Summary
Updated Aug 30, 2026
Peter Sack is Co-Chief Executive Officer, Director of Chicago Atlantic Real Estate Finance, Inc. (REFI). 5 SEC Form 4 filings on record going back to 2025, most recently on 21 August 2026. Most recent open-market trade: bought $21K of REFI on 21 August 2026. Lifetime open-market purchases: $169K. Historical track record: 3/5 stars across 3 tracked purchases.
Recent Transactions
7Every recent SEC Form 4 transaction Peter Sack has reported, most recent first.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Peter Sack 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.
- John Mazarakis - $962K of REFI open-market activity in the last 12 months
- Anthony Cappell - $468K of REFI open-market activity in the last 12 months
- Jason D. Papastavrou - $228K of REFI open-market activity in the last 12 months
- Brandon Konigsberg - $86K of REFI open-market activity in the last 12 months
- David Kite - $63K of REFI 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 Peter Sack?
Peter Sack is a corporate insider, tracked as Co-Chief Executive Officer, Director of Chicago Atlantic Real Estate Finance, Inc. (REFI). InsiderAlpha holds 5 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 Peter Sack submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Peter Sack been buying or selling stock?
Recorded transactions: 6 open-market purchases ($169K) and 0 open-market sales across all tracked filings.
How accurate is Peter Sack's historical track record?
Across 3 tracked purchases, Peter Sack averaged +0.2% avg 30-day return with a 67% 30-day win rate. InsiderAlpha rates the track record at 3/5 stars.
Where can I see all of Peter Sack'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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