X0306 4 2016-10-05 1 0000772897 HUTCHINSON TECHNOLOGY INC HTCH 0001478064 Pautz Connie L. 40 WEST HIGHLAND PARK DRIVE NE HUTCHINSON MN 55350 1 VP of Human Resources Common Stock 2016-10-05 4 D 0 5772 4.00 D 0 D Employee Stock Option (Right to Buy) 27.46 2016-10-05 4 D 0 3500 0 D 2015-11-30 Common Stock 3500 0 D Employee Stock Option (Right to Buy) 23.05 2016-10-05 4 D 0 3500 0 D 2016-11-29 Common Stock 3500 0 D Employee Stock Option (Right to Buy) 26.21 2016-10-05 4 D 0 4000 0 D 2017-11-28 Common Stock 4000 0 D Employee Stock Option (Right to Buy) 3.03 2016-10-05 4 D 0 5500 0 D 2018-12-03 Common Stock 5500 0 D Employee Stock Option (Right to Buy) 7.35 2016-10-05 4 D 0 20000 0 D 2019-12-02 Common Stock 20000 0 D Employee Stock Option (Right to Buy) 3.03 2016-10-05 4 D 0 20000 0 D 2020-12-01 Common Stock 20000 0 D Employee Stock Option (Right to Buy) 1.70 2016-10-05 4 D 0 15000 0 D 2021-11-29 Common Stock 15000 0 D Employee Stock Option (Right to Buy) 1.53 2016-10-05 4 D 0 60000 0 D 2022-12-04 Common Stock 60000 0 D Employee Stock Option (Right to Buy) 2.98 2016-10-05 4 D 0 50000 0 D 2023-12-03 Common Stock 50000 0 D Employee Stock Option (Right to Buy) 3.43 2016-10-05 4 D 0 50000 0 D 2024-12-02 Common Stock 50000 0 D Price reflects per share consideration paid pursuant to the Agreement and Plan of Merger, dated November 1, 2015 (the "Merger Agreement"), by and among Hutchinson Technology Incorporated, Headway Technologies, Inc. and Hydra Merger Sub, Inc. These stock options have either expired or have been canceled pursuant to the terms of the Merger Agreement. These stock options were canceled pursuant to the terms of the Merger Agreement. These stock options, which provided for vesting in two equal installments beginning on the first anniversary of the date of grant, were canceled pursuant to the terms of the Merger Agreement. These stock options, which provided for vesting in two equal installments beginning on the first anniversary of the date of grant, were canceled pursuant to the terms of the Merger Agreement in exchange for a cash payment of $4.00 less the per share exercise price multiplied by the number of unexercised options, without interest. These stock options, which provided for vesting in two equal installments beginning on the first anniversary of the date of grant, were canceled pursuant to the terms of the Merger Agreement. These stock options, which provided for vesting in two equal installments beginning on the first anniversary of the date of grant, were canceled pursuant to the terms of the Merger Agreement in exchange for a cash payment of $4.00 less the per share exercise price multiplied by the number of unexercised options, without interest. These stock options, which provided for vesting in three equal installments beginning on the first anniversary of the date of grant, were canceled pursuant to the terms of the Merger Agreement in exchange for a cash payment of $4.00 less the per share exercise price multiplied by the number of unexercised options, without interest. These stock options, which provided for vesting in three equal installments beginning on the first anniversary of the date of grant, were canceled pursuant to the terms of the Merger Agreement in exchange for a cash payment of $4.00 less the per share exercise price multiplied by the number of unexercised options, without interest. These stock options, which provided for vesting in three equal installments beginning on the first anniversary of the date of grant, were canceled pursuant to the terms of the Merger Agreement in exchange for a cash payment of $4.00 less the per share exercise price multiplied by the number of unexercised options, without interest. These stock options, which provided for vesting in three equal installments beginning on the first anniversary of the date of grant, were canceled pursuant to the terms of the Merger Agreement in exchange for a cash payment of $4.00 less the per share exercise price multiplied by the number of unexercised options, without interest. This Amendment on Form 4/A corrects the footnote describing the vesting schedule for the option shares granted on November 29, 2011. /s/ Peggy Steif Abram, attorney-in-fact 2016-10-05