Theodore Leonsis - Net Worth and Insider Trading
Theodore Leonsis Net Worth
The estimated net worth of Theodore Leonsis is at least $187 Million dollars as of 2025-04-28. Theodore Leonsis is the Director of Tempus AI Inc and owns about 3,480,309 shares of Tempus AI Inc (TEM) stock worth over $184 Million. Theodore Leonsis is the Director of Groupon Inc and owns about 131,500 shares of Groupon Inc (GRPN) stock worth over $3 Million. Theodore Leonsis is also the Director of American Express Co and owns about 0 shares of American Express Co (AXP) stock worth over $0. Details can be seen in Theodore Leonsis's Latest Holdings Summary section.
Disclaimer: The insider information is derived from SEC filings. The estimated net worth is based on the final shares held after open market or private purchases and sales of common stock with a transaction code of "P" or "S" on Form 4, assuming that Theodore Leonsis has not made any transactions after 2024-12-11 and currently still holds the listed stock(s). Please note that this estimate may not reflect the actual net worth.

Transaction Summary of Theodore Leonsis
Theodore Leonsis Insider Ownership Reports
Based on ownership reports from SEC filings, as the reporting owner, Theodore Leonsis owns 4 companies in total, including American Express Co (AXP) , Groupon Inc (GRPN) , and Rosetta Stone Inc (RST) among others .
Click here to see the complete history of Theodore Leonsis’s form 4 insider trades.
Insider Ownership Summary of Theodore Leonsis
Ticker | Company | Transaction Date | Type of Owner |
---|---|---|---|
AXP | American Express Co | 2022-06-03 | director |
GRPN | Groupon Inc | 2020-04-20 | director |
RST | Rosetta Stone Inc | 2012-05-23 | director |
![]() | ![]() | 2011-05-12 | director |
Theodore Leonsis Latest Holdings Summary
Theodore Leonsis currently owns a total of 3 stocks. Among these stocks, Theodore Leonsis owns 3,480,309 shares of Tempus AI Inc (TEM) as of December 11, 2024, with a value of $184 Million and a weighting of 98.6%. Theodore Leonsis owns 131,500 shares of Groupon Inc (GRPN) as of April 20, 2020, with a value of $3 Million and a weighting of 1.4%. Theodore Leonsis also owns 0 shares of American Express Co (AXP) as of June 3, 2022, with a value of $0 and a weighting of 0%.
Latest Holdings of Theodore Leonsis
Ticker | Company | Latest Transaction Date | Shares Owned | Current Price ($) | Current Value ($) |
---|---|---|---|---|---|
TEM | Tempus AI Inc | 2024-12-11 | 3,480,309 | 52.90 | 184,108,346 |
GRPN | Groupon Inc | 2020-04-20 | 131,500 | 19.89 | 2,615,535 |
AXP | American Express Co | 2022-06-03 | 0 | 264.81 | 0 |
Holding Weightings of Theodore Leonsis
Theodore Leonsis Form 4 Trading Tracker
According to the SEC Form 4 filings, Theodore Leonsis has made a total of 1 transactions in Tempus AI Inc (TEM) over the past 5 years, including 0 buys and 1 sells. The most-recent trade in Tempus AI Inc is the sale of 400,000 shares on December 11, 2024, which brought Theodore Leonsis around $16 Million.
According to the SEC Form 4 filings, Theodore Leonsis has made a total of 0 transactions in Groupon Inc (GRPN) over the past 5 years. The most-recent trade in Groupon Inc is the acquisition of 50,000 shares on April 20, 2020, which cost Theodore Leonsis around $950,000.
According to the SEC Form 4 filings, Theodore Leonsis has made a total of 1 transactions in American Express Co (AXP) over the past 5 years, including 0 buys and 1 sells. The most-recent trade in American Express Co is the sale of 4,005 shares on June 3, 2022, which brought Theodore Leonsis around $667,353.
Insider Trading History of Theodore Leonsis
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Theodore Leonsis Trading Performance
GuruFocus tracks the stock performance after each of Theodore Leonsis's buying transactions within different timeframes. To be detailed, the average return of stocks after 3 months bought by Theodore Leonsis is 5.36%. GuruFocus also compares Theodore Leonsis's trading performance to market benchmark return within the same time period. The performance of stocks bought by Theodore Leonsis within 3 months outperforms 2 times out of 3 transactions in total compared to the return of S&P 500 within the same period.
You can select different timeframes to see how Theodore Leonsis's insider trading performs compared to the benchmark.
Performance of Theodore Leonsis
Theodore Leonsis Ownership Network
Ownership Network List of Theodore Leonsis
Ownership Network Relation of Theodore Leonsis

Theodore Leonsis Owned Company Details
What does American Express Co do?
Who are the key executives at American Express Co?
Theodore Leonsis is the director of American Express Co. Other key executives at American Express Co include Pres. & Global Comm. Services Anna Marrs , Controller Quinn Jessica Lieberman , and EVP & Chief Information Officer Stephen J Squeri .
American Express Co (AXP) Insider Trades Summary
Over the past 18 months, Theodore Leonsis made no insider transaction in American Express Co (AXP). Other recent insider transactions involving American Express Co (AXP) include a net sale of 329,702 shares made by Stephen J Squeri , a net sale of 141,764 shares made by Douglas E. Buckminster , and a net sale of 72,454 shares made by Denise Pickett .
In summary, during the past 3 months, insiders sold 126,573 shares of American Express Co (AXP) in total and bought 3,700 shares, with a net sale of 122,873 shares. During the past 18 months, 954,331 shares of American Express Co (AXP) were sold and 3,700 shares were bought by its insiders, resulting in a net sale of 950,631 shares.
American Express Co (AXP)'s detailed insider trading history can be found in Insider Trading Tracker table.
American Express Co Insider Transactions
Theodore Leonsis Mailing Address
Above is the net worth, insider trading, and ownership report for Theodore Leonsis. Based on the public information released on the U.S. Securities and Exchange Commission (SEC) website, Theodore Leonsis's mailing address is: Arlington Va 22203.