X0306 4 2013-07-17 0000739608 PENFORD CORP PENX 0001190380 MALKOSKI THOMAS D C/O PENFORD CORPORATION 7094 S. REVERE PARKWAY CENTENNIAL CO 80112-3932 1 1 Pres. & CEO Common Stock 2013-07-17 4 M 0 50000.0000 12.7900 A 108371.0000 D Common Stock 2013-07-17 4 F 0 43996.0000 15.5500 D 64375.0000 D Common Stock 2712.7524 I 401(k) plan NQ Stock Option (Right to Buy) 12.7900 2013-07-17 4 M 0 50000.0000 0.0000 D 2004-08-22 2013-08-22 Common Stock 50000.0000 0.0000 D Mr. Malkoski increased his stock ownership from 58,371 shares to 64,375 shares in connection with the option exercise. As part of the option exercise, shares were withheld to satisfy the option exercise price and the minimum tax withholding obligations. Estimate of shares held within the 401(k) plan on the reporting person's behalf based on the 401(k) Penford stock fund balance divided by the stock closing price on August 31, 2012. It should be noted that the 401(k) Penford stock fund generally contains some cash and therefore is not fully invested in Penford stock. The option becomes exercisable in four equal installments beginning on the first anniversary from date of grant; the first anniversary date is indicated above as the Date Exercisable. Margaret Von der Schmidt as Attorney-in-Fact 2013-07-17