Insider Trading

Mark Guinan Net Worth

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Last Updated: 13 hours ago

Mark Guinan has an estimated net worth of at least $16.7 million*, as of yesterday. They own 98,981 shares of DGX stock.

Mark Guinan $DGX SEC Form 4 Insider Trading

Mark Guinan has filed a total of 0 insider trades in $DGX since 2021. We estimate that they now own 98,981 shares of $DGX, worth an estimated $16.7 million.



Insider Trading at $DGX

There have been a total of 97 insider trades reported at $DGX since 2021, with 0 shares purchased and 975,458 shares sold. The most active insider traders in $DGX stock have been Stephen H Rusckowski, J. E. Davis, and Michael E Prevoznik. The most recent trade was a sale of 874 shares reported by MARK E DELANEY (SVP & Chief Commercial Officer), made on May 12, 2025.



History of Insider Stock Trades by Mark Guinan

Company Ticker Purchase / Sale Shares Date Disclosed (EST)
No Trades Available - - - -




$DGX Executives and Stock Owners with Insider Trades



*This is only based off of information found in SEC filings, and may not reflect actual net worth. There may also be inaccuracies due to privately holdings filing errors, parsing errors, accidental double-counting of shares, incorrect classification of indirectly owned shares, sales prior to dataset start date, or any other number of issues.