HUTCHINSON TECHNOLOGY INCORPORATED STATEMENT REGARDING COMPUTATION OF PER SHARE EARNINGS- UNAUDITED (In thousands, except per share data) Thirteen Weeks Ended Thirty-Nine Weeks Ended ----------------------- ----------------------- June 28, June 29, June 28, June 29, 1998 1997 1998 1997 -------- -------- -------- -------- NET INCOME (LOSS) ($9,250) $13,698 ($35,149) $41,498 -------- -------- -------- -------- -------- -------- -------- -------- NET INCOME (LOSS) PER SHARE - BASIC: Weighted average common shares outstanding 19,755 19,531 19,686 17,834 -------- -------- -------- -------- BASIC NET INCOME (LOSS) PER SHARE ($0.47) $0.70 ($1.79) $2.33 -------- -------- -------- -------- -------- -------- -------- -------- NET INCOME (LOSS) PER SHARE - DILUTED: Weighted average common shares outstanding 19,755 19,531 19,686 17,834 Dilutive effect of stock options outstanding after application of treasury stock method - 745 - 692 -------- -------- -------- -------- 19,755 20,276 19,686 18,526 -------- -------- -------- -------- -------- -------- -------- -------- DILUTED NET INCOME (LOSS) PER SHARE ($0.47) $0.68 ($1.79) $2.24 -------- -------- -------- -------- -------- -------- -------- --------