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Q

Quest Diagnostics DGX · USD

Health Care · Health Care Providers & Services · US listing · 🇺🇸 United States

S&P 500

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259.67

+1.58%

Close of 9 Nov 2026, in USD

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Reference data, closing prices and charts across 45,000 companies, plus crypto, commodities and currencies.

Largest shareholders

As filed, so dates differ, and a group and its funds can both appear.

HolderSharesStakeChangeFiled
BLACKROCK, INC.9.2m8.12%−286.9k31 Mar 2026
VANGUARD CAPITAL MANAGEMENT LLC7.1m6.32%+7.1m31 Mar 2026
PRICE T ROWE ASSOCIATES INC /MD/6.3m5.57%+83031 Mar 2026
VANGUARD PORTFOLIO MANAGEMENT LLC6.1m5.38%+6.1m31 Mar 2026
STATE STREET CORP5.4m4.76%−1.7k31 Mar 2026
BOSTON PARTNERS4m3.55%+98.9k31 Mar 2026
JPMORGAN CHASE & CO3.8m3.40%−299.4k31 Mar 2026
GEODE CAPITAL MANAGEMENT, LLC3.1m2.73%+58.1k31 Mar 2026
MORGAN STANLEY2.5m2.19%−213.8k31 Mar 2026
EDGEPOINT INVESTMENT GROUP INC.2.2m1.99%+582.8k31 Mar 2026
DIMENSIONAL FUND ADVISORS LP1.9m1.73%+18k31 Mar 2026
GRANTHAM, MAYO, VAN OTTERLOO & CO. LLC1.9m1.67%+67k31 Mar 2026
VICTORY CAPITAL MANAGEMENT INC1.8m1.63%−280.1k31 Mar 2026
WELLS FARGO & COMPANY/MN1.8m1.56%−6.3k31 Mar 2026
BANK OF AMERICA CORP /DE/1.8m1.55%+130k31 Mar 2026

Insider trades

Purchases and sales by directors and officers, as filed with the regulator

DateWhoTypeSharesPriceValue
5 Mar 2026 ↗Doherty Catherine T.EVP, Regional BusinessesSale5.6k206.21$1.1m
5 Mar 2026 ↗Plewman PatrickSVP for Diagnostic ServicesSale2.9k206.21$588,730
5 Mar 2026 ↗PREVOZNIK MICHAEL ESVP & General CounselSale3.9k206.21$799,682
4 Mar 2026 ↗KUPPUSAMY KARTHIKSVP, Clinical SolutionsSale2.6k204.86$538,372
3 Mar 2026 ↗PREVOZNIK MICHAEL ESVP & General CounselSale526207.73$109,266
3 Mar 2026 ↗Doherty Catherine T.EVP, Regional BusinessesSale632207.73$131,285
3 Mar 2026 ↗Plewman PatrickSVP for Diagnostic ServicesSale410207.73$85,169
2 Mar 2026 ↗Davis J. E.CEO and PresidentSale10k212.52$2.1m

Short interest

Shares sold short, 15 Oct 2026. US exchange data.

3.6m

+4.6% on the period before. 3.4 days to cover.

Short volume

Share of the day's trading sold short, 4 Nov 2026

55.1%

Last 60 trading days.

Failed deliveries

Shares not delivered on settlement, from the SEC

  • 23 Sept 20261,056 shares
  • 21 Sept 20262,262 shares
  • 10 Sept 202613 shares
  • 28 Aug 202628 shares
  • 25 Aug 202653 shares

Sources and methodology

Data on this tab
Our data supplier
Chart on the Overview
TradingView

Nothing here is investment advice. Prices can be delayed or wrong, so check with the exchange before relying on them. Data for this page. How we cover markets.