| Company Name | Address | City | State | Zip Code | Phone Number | Fax Number |
| ANCHOR MECHANICAL INC | 255 N CALIFORNIA | CHICAGO | IL | 60612 | (312) 492-6994 | (312) 492-6996 |
| BIDNET | 20A RAILROAD AVE | ALBANY | NY | 12205 | (800) 677-1997 | (518) 438-0599 |
| BOILERMAKERS LOCAL 1 | 2941 ARCHER AVE | CHICAGO | IL | 60608 | (773) 551-1110 | (773) 247-0083 |
| BUILDERS AVENUE | 1452 E 52ND ST | CHICAGO | IL | 60615 | (708) 232-3919 | (708) 232-3919 |
| CHICAGOLAND | PO BOX 3533 | PEORIA | IL | 61612 | (309) 401-6167 | (309) 401-6168 |
| CONSTRUCT CONNECT | 30 TECHNOLOGY PKWY S, STE 100 | NORCROSS | GA | 30092 | (800) 364-2059 | (866) 570-8187 |
| DATABID | 433 PENN ST | NEWTOWN | PA | 18940 | (888) 929-3282 | (888) 929-9293 |
| EAST WEST HOLDINGS REGIONAL CTR LLC | 1434 S LAFLIN ST | CHICAGO | IL | 60608 | (312) 720-0579 | (999) 999-9999 |
| EPLAN ONLINE PLANROOM | 1400 FORUM BLVD, STE 7B | COLUMBIA | IL | 65203 | (573) 447-7130 | (573) 355-5405 |
| EPSTEIN & SONS INTL INC, A | 600 W FULTON ST | CHICAGO | IL | 60661 | (312) 429-8072 | (312) 559-1217 |
| FABTECH PIPING AND SERVICE | 1795 CORTLAND CT, UNIT D | ADDISON | IL | 60101 | (630) 347-6536 | (847) 200-1608 |
| GHX INDUSTRIAL LLC | 10321 WERCH DR | WOODRIDGE | IL | 60517 | (847) 373-0789 | (630) 685-4111 |
| INDEPENDENT MECHANICAL | 2671 UNITED LN | ELK GROVE VILLAGE | IL | 60007 | (773) 243-0575 | (773) 496-8136 |
| INDI ENTERPRISE INC | 535 CHIPPEWA TR | CAROL STREAM | IL | 60188-1589 | (630) 462-6980 | (630) 868-3861 |
| MORRISON CONSTRUCTION COMPANY INC | 1834 SUMMER ST | HAMMOND | IN | 46320 | (219) 932-5036 | (219) 933-7302 |
| MPZ MASONRY INC | 4844 N LAMON AVE | CHICAGO | IL | 60630 | (773) 685-0279 | (773) 685-0280 |
| NORTH AMERICA PROCUREMENT COUNCIL | P O BOX 40445 | GRAND JUNCTION | CO | 81504 | (302) 450-1923 | (302) 450-1925 |
| ORION GROUP ASTRA SUB TOPCO LLC dba | 2401 INTERNAITONALE PKWY, UNIT C | WOODRIDGE | IL | 60517 | (708) 774-0582 | (999) 999-9999 |
| PRIME TECH ENGINEERING | 823 SUNNYSLOPE WAY | AUBURN | CA | 95603 | (909) 519-7721 | (909) 519-7721 |
| REYES GROUP LTD | 15515 S CRAWFORD AVE | MARKHAM | IL | 60428 | (708) 596-7100 | (708) 596-7184 |
| SIEMENS INDUSTRY INC | 1701 GOLF ROAD, STE 3-500 | ROLLING MEADOWS | IL | 60008 | (847) 803-2700 | (847) 803-2733 |
| SMARTPROCURE INC | 700 W HILLSBORO BLVD, STE 4-100 | DEERFIELD BEACH | FL | 33441 | (888) 998-8675 | (954) 399-7067 |
| THE STONE GROUP INC | 900 S CAMPBELL AVE | CHICAGO | IL | 60612 | (773) 638-2758 | (312) 492-6996 |