Summary
Updated Aug 31, 2026
Brian Robb Douglass is CHIEF PRODUCT OFFICER of REPLIGEN CORP (RGEN). 3 SEC Form 4 filings on record, most recently on 8 May 2026.
Recent Transactions
3Every recent SEC Form 4 transaction Brian Robb Douglass has reported, most recent first.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Brian Robb Douglass 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.
- Anthony Hunt - $10.52M of RGEN open-market activity in the last 12 months
- Olivier Loeillot - $2.71M of RGEN open-market activity in the last 12 months
- James Bylund - $331K of RGEN open-market activity in the last 12 months
- Jason K. Garland - $186K of RGEN open-market activity in the last 12 months
- Karen A. Dawes - $44K of RGEN open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is Brian Robb Douglass?
Brian Robb Douglass is a corporate insider, tracked as CHIEF PRODUCT OFFICER of REPLIGEN CORP (RGEN). InsiderAlpha holds 3 primary Form 4 filings for them, the earliest from 2026, updated as new SEC EDGAR filings are processed.
When did Brian Robb Douglass last file a Form 4?
The most recent primary Form 4 on record is dated 8 May 2026, one of 3 filings going back to 2026.
Where can I see all of Brian Robb Douglass's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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