Mark S Siegel Net Worth
Emily Wilson
Updated on March 15, 2026
The estimated Net Worth of Mark S Siegel is at least $244 Million dollars as of 26 April 2019. Mark Siegel owns over 350,000 units of Patterson-UTI Inc stock worth over $20,680,430 and over the last 20 years Mark sold PTEN stock worth over $223,216,332.
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Mark Siegel PTEN stock SEC Form 4 insiders trading
Mark has made over 11 trades of the Patterson-UTI Inc stock since 2004, according to the Form 4 filled with the SEC. Most recently Mark exercised 350,000 units of PTEN stock worth $4,609,500 on 26 April 2019.
The largest trade Mark's ever made was selling 2,378,500 units of Patterson-UTI Inc stock on 1 August 2005 worth over $78,442,930. On average, Mark trades about 288,034 units every 179 days since 2004. As of 26 April 2019 Mark still owns at least 1,792,065 units of Patterson-UTI Inc stock.
You can see the complete history of Mark Siegel stock trades at the bottom of the page.
