Other insiders active in the same stocks
Insiders who reported open-market trades in the last 12 months at the companies James N. Topper files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Michael H. Davidson - $25.55M in NAMS purchases and sales in the last 12 months
- Louise Frederika Kooij - $16.75M in NAMS purchases and sales in the last 12 months
- Johannes Jacob Pieter Kastelein - $15.52M in NAMS purchases and sales in the last 12 months
- Mayur Ian Somaiya - $3.43M in NAMS purchases and sales in the last 12 months
- Louis G. Lange - $2.19M in NAMS purchases and sales in the last 12 months
- John W. Smither - $41K in NAMS purchases and sales in the last 12 months
More insiders (A-Z)
Browse nearby insider profiles in alphabetical order.
Frequently asked questions
Who is James N. Topper?
James N. Topper is a corporate insider of Phathom Pharmaceuticals, Inc. (PHAT). InsiderAlpha holds 4 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did James N. Topper last file a Form 4?
The most recent primary Form 4 on record is dated 21 May 2026, one of 4 filings going back to 2025.
Has James N. Topper been buying or selling stock?
Recorded transactions: 3 open-market purchases ($58K) and 0 open-market sales across all tracked filings.
