X0306 4 2017-02-21 0001303942 BankFinancial CORP BFIN 0001308190 Gasior F Morgan 15W060 NORTH FRONTAGE ROAD BURR RIDGE IL 60527 1 1 Chairman, CEO & President Common Stock 2017-02-21 4 M 0 150000 11.99 A 275380 D Common Stock 2017-02-21 4 F 0 134439 14.79 D 140941 D Common Stock 46109.5856 I By 401k Common Stock 16137.2178 I By Employee Stock Ownership Plan Common Stock 2500 I By spouse's IRA Common Stock 122500 I By spouse's trust Stock Options (Rights to Buy) 11.99 2017-02-21 4 M 0 150000 0 D 2017-06-26 Common Stock 150000 50000 D The information in this report is based on the 401(k) report dated February 14, 2017. Reflects ESOP allocations that occurred as of December 31, 2015. The reporting person disclaims beneficial ownership of these securities, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose. Stock Option Awards granted pursuant to the 2006 Equity Incentive Plan of BankFinancial Corporation vest ratably over four quarterly installments commencing September 30, 2015. /s/ F. Morgan Gasior 2017-02-23