🕵️ Winmark Corp ($WINA)
SEC insider & ownership activity, last 12 months · CIK 908315 · every row links its SEC filing
Over the last 12 months insiders sold $7.9M against $103K of open-market buying. Brett D. Heffes sold $3.4M (Aug). 1 planned sale is pending, the largest $525K (Jenele C. Grassle). No red-flag 8-Ks in the window.
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Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
1 buyer, $103K (1 lots) · 5 sellers, $7.9M (15 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Brett D. Heffes | 0 | – | 8 | $3.4M | Aug 27, 2025 |
| Jenele C. Grassle | 0 | – | 2 | $2.9M | Mar 4, 2026 |
| Percy C. Tomlinson Jr. | 0 | – | 1 | $764K | Mar 3, 2026 |
| Renae M. Gaudette | 0 | – | 2 | $501K | Oct 24, 2025 |
| Lawrence A. Barbetta | 0 | – | 2 | $430K | Sep 17, 2025 |
| Sprenger Gina Decaro | 1 | $103K | 0 | – | Aug 13, 2025 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Blackrock, Inc. | 12.1% | 13G | Feb 6, 2026 | filing ↗ | |
| Renaissance Technologies LLC | 6.2% | 13G | Aug 13, 2025 | filing ↗ | |
| Renaissance Technologies Holdings Corporation | 6.2% | 13G | Aug 13, 2025 | filing ↗ | |
| First Trust Portfolios L.P. | 5.3% | 13G | Jul 27, 2026 | filing ↗ | |
| First Trust Advisors L.P. | 5.3% | 13G | Jul 27, 2026 | filing ↗ | |
| The Charger Corporation | 5.3% | 13G | Jul 27, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Jenele C. Grassle | $525K | Jul 14, 2026 | filing ↗ |
| Jenele C. Grassle | $1.1M | May 7, 2026 | filing ↗ |
| Jenele C. Grassle | $1.9M | Mar 4, 2026 | filing ↗ |
| Tomlinson Family REV TR DTD 8/25/16 | $752K | Mar 3, 2026 | filing ↗ |
| Jenele C. Grassle | $1.0M | Nov 21, 2025 | filing ↗ |
| Renae Gaudette | $500K | Oct 24, 2025 | filing ↗ |
| Lawrence A. Barbetta | $430K | Sep 17, 2025 | filing ↗ |
| Brett D. Heffes | $2.2M | Aug 27, 2025 | filing ↗ |
| Brett D. Heffes | $1.1M | Aug 26, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Earnings (2.02) | Jul 15, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jul 15, 2026 | filing ↗ |
| Other events (8.01) | Jul 15, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 15, 2026 | filing ↗ |
| Officer/director changes (5.02) | May 5, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 5, 2026 | filing ↗ |
| Shareholder vote (5.07) | Apr 22, 2026 | filing ↗ |
| Earnings (2.02) | Apr 15, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Apr 15, 2026 | filing ↗ |
| Other events (8.01) | Apr 15, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 15, 2026 | filing ↗ |
| Other events (8.01) | Mar 16, 2026 | filing ↗ |
| Earnings (2.02) | Feb 18, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Feb 18, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 18, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jan 28, 2026 | filing ↗ |
| Other events (8.01) | Jan 28, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 28, 2026 | filing ↗ |
| Earnings (2.02) | Oct 15, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Oct 15, 2025 | filing ↗ |
| Other events (8.01) | Oct 15, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 15, 2025 | filing ↗ |
| Officer/director changes (5.02) | Aug 6, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 6, 2025 | filing ↗ |