Exhibit 11.01 Hologic, Inc. and Subsidiaries Statement RE: Computation of Earnings Per Share Fiscal years ended PRIMARY: September 30, September 28, September 27 1995 1996 1997 ---- ---- ---- Net income $ 3,348,256 $11,356,866 $17,729,149 =========== =========== =========== Weighted average number of common shares outstanding 9,201,947 11,698,371 12,985,948 Common stock equivalents outstanding pursuant to treasury stock method 628,690 825,612 685,946 ----------- ----------- ----------- Weighted average number of common and common equivalent shares outstanding 9,830,637 12,523,983 13,671,894 =========== =========== =========== Per share amount $ 0.34 $ 0.91 $ 1.30 =========== =========== =========== FULLY DILUTED: Net income $ 3,348,256 -- -- ----------- ----------- ----------- Weighted average number of common shares outstanding 9,201,947 -- -- Common stock equivalents outstanding pursuant to treasury stock method 1,027,782 -- -- ----------- ----------- ----------- Weighted average number of common and common equivalent shares outstanding 10,229,729 -- -- =========== =========== =========== Per share amount $ 0.33 -- -- =========== =========== ===========