| 1 | 541512 | COMPUTER SYSTEMS DESIGN SERVICES | $1,205,562,298 | 37 |
| 2 | 541715 | RESEARCH AND DEVELOPMENT IN THE PHYSICAL, ENGINEERING, AND LIFE SCIENCES (EXCEPT NANOTECHNOLOGY AND BIOTECHNOLOGY) | $552,544,372 | 5 |
| 3 | 541519 | OTHER COMPUTER RELATED SERVICES | $364,501,641 | 40 |
| 4 | 541330 | ENGINEERING SERVICES | $325,753,673 | 34 |
| 5 | 541513 | COMPUTER FACILITIES MANAGEMENT SERVICES | $297,614,252 | 6 |
| 6 | 541511 | CUSTOM COMPUTER PROGRAMMING SERVICES | $279,762,339 | 22 |
| 7 | 541611 | ADMINISTRATIVE MANAGEMENT AND GENERAL MANAGEMENT CONSULTING SERVICES | $194,629,946 | 38 |
| 8 | 423850 | SERVICE ESTABLISHMENT EQUIPMENT AND SUPPLIES MERCHANT WHOLESALERS | $105,329,758 | 11 |
| 9 | 325180 | OTHER BASIC INORGANIC CHEMICAL MANUFACTURING | $79,811,931 | 1 |
| 10 | 561210 | FACILITIES SUPPORT SERVICES | $73,863,024 | 11 |
| 11 | 511210 | SOFTWARE PUBLISHERS | $61,967,959 | 15 |
| 12 | 339999 | ALL OTHER MISCELLANEOUS MANUFACTURING | $60,810,085 | 44 |
| 13 | 334511 | SEARCH, DETECTION, NAVIGATION, GUIDANCE, AERONAUTICAL, AND NAUTICAL SYSTEM AND INSTRUMENT MANUFACTURING | $31,280,983 | 2 |
| 14 | 561611 | INVESTIGATION AND PERSONAL BACKGROUND CHECK SERVICES | $21,659,474 | 5 |
| 15 | 332999 | ALL OTHER MISCELLANEOUS FABRICATED METAL PRODUCT MANUFACTURING | $19,510,451 | 3 |
| 16 | 522320 | FINANCIAL TRANSACTIONS PROCESSING, RESERVE, AND CLEARINGHOUSE ACTIVITIES | $18,778,323 | 1 |
| 17 | 561110 | OFFICE ADMINISTRATIVE SERVICES | $18,569,608 | 2 |
| 18 | 541620 | ENVIRONMENTAL CONSULTING SERVICES | $18,427,938 | 8 |
| 19 | 423430 | COMPUTER AND COMPUTER PERIPHERAL EQUIPMENT AND SOFTWARE MERCHANT WHOLESALERS | $17,663,310 | 11 |
| 20 | 541219 | OTHER ACCOUNTING SERVICES | $14,119,144 | 2 |
| 21 | 541990 | ALL OTHER PROFESSIONAL, SCIENTIFIC, AND TECHNICAL SERVICES | $11,974,250 | 5 |
| 22 | 339113 | SURGICAL APPLIANCE AND SUPPLIES MANUFACTURING | $9,797,598 | 1 |
| 23 | 532283 | HOME HEALTH EQUIPMENT RENTAL | $7,710,926 | 1 |
| 24 | 483111 | DEEP SEA FREIGHT TRANSPORTATION | $5,588,858 | 1 |
| 25 | 236220 | COMMERCIAL AND INSTITUTIONAL BUILDING CONSTRUCTION | $5,166,189 | 2 |
| 26 | 611430 | PROFESSIONAL AND MANAGEMENT DEVELOPMENT TRAINING | $3,070,097 | 3 |
| 27 | 621999 | ALL OTHER MISCELLANEOUS AMBULATORY HEALTH CARE SERVICES | $2,832,439 | 1 |
| 28 | 541613 | MARKETING CONSULTING SERVICES | $2,628,630 | 2 |
| 29 | 561499 | ALL OTHER BUSINESS SUPPORT SERVICES | $2,350,362 | 7 |
| 30 | 334512 | AUTOMATIC ENVIRONMENTAL CONTROL MANUFACTURING FOR RESIDENTIAL, COMMERCIAL, AND APPLIANCE USE | $2,318,154 | 1 |
| 31 | 334515 | INSTRUMENT MANUFACTURING FOR MEASURING AND TESTING ELECTRICITY AND ELECTRICAL SIGNALS | $2,256,839 | 1 |
| 32 | 541199 | ALL OTHER LEGAL SERVICES | $2,251,050 | 2 |
| 33 | 334310 | AUDIO AND VIDEO EQUIPMENT MANUFACTURING | $1,590,716 | 1 |
| 34 | 336414 | GUIDED MISSILE AND SPACE VEHICLE MANUFACTURING | $1,450,000 | 1 |
| 35 | 541211 | OFFICES OF CERTIFIED PUBLIC ACCOUNTANTS | $614,119 | 1 |
| 36 | 339112 | SURGICAL AND MEDICAL INSTRUMENT MANUFACTURING | $532,488 | 1 |
| 37 | 517911 | TELECOMMUNICATIONS RESELLERS | $528,408 | 1 |
| 38 | 334111 | ELECTRONIC COMPUTER MANUFACTURING | $477,541 | 1 |
| 39 | 561621 | SECURITY SYSTEMS SERVICES (EXCEPT LOCKSMITHS) | $461,560 | 6 |
| 40 | 337214 | OFFICE FURNITURE (EXCEPT WOOD) MANUFACTURING | $458,789 | 5 |
| 41 | 531210 | OFFICES OF REAL ESTATE AGENTS AND BROKERS | $419,325 | 3 |
| 42 | 541614 | PROCESS, PHYSICAL DISTRIBUTION, AND LOGISTICS CONSULTING SERVICES | $329,198 | 1 |
| 43 | 561730 | LANDSCAPING SERVICES | $263,832 | 1 |
| 44 | 517311 | WIRED TELECOMMUNICATIONS CARRIERS | $255,696 | 1 |
| 45 | 513210 | SOFTWARE PUBLISHERS | $236,476 | 1 |
| 46 | 541690 | OTHER SCIENTIFIC AND TECHNICAL CONSULTING SERVICES | $209,509 | 1 |
| 47 | 334419 | OTHER ELECTRONIC COMPONENT MANUFACTURING | $122,658 | 2 |
| 48 | 611310 | COLLEGES, UNIVERSITIES, AND PROFESSIONAL SCHOOLS | $111,587 | 1 |
| 49 | 492110 | COURIERS AND EXPRESS DELIVERY SERVICES | $110,838 | 1 |
| 50 | 423450 | MEDICAL, DENTAL, AND HOSPITAL EQUIPMENT AND SUPPLIES MERCHANT WHOLESALERS | $102,608 | 24 |
| 51 | 517312 | WIRELESS TELECOMMUNICATIONS CARRIERS (EXCEPT SATELLITE) | $99,563 | 1 |
| 52 | 519190 | ALL OTHER INFORMATION SERVICES | $99,054 | 1 |
| 53 | 811210 | ELECTRONIC AND PRECISION EQUIPMENT REPAIR AND MAINTENANCE | $89,775 | 1 |
| 54 | 611710 | EDUCATIONAL SUPPORT SERVICES | $76,890 | 1 |
| 55 | 334220 | RADIO AND TELEVISION BROADCASTING AND WIRELESS COMMUNICATIONS EQUIPMENT MANUFACTURING | $50,880 | 1 |
| 56 | 541380 | TESTING LABORATORIES AND SERVICES | $45,596 | 1 |
| 57 | 324110 | PETROLEUM REFINERIES | $40,456 | 1 |
| 58 | 334519 | OTHER MEASURING AND CONTROLLING DEVICE MANUFACTURING | $26,017 | 2 |
| 59 | 333618 | OTHER ENGINE EQUIPMENT MANUFACTURING | $18,348 | 1 |
| 60 | 811310 | COMMERCIAL AND INDUSTRIAL MACHINERY AND EQUIPMENT (EXCEPT AUTOMOTIVE AND ELECTRONIC) REPAIR AND MAINTENANCE | $12,829 | 1 |
| 61 | 337127 | INSTITUTIONAL FURNITURE MANUFACTURING | $10,486 | 1 |
| 62 | 337215 | SHOWCASE, PARTITION, SHELVING, AND LOCKER MANUFACTURING | $4,583 | 1 |
| 63 | 561492 | COURT REPORTING AND STENOTYPE SERVICES | $1,390 | 1 |