Stephen P Macmillan - Net Worth and Insider Trading
Stephen P Macmillan Net Worth
The estimated net worth of Stephen P Macmillan is at least $182 Million dollars as of 2025-03-26. Stephen P Macmillan is the Chairman, President and CEO of Hologic Inc and owns about 2,304,391 shares of Hologic Inc (HOLX) stock worth over $141 Million. Stephen P Macmillan is also the President & CEO of Stryker Corp and owns about 112,586 shares of Stryker Corp (SYK) stock worth over $41 Million. Details can be seen in Stephen P Macmillan'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 Stephen P Macmillan has not made any transactions after 2024-07-30 and currently still holds the listed stock(s). Please note that this estimate may not reflect the actual net worth.

Transaction Summary of Stephen P Macmillan
Stephen P Macmillan Insider Ownership Reports
Based on ownership reports from SEC filings, as the reporting owner, Stephen P Macmillan owns 7 companies in total, including Boston Scientific Corp (BSX) , Hologic Inc (HOLX) , and Alere Inc (ALR) among others .
Click here to see the complete history of Stephen P Macmillan’s form 4 insider trades.
Insider Ownership Summary of Stephen P Macmillan
Ticker | Comapny | Transaction Date | Type of Owner |
---|---|---|---|
BSX | Boston Scientific Corp | 2019-05-09 | director |
HOLX | Hologic Inc | 2024-07-30 | director & President and CEO |
ALR | Alere Inc | 2013-10-31 | director |
![]() | ![]() | 2008-09-18 | director |
![]() | ![]() | 2005-10-21 | director & President & CEO |
![]() | ![]() | 2013-08-14 | director |
![]() | ![]() | 2023-06-01 | director |
Stephen P Macmillan Latest Holdings Summary
Stephen P Macmillan currently owns a total of 2 stocks. Among these stocks, Stephen P Macmillan owns 2,304,391 shares of Hologic Inc (HOLX) as of July 30, 2024, with a value of $141 Million and a weighting of 77.28%. Stephen P Macmillan also owns 112,586 shares of Stryker Corp (SYK) as of October 21, 2005, with a value of $41 Million and a weighting of 22.72%.
Latest Holdings of Stephen P Macmillan
Ticker | Comapny | Latest Transaction Date | Shares Owned | Current Price ($) | Current Value ($) |
---|---|---|---|---|---|
HOLX | Hologic Inc | 2024-07-30 | 2,304,391 | 61.09 | 140,775,246 |
SYK | Stryker Corp | 2005-10-21 | 112,586 | 367.55 | 41,380,984 |
Holding Weightings of Stephen P Macmillan
Stephen P Macmillan Form 4 Trading Tracker
According to the SEC Form 4 filings, Stephen P Macmillan has made a total of 6 transactions in Hologic Inc (HOLX) over the past 5 years, including 0 buys and 6 sells. The most-recent trade in Hologic Inc is the sale of 44,039 shares on July 30, 2024, which brought Stephen P Macmillan around $4 Million.
According to the SEC Form 4 filings, Stephen P Macmillan has made a total of 0 transactions in Stryker Corp (SYK) over the past 5 years. The most-recent trade in Stryker Corp is the acquisition of 5,000 shares on October 21, 2005, which cost Stephen P Macmillan around $201,850.
Insider Trading History of Stephen P Macmillan
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Stephen P Macmillan Trading Performance
GuruFocus tracks the stock performance after each of Stephen P Macmillan's buying transactions within different timeframes. To be detailed, the average return of stocks after 3 months bought by Stephen P Macmillan is 8.51%. GuruFocus also compares Stephen P Macmillan's trading performance to market benchmark return within the same time period. The performance of stocks bought by Stephen P Macmillan 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 Stephen P Macmillan's insider trading performs compared to the benchmark.
Performance of Stephen P Macmillan
Stephen P Macmillan Ownership Network
Ownership Network List of Stephen P Macmillan
Ownership Network Relation of Stephen P Macmillan

Stephen P Macmillan Owned Company Details
What does Boston Scientific Corp do?
Who are the key executives at Boston Scientific Corp?
Stephen P Macmillan is the director of Boston Scientific Corp. Other key executives at Boston Scientific Corp include SVP & GC and Corp. Secretary Vance R Brown , SVP&Pres & Periph Intervent Jeffrey B. Mirviss , and SVP & Glob Ops & Qual John Bradley Sorenson .
Boston Scientific Corp (BSX) Insider Trades Summary
Over the past 18 months, Stephen P Macmillan made no insider transaction in Boston Scientific Corp (BSX). Other recent insider transactions involving Boston Scientific Corp (BSX) include a net sale of 104,844 shares made by Wendy Carruthers , a net sale of 146,109 shares made by Jeffrey B. Mirviss , and a net sale of 240,229 shares made by Joseph Michael Fitzgerald .
In summary, during the past 3 months, insiders sold 119,659 shares of Boston Scientific Corp (BSX) in total and bought 0 shares, with a net sale of 119,659 shares. During the past 18 months, 1,619,066 shares of Boston Scientific Corp (BSX) were sold and 50 shares were bought by its insiders, resulting in a net sale of 1,619,016 shares.
Boston Scientific Corp (BSX)'s detailed insider trading history can be found in Insider Trading Tracker table.
Boston Scientific Corp Insider Transactions
Stephen P Macmillan Mailing Address
Above is the net worth, insider trading, and ownership report for Stephen P Macmillan. Based on the public information released on the U.S. Securities and Exchange Commission (SEC) website, Stephen P Macmillan's mailing address is: Marlborough Ma 01752.