[MULTIPLIER] 1,000 Part II. Other information, Item 6a. Exhibit 11.1 EXHIBIT 11.1 HMT TECHNOLOGY CORPORATION STATEMENT REGARDING COMPUTATION OF NET INCOME PER SHARE (in thousands, except per share data) (Unaudited) Three Months Ended Nine Months Ended December 31, December 31, ------------------- ------------------- 1997 1996 1997 1996 --------- --------- --------- --------- Basic: Weighted average shares outstanding for the period ...................... 42,768 40,673 41,912 40,346 --------- --------- --------- --------- Shares used in computing per share amounts ....................... 42,768 44,229 41,912 44,150 ========= ========= ========= ========= Net income available for common stockholders ........................ $20,470 $13,074 $54,903 $45,574 ========= ========= ========= ========= Net income available for common stockholders per share .............. $0.48 $0.30 $1.31 $1.03 ========= ========= ========= ========= Diluted: Weighted average shares outstanding for the period ...................... 42,768 40,673 41,912 40,346 Net effect of dilutive stock options based on the treasury stock method using average market price .......... 2,647 3,556 2,885 3,804 Assumed conversion of 5 3/4% convertible subordinated notes ...... 9,684 -- 9,684 -- --------- --------- --------- --------- Shares used in computing per share amounts ............................. 55,099 44,229 54,481 44,150 ========= ========= ========= ========= Net income available for common stockholders ........................ 20,470 13,074 54,903 45,574 Add 5 3/4% convertible subordinated note interest, net of interest capitalized and income tax effect ... 1,841 -- 4,717 -- --------- --------- --------- --------- Net income available for common stockholders ........................ $22,311 $13,074 $59,620 $45,574 ========= ========= ========= ========= Net income available for common stockholders per share .............. $0.40 $0.30 $1.09 $1.03 ========= ========= ========= =========