0000899243-01-501821 8-K 2 20011115 5 7 20011116 QUANTA SERVICES INC 0001050915 1731 742851603 DE 1231 8-K 34 001-13831 1794242 1360 POST OAK BLVD SUITE 2100 HOUSTON TX 77056 7133506000 1360 POST OAK BLVD SUITE 2100 HOUSTON TX 77056 8-K 1 d8k.txt CURRENT REPORT EX-4.6 3 dex46.txt AMEND. #1 TO THE RIGHTS AGREEMENT