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QUEST DIAGNOSTICS INC
Services-Medical Laboratories · DE · CIK 1022079
Provides diagnostic insights from laboratory testing to empower health decisions and improve outcomes
🔥 High media attention
$22.48B
Market cap
$212.64
Last close
+1.3%
1D
+9.8%
5D
786K
Volume
Price · last 39 sessions+11.0%
May 4L $186.61 · H $212.64Jun 29
201
Total filings
Jun 18, 2026
Last filing
12/31
Fiscal year end
8-KShareholder VoteMay 21, 20268-KMaterial AgreementMay 8, 20268-KCompany UpdateMay 1, 20268-KResults of OperationsApr 21, 20268-KExecutive Change · Reg FD DisclosureMar 12, 20268-KResults of Operations · Company UpdateFeb 10, 20268-KResults of Operations · Reg FD DisclosureJan 12, 20268-KResults of OperationsOct 21, 20258-KResults of OperationsJul 22, 20258-KShareholder VoteMay 22, 20258-KResults of OperationsApr 22, 20258-KReg FD DisclosureMar 19, 20258-KReg FD DisclosureMar 19, 20258-KResults of Operations · Company UpdateJan 30, 20258-KResults of OperationsOct 22, 20248-KCompany UpdateAug 29, 20248-KMaterial Agreement · Bylaw AmendmentAug 19, 20248-KResults of OperationsJul 23, 20248-KMaterial Agreement · Reg FD DisclosureJul 3, 20248-KExecutive Change · Reg FD DisclosureMay 21, 20248-KBylaw Amendment · Shareholder VoteMay 21, 20248-KResults of OperationsApr 23, 20248-KResults of Operations · Company UpdateFeb 1, 20248-KMaterial Agreement · Company UpdateNov 1, 20238-KResults of OperationsOct 24, 20238-KExecutive ChangeSep 29, 20238-KResults of OperationsJul 26, 20238-KShareholder VoteMay 19, 20238-KResults of Operations · Reg FD DisclosureApr 27, 20238-KReg FD DisclosureMar 17, 20238-KCompany UpdateMar 7, 20238-KResults of Operations · Company UpdateFeb 2, 20238-KExecutive Change · Bylaw AmendmentNov 18, 20228-KExecutive ChangeNov 1, 20228-KExecutive ChangeOct 28, 20228-KResults of OperationsOct 20, 20228-KResults of OperationsJul 21, 20228-KExecutive Change · Reg FD DisclosureJun 14, 20228-KExecutive ChangeMay 25, 20228-KBylaw AmendmentMay 20, 20228-KShareholder VoteMay 20, 20228-KResults of OperationsApr 21, 20228-KExecutive ChangeMar 2, 20228-KExecutive ChangeMar 1, 20228-KExecutive ChangeFeb 3, 20228-KResults of Operations · Company UpdateFeb 3, 20228-KResults of OperationsJan 12, 20228-KResults of OperationsOct 21, 20218-KCompany UpdateOct 8, 20218-KCompany UpdateSep 9, 20218-KCompany UpdateAug 18, 20218-KExecutive ChangeAug 17, 20218-KResults of OperationsJul 22, 20218-KShareholder VoteMay 25, 20218-KCompany UpdateApr 28, 20218-KResults of OperationsApr 22, 20218-KReg FD DisclosureMar 11, 20218-KExecutive Change · Reg FD DisclosureFeb 23, 20218-KExecutive ChangeFeb 23, 20218-KResults of Operations · Company UpdateFeb 4, 20218-KCompany UpdateDec 16, 20208-KCompany UpdateNov 19, 20208-KResults of Operations · Company UpdateOct 22, 20208-KCompany UpdateSep 10, 20208-KCompany UpdateAug 25, 20208-KResults of OperationsJul 23, 20208-KResults of OperationsJul 13, 20208-KExecutive Change · Reg FD DisclosureJun 24, 20208-KReg FD DisclosureJun 3, 20208-KShareholder VoteMay 21, 20208-KMaterial Agreement · Company UpdateMay 13, 20208-KCompany UpdateMay 4, 20208-KResults of OperationsApr 22, 20208-KReg FD DisclosureApr 13, 20208-KCompany UpdateMar 31, 20208-KExecutive ChangeMar 16, 20208-KResults of OperationsJan 30, 20208-KMaterial Agreement · Company UpdateDec 17, 20198-KCompany UpdateDec 12, 20198-KExecutive ChangeNov 21, 2019
Insider Activity
In the 90 days to Mar 5, 2026: 5 sold $12.8M.
| Date | Insider | Action | Shares | Price | Value |
|---|---|---|---|---|---|
| Mar 5, 2026 | Doherty Catherine T.EVP, Regional Businesses | Sell | 5,558 | $206.21 | $1.1M |
| Mar 5, 2026 | Prevoznik Michael ESVP & General Counsel | Sell | 3,878 | $206.21 | $800K |
| Mar 5, 2026 | Plewman PatrickSVP for Diagnostic Services | Sell | 2,855 | $206.21 | $589K |
| Mar 4, 2026 | Kuppusamy KarthikSVP, Clinical Solutions | Sell | 2,628 | $204.86 | $538K |
| Mar 3, 2026 | Doherty Catherine T.EVP, Regional Businesses | Sell | 632 | $207.73 | $131K |
| Mar 3, 2026 | Prevoznik Michael ESVP & General Counsel | Sell | 526 | $207.73 | $109K |
| Mar 3, 2026 | Plewman PatrickSVP for Diagnostic Services | Sell | 410 | $207.73 | $85K |
| Mar 2, 2026 | Davis J. E.CEO and President | Sell | 10,000 | $212.52 | $2.1M |
| Feb 19, 2026 | Doherty Catherine T.EVP, Regional Businesses | Sell | 1,433 | $204.83 | $294K |
| Feb 19, 2026 | Prevoznik Michael ESVP & General Counsel | Sell | 1,111 | $204.83 | $228K |
| Feb 19, 2026 | Plewman PatrickSVP for Diagnostic Services | Sell | 958 | $204.83 | $196K |
| Feb 13, 2026 | Doherty Catherine T.EVP, Regional Businesses | Sell | 10,573 | $205.21 | $2.2M |
| Feb 13, 2026 | Doherty Catherine T.EVP, Regional Businesses | Sell | 10,122 | $206.37 | $2.1M |
| Feb 13, 2026 | Doherty Catherine T.EVP, Regional Businesses | Sell | 3,500 | $207.08 | $725K |
| Feb 13, 2026 | Doherty Catherine T.EVP, Regional Businesses | Sell | 1,619 | $208.21 | $337K |
| Feb 13, 2026 | Doherty Catherine T.EVP, Regional Businesses | Sell | 351 | $209.10 | $73K |
| Feb 10, 2026 | Plewman PatrickSVP for Diagnostic Services | Sell | 5,662 | $204.00 | $1.2M |
| Nov 25, 2025 | Davis J. E.CEO and President | Sell | 41,004 | $192.27 | $7.9M |
| Nov 25, 2025 | Davis J. E.CEO and President | Sell | 9,342 | $191.59 | $1.8M |
| Nov 25, 2025 | Davis J. E.CEO and President | Sell | 4,747 | $192.97 | $916K |
Open-market buys & sells (Form 4, transaction codes P/S). Source: SEC structured insider data.
In the News
🔥 High media attentionCoverage (30d): 8 reputable articles.
MarketWatchQuest Diagnostics Inc. stock underperforms Friday when compared to competitors despite daily gains3d agoMarketWatchQuest Diagnostics Inc. stock underperforms Thursday when compared to competitors despite daily gains4d agoMarketWatchQuest Diagnostics Inc. stock outperforms competitors on strong trading day5d agoMarketWatchQuest Diagnostics Inc. stock underperforms Thursday when compared to competitors12d agoMarketWatchQuest Diagnostics Inc. stock outperforms competitors despite losses on the day12d ago
Reputable outlets only (Reuters, WSJ, CNBC, Barron's, and peers). More on Google News ↗
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