1 EXHIBIT 11 ---------- ALLEN TELECOM INC. ------------------ EARNINGS PER COMMON SHARE DATA ------------------------------ (Amounts in Thousands) Net income and common shares used in the calculations of earnings per common share were computed as follows: THREE MONTHS ENDED NINE MONTHS ENDED SEPTEMBER 30, SEPTEMBER 30, ------------------- ------------------- 1997 1996 1997 1996 -------- -------- -------- -------- Income: - ------- Net income (loss) applicable to Common stock - primary $ 7,930 $ (2,991) $ 21,690 $ 6,391 ======== ======== ======== ======== Common Shares: - -------------- Weighted average outstanding Common shares 27,071 26,483 26,850 26,429 Dilutive common stock options 506 469 426 605 -------- -------- -------- -------- Common shares - primary 27,577 26,952 27,276 27,034 Additional common shares issuable for stock options 122 50 51 18 -------- -------- -------- -------- Common shares - fully diluted 27,699 27,002 27,327 27,052 ======== ======== ======== ======== This calculation of fully diluted earnings per common share is submitted in accordance with Regulation S-K Item 601 (b) (11), although it is not required for income statement presentation because it results in dilution of less than 3 percent. 19