Prosperity Bancshares Inc. (NYSE:PB) announces a share repurchase program. Under the program, the company will repurchase up to 3,470,000 shares, representing 5% of its outstanding common stock. Any repurchased shares will be held by the company as authorized but unissued shares. The share repurchase program will run over a two-year period expiring on January 16, 2020, at the discretion of management.