Career & Filing History
Every role John Mazarakis has reported on a Form 4, reconstructed from the filings themselves. Reporting insiders must state their relationship to the issuer (officer title, director seat, or 10% ownership) on every filing.
John Mazarakis is Executive Chairman at Chicago Atlantic Real Estate Finance, Inc. (REFI). SEC records also connect Mazarakis to Vireo Growth Inc. (VREOF). Mazarakis has reported 5 insider filings with the SEC since 2024. The most recent filing was in April 2026.
Every role John Mazarakis has reported on a Form 4, reconstructed from the filings themselves. Reporting insiders must state their relationship to the issuer (officer title, director seat, or 10% ownership) on every filing.
Chicago Atlantic Real Estate Finance, Inc. (REFI)3 filingsChicago Atlantic BDC, Inc. (LIEN)1 filingUpdated Aug 30, 2026
John Mazarakis is Executive Chairman, Director of Chicago Atlantic Real Estate Finance, Inc. (REFI). 9 SEC Form 4 filings on record going back to 2024, most recently on 28 August 2026. Most recent open-market trade: bought $80K of REFI on 28 August 2026. Lifetime open-market purchases: $1.57M. Lifetime open-market sales: $44K. Historical track record: 4/5 stars across 3 tracked purchases.
Every recent SEC Form 4 transaction John Mazarakis has reported, most recent first.
InsiderAlpha computes a forward-return-based score for every insider with enough Form 4 purchase history. The metrics below reflect realized performance after each tracked open-market purchase.
| Metric | Value |
|---|---|
| InsiderAlpha rating | ★★★★☆ (4/5) |
| Total purchases tracked | 3 |
| Purchases with forward-return data | 3 |
| 30-day win rate | 100% |
| 90-day win rate | 67% |
| Avg 5-day return | +1.18% |
| Avg 30-day return | +1.52% |
| Avg 90-day return | +0.46% |
| Best 30-day return |
InsiderAlpha's records for John Mazarakis go back to 2024: 9 primary Form 4 filings, an average of 3.0 per year. The typical open-market purchase is $197K (8 buys totaling $1.57M). The largest single buy on record is $566K of LIEN in 2026. Sales side: 1 recorded sale totaling $44K, so the filing history runs buy-heavy by dollar value. 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.
Insiders who reported open-market trades in the last 12 months at the companies John Mazarakis 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.
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
John Mazarakis is a corporate insider, tracked as Executive Chairman, Director of Chicago Atlantic Real Estate Finance, Inc. (REFI). InsiderAlpha holds 9 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
4 primary Form 4 filings in the last 90 days, covering 2 companies.
Recorded transactions: 8 open-market purchases ($1.57M) and 1 open-market sale ($44K) across all tracked filings.
Across 3 tracked purchases, John Mazarakis averaged +1.5% avg 30-day return with a 100% 30-day win rate. InsiderAlpha rates the track record at 4/5 stars.
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.
A free account opens the full scored daily plan and every past day, a watchlist for any ticker, and 3 months of price history on every company page. No card.
Free plan available · Paid plans start with a 7-day free trial
$REFI Chicago Atlantic Real Estate Finance, Inc.145 shares @ $10.67$2K
| +2.34% |