Michael S Weiss - Net Worth and Insider Trading

Michael S Weiss Net Worth

The estimated net worth of Michael S Weiss is at least $207 Million dollars as of 2024-05-12. Michael S Weiss is the CEO and President of TG Therapeutics Inc and owns about 12,073,021 shares of TG Therapeutics Inc (TGTX) stock worth over $201 Million. Michael S Weiss is the 10% Owner of Keryx Biopharmaceuticals Inc and owns about 1,320,418 shares of Keryx Biopharmaceuticals Inc (KERX) stock worth over $4 Million. Michael S Weiss is also the See Remarks of Fortress Biotech Inc and owns about 1,130,520 shares of Fortress Biotech Inc (FBIO) stock worth over $2 Million. Details can be seen in Michael S Weiss's Latest Holdings Summary section.

Disclaimer: The insider information is derived from SEC filings. The estimated net worth is based on the assumption that Michael S Weiss has not made any transactions after 2023-11-14 and currently still holds the listed stock(s).

Transaction Summary of Michael S Weiss

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Michael S Weiss Insider Ownership Reports

Based on ownership reports from SEC filings, as the reporting owner, Michael S Weiss owns 9 companies in total, including Mustang Bio Inc (MBIO) , TG Therapeutics Inc (TGTX) , and Checkpoint Therapeutics Inc (CKPT) among others .

Click here to see the complete history of Michael S Weiss’s form 4 insider trades.

Insider Ownership Summary of Michael S Weiss

Ticker Comapny Transaction Date Type of Owner
MBIO Mustang Bio Inc 2018-06-14 director
TGTX TG Therapeutics Inc 2023-08-11 director & CEO and President
CKPT Checkpoint Therapeutics Inc 2020-06-05 director
2020-01-01 director & 10 percent owner & EXECUTIVE VICE CHAIRMAN
2017-03-13 director
2016-09-12 director & 10 percent owner
2014-12-12 director & Co-Chairman of the Board
2010-05-10 10 percent owner
2008-08-22 director

Michael S Weiss Latest Holdings Summary

Michael S Weiss currently owns a total of 3 stocks. Among these stocks, Michael S Weiss owns 12,073,021 shares of TG Therapeutics Inc (TGTX) as of August 11, 2023, with a value of $201 Million and a weighting of 96.94%. Michael S Weiss owns 1,320,418 shares of Keryx Biopharmaceuticals Inc (KERX) as of May 10, 2010, with a value of $4 Million and a weighting of 2.14%. Michael S Weiss also owns 1,130,520 shares of Fortress Biotech Inc (FBIO) as of November 14, 2023, with a value of $2 Million and a weighting of 0.91%.

Latest Holdings of Michael S Weiss

Ticker Comapny Latest Transaction Date Shares Owned Current Price ($) Current Value ($)
TGTX TG Therapeutics Inc 2023-08-11 12,073,021 16.62 200,653,609
KERX Keryx Biopharmaceuticals Inc 2010-05-10 1,320,418 3.36 4,436,604
FBIO Fortress Biotech Inc 2023-11-14 1,130,520 1.67 1,887,968

Holding Weightings of Michael S Weiss


Michael S Weiss Form 4 Trading Tracker

According to the SEC Form 4 filings, Michael S Weiss has made a total of 3 transactions in TG Therapeutics Inc (TGTX) over the past 5 years, including 2 buys and 1 sells. The most-recent trade in TG Therapeutics Inc is the acquisition of 100,000 shares on August 11, 2023, which cost Michael S Weiss around $1 Million.

According to the SEC Form 4 filings, Michael S Weiss has made a total of 0 transactions in Keryx Biopharmaceuticals Inc (KERX) over the past 5 years. The most-recent trade in Keryx Biopharmaceuticals Inc is the sale of 397,719 shares on May 10, 2010, which brought Michael S Weiss around $2 Million.

According to the SEC Form 4 filings, Michael S Weiss has made a total of 1 transactions in Fortress Biotech Inc (FBIO) over the past 5 years, including 1 buys and 0 sells. The most-recent trade in Fortress Biotech Inc is the acquisition of 147,058 shares on November 14, 2023, which cost Michael S Weiss around $249,999.

Insider Trading History of Michael S Weiss

No transactions are available. GuruFocus only tracks and displays the purchase and sale of non-derivative security in open market or private transactions from SEC filings with the transaction code of P or S.
Total 0
  • 1
Only the transactions in Open Market or Private Sale at the market prices are included. Other transactions such as conversion of derivative security or exercise of options are not included. Insiders are limited to only officers and/or directors of the company.

Michael S Weiss Trading Performance

GuruFocus tracks the stock performance after each of Michael S Weiss's buying transactions within different timeframes. To be detailed, the average return of stocks after 3 months bought by Michael S Weiss is 42.07%. GuruFocus also compares Michael S Weiss's trading performance to market benchmark return within the same time period. The performance of stocks bought by Michael S Weiss within 3 months outperforms 5 times out of 7 transactions in total compared to the return of S&P 500 within the same period.

You can select different timeframes to see how Michael S Weiss's insider trading performs compared to the benchmark.

Please note GuruFocus will not track the insiders’ transaction performance if he/she does not have buying transactions.

Performance of Michael S Weiss

Average Return

Average return per transaction

Outperforming Transactions

5 out of 5 outperforming transactions.
Each transaction is measured over a period and compared to .
1 Month 3 Months 6 Months 1 Year 2 Years 3 Years
Return(%) 23.43
Relative Return to S&P 500(%) 21.85

Michael S Weiss Ownership Network

Ownership Network List of Michael S Weiss

No Data

Ownership Network Relation of Michael S Weiss


Michael S Weiss Owned Company Details

What does Mustang Bio Inc do?

Who are the key executives at Mustang Bio Inc?

Michael S Weiss is the director of Mustang Bio Inc. Other key executives at Mustang Bio Inc include 10 percent owner Fortress Biotech, Inc. , director & President and CEO Manuel Md Litchman , and Interim CFO Eliot M Lurier .

Mustang Bio Inc (MBIO) Insider Trades Summary

In summary, during the past 3 months, insiders sold 0 shares of Mustang Bio Inc (MBIO) in total and bought 0 shares, with a net sale of 0 shares. During the past 18 months, 0 shares of Mustang Bio Inc (MBIO) were sold and 0 shares were bought by its insiders, resulting in a net sale of 0 shares.

Mustang Bio Inc (MBIO)'s detailed insider trading history can be found in Insider Trading Tracker table.

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Mustang Bio Inc Insider Transactions

No Available Data

Michael S Weiss Mailing Address

Above is the net worth, insider trading, and ownership report for Michael S Weiss. You might contact Michael S Weiss via mailing address: 750 Lexington Ave, New York Ny 10022.

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