Michael Joseph Plunkett - Net Worth and Insider Trading
Michael Joseph Plunkett Net Worth
The estimated net worth of Michael Joseph Plunkett is at least $206,969 dollars as of 2025-05-25. Michael Joseph Plunkett is the COO of Alphatec Holdings Inc and owns about 16,624 shares of Alphatec Holdings Inc (ATEC) stock worth over $206,969. Details can be seen in Michael Joseph Plunkett'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 Joseph Plunkett has not made any transactions after 2015-08-11 and currently still holds the listed stock(s). Please note that this estimate may not reflect the actual net worth.

Transaction Summary of Michael Joseph Plunkett
Michael Joseph Plunkett Insider Ownership Reports
Based on ownership reports from SEC filings, as the reporting owner, Michael Joseph Plunkett owns 2 companies in total, including Alphatec Holdings Inc (ATEC) , and The First Marblehead Corp (FMD) .
Click here to see the complete history of Michael Joseph Plunkett’s form 4 insider trades.
Insider Ownership Summary of Michael Joseph Plunkett
Ticker | Company | Transaction Date | Type of Owner |
---|---|---|---|
ATEC | Alphatec Holdings Inc | 2017-03-29 | President and COO |
FMD | The First Marblehead Corp | 2011-09-01 | Managing Director |
Michael Joseph Plunkett Latest Holdings Summary
Michael Joseph Plunkett currently owns a total of 1 stock. Michael Joseph Plunkett owns 16,624 shares of Alphatec Holdings Inc (ATEC) as of August 11, 2015, with a value of $206,969.
Latest Holdings of Michael Joseph Plunkett
Ticker | Company | Latest Transaction Date | Shares Owned | Current Price ($) | Current Value ($) |
---|---|---|---|---|---|
ATEC | Alphatec Holdings Inc | 2015-08-11 | 16,624 | 12.45 | 206,969 |
Holding Weightings of Michael Joseph Plunkett
Michael Joseph Plunkett Form 4 Trading Tracker
According to the SEC Form 4 filings, Michael Joseph Plunkett has made a total of 0 transactions in Alphatec Holdings Inc (ATEC) over the past 5 years. The most-recent trade in Alphatec Holdings Inc is the acquisition of 2,500 shares on August 11, 2015, which cost Michael Joseph Plunkett around $21,900.
Insider Trading History of Michael Joseph Plunkett
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Michael Joseph Plunkett Trading Performance
GuruFocus tracks the stock performance after each of Michael Joseph Plunkett's buying transactions within different timeframes. To be detailed, the average return of stocks after 3 months bought by Michael Joseph Plunkett is -57.18%. GuruFocus also compares Michael Joseph Plunkett's trading performance to market benchmark return within the same time period. The performance of stocks bought by Michael Joseph Plunkett within 3 months outperforms 0 times out of 2 transactions in total compared to the return of S&P 500 within the same period.
You can select different timeframes to see how Michael Joseph Plunkett's insider trading performs compared to the benchmark.
Performance of Michael Joseph Plunkett
Michael Joseph Plunkett Ownership Network
Ownership Network List of Michael Joseph Plunkett
Ownership Network Relation of Michael Joseph Plunkett

Michael Joseph Plunkett Owned Company Details
What does Alphatec Holdings Inc do?
Who are the key executives at Alphatec Holdings Inc?
Michael Joseph Plunkett is the President and COO of Alphatec Holdings Inc. Other key executives at Alphatec Holdings Inc include SVP & Development Scott Lish , Chief Financial Officer John Todd Koning , and director & Executive Chairman Patrick Miles .
Alphatec Holdings Inc (ATEC) Insider Trades Summary
Over the past 18 months, Michael Joseph Plunkett made no insider transaction in Alphatec Holdings Inc (ATEC). Other recent insider transactions involving Alphatec Holdings Inc (ATEC) include a net sale of 317,197 shares made by David Sponsel , a net sale of 214,253 shares made by Scott Lish , and a net sale of 288,543 shares made by Patrick Miles .
In summary, during the past 3 months, insiders sold 438,309 shares of Alphatec Holdings Inc (ATEC) in total and bought 0 shares, with a net sale of 438,309 shares. During the past 18 months, 1,449,188 shares of Alphatec Holdings Inc (ATEC) were sold and 224,796 shares were bought by its insiders, resulting in a net sale of 1,224,392 shares.
Alphatec Holdings Inc (ATEC)'s detailed insider trading history can be found in Insider Trading Tracker table.
Alphatec Holdings Inc Insider Transactions
Michael Joseph Plunkett Mailing Address
Above is the net worth, insider trading, and ownership report for Michael Joseph Plunkett. Based on the public information released on the U.S. Securities and Exchange Commission (SEC) website, Michael Joseph Plunkett's mailing address is: Carlsbad Ca 92008.