| 1 | 541512 | COMPUTER SYSTEMS DESIGN SERVICES | $647,958,199 | 8 |
| 2 | 236220 | COMMERCIAL AND INSTITUTIONAL BUILDING CONSTRUCTION | $535,990,100 | 15 |
| 3 | 541715 | RESEARCH AND DEVELOPMENT IN THE PHYSICAL, ENGINEERING, AND LIFE SCIENCES (EXCEPT NANOTECHNOLOGY AND BIOTECHNOLOGY) | $321,853,904 | 6 |
| 4 | 541330 | ENGINEERING SERVICES | $245,100,008 | 10 |
| 5 | 541519 | OTHER COMPUTER RELATED SERVICES | $238,920,897 | 188 |
| 6 | 561210 | FACILITIES SUPPORT SERVICES | $176,130,864 | 8 |
| 7 | 541611 | ADMINISTRATIVE MANAGEMENT AND GENERAL MANAGEMENT CONSULTING SERVICES | $97,870,603 | 15 |
| 8 | 511210 | SOFTWARE PUBLISHERS | $93,830,116 | 8 |
| 9 | 518210 | DATA PROCESSING, HOSTING, AND RELATED SERVICES | $84,849,778 | 4 |
| 10 | 541511 | CUSTOM COMPUTER PROGRAMMING SERVICES | $77,669,213 | 11 |
| 11 | 221210 | NATURAL GAS DISTRIBUTION | $55,552,978 | 1 |
| 12 | 541690 | OTHER SCIENTIFIC AND TECHNICAL CONSULTING SERVICES | $44,349,717 | 7 |
| 13 | 541712 | RESEARCH AND DEVELOPMENT IN THE PHYSICAL, ENGINEERING, AND LIFE SCIENCES (EXCEPT BIOTECHNOLOGY) | $34,822,392 | 1 |
| 14 | 561611 | INVESTIGATION AND PERSONAL BACKGROUND CHECK SERVICES | $33,236,827 | 1 |
| 15 | 561920 | CONVENTION AND TRADE SHOW ORGANIZERS | $14,483,292 | 1 |
| 16 | 541720 | RESEARCH AND DEVELOPMENT IN THE SOCIAL SCIENCES AND HUMANITIES | $11,403,516 | 3 |
| 17 | 541910 | MARKETING RESEARCH AND PUBLIC OPINION POLLING | $6,094,298 | 1 |
| 18 | 238210 | ELECTRICAL CONTRACTORS AND OTHER WIRING INSTALLATION CONTRACTORS | $5,162,619 | 1 |
| 19 | 541990 | ALL OTHER PROFESSIONAL, SCIENTIFIC, AND TECHNICAL SERVICES | $4,523,130 | 10 |
| 20 | 561612 | SECURITY GUARDS AND PATROL SERVICES | $3,940,215 | 1 |
| 21 | 315999 | OTHER APPAREL ACCESSORIES AND OTHER APPAREL MANUFACTURING | $3,362,924 | 1 |
| 22 | 541219 | OTHER ACCOUNTING SERVICES | $3,284,737 | 1 |
| 23 | 334220 | RADIO AND TELEVISION BROADCASTING AND WIRELESS COMMUNICATIONS EQUIPMENT MANUFACTURING | $3,206,779 | 1 |
| 24 | 561720 | JANITORIAL SERVICES | $2,517,726 | 1 |
| 25 | 513210 | SOFTWARE PUBLISHERS | $2,204,595 | 3 |
| 26 | 238220 | PLUMBING, HEATING, AND AIR-CONDITIONING CONTRACTORS | $1,781,780 | 1 |
| 27 | 334516 | ANALYTICAL LABORATORY INSTRUMENT MANUFACTURING | $1,449,409 | 3 |
| 28 | 926150 | REGULATION, LICENSING, AND INSPECTION OF MISCELLANEOUS COMMERCIAL SECTORS | $1,401,644 | 1 |
| 29 | 561730 | LANDSCAPING SERVICES | $1,371,820 | 2 |
| 30 | 334512 | AUTOMATIC ENVIRONMENTAL CONTROL MANUFACTURING FOR RESIDENTIAL, COMMERCIAL, AND APPLIANCE USE | $1,311,612 | 1 |
| 31 | 562910 | REMEDIATION SERVICES | $1,182,725 | 1 |
| 32 | 611110 | ELEMENTARY AND SECONDARY SCHOOLS | $1,142,396 | 1 |
| 33 | 811310 | COMMERCIAL AND INDUSTRIAL MACHINERY AND EQUIPMENT (EXCEPT AUTOMOTIVE AND ELECTRONIC) REPAIR AND MAINTENANCE | $1,124,883 | 4 |
| 34 | 611430 | PROFESSIONAL AND MANAGEMENT DEVELOPMENT TRAINING | $791,808 | 1 |
| 35 | 561320 | TEMPORARY HELP SERVICES | $775,914 | 1 |
| 36 | 325413 | IN-VITRO DIAGNOSTIC SUBSTANCE MANUFACTURING | $688,566 | 1 |
| 37 | 541614 | PROCESS, PHYSICAL DISTRIBUTION, AND LOGISTICS CONSULTING SERVICES | $679,285 | 2 |
| 38 | 562111 | SOLID WASTE COLLECTION | $643,019 | 1 |
| 39 | 532420 | OFFICE MACHINERY AND EQUIPMENT RENTAL AND LEASING | $536,136 | 1 |
| 40 | 333310 | COMMERCIAL AND SERVICE INDUSTRY MACHINERY MANUFACTURING | $512,222 | 1 |
| 41 | 339113 | SURGICAL APPLIANCE AND SUPPLIES MANUFACTURING | $507,274 | 28 |
| 42 | 811210 | ELECTRONIC AND PRECISION EQUIPMENT REPAIR AND MAINTENANCE | $442,089 | 7 |
| 43 | 337214 | OFFICE FURNITURE (EXCEPT WOOD) MANUFACTURING | $414,142 | 6 |
| 44 | 561110 | OFFICE ADMINISTRATIVE SERVICES | $402,243 | 1 |
| 45 | 334111 | ELECTRONIC COMPUTER MANUFACTURING | $343,611 | 1 |
| 46 | 423430 | COMPUTER AND COMPUTER PERIPHERAL EQUIPMENT AND SOFTWARE MERCHANT WHOLESALERS | $332,662 | 2 |
| 47 | 492110 | COURIERS AND EXPRESS DELIVERY SERVICES | $258,220 | 1 |
| 48 | 492210 | LOCAL MESSENGERS AND LOCAL DELIVERY | $248,532 | 1 |
| 49 | 561499 | ALL OTHER BUSINESS SUPPORT SERVICES | $210,614 | 1 |
| 50 | 333318 | OTHER COMMERCIAL AND SERVICE INDUSTRY MACHINERY MANUFACTURING | $187,281 | 1 |
| 51 | 339112 | SURGICAL AND MEDICAL INSTRUMENT MANUFACTURING | $176,157 | 1 |
| 52 | 519210 | LIBRARIES AND ARCHIVES | $165,213 | 1 |
| 53 | 611420 | COMPUTER TRAINING | $156,600 | 1 |
| 54 | 541930 | TRANSLATION AND INTERPRETATION SERVICES | $153,461 | 2 |
| 55 | 325120 | INDUSTRIAL GAS MANUFACTURING | $139,018 | 1 |
| 56 | 541513 | COMPUTER FACILITIES MANAGEMENT SERVICES | $93,803 | 1 |
| 57 | 811219 | OTHER ELECTRONIC AND PRECISION EQUIPMENT REPAIR AND MAINTENANCE | $91,518 | 1 |
| 58 | 323111 | COMMERCIAL PRINTING (EXCEPT SCREEN AND BOOKS) | $64,950 | 1 |
| 59 | 334510 | ELECTROMEDICAL AND ELECTROTHERAPEUTIC APPARATUS MANUFACTURING | $58,216 | 1 |
| 60 | 221122 | ELECTRIC POWER DISTRIBUTION | $56,840 | 1 |
| 61 | 484210 | USED HOUSEHOLD AND OFFICE GOODS MOVING | $56,139 | 1 |
| 62 | 541620 | ENVIRONMENTAL CONSULTING SERVICES | $51,774 | 1 |
| 63 | 519290 | WEB SEARCH PORTALS AND ALL OTHER INFORMATION SERVICES | $31,125 | 1 |
| 64 | 561621 | SECURITY SYSTEMS SERVICES (EXCEPT LOCKSMITHS) | $29,999 | 1 |
| 65 | 333923 | OVERHEAD TRAVELING CRANE, HOIST, AND MONORAIL SYSTEM MANUFACTURING | $26,680 | 1 |
| 66 | 561492 | COURT REPORTING AND STENOTYPE SERVICES | $26,240 | 1 |
| 67 | 541380 | TESTING LABORATORIES AND SERVICES | $16,478 | 1 |
| 68 | 517312 | WIRELESS TELECOMMUNICATIONS CARRIERS (EXCEPT SATELLITE) | $13,061 | 2 |
| 69 | 517810 | ALL OTHER TELECOMMUNICATIONS | $11,134 | 1 |
| 70 | 562211 | HAZARDOUS WASTE TREATMENT AND DISPOSAL | $10,688 | 1 |