Michael Stubblefield - Net Worth and Insider Trading
Michael Stubblefield Net Worth
The estimated net worth of Michael Stubblefield is at least $19 Million dollars as of 2025-05-07. Michael Stubblefield is the CEO of Avantor Inc and owns about 1,619,341 shares of Avantor Inc (AVTR) stock worth over $19 Million. Details can be seen in Michael Stubblefield'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 Michael Stubblefield has not made any transactions after 2022-11-16 and currently still holds the listed stock(s). Please note that this estimate may not reflect the actual net worth.

Transaction Summary of Michael Stubblefield
Michael Stubblefield Insider Ownership Reports
Based on ownership reports from SEC filings, as the reporting owner, Michael Stubblefield owns 2 companies in total, including Avantor Inc (AVTR) , and Ingersoll Rand Inc (IR) .
Click here to see the complete history of Michael Stubblefield’s form 4 insider trades.
Insider Ownership Summary of Michael Stubblefield
Ticker | Company | Transaction Date | Type of Owner |
---|---|---|---|
AVTR | Avantor Inc | 2022-11-16 | director & President and CEO |
IR | Ingersoll Rand Inc | 2022-07-28 | director |
Michael Stubblefield Latest Holdings Summary
Michael Stubblefield currently owns a total of 1 stock. Michael Stubblefield owns 1,619,341 shares of Avantor Inc (AVTR) as of November 16, 2022, with a value of $19 Million.
Latest Holdings of Michael Stubblefield
Ticker | Company | Latest Transaction Date | Shares Owned | Current Price ($) | Current Value ($) |
---|---|---|---|---|---|
AVTR | Avantor Inc | 2022-11-16 | 1,619,341 | 11.98 | 19,399,705 |
Holding Weightings of Michael Stubblefield
Michael Stubblefield Form 4 Trading Tracker
According to the SEC Form 4 filings, Michael Stubblefield has made a total of 4 transactions in Avantor Inc (AVTR) over the past 5 years, including 1 buys and 3 sells. The most-recent trade in Avantor Inc is the acquisition of 15,000 shares on November 16, 2022, which cost Michael Stubblefield around $314,250.
Insider Trading History of Michael Stubblefield
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Michael Stubblefield Trading Performance
GuruFocus tracks the stock performance after each of Michael Stubblefield's buying transactions within different timeframes. To be detailed, the average return of stocks after 3 months bought by Michael Stubblefield is 18.7%. GuruFocus also compares Michael Stubblefield's trading performance to market benchmark return within the same time period. The performance of stocks bought by Michael Stubblefield within 3 months outperforms 1 times out of 1 transactions in total compared to the return of S&P 500 within the same period.
You can select different timeframes to see how Michael Stubblefield's insider trading performs compared to the benchmark.
Performance of Michael Stubblefield
Michael Stubblefield Ownership Network
Ownership Network List of Michael Stubblefield
Ownership Network Relation of Michael Stubblefield

Michael Stubblefield's Compensation Overview
Company | Year | Salary($) | Bonus($) | Stock Awards($) | Option Awards($) | Equity Awards($) | Non-Equity Incentive Plan($) | All Other Compensation($) | Change in Pension and Deferred Comp($) | Total($) |
---|---|---|---|---|---|---|---|---|---|---|
Avantor Inc | 2023 | 1,140,000 | N/A | 8,529,219 | 2,437,053 | N/A | 188,100 | 36,500 | 7,895 | 12,338,767 |
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Michael Stubblefield Owned Company Details
What does Avantor Inc do?
Who are the key executives at Avantor Inc?
Michael Stubblefield is the director & President and CEO of Avantor Inc. Other key executives at Avantor Inc include EVP & Strategic Partners James Bramwell , SVP & Chief Accounting Officer Steven W Eck , and See Remarks Christophe Couturier .
Avantor Inc (AVTR) Insider Trades Summary
Over the past 18 months, Michael Stubblefield made no insider transaction in Avantor Inc (AVTR). Other recent insider transactions involving Avantor Inc (AVTR) include a net sale of 15,645 shares made by James Bramwell , a net sale of 13,150 shares made by Steven W Eck , and a net sale of 23,174 shares made by Christophe Couturier .
In summary, during the past 3 months, insiders sold 10,472 shares of Avantor Inc (AVTR) in total and bought 46,191 shares, with a net purchase of 35,719 shares. During the past 18 months, 51,969 shares of Avantor Inc (AVTR) were sold and 46,191 shares were bought by its insiders, resulting in a net sale of 5,778 shares.
Avantor Inc (AVTR)'s detailed insider trading history can be found in Insider Trading Tracker table.
Avantor Inc Insider Transactions
Michael Stubblefield Mailing Address
Above is the net worth, insider trading, and ownership report for Michael Stubblefield. Based on the public information released on the U.S. Securities and Exchange Commission (SEC) website, Michael Stubblefield's mailing address is: Radnor Pa 19087.