X0306 4 2016-03-04 0 0001048268 Integrated Electrical Services, Inc. IESC 0001540463 Lewey Robert W. 5433 WESTHEIMER, SUITE 500 HOUSTON TX 77056 0 1 0 0 President Common Stock 2016-03-04 4 M 0 1700 3.24 A 88583 D Common Stock 2016-03-04 4 S 0 1700 14.02 D 86883 D Common Stock 2016-03-07 4 M 0 8300 3.24 A 95183 D Common Stock 2016-03-07 4 M 0 400 5.76 A 95583 D Common Stock 2016-03-07 4 S 0 8700 13.02 D 86883 D Common Stock 2016-03-08 4 M 0 4600 5.76 A 91483 D Common Stock 2016-03-08 4 S 0 4600 13.36 D 86883 D Stock Option (Right to Buy) 3.24 2016-03-04 4 M 0 1700 0 D 2012-07-20 2021-07-20 Common Stock 1700 8300 D Stock Option (Right to Buy) 3.24 2016-03-07 4 M 0 8300 0 D 2012-07-20 2021-07-20 Common Stock 8300 0 D Stock Option (Right to Buy) 5.76 2016-03-07 4 M 0 400 0 D 2013-05-01 2023-05-01 Common Stock 400 27600 D Stock Option (Right to Buy) 5.76 2016-03-08 4 M 0 4600 0 D 2013-05-01 2023-05-01 Common Stock 4600 23000 D Represents common stock received from the exercise of stock options granted pursuant to the Integrated Electrical Services, Inc. 2006 Equity Incentive Plan (as amended and restated). The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $14.00 to $14.06, inclusive for transactions on 3/4/2016, $13.00 to $13.12, inclusive for transactions on 3/7/2016 and $13.26 to $13.57, inclusive for transactions on 3/8/2016. The reporting person undertakes to provide to IES, any security holder of IES, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. The date indicated is the first vesting date for all Column 6 transactions. All options traded on 3/4/2016 and 3/7/2016 with an exercise price of $3.24 vested in three annual installments beginning on the first anniversary of the grant date. All options traded on 3/7/2016 and 3/8/2016 with an exercise price of $5.76 vested on the second anniversary of the grant date. The price reported in Column 8 reflects that the stock options were granted to the employee pursuant to the Integrated Electrical Services, Inc. 2006 Equity Incentive Plan (as amended and restated). /s/ Gail D. Makode, Attorney-in-Fact 2016-03-08