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William Waddill Insider Profile

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William Waddill, Director at Protagonist Therapeutics, holds 7.83K shares in Protagonist Therapeutics (Ticker: PTGX), holds ― shares in Annexon Biosciences (Ticker: ANNX), holds ― shares in Turnstone Biologics Corp. (Ticker: TSBX).
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William Waddill

William Waddill
Protagonist Therapeutics (PTGX)
Director

Ranked #105,767 out of 108,921 Corporate Insiders

Profitable Transactions

11%
1 out of 9 Profitable Transactions

Average Return

-74.90%
Average return per transaction
Time Frame
1 Year
Compare to
No Benchmark
How are Insiders Ranked?

Insider Holdings

$6M
80.83%
19.17%
0.00%
A breakdown of William Waddill's holdings
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Insider Roles

Arrowhead Pharmaceuticals
(ARWR)
Director
Protagonist Therapeutics
(PTGX)
Director
Annexon Biosciences
(ANNX)
Director
Roles that William Waddill holds in companies
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Most Profitable Insider Trade

Stock:
Arrowhead Pharmaceuticals
(ARWR)
Rating:Informative Sell
Date:Jan 05, 2021 - Jan 05, 2022
Return:+17.10%
The most profitable trade made by William Waddill
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William Waddill's Trading History

Company Name
Last Transaction Date
Insider Position
Last Transaction
Last Transaction Amount
Holding Value
PTGX
Protagonist Therapeutics
Jun 25, 2026
Director
Uninformative Buy
148.86K
$1.14M
ANNX
Annexon Biosciences
―
Director
―
―
TSBX
Turnstone Biologics Corp.
―
―
―
―
CALA
Calithera Bio
Oct 03, 2016
―
Uninformative Sell
―
$794.92
ARWR
Arrowhead Pharmaceuticals
Dec 23, 2025
Director
Uninformative Sell
566.04K
$4.81M
OMED
OncoMed Pharma
Jul 23, 2013
―
Uninformative Buy
―
$26.48K
List of latest transactions for each holding click on a transaction to see William Waddill's performance on stock
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William Waddill insider profile FAQ

What is the percentage of profitable transactions made by William Waddill?
The percentage of profitable transactions made by William Waddill is 11%.
    What is the average return per transaction made by William Waddill?
    The average return per transaction made by William Waddill is -74.90%.
      What stocks does William Waddill hold?
      William Waddill holds: PTGX, ANNX, TSBX, CALA, ARWR, OMED stocks.
        What was William Waddill’s latest transaction?
        William Waddill latest transaction was an Uninformative Buy of $148.86K.
          What was William Waddill's most profitable transaction?
          William Waddill’s most profitable transaction was an Informative Sell of ARWR stock on January 5, 2021. The return on the trade was 17.10%.
            What is William Waddill's role in Protagonist Therapeutics?
            William Waddill's role in Protagonist Therapeutics is 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.