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William Lewis Insider Profile
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William Lewis, Chair and CEO, Director at Insmed, holds 599.83K shares in Insmed (Ticker: INSM), holds ― shares in uniQure (Ticker: QURE), holds 6.96K shares in NewAmsterdam Pharma Company (Ticker: NAMS). Most recently, William Lewis Sold ― shares of Insmed on Jan 08, 2026 for an estimated value of $1.68M.
Profitable Transactions
4 out of 14 Profitable Transactions
Average Return
-57.40%
Average return per transaction
Time Frame
Compare to
Insider Holdings
Insider Roles
Roles that William Lewis holds in companies
Most Profitable Insider Trade
The most profitable trade made by William Lewis
William Lewis's Trading History
Insmed
Jan 08, 2026
Chair and CEO, Director
Informative Sell
1.68M
$105.57M
uniQure
―
Director
―
―
NewAmsterdam Pharma Company
Jan 08, 2025
Director
Uninformative Buy
―
$246.73K
Aegerion
Oct 27, 2010
―
Informative Buy
266.05K
$813.14K
List of latest transactions for each holding click on a transaction to see William Lewis's performance on stock
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William Lewis insider profile FAQ
What is the percentage of profitable transactions made by William Lewis?
The percentage of profitable transactions made by William Lewis is 29%.
What is the average return per transaction made by William Lewis?
The average return per transaction made by William Lewis is -57.40%.
What stocks does William Lewis hold?
William Lewis holds: INSM, QURE, NAMS, AEGR stocks.
What was William Lewis’s latest transaction?
William Lewis latest transaction was an Informative Sell of $1.68M.
What was William Lewis's most profitable transaction?
William Lewis’s most profitable transaction was an Informative Buy of INSM stock on November 2, 2018. The return on the trade was 56.70%.
What is William Lewis's role in Insmed?
William Lewis's role in Insmed is Chair and CEO, Director.
How can I follow the stock ratings of top corporate insiders?
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