| 1 | 541990 | ALL OTHER PROFESSIONAL, SCIENTIFIC, AND TECHNICAL SERVICES | $534,452,162 | 15 |
| 2 | 541512 | COMPUTER SYSTEMS DESIGN SERVICES | $243,879,649 | 11 |
| 3 | 541199 | ALL OTHER LEGAL SERVICES | $161,811,846 | 9 |
| 4 | 561612 | SECURITY GUARDS AND PATROL SERVICES | $150,005,776 | 3 |
| 5 | 541519 | OTHER COMPUTER RELATED SERVICES | $143,534,569 | 70 |
| 6 | 236220 | COMMERCIAL AND INSTITUTIONAL BUILDING CONSTRUCTION | $131,355,202 | 9 |
| 7 | 541330 | ENGINEERING SERVICES | $130,926,871 | 13 |
| 8 | 541611 | ADMINISTRATIVE MANAGEMENT AND GENERAL MANAGEMENT CONSULTING SERVICES | $117,394,752 | 42 |
| 9 | 561210 | FACILITIES SUPPORT SERVICES | $93,308,771 | 10 |
| 10 | 561110 | OFFICE ADMINISTRATIVE SERVICES | $85,667,856 | 3 |
| 11 | 541511 | CUSTOM COMPUTER PROGRAMMING SERVICES | $59,959,858 | 12 |
| 12 | 541715 | RESEARCH AND DEVELOPMENT IN THE PHYSICAL, ENGINEERING, AND LIFE SCIENCES (EXCEPT NANOTECHNOLOGY AND BIOTECHNOLOGY) | $58,852,645 | 3 |
| 13 | 541513 | COMPUTER FACILITIES MANAGEMENT SERVICES | $57,386,177 | 7 |
| 14 | 624310 | VOCATIONAL REHABILITATION SERVICES | $49,549,818 | 2 |
| 15 | 511210 | SOFTWARE PUBLISHERS | $17,533,128 | 12 |
| 16 | 541219 | OTHER ACCOUNTING SERVICES | $12,101,329 | 2 |
| 17 | 541690 | OTHER SCIENTIFIC AND TECHNICAL CONSULTING SERVICES | $9,545,335 | 2 |
| 18 | 928120 | INTERNATIONAL AFFAIRS | $9,514,511 | 32 |
| 19 | 541613 | MARKETING CONSULTING SERVICES | $7,731,817 | 1 |
| 20 | 517312 | WIRELESS TELECOMMUNICATIONS CARRIERS (EXCEPT SATELLITE) | $7,652,795 | 6 |
| 21 | 237990 | OTHER HEAVY AND CIVIL ENGINEERING CONSTRUCTION | $6,968,686 | 1 |
| 22 | 611430 | PROFESSIONAL AND MANAGEMENT DEVELOPMENT TRAINING | $6,268,606 | 5 |
| 23 | 561320 | TEMPORARY HELP SERVICES | $6,022,375 | 4 |
| 24 | 516110 | RADIO BROADCASTING STATIONS | $5,233,983 | 1 |
| 25 | 337214 | OFFICE FURNITURE (EXCEPT WOOD) MANUFACTURING | $4,316,528 | 28 |
| 26 | 611513 | APPRENTICESHIP TRAINING | $3,699,618 | 1 |
| 27 | 519290 | WEB SEARCH PORTALS AND ALL OTHER INFORMATION SERVICES | $3,488,560 | 2 |
| 28 | 513210 | SOFTWARE PUBLISHERS | $3,111,937 | 3 |
| 29 | 519190 | ALL OTHER INFORMATION SERVICES | $3,042,765 | 1 |
| 30 | 512110 | MOTION PICTURE AND VIDEO PRODUCTION | $2,857,960 | 3 |
| 31 | 561621 | SECURITY SYSTEMS SERVICES (EXCEPT LOCKSMITHS) | $2,755,851 | 2 |
| 32 | 334111 | ELECTRONIC COMPUTER MANUFACTURING | $2,751,043 | 1 |
| 33 | 334220 | RADIO AND TELEVISION BROADCASTING AND WIRELESS COMMUNICATIONS EQUIPMENT MANUFACTURING | $2,606,387 | 1 |
| 34 | 541620 | ENVIRONMENTAL CONSULTING SERVICES | $2,476,170 | 2 |
| 35 | 423450 | MEDICAL, DENTAL, AND HOSPITAL EQUIPMENT AND SUPPLIES MERCHANT WHOLESALERS | $2,057,663 | 3 |
| 36 | 334511 | SEARCH, DETECTION, NAVIGATION, GUIDANCE, AERONAUTICAL, AND NAUTICAL SYSTEM AND INSTRUMENT MANUFACTURING | $1,605,879 | 1 |
| 37 | 561611 | INVESTIGATION AND PERSONAL BACKGROUND CHECK SERVICES | $1,319,003 | 2 |
| 38 | 541612 | HUMAN RESOURCES CONSULTING SERVICES (2007), HUMAN RESOURCES AND EXECUTIVE SEARCH CONSULTING SERVICES (2002) | $1,232,491 | 1 |
| 39 | 541211 | OFFICES OF CERTIFIED PUBLIC ACCOUNTANTS | $1,087,272 | 2 |
| 40 | 928110 | NATIONAL SECURITY | $988,427 | 1 |
| 41 | 813920 | PROFESSIONAL ORGANIZATIONS | $867,135 | 1 |
| 42 | 517111 | WIRED TELECOMMUNICATIONS CARRIERS | $800,000 | 1 |
| 43 | 541310 | ARCHITECTURAL SERVICES | $780,969 | 1 |
| 44 | 562910 | REMEDIATION SERVICES | $652,300 | 1 |
| 45 | 337122 | NONUPHOLSTERED WOOD HOUSEHOLD FURNITURE MANUFACTURING | $629,400 | 1 |
| 46 | 561450 | CREDIT BUREAUS | $612,334 | 3 |
| 47 | 518210 | DATA PROCESSING, HOSTING, AND RELATED SERVICES | $594,596 | 2 |
| 48 | 722310 | FOOD SERVICE CONTRACTORS | $447,807 | 1 |
| 49 | 621999 | ALL OTHER MISCELLANEOUS AMBULATORY HEALTH CARE SERVICES | $393,083 | 2 |
| 50 | 492110 | COURIERS AND EXPRESS DELIVERY SERVICES | $377,171 | 5 |
| 51 | 561790 | OTHER SERVICES TO BUILDINGS AND DWELLINGS | $356,573 | 1 |
| 52 | 334310 | AUDIO AND VIDEO EQUIPMENT MANUFACTURING | $315,314 | 1 |
| 53 | 561492 | COURT REPORTING AND STENOTYPE SERVICES | $315,000 | 1 |
| 54 | 811210 | ELECTRONIC AND PRECISION EQUIPMENT REPAIR AND MAINTENANCE | $300,000 | 1 |
| 55 | 811310 | COMMERCIAL AND INDUSTRIAL MACHINERY AND EQUIPMENT (EXCEPT AUTOMOTIVE AND ELECTRONIC) REPAIR AND MAINTENANCE | $264,696 | 1 |
| 56 | 541430 | GRAPHIC DESIGN SERVICES | $232,363 | 1 |
| 57 | 541712 | RESEARCH AND DEVELOPMENT IN THE PHYSICAL, ENGINEERING, AND LIFE SCIENCES (EXCEPT BIOTECHNOLOGY) | $194,005 | 1 |
| 58 | 511199 | ALL OTHER PUBLISHERS | $166,104 | 1 |
| 59 | 332992 | SMALL ARMS AMMUNITION MANUFACTURING | $156,960 | 1 |
| 60 | 333316 | PHOTOGRAPHIC AND PHOTOCOPYING EQUIPMENT MANUFACTURING | $155,291 | 1 |
| 61 | 922160 | FIRE PROTECTION | $151,588 | 1 |
| 62 | 458110 | CLOTHING AND CLOTHING ACCESSORIES RETAILERS | $108,201 | 1 |
| 63 | 541930 | TRANSLATION AND INTERPRETATION SERVICES | $105,588 | 2 |
| 64 | 561730 | LANDSCAPING SERVICES | $96,821 | 1 |
| 65 | 812930 | PARKING LOTS AND GARAGES | $69,030 | 2 |
| 66 | 325414 | BIOLOGICAL PRODUCT (EXCEPT DIAGNOSTIC) MANUFACTURING | $60,935 | 1 |
| 67 | 561720 | JANITORIAL SERVICES | $60,480 | 1 |
| 68 | 334290 | OTHER COMMUNICATIONS EQUIPMENT MANUFACTURING | $36,000 | 1 |
| 69 | 611710 | EDUCATIONAL SUPPORT SERVICES | $34,250 | 1 |
| 70 | 423490 | OTHER PROFESSIONAL EQUIPMENT AND SUPPLIES MERCHANT WHOLESALERS | $32,250 | 1 |
| 71 | 326122 | PLASTICS PIPE AND PIPE FITTING MANUFACTURING | $29,787 | 5 |
| 72 | 519130 | INTERNET PUBLISHING AND BROADCASTING AND WEB SEARCH PORTALS | $16,385 | 1 |
| 73 | 492210 | LOCAL MESSENGERS AND LOCAL DELIVERY | $10,399 | 1 |
| 74 | 323113 | COMMERCIAL SCREEN PRINTING | $9,000 | 1 |
| 75 | 423430 | COMPUTER AND COMPUTER PERIPHERAL EQUIPMENT AND SOFTWARE MERCHANT WHOLESALERS | $174 | 1 |