MAGELLAN HEALTH SERVICES, INC. AND SUBSIDIARIES EXHIBIT 11 COMPUTATION OF PER SHARE EARNINGS Three Months Three Months Six Months Six Months Ended Ended Ended Ended March 31, 1995 March 31, 1996 March 31, 1995 March 31, 1996 -------------- -------------- -------------- -------------- (in thousands, except per share data) Net income(loss) $ (15,100) $ 20,069 $ (14,751) $ 29,817 ============= ============= ============== ============== Weighted average number of common shares outstanding: Common shares outstanding 28,332 31,247 27,613 29,612 Stock Options and Rights - 615 - 468 Warrants - 20 - 19 ------------- ------------- -------------- -------------- 28,332 31,882 27,613 30,099 ============= ============= ============== ============== Primary earnings(loss) per share $ (0.53) $ 0.63 $ (0.53) $ 0.99 ============= ============= ============== ============== Net income(loss) $ (15,100) $ 20,069 $ (14,751) $ 29,817 Adjustments for the assumed conversion of the Exchange Option: Minority interest - 811 - 1,082 Amortization - (276) - (341) ------------- ------------ -------------- -------------- Adjusted net income $ (15,100) $ 20,604 $ (14,751) $ 30,558 ============= ============ ============== ============== Weighted average number of common shares outstanding: Common shares outstanding 28,332 31,247 27,613 29,612 Stock Options and Rights - 616 - 505 Warrants - 2,832 - 1,714 ------------- ------------ -------------- -------------- 28,332 34,715 27,613 31,851 ============= ============ ============== ============== Fully diluted earnings(loss) per share $ (0.53) $ 0.59 $ (0.53) $ 0.96 ============= ============ ============== ============== Note: Common stock equivalents(stock options,rights and warrants) were anti-dilutive for the three months and six months ended March 31, 1995. Accordingly, they are not presented herein.