Exhibit 11 EMCOR Group, Inc. and Subsidiaries Computation of Earnings Per Common Share and Common Equivalent Share for the three and six month periods ended June 30, 1997. Three Months Six Months Ended PRIMARY Ended June 30, 1997 June 30, 1997 - ---------------------------------------- ------------------ ------------------ Net Income $893,000 $1,149,000 ================== ================== Weighted average number of common shares outstanding 9,535,697 9,525,224 Add - common equivalent shares using the treasury stock method 485,136 497,289 ------------------ ------------------ Weighted average number of shares used in calculation of primary income per common and common equivalent share 10,020,833 10,022,513 ================== ================== Primary net income per common and common equivalent share $0.09 $0.11 ================== ================== FULLY DILUTED - ---------------------------------------- Net Income $893,000 $1,149,000 ================== ================== Weighted average number of shares used in calculating primary income per share 10,020,833 10,022,513 Shares issuable upon exercise of stock options included in primary calculation above (485,136) (497,289) Shares issuable upon exercise of stock options at period end market price 540,485 540,485 ------------------ ------------------ Weighted average number of shares used in calculation of fully diluted income per common and common equivalent share 10,076,182 10,065,709 ================== ================== Fully diluted net income per common and common equivalent share $0.09 $0.11 ================== ==================