MINNEAPOLIS--(BUSINESS WIRE)--Winmark Corporation (Nasdaq: WINA) announced today that its Board of Directors has approved an increase in its regular quarterly cash dividend to shareholders. The quarterly dividend of $0.07 per share represents an increase of $0.01 from its previous dividend rate. The cash dividend will be paid on June 1, 2015 to shareholders of record on the close of business on May 13, 2015. Future dividends will be subject to Board approval. Winmark Corporation creates, suppor