Filings (90d)
Other insiders active in the same stocks
Insiders who reported open-market trades in the last 12 months at the companies Richard T. Collier 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.
- William P. Scully - $9.93M in PRTA purchases and sales in the last 12 months
- Michael John Isaacs - $71K in PRTA purchases and sales in the last 12 months
- Anne Evans Kingston - $65K in PRTA purchases and sales in the last 12 months
More insiders (A-Z)
Browse nearby insider profiles in alphabetical order.
Frequently asked questions
Who is Richard T. Collier?
Richard T. Collier is a corporate insider of PROTHENA CORP PUBLIC LTD CO (PRTA). InsiderAlpha holds 2 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did Richard T. Collier last file a Form 4?
The most recent primary Form 4 on record is dated 16 May 2026, one of 2 filings going back to 2025.