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James Topper Insider Profile

39 Followers

James Topper, Director, Ten Percent Owner at Phathom Pharmaceuticals, holds 5.96M shares in Phathom Pharmaceuticals (Ticker: PHAT), holds 6.83M shares in NewAmsterdam Pharma Company (Ticker: NAMS), holds 0.00 shares in Alpine Immune Sciences (Ticker: ALPN).

James Topper's Trading History

PHATPhathom Pharmaceuticals		May 21, 2026Director, Ten Percent OwnerUninformative Buy―$34.20M
NAMSNewAmsterdam Pharma Company		Sep 17, 2025DirectorInformative Buy15.64K$137.00M
ALPNAlpine Immune Sciences		May 20, 2024―Uninformative Sell―$0.00
ANABAnaptysBio		Nov 18, 2020Director, Ten Percent OwnerUninformative Buy―$47.34M
ETTXEntasis Therapeutics Holdings		Oct 02, 2018―Uninformative Buy―$2.96M
APTXAptinyx		Jun 26, 2018―Uninformative Buy―$306.25K
SRRASierra Oncology		Feb 16, 2017―Informative Buy8.00M―
PTLAPortola Pharma		May 28, 2013―Uninformative Buy―$25.76M
LJPCLa Jolla Pharma		Feb 26, 2009―Informative Sell341.42K$0.00
FOLDAmicus		―――$51.01M
ALNAQAllena Pharmaceuticals		――――
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James Topper insider profile FAQ

What is the percentage of profitable transactions made by James Topper?
The percentage of profitable transactions made by James Topper is 60%.
What is the average return per transaction made by James Topper?
The average return per transaction made by James Topper is 54.50%.
What stocks does James Topper hold?
James Topper holds: PHAT, PTLA, ALPN, SRRA, ANAB, ALNAQ, APTX, ETTX, NAMS, FOLD, LJPC stocks.
What was James Topper's most profitable transaction?
James Topper’s most profitable transaction was an Informative Buy of PHAT stock on May 13, 2025. The return on the trade was 279.40%.
What is James Topper's role in Phathom Pharmaceuticals?
James Topper's role in Phathom Pharmaceuticals is Director, Ten Percent Owner.
How can I follow the stock ratings of top corporate insiders?
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