LYTIR

Company · DGX

Quest Diagnostics Incorporated

Name as listed on its exchange; filed with the SEC as QUEST DIAGNOSTICS INC.

Nasdaq's symbol directory lists DGX on the New York Stock Exchange as “Quest Diagnostics Incorporated Common Stock”.

In the 12 months to Nov 8, 2026: insiders sold on 6 occasions ($15.7M); 5 planned-sale notices; 1 filing by holders of 5% or more; 2 congressional trade disclosures; 4 company reports (Form 8-K, since May 26, 2026).

All insider filings at the SEC

Insider purchases and sales, by month (last 12 months)Insider purchases: $0 in total; Insider sales: $15.7M in total.Jun: Insider sales $1.6MJul: Insider sales $376KAug: Insider sales $5.5MSep: Insider sales $2.4MOct: Insider sales $292KNov: Insider sales $5.5MDecJanFebMarAprMayJunJulAugSepOctNov
Insider purchases above the line: $0Insider sales below: $15.7M
Dollar value of open-market purchases and sales reported on SEC Form 4, by the month traded. Sales include pre-arranged 10b5-1 plan sales.

Insider trades · SEC Form 4

Those inside the hall

Open-market purchases and sales only. Legs one person filed for one day are combined.

Who traded

  1. Michael E. Prevoznik, SVP & General Counsel sold on 1 day all under a 10b5-1 plan latest Aug 28, 2026 sold $5.5M
  2. Catherine T. Doherty, Executive Vice President sold on 1 day all under a 10b5-1 plan latest Nov 3, 2026 sold $5.5M
  3. James E. Davis, CEO and President sold on 1 day all under a 10b5-1 plan latest Sep 1, 2026 sold $2.4M
  4. Karthik Kuppusamy, SVP, Clinical Solutions sold on 1 day all under a 10b5-1 plan latest Jun 4, 2026 sold $1.6M
  5. DELANEY MARK E, SVP & Chief Commercial Officer sold on 1 day all under a 10b5-1 plan latest Jul 28, 2026 sold $376K
  6. PFEIFFER GARY M sold on 1 day all under a 10b5-1 plan latest Oct 26, 2026 sold $292K
Every trade (6)
  1. SELLCatherine T. Doherty, Executive Vice President sold Nov 3, 2026 22,105 shares 7 legs combined 10b5-1 plan (scheduled) filing $5.5M
  2. SELLPFEIFFER GARY M sold Oct 26, 2026 1,203 shares 10b5-1 plan (scheduled) filing $292K
  3. SELLJames E. Davis, CEO and President sold Sep 1, 2026 10,000 shares 10b5-1 plan (scheduled) filing $2.4M
  4. SELLMichael E. Prevoznik, SVP & General Counsel sold Aug 28, 2026 22,677 shares 3 legs combined 10b5-1 plan (scheduled) filing $5.5M
  5. SELLDELANEY MARK E, SVP & Chief Commercial Officer sold Jul 28, 2026 1,600 shares 10b5-1 plan (scheduled) filing $376K
  6. SELLKarthik Kuppusamy, SVP, Clinical Solutions sold Jun 4, 2026 8,147 shares 10b5-1 plan (scheduled) filing $1.6M

Planned sales · SEC Form 144

Notice given

A Form 144 is filed before an insider sells restricted stock. It states an intent; the sale, if it happens, appears later on a Form 4. Every recent notice

  1. Doherty Catherine T. filed Nov 3, 2026 Officer 22,105 shares planned sale date 11/03/2026 filing $5.6M
  2. PFEIFFER GARY M filed Oct 26, 2026 Director 1,203 shares planned sale date 10/26/2026 filing $292K
  3. Davis J. E. filed Sep 1, 2026 Officer 10,000 shares planned sale date 09/01/2026 filing $2.4M
  4. PREVOZNIK MICHAEL E filed Aug 28, 2026 Officer 22,677 shares planned sale date 08/28/2026 filing $5.5M
  5. DELANEY MARK E filed Jul 28, 2026 Officer 1,600 shares planned sale date 07/28/2026 filing $376K

Large holders · SEC Schedules 13D and 13G

Five percent and over

Anyone who comes to hold more than 5% of a company's voting shares must tell the SEC. A Schedule 13D is filed by a holder who may seek to influence the company; a 13G by one who states it is a passive investor. An amendment updates an earlier filing, and a stake reported as 0% means the holder says it has sold all, or nearly all, of its shares. Every recent 13D and 13G

  1. T. Rowe Price Associates, Inc. filed Aug 14, 2026 Schedule 13G/A passive 5,428,244 shares filing 4.9%

Congress · STOCK Act

The Althing

Periodic transaction reports. Amounts are the ranges members report; the trade date is when it happened, the report can come up to 45 days later.

  1. Alan Armstrong (R-OK): Purchase Mar 30, 2026 reported Jul 21, 2026 one of 703 trades the member reported that day Senate Stock $1,001 - $15,000
  2. Alan Armstrong (R-OK): Purchase Mar 27, 2026 reported Jul 21, 2026 one of 703 trades the member reported that day Senate Stock $1,001 - $15,000

Company reports · SEC Form 8-K

In its own words

Current reports the company filed with the SEC; most items are due within four business days of the event. Each line lists the report's items by the SEC's own titles; the filing says what happened. Reports collected since May 26, 2026; every 8-K at the SEC.

  1. Results of operations and financial condition filing Oct 22, 2026
  2. Other events filing Oct 22, 2026
  3. Departure or appointment of directors or officers filing Oct 6, 2026
  4. Results of operations and financial condition filing Jul 23, 2026

Sources: SEC EDGAR (Forms 4, 144 and 8-K) and STOCK Act periodic transaction reports. Filings can be late, amended or wrong at the source; see methodology.