0001057352-07-000051 8-K 8 20070622 5.02 8.01 9.01 20070622 20070622 COSTAR GROUP INC 0001057352 7389 522091509 1231 8-K 34 000-24531 07935835 2 BETHESDA METRO CENTER 10TH FLOOR BETHESDA MD 20814 3012158300 2 BETHESDA METRO CENTER 10TH FLOOR BETHESDA MD 20814 8-K 1 form_8-k.htm FORM 8-K EX-23.1 2 ex_23-1.htm EXHIBIT 23.1 EX-99.1 3 ex_99-1.htm EXHIBIT 99.1 RSG FORM EX-99.2 4 ex_99-2.htm EXBIBIT 99.2 ISO FORM EX-99.3 5 ex_99-3.htm EXHIBIT 99.3 NSO FORM EX-99.4 6 ex_99-4.htm EXHIBIT 99.4 EX-99.5 7 ex_99-5.htm EXHIBIT 99.5 EX-99.6 8 ex_99-6.htm EXHIBIT 99.6