James Topper, Director at Sierra Oncology, holds 6.83M shares in NewAmsterdam Pharma Company (Ticker: NAMS), holds 5.93M shares in Phathom Pharmaceuticals (Ticker: PHAT), holds 0.00 shares in Alpine Immune Sciences (Ticker: ALPN). Most recently, James Topper Bought ― shares of NewAmsterdam Pharma Company on Jun 26, 2025 for an estimated value of 69.45K.
James Topper latest transaction was an Informative Buy of $69.45K.
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 152.20%.
What is James Topper's role in Sierra Oncology?
James Topper's role in Sierra Oncology is Director.
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