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Quest Diagnostics Inc

DGX
Exchange
NYSE
Industry
Services-Medical Laboratories
SEC CIK
0001022079

In the last 90 days, Quest Diagnostics Inc insiders filed 0 open-market purchases and 3 sales; 1,112 institutions reported holding it in 13F filings for Q2 2026, worth $22.2B in total; no superinvestor holds it.

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by Quest Diagnostics Inc insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
0 filings
Open-market sells
3 filings
3 insiders, $8.32M in total
Insiders trading
3
Net value
−$8.32M
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for Quest Diagnostics Inc, current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for Quest Diagnostics Inc
NameTitleLast reported holdingLast filingFilings, past year
Davis J. E.CEO and President122,423Sep 3, 20267
Prevoznik Michael ESVP & General Counsel36,557Aug 31, 20265
Delaney Mark ESVP & Chief Commercial Officer10,335Jul 29, 20268
Kuppusamy KarthikSVP, Clinical Solutions13,557Jul 27, 20267
Carter Robert BDirector3,864Jul 27, 20265
Gregg Vicky BDirector18,386Jul 27, 20266
Plewman PatrickSVP for Diagnostic Services15,293Jul 27, 20267
Main Timothy LDirector22,460Jul 27, 20262
Samad SamExecutive Vice President & CFO33,478Jul 27, 20266
Lassiter Wright IIIDirector10,323Jul 27, 20265
Wentworth Timothy CDirector1,358Jul 2, 20264
Pfeiffer Gary MDirector31,005May 21, 20262
Ring Timothy MDirector31,140May 21, 20262
Morrison Denise MDirector11,929May 21, 20261
Doi TraceyDirector7,748May 21, 20261
Diaz LuisDirector5,196May 21, 20261
Doherty Catherine T.EVP, Regional Businesses67,122Mar 6, 20264
Deppe Michael JSVP, Corp. Controller & CAO35,196Mar 6, 20263
Gardner Mark ASVP of Molecular Gen & Oncol4,673Sep 26, 20240
Wilensky Gail RDirector20,506May 19, 20230
Rusckowski Stephen HDirector389,597Mar 8, 20230
Guinan MarkExecutive Vice President & CFO98,981Mar 9, 20220
Eglinton Manner CarrieSVP, Advanced Diagnostics48,391Mar 9, 20220

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Jul 28, 2021 (view filing)Jul 271 dayWilensky Gail RDirectorSSale−12.2K$139.30−$1.70M−40.6%17.8K after2 lots
Jul 28, 2021 (view filing)Jul 26-272 daysRusckowski Stephen HChairman, CEO and PresidentSSale−38.6K$140.01−$5.40M−11.9%284.4K after2 lots
Jul 30, 2021 (view filing)Jul 28-292 daysRusckowski Stephen HChairman, CEO and PresidentSSale−149.2K$140.19−$20.9M−34.4%284.4K after3 lots
Dec 1, 2021 (view filing)Nov 292 daysDoherty Catherine T.SVP, Group Exec. Clin. Fran.SSale−37.6K$156.81−$5.89M−35.3%68.7K after5 lots
Feb 28, 2022 (view filing)Feb 244 daysPrevoznik Michael ESVP & General CounselSSale−1.67K$126.26−$210.7K−4.3%37.1K after
Feb 28, 2022 (view filing)Feb 244 daysDoherty Catherine T.SVP, Group Exec. Clin. Fran.SSale−2.75K$126.26−$347.2K−4.1%64.4K after
Mar 2, 2022 (view filing)Feb 282 daysPrevoznik Michael ESVP & General CounselSSale−661$130.00−$85.9K−1.7%39.2K after
Mar 9, 2022 (view filing)Mar 81 dayDoherty Catherine T.SVP, Group Exec. Clin. Fran.SSale−7.03K$135.21−$950.8K−9.4%67.7K after
Mar 9, 2022 (view filing)Mar 81 dayPrevoznik Michael ESVP & General CounselSSale−6.23K$135.21−$842.1K−13.7%39.2K after
May 19, 2022 (view filing)May 172 daysPrevoznik Michael ESVP & General CounselSSale−50.6K$139.97−$7.08M−56.3%39.2K after
May 25, 2022 (view filing)May 23-242 daysRusckowski Stephen HChairman, CEO and PresidentSSale−359.9K$140.13−$50.4M−51.8%334.8K after8 lots
May 26, 2022 (view filing)May 251 dayRusckowski Stephen HChairman, CEO and PresidentSSale−24.9K$140.89−$3.51M−6.9%334.8K after6 lots
Jul 5, 2022 (view filing)Jul 14 daysRing Timothy MDirectorSSale−2.00K$133.47−$266.9K−7.7%23.9K after
Aug 2, 2022 (view filing)Aug 11 dayRing Timothy MDirectorSSale−2.00K$136.04−$272.1K−7.7%23.9K after
Sep 6, 2022 (view filing)Sep 15 daysRing Timothy MDirectorSSale−2.00K$125.02−$250.0K−7.7%23.9K after
Oct 4, 2022 (view filing)Oct 31 dayRing Timothy MDirectorSSale−2.00K$123.39−$246.8K−7.7%23.9K after
Oct 27, 2022 (view filing)Oct 261 dayDeppe Michael JVP, Corp. Controller & CAOSSale−15.5K$145.00−$2.25M−32.6%32.0K after
Nov 2, 2022 (view filing)Nov 11 dayRing Timothy MDirectorSSale−2.00K$144.06−$288.1K−7.6%24.1K after
Nov 29, 2022 (view filing)Nov 281 dayDoherty Catherine T.SVP, Regional BusinessesSSale−40.8K$149.18−$6.08M−37.6%67.7K after2 lots
Dec 5, 2022 (view filing)Dec 14 daysRing Timothy MDirectorSSale−2.02K$152.50−$308.8K−7.7%24.1K after
Feb 27, 2023 (view filing)Feb 243 daysDoherty Catherine T.SVP, Regional BusinessesSSale−1.69K$141.42−$239.0K−2.4%68.9K after
Feb 27, 2023 (view filing)Feb 243 daysPrevoznik Michael ESVP & General CounselSSale−1.42K$141.42−$200.1K−3.5%39.4K after
Mar 3, 2023 (view filing)Mar 21 dayPrevoznik Michael ESVP & General CounselSSale−593$138.54−$82.2K−1.5%38.5K after
Mar 6, 2023 (view filing)Mar 33 daysDoherty Catherine T.SVP, Regional BusinessesSSale−717$140.63−$100.8K−1.0%67.8K after
Mar 8, 2023 (view filing)Mar 71 dayDoherty Catherine T.SVP, Regional BusinessesSSale−5.31K$140.55−$745.9K−7.3%67.8K after
Mar 8, 2023 (view filing)Mar 71 dayPrevoznik Michael ESVP & General CounselSSale−4.75K$140.55−$668.2K−11.0%38.5K after
Feb 23, 2024 (view filing)Feb 221 dayDoherty Catherine T.EVP, Regional BusinessesSSale−821$126.14−$103.6K−1.1%70.8K after10b5-1
Feb 23, 2024 (view filing)Feb 23Same dayGregg Vicky BDirectorSSale−2.50K$126.64−$316.6K−13.3%16.3K after
Feb 23, 2024 (view filing)Feb 221 dayPrevoznik Michael ESVP & General CounselSSale−661$126.14−$83.4K−1.6%40.2K after10b5-1
Mar 1, 2024 (view filing)Feb 291 dayPrevoznik Michael ESVP & General CounselSSale−5.61K$125.88−$706.3K−12.7%38.5K after10b5-1
Mar 1, 2024 (view filing)Feb 28-292 daysDoherty Catherine T.EVP, Regional BusinessesSSale−6.74K$126.45−$852.8K−9.0%68.4K after2 lots10b5-1
May 1, 2024 (view filing)Apr 292 daysKuppusamy KarthikSVP, Clinical SolutionsSSale−1.76K$140.00−$246.4K−11.6%13.4K after10b5-1
Jul 26, 2024 (view filing)Jul 242 daysDelaney Mark ESVP & Chief Commercial OfficerSSale−420$143.08−$60.1K−7.7%5.02K after
Aug 29, 2024 (view filing)Aug 281 dayKuppusamy KarthikSVP, Clinical SolutionsSSale−1.99K$153.26−$305.0K−14.8%11.5K after
Sep 3, 2024 (view filing)Aug 295 daysPrevoznik Michael ESVP & General CounselSSale−32.6K$154.97−$5.04M−45.8%38.5K after
Oct 30, 2024 (view filing)Oct 282 daysKuppusamy KarthikSVP, Clinical SolutionsSSale−1.77K$156.92−$278.5K−15.4%9.73K after
Nov 7, 2024 (view filing)Nov 61 dayDeppe Michael JSVP, Corp. Controller & CAOSSale−18.8K$154.04−$2.89M−34.9%34.9K after6 lots
Dec 2, 2024 (view filing)Nov 275 daysDoherty Catherine T.EVP, Regional BusinessesSSale−33.1K$162.99−$5.40M−32.6%68.4K after2 lots
Dec 2, 2024 (view filing)Nov 293 daysPrevoznik Michael ESVP & General CounselSSale−35.1K$163.07−$5.73M−47.7%38.5K after2 lots
Feb 7, 2025 (view filing)Feb 52 daysDelaney Mark ESVP & Chief Commercial OfficerSSale−403$164.30−$66.2K−8.0%4.62K after
Feb 7, 2025 (view filing)Feb 52 daysGregg Vicky BDirectorSSale−1.25K$164.57−$205.7K−6.9%16.9K after
Feb 21, 2025 (view filing)Feb 19-202 daysDoherty Catherine T.EVP, Regional BusinessesSSale−1.43K$170.51−$244.5K−2.0%70.5K after2 lots10b5-1
Feb 21, 2025 (view filing)Feb 192 daysPlewman PatrickSVP for Diagnostic ServicesSSale−320$169.71−$54.3K−1.7%18.1K after
Feb 21, 2025 (view filing)Feb 201 dayPrevoznik Michael ESVP & General CounselSSale−604$170.99−$103.3K−1.5%39.8K after10b5-1
Feb 28, 2025 (view filing)Feb 271 dayDoherty Catherine T.EVP, Regional BusinessesSSale−824$172.61−$142.2K−1.2%69.2K after10b5-1
Feb 28, 2025 (view filing)Feb 271 dayPrevoznik Michael ESVP & General CounselSSale−528$172.61−$91.1K−1.3%39.0K after10b5-1
Mar 5, 2025 (view filing)Mar 41 dayPrevoznik Michael ESVP & General CounselSSale−592$175.79−$104.1K−1.5%38.1K after10b5-1
Mar 5, 2025 (view filing)Mar 41 dayDoherty Catherine T.EVP, Regional BusinessesSSale−716$175.79−$125.9K−1.0%68.1K after10b5-1
Mar 7, 2025 (view filing)Mar 52 daysDoherty Catherine T.EVP, Regional BusinessesSSale−5.37K$174.13−$935.1K−7.3%68.1K after10b5-1
Mar 19, 2025 (view filing)Mar 172 daysPrevoznik Michael ESVP & General CounselSSale−4.64K$170.00−$789.3K−10.9%38.1K after10b5-1