undamentalytics Newsletter

Quest Diagnostics insider trading

Every open-market purchase and sale by Quest Diagnostics's officers, directors and largest shareholders since November 4, 2021, and what the share price did next.

No insider has bought shares on the open market in five years.

Insider purchase Insider sale Marker size reflects trade value. Weekly closes adjusted for splits; may be delayed.
Quest Diagnostics insider open-market trades
DateInsiderTrade SharesPriceValue 1M after 3M after 6M after

From insiders' Form 4 filings with the SEC: open-market purchases and sales only (awards, option exercises and shares withheld for tax are excluded), combined to one line per insider per day. "Plan" marks trades the filing says were made under a pre-set Rule 10b5-1 trading plan, which are scheduled in advance. Price changes run from the close on the trade date; hover a figure for the change relative to the S&P 500. Past moves don't predict future ones.

Does following Quest Diagnostics’s insiders pay?

From February 5, 2010 to March 6, 2026, 27 insiders reported 4 open-market purchases and 134 sales not made under a pre-set plan in Quest Diagnostics. Twelve months after each purchase was reported, the shares were −1.8% against the S&P 500 on average (median −3.4%), over 4 purchases with a full year of prices; 50% beat the index. After sales, the shares moved −3.3% against the index over 12 months (a negative figure means selling was the right call). That rests on fewer than 20 purchases, too few to read much into. Buying each purchase the day after it was reported, an equal amount each, held 12 months or until that insider reported a sale, would have turned $10,000 on May 10, 2012 into $19,188 by November 2, 2026, +4.6% a year. It held shares 16% of the time; the S&P 500 on those same days, with Treasury bills otherwise, made $19,726 (+4.8% a year), and held throughout $71,450 (+14.6%).

$0$20.0k$40.0k$60.0k 20122014201620182020202220242026 $71.5k$19.7k$19.2k
Copying Quest Diagnostics's insidersS&P 500, same days investedS&P 500, held throughout $10,000 copying every open-market purchase by Quest Diagnostics's insiders from May 10, 2012, before costs and taxes, marked weekly. Uninvested money earns the Treasury bill rate; the portfolio held shares 16% of the time.
Quest Diagnostics: each insider's record
InsiderRolePurchases12 months after their purchasesBeat the S&P 500Sales12 months after their salesLatest report
Hagemann Robert SVP & Chief Financial Officer 0 — — 22 −5.5% (22) January 30, 2012
Bongiorno Thomas F VP and Corporate Controller 0 — — 12 −7.1% (12) February 4, 2015
Wilensky Gail R Director 0 — — 10 −2.3% (10) July 28, 2021
Ziegler John B Director 0 — — 10 −3.5% (10) February 24, 2017
Baldwin John C Md Director 0 — — 9 −9.1% (9) August 13, 2015
Britell Jenne K Director 0 — — 9 +2.3% (9) April 26, 2017
Doherty Catherine T. SVP, Group Exec. Clin. Fran. 0 — — 7 −1.7% (7) May 11, 2021
Pfeiffer Gary M Director 0 — — 7 +1.3% (7) October 24, 2025
Prevoznik Michael E SVP & General Counsel 0 — — 7 −5.0% (7) September 3, 2024
Miller Joan Elizabeth SVP-Oncology & Neurology Srvcs 0 — — 6 −7.7% (6) February 27, 2012
Mohapatra Surya N Chairman, President & CEO 0 — — 5 −10.5% (5) January 30, 2012
Leiden Jeffrey M Director 0 — — 4 −7.2% (4) May 30, 2018
Stanzione Daniel Director 0 — — 4 −1.2% (4) February 12, 2015
Buehler William F Director 0 — — 3 −4.5% (3) February 14, 2014
Gregg Vicky B Director 0 — — 3 +17.5% (2) November 28, 2025
Guinan Mark Executive Vice President & CFO 1 +11.7% (1) 100% 2 +4.2% (2) June 17, 2019
Kuppusamy Karthik SVP, Clinical Solutions 0 — — 3 −1.3% (2) March 6, 2026
Rusckowski Stephen H Chairman, President and CEO 2 −20.4% (2) 0% 1 +6.9% (1) June 17, 2019
Cunningham Everett SVP, Commercial 0 — — 2 +25.9% (2) May 11, 2016
Delaney Mark E SVP & Chief Commercial Officer 0 — — 2 +8.0% (2) February 7, 2025
Cohen Jon R SVP and Chief Medical Officer 0 — — 1 +5.5% (1) November 18, 2014
Gsk PLC Director 0 — — 1 −3.6% (1) February 2, 2011
Klug Robert A VP, Corporate Controller 0 — — 1 −19.6% (1) February 27, 2018
Main Timothy L Director 1 +21.9% (1) 100% 0 — February 7, 2014
Plewman Patrick SVP for Diagnostic Services 0 — — 1 +4.2% (1) February 21, 2025
Ring Timothy M Director 0 — — 1 −23.7% (1) November 2, 2022
Simmons Wayne R. Vice President, Operations 0 — — 1 −2.4% (1) May 13, 2011

Moves are the shares’ return including dividends minus the S&P 500’s, from the close on the first trading day after each report; the number of trades with a finished 12-month window is in brackets. Green means the trade went the insider’s way (a purchase ahead of the index, a sale followed by the shares trailing it). A trade reported both by a director or officer and by a fund or company they are linked to counts once here, under the person. Purchases count only where the share price actually traded was at least $5. These figures describe what the shares did, not why anyone traded. Insiders across all companies.

When several insiders traded Quest Diagnostics

Months when 2 or more insiders became net buyers, or 3 or more net sellers, of Quest Diagnostics in reports dated in the 91 days before the month end, and how the stock did against the S&P 500 from that month end. After 11 selling crowds, −1.4%. One company's history is too short to judge by; the test across every company is the better guide.

MonthCrowd3 months on, vs S&P 5006 months12 months
February 28, 20253 selling+1.3%−3.2%+6.9%
September 30, 20243 selling−5.1%+10.2%+0.8%
February 28, 20173 selling+8.7%+6.4%−9.4%
May 31, 20163 selling+5.2%+9.3%+26.2%
November 28, 20143 selling+6.8%+12.6%+4.1%
March 31, 20143 selling−3.3%+0.7%+23.0%
July 31, 20133 selling−3.3%−16.6%−9.6%
May 31, 20123 selling−1.0%−7.1%−15.7%
November 30, 20116 selling−11.4%−9.2%−16.0%
February 28, 20119 selling+1.0%−4.0%−1.5%
April 30, 20103 selling−10.9%−14.8%−17.7%

Colours show whether the crowd was right: green when buyers were followed by a rise above the index, or sellers by a fall below it. Total returns from the month end; past patterns are not a forecast.

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