Stephen Williamson - Net Worth and Insider Trading
Stephen Williamson Net Worth
The estimated net worth of Stephen Williamson is at least $17 Million dollars as of 2025-04-25. Stephen Williamson is the Sr. VP and CFO of Thermo Fisher Scientific Inc and owns about 39,970 shares of Thermo Fisher Scientific Inc (TMO) stock worth over $17 Million. Details can be seen in Stephen Williamson'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 Williamson has not made any transactions after 2025-02-04 and currently still holds the listed stock(s). Please note that this estimate may not reflect the actual net worth.

Transaction Summary of Stephen Williamson
Stephen Williamson Insider Ownership Reports
Based on ownership reports from SEC filings, as the reporting owner, Stephen Williamson owns 2 companies in total, including Thermo Fisher Scientific Inc (TMO) , and International Flavors & Fragrances Inc (IFF) .
Click here to see the complete history of Stephen Williamson’s form 4 insider trades.
Insider Ownership Summary of Stephen Williamson
Ticker | Company | Transaction Date | Type of Owner |
---|---|---|---|
TMO | Thermo Fisher Scientific Inc | 2025-02-04 | Sr. VP and CFO |
IFF | International Flavors & Fragrances Inc | 2017-08-01 | director |
Stephen Williamson Latest Holdings Summary
Stephen Williamson currently owns a total of 1 stock. Stephen Williamson owns 39,970 shares of Thermo Fisher Scientific Inc (TMO) as of February 4, 2025, with a value of $17 Million.
Latest Holdings of Stephen Williamson
Ticker | Company | Latest Transaction Date | Shares Owned | Current Price ($) | Current Value ($) |
---|---|---|---|---|---|
TMO | Thermo Fisher Scientific Inc | 2025-02-04 | 39,970 | 424.24 | 16,956,873 |
Holding Weightings of Stephen Williamson
Stephen Williamson Form 4 Trading Tracker
According to the SEC Form 4 filings, Stephen Williamson has made a total of 7 transactions in Thermo Fisher Scientific Inc (TMO) over the past 5 years, including 0 buys and 7 sells. The most-recent trade in Thermo Fisher Scientific Inc is the sale of 19,650 shares on February 4, 2025, which brought Stephen Williamson around $12 Million.
Insider Trading History of Stephen Williamson
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Stephen Williamson Trading Performance
Stephen Williamson Ownership Network
Ownership Network List of Stephen Williamson
Ownership Network Relation of Stephen Williamson

Stephen Williamson Owned Company Details
What does Thermo Fisher Scientific Inc do?
Who are the key executives at Thermo Fisher Scientific Inc?
Stephen Williamson is the Sr. VP and CFO of Thermo Fisher Scientific Inc. Other key executives at Thermo Fisher Scientific Inc include Sr. VP and Gen. Counsel Michael A Boxer , Senior Vice President Marc N Casper , and Executive Vice President Gianluca Pettiti .
Thermo Fisher Scientific Inc (TMO) Insider Trades Summary
Over the past 18 months, Stephen Williamson made 2 insider transaction in Thermo Fisher Scientific Inc (TMO) with a net sale of 41,575. Other recent insider transactions involving Thermo Fisher Scientific Inc (TMO) include a net sale of 316,297 shares made by Marc N Casper , a net sale of 24,341 shares made by Michael A Boxer , and a net sale of 900 shares made by Gianluca Pettiti .
In summary, during the past 3 months, insiders sold 60,041 shares of Thermo Fisher Scientific Inc (TMO) in total and bought 0 shares, with a net sale of 60,041 shares. During the past 18 months, 440,422 shares of Thermo Fisher Scientific Inc (TMO) were sold and 20 shares were bought by its insiders, resulting in a net sale of 440,402 shares.
Thermo Fisher Scientific Inc (TMO)'s detailed insider trading history can be found in Insider Trading Tracker table.
Thermo Fisher Scientific Inc Insider Transactions
Stephen Williamson Mailing Address
Above is the net worth, insider trading, and ownership report for Stephen Williamson. Based on the public information released on the U.S. Securities and Exchange Commission (SEC) website, Stephen Williamson's mailing address is: Waltham Ma 02451.