Summary
Updated Aug 31, 2026
Matthew M. Walsh files SEC Form 4 reports at Certara, Inc. (CERT). 7 SEC Form 4 filings on record going back to 2025, most recently on 15 May 2026. Most recent open-market trade: bought $101K of OGN on 6 May 2025. Lifetime open-market purchases: $101K.
Recent Transactions
19Every recent SEC Form 4 transaction Matthew M. Walsh has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Matthew M. Walsh go back to 2025: 7 primary Form 4 filings, an average of 3.5 per year. The typical open-market purchase is $101K (1 buy totaling $101K). The largest single buy on record is $101K of OGN in 2025. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Matthew M. Walsh 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.
- Leif E. Pedersen - $559K of CERT open-market activity in the last 12 months
- Carrie Smith Cox - $502K of OGN open-market activity in the last 12 months
- Lynette Holzbaur - $353K of OGN open-market activity in the last 12 months
- Juliana Papa Drinane - $200K of OGN open-market activity in the last 12 months
- William F. Feehery - $200K of CERT 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 Matthew M. Walsh?
Matthew M. Walsh is a corporate insider of Certara, Inc. (CERT). InsiderAlpha holds 7 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did Matthew M. Walsh last file a Form 4?
The most recent primary Form 4 on record is dated 15 May 2026, one of 7 filings going back to 2025.
Has Matthew M. Walsh been buying or selling stock?
Recorded transactions: 1 open-market purchase ($101K) and 0 open-market sales across all tracked filings.
Where can I see all of Matthew M. Walsh'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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