Summary
Updated Aug 31, 2026
Karen A. Foster is Chief Quality and Operations of BIOLIFE SOLUTIONS INC (BLFS). 13 SEC Form 4 filings on record going back to 2024, most recently on 31 March 2026. Most recent open-market trade: sold $49K of BLFS on 31 March 2026. Lifetime open-market sales: $2.09M.
Recent Transactions
15Every recent SEC Form 4 transaction Karen A. Foster has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Karen A. Foster go back to 2024: 13 primary Form 4 filings, an average of 4.3 per year. 7 recorded transactions carry a Rule 10b5-1 flag, meaning they were pre-scheduled under a written trading plan rather than discretionary.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Karen A. Foster 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.
- Casdin Partners Master Fund, L.P. - $49.54M of BLFS open-market activity in the last 12 months
- Greef Roderick de - $3.61M of BLFS open-market activity in the last 12 months
- Troy Wichterman - $850K of BLFS open-market activity in the last 12 months
- Amy Duross - $257K of BLFS open-market activity in the last 12 months
- Aby J. Mathew - $56K of BLFS open-market activity in the last 12 months
- Joydeep Goswami - $48K of BLFS 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 Karen A. Foster?
Karen A. Foster is a corporate insider, tracked as Chief Quality and Operations of BIOLIFE SOLUTIONS INC (BLFS). InsiderAlpha holds 13 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did Karen A. Foster last file a Form 4?
The most recent primary Form 4 on record is dated 31 March 2026, one of 13 filings going back to 2024.
Has Karen A. Foster been buying or selling stock?
Recorded transactions: 0 open-market purchases and 12 open-market sales ($2.09M) across all tracked filings.
Where can I see all of Karen A. Foster'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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