Exhibit 11 McKESSON CORPORATION COMPUTATION OF EARNINGS PER COMMON SHARE (unaudited) (in millions except per share amounts) Three Months Ended Nine Months Ended December 31 December 31 --------------- --------------- 1995 1994 1995 1994 ---- ---- ---- ---- FULLY DILUTED EARNINGS PER SHARE Income after taxes from continuing operations $32.9 $(276.3) $97.4 $(232.8) Contribution adjustment - Series B ESOP convertible preferred stock(1) - - - (1.8) ---- ----- ---- ----- 32.9 (276.3) 97.4 (234.6) Discontinued operations - 3.0 - 21.0 Discontinued operations - gain on sale of PCS - 576.7 - 576.7 ---- ----- ---- ----- Total $32.9 $303.4 $97.4 $363.1 ==== ===== ==== ===== Fully diluted shares Common shares outstanding(2) 46.6 44.2 46.8 42.6 Convertible securities - dilutive - 1.4 - 2.5 ---- ---- ---- ---- Total 46.6 45.6 46.8 45.1 ==== ==== ==== ==== Fully diluted earnings (loss) per share Continuing operations $0.70 $(6.06) $2.08 $(5.20) Discontinued operations - 0.07 - 0.47 Discontinued operations - gain on sale of PCS - 12.64 - 12.78 ---- ----- ---- ----- Total $0.70 $ 6.65 $2.08 $ 8.05 ==== ===== ==== ===== PRIMARY EARNINGS PER SHARE Income after taxes from continuing operations $32.9 $(276.3) $97.4 $(232.8) Dividend requirements - preferred stocks(1) - - - (3.5) ---- ----- ---- ----- 32.9 (276.3) 97.4 (236.3) Discontinued operations - 3.0 - 21.0 Discontinued operations - gain on sale of PCS - 576.7 - 576.7 ---- ----- ---- ----- Total $32.9 $303.4 $97.4 $361.4 ==== ===== ==== ===== Primary shares Common shares outstanding(2) 46.6 44.2 46.7 42.6 ==== ==== ==== ==== Primary earnings (loss) per share Continuing operations $0.70 $(6.24) $2.08 $(5.55) Discontinued operations - 0.07 - 0.50 Discontinued operations - gain on sale of PCS - 13.03 - 13.54 ---- ----- ---- ----- Total $0.70 $ 6.86 $2.08 $ 8.49 ==== ===== ==== ===== (1) Net of certain tax benefits. (2) Common shares outstanding have been computed by adding the monthly averages (beginning of the month plus end of the month divided by 2), dividing the aggregate by 3 or 9, as appropriate, and adjusting this total for dilutive stock options using the treasury stock method based on the greater of the common share price at the end of the period or the average common share price during the period (fully diluted) and on the average common share price during the period (primary).