Martin D Madaus - Net Worth and Insider Trading
Martin D Madaus Net Worth
The estimated net worth of Martin D Madaus is at least $5 Million dollars as of 2025-07-15. Martin D Madaus is the Director of Mettler-Toledo International Inc and owns about 2,009 shares of Mettler-Toledo International Inc (MTD) stock worth over $2 Million. Martin D Madaus is the Director of Quanterix Corp and owns about 273,076 shares of Quanterix Corp (QTRX) stock worth over $2 Million. Martin D Madaus is also the Director of Repligen Corp and owns about 4,624 shares of Repligen Corp (RGEN) stock worth over $551,504. Besides these, Martin D Madaus also holds Hologic Inc (HOLX) , Azenta Inc (AZTA) . Details can be seen in Martin D Madaus'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 Martin D Madaus has not made any transactions after 2025-05-07 and currently still holds the listed stock(s). Please note that this estimate may not reflect the actual net worth.

Transaction Summary of Martin D Madaus
Martin D Madaus Insider Ownership Reports
Based on ownership reports from SEC filings, as the reporting owner, Martin D Madaus owns 4 companies in total, including Quanterix Corp (QTRX) , Mettler-Toledo International Inc (MTD) , and Standard BioTools Inc (LAB) among others .
Click here to see the complete history of Martin D Madaus’s form 4 insider trades.
Insider Ownership Summary of Martin D Madaus
Ticker | Company | Transaction Date | Type of Owner |
---|---|---|---|
QTRX | Quanterix Corp | 2022-08-10 | director |
MTD | Mettler-Toledo International Inc | 2014-11-18 | director |
LAB | Standard BioTools Inc | 2023-10-20 | director |
![]() | ![]() | 2024-06-14 | director |
Martin D Madaus Latest Holdings Summary
Martin D Madaus currently owns a total of 5 stocks. Among these stocks, Martin D Madaus owns 2,009 shares of Mettler-Toledo International Inc (MTD) as of November 18, 2014, with a value of $2 Million and a weighting of 45.83%. Martin D Madaus owns 273,076 shares of Quanterix Corp (QTRX) as of August 10, 2022, with a value of $2 Million and a weighting of 29.42%. Martin D Madaus also owns 4,624 shares of Repligen Corp (RGEN) as of June 14, 2024, with a value of $551,504 and a weighting of 10.71%. The other 2 stocks Hologic Inc (HOLX) , Azenta Inc (AZTA) have a combined weighting of 14.05% among all his current holdings.
Latest Holdings of Martin D Madaus
Ticker | Company | Latest Transaction Date | Shares Owned | Current Price ($) | Current Value ($) |
---|---|---|---|---|---|
MTD | Mettler-Toledo International Inc | 2014-11-18 | 2,009 | 1,175.10 | 2,360,776 |
QTRX | Quanterix Corp | 2022-08-10 | 273,076 | 5.55 | 1,515,544 |
RGEN | Repligen Corp | 2024-06-14 | 4,624 | 119.27 | 551,504 |
HOLX | Hologic Inc | 2025-05-07 | 7,651 | 63.70 | 487,369 |
AZTA | Azenta Inc | 2024-11-19 | 7,405 | 31.91 | 236,294 |
Holding Weightings of Martin D Madaus
Martin D Madaus Form 4 Trading Tracker
According to the SEC Form 4 filings, Martin D Madaus has made a total of 0 transactions in Mettler-Toledo International Inc (MTD) over the past 5 years. The most-recent trade in Mettler-Toledo International Inc is the sale of 4,590 shares on November 18, 2014, which brought Martin D Madaus around $1 Million.
According to the SEC Form 4 filings, Martin D Madaus has made a total of 10 transactions in Quanterix Corp (QTRX) over the past 5 years, including 1 buys and 9 sells. The most-recent trade in Quanterix Corp is the acquisition of 89,667 shares on August 10, 2022, which cost Martin D Madaus around $755,893.
According to the SEC Form 4 filings, Martin D Madaus has made a total of 2 transactions in Repligen Corp (RGEN) over the past 5 years, including 2 buys and 0 sells. The most-recent trade in Repligen Corp is the acquisition of 1,615 shares on June 14, 2024, which cost Martin D Madaus around $201,778.
More details on Martin D Madaus's insider transactions can be found in the Insider Trading History of Martin D Madaus table.Insider Trading History of Martin D Madaus
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Martin D Madaus Trading Performance
GuruFocus tracks the stock performance after each of Martin D Madaus's buying transactions within different timeframes. To be detailed, the average return of stocks after 3 months bought by Martin D Madaus is 15.44%. GuruFocus also compares Martin D Madaus's trading performance to market benchmark return within the same time period. The performance of stocks bought by Martin D Madaus within 3 months outperforms 6 times out of 6 transactions in total compared to the return of S&P 500 within the same period.
You can select different timeframes to see how Martin D Madaus's insider trading performs compared to the benchmark.
Performance of Martin D Madaus
Martin D Madaus Ownership Network
Ownership Network List of Martin D Madaus
Ownership Network Relation of Martin D Madaus

Martin D Madaus Owned Company Details
What does Quanterix Corp do?
Who are the key executives at Quanterix Corp?
Martin D Madaus is the director of Quanterix Corp. Other key executives at Quanterix Corp include President & Quanterix & Dx Masoud Toloue , Chief Financial Officer Vandana Sriram , and CFO and Treasurer Michael A Doyle .
Quanterix Corp (QTRX) Insider Trades Summary
Over the past 18 months, Martin D Madaus made no insider transaction in Quanterix Corp (QTRX). Other recent insider transactions involving Quanterix Corp (QTRX) include a net purchase of 417,000 shares made by David R Walt , a net sale of 4,000 shares made by Laurie J Olson , and a net purchase of 64,900 shares made by Masoud Toloue .
In summary, during the past 3 months, insiders sold 0 shares of Quanterix Corp (QTRX) in total and bought 509,013 shares, with a net purchase of 509,013 shares. During the past 18 months, 4,000 shares of Quanterix Corp (QTRX) were sold and 575,013 shares were bought by its insiders, resulting in a net purchase of 571,013 shares.
Quanterix Corp (QTRX)'s detailed insider trading history can be found in Insider Trading Tracker table.
Quanterix Corp Insider Transactions
Martin D Madaus Mailing Address
Above is the net worth, insider trading, and ownership report for Martin D Madaus. Based on the public information released on the U.S. Securities and Exchange Commission (SEC) website, Martin D Madaus's mailing address is: Billerica Ma 01821.