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William Lis Insider Profile

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William Lis, CEO, Director at Portola Pharma, holds 204.45K shares in Portola Pharma (Ticker: PTLA), holds ― shares in Eidos Therapeutics (Ticker: EIDX), holds 50.44K shares in Zai Lab (Ticker: ZLAB).
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William Lis

William Lis
Portola Pharma (PTLA)
CEO, Director

Ranked #78,078 out of 108,079 Corporate Insiders

Profitable Transactions

50%
1 out of 2 Profitable Transactions

Average Return

-28.80%
Average return per transaction
Time Frame
1 Year
Compare to
No Benchmark
How are Insiders Ranked?

Insider Holdings

$926K
98.03%
1.97%
A breakdown of William Lis's holdings
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Insider Roles

Zai Lab
(ZLAB)
Director
Jasper Therapeutics
(JSPR)
Director
Roles that William Lis holds in companies
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Most Profitable Insider Trade

Stock:
Portola Pharma
(PTLA)
Rating:Informative Sell
Date:Apr 30, 2015 - Apr 30, 2016
Return:+33.40%
The most profitable trade made by William Lis
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William Lis's Trading History

Company Name
Last Transaction Date
Insider Position
Last Transaction
Last Transaction Amount
Holding Value
PTLA
Portola Pharma
Jun 08, 2018
―
Uninformative Sell
231.16K
$3.69M
EIDX
Eidos Therapeutics
―
―
―
―
ZLAB
Zai Lab
Jun 24, 2026
Director
Uninformative Sell
127.35K
$907.87K
JSPR
Jasper Therapeutics
Oct 13, 2023
Director
Uninformative Sell
6.77K
$18.25K
List of latest transactions for each holding click on a transaction to see William Lis's performance on stock
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William Lis insider profile FAQ

What is the percentage of profitable transactions made by William Lis?
The percentage of profitable transactions made by William Lis is 50%.
    What is the average return per transaction made by William Lis?
    The average return per transaction made by William Lis is -28.80%.
      What stocks does William Lis hold?
      William Lis holds: PTLA, EIDX, ZLAB, JSPR stocks.
        What was William Lis’s latest transaction?
        William Lis latest transaction was an Uninformative Sell of $231.16K.
          What was William Lis's most profitable transaction?
          William Lis’s most profitable transaction was an Informative Sell of PTLA stock on April 30, 2015. The return on the trade was 33.40%.
            What is William Lis's role in Portola Pharma?
            William Lis's role in Portola Pharma is CEO, Director.
              How can I follow the stock ratings of top corporate insiders?
              Head over to our Expert Center to see a list of the Top 100 corporate insiders and follow the corporate insiders of your choice. Visit their profiles for more details about their stock transactions and see how they perform on a stock-by-stock basis.