Theodore Leonsis

Companies

• Tempus AIBoard member Jun 13, 2024 to now¹
• GrouponBoard member Nov 3, 2011 to now²
• American ExpressBoard member Jul 22, 2010 to now³
• GrouponChief executive officer Apr 2, 2013 to Jun 17, 2013⁴
• Rosetta StoneBoard member Dec 11, 2009 to May 25, 2012⁵
• NutrisystemBoard member Dec 23, 2008 to May 16, 2011⁶

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• Tempus AI TEM88,180 shares⁷$5.7M at $64.80May 26, 2026
• Groupon GRPN225,285 shares⁸$3.8M at $16.69Jun 11, 2026
• American Express AXP0 shares⁹Jun 3, 2022

As of each latest filing. The line shows shares held over time.

Recent filings

• Jun 11, 2026Exercised options 6,685 shares of Groupon⁸
• May 21, 2026Granted 5,913 shares of Tempus AI⁷
• Aug 26, 2025Sold 20,000 shares at $75.83 of Tempus AI¹⁰
• Aug 13, 2025Sold 44,000 shares at $69.90 of Tempus AI¹¹
• Aug 13, 2025Sold 44,000 shares at $69.90 of Tempus AI¹²
• Jun 12, 2025Granted 13,343 shares at $32.33 of Groupon¹³
• Jun 11, 2025Sold 21,731 shares at $68.27 of Tempus AI¹⁴
• Jun 11, 2025Sold 184,116 shares at $67.59 of Tempus AI¹⁴
• May 20, 2025Granted 1,997 shares of Tempus AI¹⁵
• May 9, 2025Sold 770 shares at $66.26 of Tempus AI¹⁶
• Dec 11, 2024Sold 233,149 shares at $41.60 of Tempus AI¹⁷
• Dec 11, 2024Sold 166,851 shares at $40.73 of Tempus AI¹⁷
• Dec 11, 2024Shares withheld for tax 4,153 shares at $43.19 of Tempus AI¹⁷
• Dec 11, 2024Exercised options 210,000 shares at $0.85 of Tempus AI¹⁷
• Jun 17, 2024Granted 397,888 shares of Tempus AI¹⁸
• Jun 17, 2024Converted 3,263,060 shares of Tempus AI¹⁸
• Jun 13, 2024Granted 13,514 shares of Tempus AI¹⁸
• Jun 12, 2024Granted 13,343 shares of Groupon¹⁹
• Jun 14, 2023Granted 48,197 shares of Groupon²⁰
• Jun 15, 2022Granted 14,488 shares of Groupon²¹
• Jun 3, 2022Sold 4,005 shares at $166.63 of American Express⁹
• Jan 30, 2020Sold 7,575 shares at $132.61 of American Express²²
• Oct 23, 2019Sold 8,420 shares at $116.44 of American Express²³
• Jan 22, 2013Gift 5,000 shares of American Express²⁴
• Feb 25, 2011Bought 2,700 shares at $43.56 of American Express²⁵

Trade performance

Returns are price-only (no dividends), measured from the trade date.