | Oct 26, 2026 |
Source: SEC EDGAR Form 4 filings
Congressional Trades
Recent disclosures by members of the U.S. House and Senate.
| Member | Chamber | Type | Amount | Date |
|---|---|---|---|---|
| Alan ArmstrongArmstrong, Alan (Senator) | Senate | Buy | $1,001 - $15,000 | Mar 30, 2026 |
| Alan ArmstrongArmstrong, Alan (Senator) | Senate | Buy | $1,001 - $15,000 | Mar 27, 2026 |
| Julie JohnsonTX32 | House | Sell | $1,001 - $15,000 | Oct 30, 2025 |
| Julie JohnsonTX32 | House | Buy | $1,001 - $15,000 | Oct 30, 2025 |
| Carol Devine MillerWV01 | House | Sell | $15,001 - $50,000 | Mar 10, 2025 |
Source: Senate eFD and House Clerk STOCK Act disclosures
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For informational purposes only, not investment advice. Filings can be delayed, corrected, or amended. Trading activity alone does not predict future performance.