Summary
Updated Aug 31, 2026
John L. Berisford is Director of COSTAR GROUP, INC. (CSGP). 4 SEC Form 4 filings on record going back to 2025, most recently on 25 June 2026.
Recent Transactions
4Every recent SEC Form 4 transaction John L. Berisford has reported, most recent first.
Trading Pattern
InsiderAlpha's records for John L. Berisford go back to 2025: 4 primary Form 4 filings, an average of 2.0 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 John L. Berisford 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.
- Andrew C. Florance - $7.48M of CSGP open-market activity in the last 12 months
- Frederick G. Saint - $907K of CSGP open-market activity in the last 12 months
- Cynthia Cammett Cann - $274K of CSGP open-market activity in the last 12 months
- John W. Hill - $260K of CSGP open-market activity in the last 12 months
- Louise S. Sams - $48K of CSGP open-market activity in the last 12 months
- Rachel C. Glaser - $45K of CSGP 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 John L. Berisford?
John L. Berisford is a corporate insider, tracked as Director of COSTAR GROUP, INC. (CSGP). InsiderAlpha holds 4 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has John L. Berisford submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Where can I see all of John L. Berisford'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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