| 1 | 541512 | COMPUTER SYSTEMS DESIGN SERVICES | $435,990,573 | 12 |
| 2 | 541611 | ADMINISTRATIVE MANAGEMENT AND GENERAL MANAGEMENT CONSULTING SERVICES | $189,709,440 | 37 |
| 3 | 541519 | OTHER COMPUTER RELATED SERVICES | $167,567,869 | 40 |
| 4 | 236220 | COMMERCIAL AND INSTITUTIONAL BUILDING CONSTRUCTION | $121,636,563 | 3 |
| 5 | 541511 | CUSTOM COMPUTER PROGRAMMING SERVICES | $70,432,369 | 12 |
| 6 | 561210 | FACILITIES SUPPORT SERVICES | $51,653,974 | 10 |
| 7 | 541330 | ENGINEERING SERVICES | $23,648,772 | 6 |
| 8 | 561410 | DOCUMENT PREPARATION SERVICES | $22,360,222 | 1 |
| 9 | 519130 | INTERNET PUBLISHING AND BROADCASTING AND WEB SEARCH PORTALS | $21,948,947 | 3 |
| 10 | 541211 | OFFICES OF CERTIFIED PUBLIC ACCOUNTANTS | $18,715,857 | 1 |
| 11 | 561720 | JANITORIAL SERVICES | $15,434,408 | 1 |
| 12 | 541620 | ENVIRONMENTAL CONSULTING SERVICES | $15,096,612 | 2 |
| 13 | 238210 | ELECTRICAL CONTRACTORS AND OTHER WIRING INSTALLATION CONTRACTORS | $13,249,985 | 1 |
| 14 | 517312 | WIRELESS TELECOMMUNICATIONS CARRIERS (EXCEPT SATELLITE) | $12,446,680 | 1 |
| 15 | 511210 | SOFTWARE PUBLISHERS | $10,703,004 | 5 |
| 16 | 541910 | MARKETING RESEARCH AND PUBLIC OPINION POLLING | $9,404,386 | 1 |
| 17 | 523110 | INVESTMENT BANKING AND SECURITIES DEALING | $7,012,095 | 1 |
| 18 | 561612 | SECURITY GUARDS AND PATROL SERVICES | $6,900,173 | 1 |
| 19 | 561110 | OFFICE ADMINISTRATIVE SERVICES | $5,918,167 | 3 |
| 20 | 561611 | INVESTIGATION AND PERSONAL BACKGROUND CHECK SERVICES | $3,914,539 | 2 |
| 21 | 541990 | ALL OTHER PROFESSIONAL, SCIENTIFIC, AND TECHNICAL SERVICES | $3,500,361 | 3 |
| 22 | 541199 | ALL OTHER LEGAL SERVICES | $3,142,449 | 2 |
| 23 | 337214 | OFFICE FURNITURE (EXCEPT WOOD) MANUFACTURING | $2,787,742 | 21 |
| 24 | 812930 | PARKING LOTS AND GARAGES | $2,088,899 | 1 |
| 25 | 541219 | OTHER ACCOUNTING SERVICES | $1,540,454 | 1 |
| 26 | 928120 | INTERNATIONAL AFFAIRS | $1,216,662 | 3 |
| 27 | 493110 | GENERAL WAREHOUSING AND STORAGE | $962,313 | 1 |
| 28 | 541310 | ARCHITECTURAL SERVICES | $769,118 | 1 |
| 29 | 484210 | USED HOUSEHOLD AND OFFICE GOODS MOVING | $725,000 | 1 |
| 30 | 561320 | TEMPORARY HELP SERVICES | $710,831 | 1 |
| 31 | 519120 | LIBRARIES AND ARCHIVES | $629,766 | 1 |
| 32 | 541712 | RESEARCH AND DEVELOPMENT IN THE PHYSICAL, ENGINEERING, AND LIFE SCIENCES (EXCEPT BIOTECHNOLOGY) | $558,177 | 7 |
| 33 | 541810 | ADVERTISING AGENCIES | $463,697 | 1 |
| 34 | 334111 | ELECTRONIC COMPUTER MANUFACTURING | $273,195 | 3 |
| 35 | 541612 | HUMAN RESOURCES CONSULTING SERVICES (2007), HUMAN RESOURCES AND EXECUTIVE SEARCH CONSULTING SERVICES (2002) | $233,404 | 1 |
| 36 | 561621 | SECURITY SYSTEMS SERVICES (EXCEPT LOCKSMITHS) | $211,748 | 1 |
| 37 | 811212 | COMPUTER AND OFFICE MACHINE REPAIR AND MAINTENANCE | $185,930 | 1 |
| 38 | 517311 | WIRED TELECOMMUNICATIONS CARRIERS | $86,922 | 1 |
| 39 | 517110 | WIRED TELECOMMUNICATIONS CARRIERS | $68,410 | 1 |
| 40 | 561499 | ALL OTHER BUSINESS SUPPORT SERVICES | $50,400 | 1 |
| 41 | 518210 | DATA PROCESSING, HOSTING, AND RELATED SERVICES | $39,759 | 2 |
| 42 | 453210 | OFFICE SUPPLIES AND STATIONERY STORES | $30,090 | 2 |
| 43 | 561599 | ALL OTHER TRAVEL ARRANGEMENT AND RESERVATION SERVICES | $24,042 | 1 |
| 44 | 518111 | INTERNET SERVICE PROVIDERS | $14,795 | 1 |
| 45 | 334516 | ANALYTICAL LABORATORY INSTRUMENT MANUFACTURING | $12,890 | 1 |
| 46 | 332510 | HARDWARE MANUFACTURING | $10,022 | 1 |