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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
11-K11-KJun 18, 20268-KShareholder VoteMay 21, 20268-KMaterial AgreementMay 8, 20268-KCompany UpdateMay 1, 202610-Q10-QApr 22, 20268-KResults of OperationsApr 21, 2026DEFA14ADEFA14AApr 6, 2026DEF 14ADEF 14AApr 6, 20268-KExecutive Change · Reg FD DisclosureMar 12, 202610-K10-KFeb 26, 20268-KResults of Operations · Company UpdateFeb 10, 20268-KResults of Operations · Reg FD DisclosureJan 12, 20268-KResults of OperationsOct 21, 202510-Q10-QOct 21, 202510-Q10-QJul 23, 20258-KResults of OperationsJul 22, 202511-K11-KJun 20, 20258-KShareholder VoteMay 22, 202510-Q10-QApr 23, 20258-KResults of OperationsApr 22, 2025DEFA14APROXY STATEMENT PURSUANT TO SECTION 14(A)Apr 11, 2025DEFA14ADEFA14AApr 4, 2025DEF 14ADEF 14AApr 4, 20258-KReg FD DisclosureMar 19, 20258-KReg FD DisclosureMar 19, 202510-K10-KFeb 20, 20258-KResults of Operations · Company UpdateJan 30, 202510-Q10-QOct 23, 20248-KResults of OperationsOct 22, 20248-KCompany UpdateAug 29, 20248-KMaterial Agreement · Bylaw AmendmentAug 19, 202410-Q10-QJul 24, 20248-KResults of OperationsJul 23, 20248-KMaterial Agreement · Reg FD DisclosureJul 3, 202411-K11-KJun 21, 20248-KExecutive Change · Reg FD DisclosureMay 21, 20248-KBylaw Amendment · Shareholder VoteMay 21, 202410-Q10-QApr 24, 20248-KResults of OperationsApr 23, 2024DEFA14ADEFA14AApr 5, 2024DEF 14ADEF 14AApr 5, 202410-K10-KFeb 22, 20248-KResults of Operations · Company UpdateFeb 1, 20248-KMaterial Agreement · Company UpdateNov 1, 202310-Q10-QOct 25, 20238-KResults of OperationsOct 24, 20238-KExecutive ChangeSep 29, 202310-Q10-QJul 27, 20238-KResults of OperationsJul 26, 202311-K11-KJun 22, 20238-KShareholder VoteMay 19, 202310-Q10-QApr 28, 20238-KResults of Operations · Reg FD DisclosureApr 27, 2023DEFA14ADEFA14AApr 6, 2023DEF 14ADEF 14AApr 6, 20238-KReg FD DisclosureMar 17, 20238-KCompany UpdateMar 7, 202310-K10-KFeb 21, 20238-KResults of Operations · Company UpdateFeb 2, 20238-KExecutive Change · Bylaw AmendmentNov 18, 20228-KExecutive ChangeNov 1, 20228-KExecutive ChangeOct 28, 202210-Q10-QOct 21, 20228-KResults of OperationsOct 20, 202210-Q10-QJul 22, 20228-KResults of OperationsJul 21, 20228-K/AExecutive ChangeJul 1, 202211-K11-KJun 23, 20228-KExecutive Change · Reg FD DisclosureJun 14, 20228-KExecutive ChangeMay 25, 20228-KBylaw AmendmentMay 20, 20228-KShareholder VoteMay 20, 202210-Q10-QApr 22, 20228-KResults of OperationsApr 21, 2022DEF 14APRELIMINARY PROXY STATEMENTApr 19, 20228-KExecutive ChangeMar 2, 20228-KExecutive ChangeMar 1, 20228-K/AExecutive ChangeMar 1, 202210-K10-KFeb 28, 2022SC 13GSC 13GFeb 10, 2022
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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