X0202 4 2007-03-07 0 0001050915 QUANTA SERVICES INC PWR 0001079430 COLSON JOHN R 1360 POST OAK BLVD., SUITE 2100 HOUSTON TX 77056-3023 1 1 0 0 Chief Executive Officer Common Stock 2007-03-07 4 F 0 2105 22.68 D 1699903 D These shares were withheld to cover taxes associated with vest of shares of restricted stock issued under the Company's 2001 Stock Incentive Plan (as amended and restated March 13, 2003). The effective date of withholding of these shares will be deemed to be February 28, 2007 to coincide with the vesting date of such shares of restricted stock. /s/ Vincent A. Mercaldi, Atty-in-Fact 2007-03-07