Summary
Updated Aug 31, 2026
George Massaro is Director of CHARLES RIVER LABORATORIES INTERNATIONAL, INC. (CRL). 2 SEC Form 4 filings on record, most recently on 15 May 2025. Most recent open-market trade: sold $3K of CRL on 15 May 2025. Lifetime open-market sales: $39K.
Recent Transactions
8Every recent SEC Form 4 transaction George Massaro has reported, most recent first.
Trading Pattern
InsiderAlpha's records for George Massaro go back to 2025: 2 primary Form 4 filings, an average of 1.0 per year. 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 George Massaro 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.
- James C. Foster - $34.84M of CRL open-market activity in the last 12 months
- Shannon M. Parisotto - $2.97M of CRL open-market activity in the last 12 months
- Birgit Girshick - $1.82M of CRL open-market activity in the last 12 months
- Michael Gunnar Knell - $1.73M of CRL open-market activity in the last 12 months
- Victoria L. Creamer - $1.08M of CRL open-market activity in the last 12 months
- Nancy C. Andrews - $163K of CRL 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 George Massaro?
George Massaro is a corporate insider, tracked as Director of CHARLES RIVER LABORATORIES INTERNATIONAL, INC. (CRL). InsiderAlpha holds 2 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did George Massaro last file a Form 4?
The most recent primary Form 4 on record is dated 15 May 2025, one of 2 filings going back to 2025.
Has George Massaro been buying or selling stock?
Recorded transactions: 0 open-market purchases and 8 open-market sales ($39K) across all tracked filings.
Where can I see all of George Massaro'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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