EXHIBIT 11 TELLABS, INC. COMPUTATION OF EARNINGS PER SHARE (Unaudited) (In thousands, except per share data) Three Months Ended Nine Months Ended Sept. 29, Sept. 30, Sept. 29, Sept. 30, 1995 1994 * 1995 1994 * --------- --------- --------- --------- PRIMARY EARNINGS PER SHARE - ------------------------------------ Weighted average number of common shares outstanding during the period 88,455 86,965 88,049 86,686 Net additional shares assuming dilutive stock options exercised and proceeds used to purchase treasury shares at average fair market value 3,471 3,791 3,530 3,671 --------- --------- --------- --------- Weighted average number of common shares and common equivalent shares outstanding 91,926 90,756 91,579 90,357 ========= ========= ========= ========= Net earnings $27,441 $18,098 $77,500 $46,314 ========= ========= ========= ========= Primary earnings per share $0.30 $0.20 $0.85 $0.51 ========= ========= ========= ========= FULLY DILUTED EARNINGS PER SHARE - ------------------------------------ Weighted average number of common shares outstanding during the period 88,455 86,965 88,049 86,686 Net additional shares assuming dilutive stock options exercised and proceeds used to purchase treasury shares at average fair market value 3,471 3,982 3,639 3,751 --------- --------- --------- --------- Weighted average number of common shares and common equivalent shares outstanding 91,926 90,947 91,688 90,437 ========= ========= ========= ========= Net earnings $27,441 $18,098 $77,500 $46,314 ========= ========= ========= ========= Fully diluted earnings per share $0.30 $0.20 $0.85 $0.51 ========= ========= ========= ========= * 1994 share amounts are restated to give effect to the two-for-one stock split effective May 19, 1995. -13-