X0202 4 2006-08-09 0001050915 QUANTA SERVICES INC PWR 0001079430 COLSON JOHN R 1360 POST OAK BOULEVARD, SUITE 2100 HOUSTON TX 77056 1 1 0 0 Chief Executive Officer Common Stock 2006-08-09 4 S 0 2300 16.75 D 2412911 D Common Stock 2006-08-09 4 S 0 2000 16.76 D 2410911 D Common Stock 2006-08-09 4 S 0 800 16.77 D 2410111 D Common Stock 2006-08-09 4 S 0 10000 16.78 D 2400111 D Common Stock 2006-08-09 4 S 0 1700 16.79 D 2398411 D Common Stock 2006-08-09 4 S 0 10400 16.8 D 2388011 D Common Stock 2006-08-09 4 S 0 4800 16.81 D 2383211 D Common Stock 2006-08-09 4 S 0 2300 16.82 D 2380911 D Common Stock 2006-08-09 4 S 0 5200 16.83 D 2375711 D Common Stock 2006-08-09 4 S 0 1100 16.84 D 2374611 D Common Stock 2006-08-09 4 S 0 300 16.85 D 2374311 D Common Stock 2006-08-09 4 S 0 500 16.86 D 2373811 D Common Stock 2006-08-09 4 S 0 1200 16.88 D 2372611 D Common Stock 2006-08-09 4 S 0 1800 16.89 D 2370811 D Common Stock 2006-08-09 4 S 0 4000 16.9 D 2366811 D Common Stock 2006-08-09 4 S 0 1000 16.91 D 2365811 D Common Stock 2006-08-09 4 S 0 1700 16.92 D 2364111 D Common Stock 2006-08-09 4 S 0 1800 16.93 D 2362311 D Common Stock 2006-08-09 4 S 0 1100 16.94 D 2361211 D Common Stock 2006-08-09 4 S 0 1900 16.95 D 2359311 D Common Stock 2006-08-09 4 S 0 800 16.96 D 2358511 D Common Stock 2006-08-09 4 S 0 400 16.97 D 2358111 D Common Stock 2006-08-09 4 S 0 400 16.98 D 2357711 D Common Stock 2006-08-09 4 S 0 100 16.99 D 2357611 D Common Stock 2006-08-09 4 S 0 18500 17.09 D 2339111 D Common Stock 2006-08-09 4 S 0 120700 17.1 D 2218411 D Common Stock 2006-08-09 4 S 0 1000 17.12 D 2217411 D Common Stock 2006-08-09 4 S 0 1700 17.13 D 2215711 D Common Stock 2006-08-09 4 S 0 100 17.14 D 2215611 D Common Stock 13500 I By general partnership John R. Colson 2006-08-10