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NYSE: DGX
Quest Diagnostics Inc Stock Ownership - Who owns Quest Diagnostics?

OverviewForecastEarningsRevenueDividendOwnership

Insider buying vs selling

Have Quest Diagnostics Inc insiders been buying or selling?

Buy
Sell
NameRoleDateSharesPriceValue
Gary M. PfeifferDirector2026-10-261,203$243.00
$292.33kSell
Vicky B. GreggDirector2026-10-2163$235.94
$14.86kBuy
Wright Lassiter IiiDirector2026-10-216$235.96
$1.42kBuy
Sam SamadCFO;EVP2026-10-2190$235.94
$21.23kBuy
Karthik KuppusamySVP2026-10-2133$235.94
$7.79kBuy
Mark E. DelaneyCCO;SVP2026-10-2125$235.94
$5.90kBuy
Patrick PlewmanSVP2026-10-2141$235.94
$9.67kBuy
Robert B. CarterDirector2026-10-2110$235.93
$2.36kBuy
Timothy L. MainDirector2026-10-2118$235.94
$4.25kBuy
J. E. DavisCEO;Pres2026-09-0110,000$242.72
$2.43MSell

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Net Insider Buy/Sell (L12M) Ownership

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DGX Shareholders

What type of owners hold Quest Diagnostics Inc stock?

Institutional
Insider
Retail
NameHoldSharesValueType
Stephen H. Rusckowski0.35%389,597$95.69MInsider
Surya N. Mohapatra0.24%259,530$63.75MInsider
Robert Hagemann0.15%164,240$40.34MInsider
J. E. Davis0.11%122,423$30.07MInsider
Mark Guinan0.09%98,981$24.31MInsider
Joan Elizabeth Miller0.09%94,758$23.27MInsider
Catherine T. Doherty0.07%76,082$18.69MInsider
Michael E. Prevoznik0.05%52,845$12.98MInsider
Manner Carrie Eglinton0.04%48,391$11.89MInsider
Wayne R. Simmons0.04%48,335$11.87MInsider

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DGX vs Diagnostic & Research Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
DGX0.10%1.82%Net SellingNet Selling
LH0.10%1.63%Net SellingNet Selling
GH0.10%43.88%Net SellingNet Selling
MTD0.10%5.13%Net BuyingNet Buying
MEDP0.04%99.96%Net SellingNet Selling
View Top Diagnostic & Research Stocks

Quest Diagnostics Stock Ownership FAQ

Who owns Quest Diagnostics?

Quest Diagnostics (NYSE: DGX) is owned by 0.10% institutional shareholders, 1.82% Quest Diagnostics insiders, and 98.09% retail investors. Stephen H. Rusckowski is the largest individual Quest Diagnostics shareholder, owning 389,597.00 shares representing 0.35% of the company. Stephen H. Rusckowski's Quest Diagnostics shares are currently valued at $98.54M.

If you're new to stock investing, here's how to buy Quest Diagnostics stock.
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