Winmark Corporation

Last updated September 27, 2026

Organization details

Legal name
Winmark Corporation
Former names
Grow BIZ International Inc
Ownership
Public
Status
Active
Sector (GICS)
Consumer Discretionary
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

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.

Board connections

1 of this board's directors also sit on 1 other board.

Network of Winmark Corporation's board connections Park Dental Partners Inc. Park Dental Partners I... Philip Irving Smith Philip Irving Smith Winmark Corporation
Shared director Other board Same sector

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
$3,630,171
3 sales by 2 insiders
Date Insider Transaction Shares Price Value
Nov 4, 2026 Ishaug Anthony D Officer (CHIEF FINANCIAL OFFICER) Option exercise +3,800 $125.50 $476,900
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

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Questions about Winmark Corporation

Who is the CEO of Winmark Corporation?

Brett D. Heffes is Winmark Corporation's CHAIRMAN AND CEO.

How many directors are on Winmark Corporation's board?

Winmark Corporation's board has 11 directors: Amy C. Becker, Brett D. Heffes, Gina Decaro Sprenger, Jenele C. Grassle, Keith Credendino, Lawrence A. Barbetta, Mark L. Wilson, Paul C. Reyelts, Percy C. Tomlinson Jr., Philip Irving Smith and 1 other.

Are Winmark Corporation insiders buying or selling shares?

Over the last 12 months, Winmark Corporation insiders made no open-market purchases and sold $3.6 million of shares in 3 sales on the open market, as reported to the SEC on Forms 4 and 5.

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