Winmark Corporation
Last updated September 27, 2026
Organization details
- Legal name
- Winmark Corporation
- Former names
- Grow BIZ International Inc
- Ownership
- Public
- Status
- Active
- SIC code
- 5900 — Retail-Miscellaneous Retail
- Jurisdiction of incorporation
- Minnesota
- Headquarters city
- Minneapolis
- Headquarters state / province
- Minnesota
- Headquarters country
- United States
- Fiscal year end
- December
- Ticker symbol
- WINA
- Primary stock exchange
- Nasdaq
Identifiers
- SEC CIK
- 0000908315
- EIN
- 41-1622691
- Wikidata ID
- Q28048853
Board of directors
-
Amy C. Becker · DirectorSince 2023
-
Brett D. Heffes · Director · CHAIR AND CEOSince 2023
-
Gina Decaro Sprenger · DirectorSince 2023
-
Jenele C. Grassle · DirectorSince 2023
-
Keith Credendino · DirectorSince 2025
-
Lawrence A. Barbetta · DirectorSince 2023
-
Mark L. Wilson · DirectorSince 2023
-
Paul C. Reyelts · DirectorSince 2023
-
Percy C. Tomlinson Jr. · DirectorSince 2023
-
Philip Irving Smith · DirectorSince 2023
-
Stephanie S. Hoppe · DirectorSince 2026
Chief executives
Brett D. Heffes
· CHAIRMAN AND CEO
Dates unknown
Director election results
Annual meeting of April 22, 2026. Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.
-
97.7%
-
97.7%
-
98.1%
-
98.1%
-
98.3%
-
98.3%
-
98.4%
Board connections
1 of this board's directors also sit on 1 other board.
- via Philip Irving Smith
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
- Bought, last 12 months
- $0
- 0 purchases by 0 insiders
- Sold, last 12 months
- $4,130,706
- 5 sales by 3 insiders
| Date | Insider | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| Jul 1, 2026 | Percy C. Tomlinson Jr. Director | Option exercise | +3,500 | $242.58 | $849,030 |
| Jul 1, 2026 | Percy C. Tomlinson Jr. Director | Option exercise | +200 | $197.80 | $39,560 |
| Apr 30, 2026 | Ishaug Anthony D Officer (CHIEF FINANCIAL OFFICER) | Option exercise | +3,293 | $98.25 | $323,537 |
| Apr 28, 2026 | Gaudette Renae M. Officer (CHIEF OPERATING OFFICER) | Option exercise | +2,500 | $98.25 | $245,625 |
| Mar 4, 2026 | Jenele C. Grassle Director | Open-market sale | −3,900 | $475.80 | $1,855,620 |
| Mar 3, 2026 | Percy C. Tomlinson Jr. Director | Open-market sale | −1,660 | $460.52 | $764,463 |
| Feb 26, 2026 | Percy C. Tomlinson Jr. Director | Option exercise | +1,600 | $242.58 | $388,128 |
| Feb 26, 2026 | Percy C. Tomlinson Jr. Director | Option exercise | +60 | $197.80 | $11,868 |
| Feb 25, 2026 | Jenele C. Grassle Director | Option exercise | +800 | $134.25 | $107,400 |
| Feb 25, 2026 | Jenele C. Grassle Director | Option exercise | +800 | $143.20 | $114,560 |
| Feb 25, 2026 | Jenele C. Grassle Director | Option exercise | +800 | $156.00 | $124,800 |
| Feb 25, 2026 | Jenele C. Grassle Director | Option exercise | +750 | $164.84 | $123,630 |
| Feb 25, 2026 | Jenele C. Grassle Director | Option exercise | +750 | $176.20 | $132,150 |
| Nov 21, 2025 | Jenele C. Grassle Director | Open-market sale | −2,400 | $420.87 | $1,010,088 |
| Nov 19, 2025 | Jenele C. Grassle Director | Option exercise | +800 | $98.25 | $78,600 |
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