| Company Name | Address | City | State | Zip Code | Phone Number | Fax Number |
| ALLEGIANCE CONSTRUCTION GROUP | 1835 HICKS RD | ROLLING MEADOWS | IL | 60004 | (224) 231-9094 | (847) 534-2511 |
| ANCHOR MECHANICAL INC | 255 N CALIFORNIA | CHICAGO | IL | 60612 | (312) 492-6994 | (312) 492-6996 |
| ATLAS CRANE SERVICE INC | 1275 AURORA AVE LANE | AURORA | IL | 60505 | (630) 524-8813 | (630) 425-3143 |
| AUTUMN CONSTRUCTION SERVICES INC | 87 EISENHOWER LANE SOUTH | LOMBARD | IL | 60148 | (630) 588-9585 | (630) 588-9586 |
| BEE LINER LEAN SERVICES | 8401 S THOMAS AVE, A2 | BRIDGEVIEW | IL | 60455 | (708) 262-1761 | 999-999-9999 |
| BESSAMAIRE SALES INTERNATIONAL LLC | 1869 EAST AURORA RD | TWINSBURG | OH | 44087 | (216) 288-1231 | (999) 999-9999 |
| BIDNET | 20A RAILROAD AVE | ALBANY | NY | 12205 | (800) 677-1997 | (518) 438-0599 |
| BLACKRIDGE RESEARCH & CONSULTING | 4041 W HOLLOW CREEK DR | PEORIA | IL | 61615 | (917) 993-7467 | (917) 993-7467 |
| BROADWAY ELECTRIC INC | 500 W ALGONQUIN RD | MT. PROSPECT | IL | 60056 | (847) 593-0001 | (847) 593-0010 |
| BUILDERS AVENUE | 1452 E 52ND ST | CHICAGO | IL | 60615 | (708) 232-3919 | (708) 232-3919 |
| BURNS & MCDONNELL ENGINEERING | 200 W ADAMS, STE 2700 | CHICAGO | IL | 60606 | (816) 333-9400 | (630) 724-3201 |
| CONSTRUCT CONNECT | 30 TECHNOLOGY PKWY S, STE 100 | NORCROSS | GA | 30092 | (800) 364-2059 | (866) 570-8187 |
| CRAFT MECHANICAL LLC | 4639 W ARMITAGE AVE | CHICAGO | IL | 60639 | (630) 863-3371 | (999) 999-9999 |
| DATABID | 433 PENN ST | NEWTOWN | PA | 18940 | (888) 929-3282 | (888) 929-9293 |
| DELTA ENGINEERING INC | 111 W JACKSON BLVD, STE 910 | CHICAGO | IL | 60604-2001 | (312) 377-7700 | (312) 427-6145 |
| EATON CORP | 210 WINDY PT DR | GLENDALE HTS | IL | 60139 | (630) 260-6300 | (630) 260-6810 |
| EPLAN ONLINE PLANROOM | 1400 FORUM BLVD, STE 7B | COLUMBIA | IL | 65203 | (573) 447-7130 | (573) 355-5405 |
| FLEX-CLEAN, C/O ELAM CO | 1400 RENAISSANCE DR, STE 403 | PARK RIDGE | IL | 60068 | (847) 823-5400 | (847) 823-5455 |
| GASVODA & ASSOCIATES INC | 1530 HUNTINGTON DR | CALUMET CITY | IL | 60409 | (708) 891-4400 | (312) 894-1138 |
| GRANITE CONSTRUCTION CO | 1011 E TOUHY AVE, STE 500 | DES PLAINES | IL | 60018 | (847) 919-8200 | (866) 736-9487 |
| GRAYBAR ELECTRIC CO | ONE PIERCE PL, STE 800 | ITASCA | IL | 60143 | (630) 461-6914 | (630) 671-6000 |
| IHC CONSTRUCTION CO LLC | 385 AIRPORT RD, STE 100 | ELGIN | IL | 60123 | (847) 742-1516 | (847) 742-6610 |
| INDEPENDENT MECHANICAL | 2671 UNITED LN | ELK GROVE VILLAGE | IL | 60007 | (773) 243-0575 | (773) 496-8136 |
| INDUSTRIA INC | 2860 S RIVER ROAD, STE 100 | DESPLAINES | IL | 60018 | (773) 697-0190 | (773) 697-0191 |
| JOHN BURNS CONSTRUCTION COMPANY LLC | 999 OAKMONT PLAZA DR, SUITE 400 | WESTMONT | IL | 60559 | (708) 326-3500 | (000) 000-0000 |
| JOHNSON CONTROLS INC | 3007 MALMO DR | ARLINGTON HEIGHTS | IL | 60005 | (847) 545-5623 | (847) 364-1536 |
| KROESCHELL INC | 3222 N KENNICOTT AVE | ARLINGTON HTS | IL | 60004 | (312) 649-7980 | (312) 649-3640 |
| M J ELECTRIC | 108 INDUSTRIAL DR | MINOOKA | IL | 60447 | (906) 239-6130 | (906) 779-4217 |
| 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 |
| ORNELAS CONSTRUCTION COMPANY | 12520 W HORSESHOE DR | NEW LENOX | IL | 60451 | (815) 462-7600 | (815) 462-7601 |
| ORTIZ CONTRACTING GROUP | 9308 GULFSTREAM RD | FRANKFORT | IL | 60423 | (708) 595-8250 | (779) 456-7980 |
| PATH CONSTRUCTION COMPANY INC | 125 E ALGONQUIN RD | ARLINGTON HEIGHTS | IL | 60005 | (847) 398-7100 | (847) 398-7101 |
| POWERS & SONS CONSTRUCTION CO | 2636 W 15TH AVE | GARY | IN | 46404-2195 | (219) 949-3100 | (219) 949-5906 |
| QUANTUM CROSSINGS LLC | 111 E WACKER DR, STE 990 | CHICAGO | IL | 60601-4304 | (312) 467-0065 | (312) 467-0340 |
| ROYAL CRANE SERVICE INC | 3950 W 155TH ST | MARKHAM | IL | 60428 | (708) 974-0832 | (708) 974-0865 |
| SCHNEIDER ELECTRIC USA | ONE BOSTON PLACE, STE 2700 | BOSTON | MA | 02108 | (314) 330-7807 | (999) 999-9999 |
| 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 |
| TYLER LANE CONSTRUCTION INC | 6250 N RIVER RD, STE 5050 | ROSEMONT | IL | 60018 | (312) 691-2363 | (773) 588-3600 |
| W. E. ONEIL CONSTRUCTION CO | 1245 W WASHINGTON BLVD | CHICAGO | IL | 60607 | (773) 755-1611 | (773) 584-0866 |
| WILLIAM T CONNELLY INC dba | 476 BRIGHTON DR | BLOOMINGDALE | IL | 60108 | (630) 543-9059 | (630) 543-9077 |
| WUNDERLICH-MALEC | 937 NATIONAL AVENUE | ADDISON | IL | 60101 | (630) 827-0200 | (630) 827-0208 |