Summary
Updated Aug 31, 2026
Eric D. Shaff is Director of Seres Therapeutics, Inc. (MCRB). 8 SEC Form 4 filings on record going back to 2024, most recently on 18 August 2026. Most recent open-market trade: sold $1K of MCRB on 18 August 2026. Lifetime open-market sales: $20K.
Recent Transactions
16Every recent SEC Form 4 transaction Eric D. Shaff has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Eric D. Shaff go back to 2024: 8 primary Form 4 filings, an average of 2.7 per year. 23 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 Eric D. Shaff 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.
- Matthew R. Henn - $23K of MCRB open-market activity in the last 12 months
- Teresa L. Young - $19K of MCRB open-market activity in the last 12 months
- Thomas Desrosier - $3K of MCRB open-market activity in the last 12 months
- Kelly Brady - $735 of MCRB 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 Eric D. Shaff?
Eric D. Shaff is a corporate insider, tracked as Director of Seres Therapeutics, Inc. (MCRB). InsiderAlpha holds 8 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Eric D. Shaff submitted recently?
2 primary Form 4 filings in the last 90 days, covering 1 company.
Has Eric D. Shaff been buying or selling stock?
Recorded transactions: 0 open-market purchases and 7 open-market sales ($20K) across all tracked filings.
Where can I see all of Eric D. Shaff'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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