Not enough buy signals with a settled T+90 horizon to measure a track record yet.
Signal history
Explore the full record of transactions filed by Topper James N. Insider active across 3 companies, notably Phathom Pharmaceuticals, Inc.. In total, 15 reports have been recorded. Split: 9 buys · 0 sell. Total volume traded: €577k. History available since 25 May 2023. The latest transaction was disclosed on 11 August 2025 (Acquisition). Regulator: SEC (Form 4). All data is openly available.
Companies and markets linked to Topper James N
Open company profiles for insider transactions, fundamentals and analyst consensus when available.
Topper James N is a director at Phathom Pharmaceuticals, Inc., NewAmsterdam Pharma Co N.V. and Alpine Immune Sciences, INC. He has 11 filings in total, and across the 11 sampled filings between 2023-05-30 and 2025-05-23, buys total 382174 EUR and sells total 0 EUR, with Acquisition as the modal transaction nature.