| 1 | 541512 | COMPUTER SYSTEMS DESIGN SERVICES | $11,247,234,880 | 81 |
| 2 | 336611 | SHIP BUILDING AND REPAIRING | $4,513,369,591 | 4 |
| 3 | 541710 | RESEARCH AND DEVELOPMENT IN THE PHYSICAL, ENGINEERING, AND LIFE SCIENCES | $3,282,976,341 | 1 |
| 4 | 624190 | OTHER INDIVIDUAL AND FAMILY SERVICES | $2,191,841,206 | 3 |
| 5 | 541330 | ENGINEERING SERVICES | $2,110,051,771 | 198 |
| 6 | 517919 | ALL OTHER TELECOMMUNICATIONS | $1,841,168,654 | 6 |
| 7 | 541712 | RESEARCH AND DEVELOPMENT IN THE PHYSICAL, ENGINEERING, AND LIFE SCIENCES (EXCEPT BIOTECHNOLOGY) | $1,701,553,554 | 4 |
| 8 | 541519 | OTHER COMPUTER RELATED SERVICES | $1,597,266,067 | 113 |
| 9 | 541614 | PROCESS, PHYSICAL DISTRIBUTION, AND LOGISTICS CONSULTING SERVICES | $1,515,976,213 | 2 |
| 10 | 541611 | ADMINISTRATIVE MANAGEMENT AND GENERAL MANAGEMENT CONSULTING SERVICES | $1,382,346,656 | 110 |
| 11 | 517110 | WIRED TELECOMMUNICATIONS CARRIERS | $1,333,617,105 | 96 |
| 12 | 561210 | FACILITIES SUPPORT SERVICES | $1,242,944,465 | 31 |
| 13 | 541513 | COMPUTER FACILITIES MANAGEMENT SERVICES | $1,034,728,281 | 16 |
| 14 | 541511 | CUSTOM COMPUTER PROGRAMMING SERVICES | $929,977,392 | 32 |
| 15 | 325412 | PHARMACEUTICAL PREPARATION MANUFACTURING | $696,676,135 | 2 |
| 16 | 488111 | AIR TRAFFIC CONTROL | $656,901,181 | 1 |
| 17 | 238210 | ELECTRICAL CONTRACTORS AND OTHER WIRING INSTALLATION CONTRACTORS | $569,493,716 | 7 |
| 18 | 811213 | COMMUNICATION EQUIPMENT REPAIR AND MAINTENANCE | $462,792,298 | 4 |
| 19 | 336411 | AIRCRAFT MANUFACTURING | $328,458,503 | 1 |
| 20 | 541199 | ALL OTHER LEGAL SERVICES | $307,680,111 | 37 |
| 21 | 541715 | RESEARCH AND DEVELOPMENT IN THE PHYSICAL, ENGINEERING, AND LIFE SCIENCES (EXCEPT NANOTECHNOLOGY AND BIOTECHNOLOGY) | $237,308,073 | 9 |
| 22 | 561612 | SECURITY GUARDS AND PATROL SERVICES | $222,072,759 | 4 |
| 23 | 236220 | COMMERCIAL AND INSTITUTIONAL BUILDING CONSTRUCTION | $221,540,607 | 2 |
| 24 | 541990 | ALL OTHER PROFESSIONAL, SCIENTIFIC, AND TECHNICAL SERVICES | $207,015,490 | 29 |
| 25 | 334511 | SEARCH, DETECTION, NAVIGATION, GUIDANCE, AERONAUTICAL, AND NAUTICAL SYSTEM AND INSTRUMENT MANUFACTURING | $132,663,603 | 6 |
| 26 | 237310 | HIGHWAY, STREET, AND BRIDGE CONSTRUCTION | $122,766,577 | 1 |
| 27 | 336414 | GUIDED MISSILE AND SPACE VEHICLE MANUFACTURING | $101,978,516 | 1 |
| 28 | 541211 | OFFICES OF CERTIFIED PUBLIC ACCOUNTANTS | $96,373,652 | 14 |
| 29 | 221310 | WATER SUPPLY AND IRRIGATION SYSTEMS | $83,345,238 | 2 |
| 30 | 221118 | OTHER ELECTRIC POWER GENERATION | $81,286,492 | 2 |
| 31 | 541690 | OTHER SCIENTIFIC AND TECHNICAL CONSULTING SERVICES | $79,215,995 | 13 |
| 32 | 332999 | ALL OTHER MISCELLANEOUS FABRICATED METAL PRODUCT MANUFACTURING | $79,040,099 | 1 |
| 33 | 518210 | DATA PROCESSING, HOSTING, AND RELATED SERVICES | $69,923,351 | 11 |
| 34 | 811219 | OTHER ELECTRONIC AND PRECISION EQUIPMENT REPAIR AND MAINTENANCE | $67,358,623 | 2 |
| 35 | 561720 | JANITORIAL SERVICES | $57,931,996 | 6 |
| 36 | 541620 | ENVIRONMENTAL CONSULTING SERVICES | $45,078,842 | 5 |
| 37 | 493190 | OTHER WAREHOUSING AND STORAGE | $44,151,917 | 1 |
| 38 | 621111 | OFFICES OF PHYSICIANS (EXCEPT MENTAL HEALTH SPECIALISTS) | $43,054,794 | 3 |
| 39 | 541310 | ARCHITECTURAL SERVICES | $35,954,481 | 7 |
| 40 | 541350 | BUILDING INSPECTION SERVICES | $34,535,642 | 1 |
| 41 | 517911 | TELECOMMUNICATIONS RESELLERS | $32,433,330 | 2 |
| 42 | 334517 | IRRADIATION APPARATUS MANUFACTURING | $31,628,649 | 1 |
| 43 | 541613 | MARKETING CONSULTING SERVICES | $29,832,713 | 4 |
| 44 | 541612 | HUMAN RESOURCES CONSULTING SERVICES (2007), HUMAN RESOURCES AND EXECUTIVE SEARCH CONSULTING SERVICES (2002) | $25,459,322 | 2 |
| 45 | 334111 | ELECTRONIC COMPUTER MANUFACTURING | $22,871,517 | 11 |
| 46 | 423850 | SERVICE ESTABLISHMENT EQUIPMENT AND SUPPLIES MERCHANT WHOLESALERS | $22,251,032 | 2 |
| 47 | 236210 | INDUSTRIAL BUILDING CONSTRUCTION | $22,072,761 | 3 |
| 48 | 517311 | WIRED TELECOMMUNICATIONS CARRIERS | $18,590,435 | 2 |
| 49 | 541720 | RESEARCH AND DEVELOPMENT IN THE SOCIAL SCIENCES AND HUMANITIES | $17,201,465 | 4 |
| 50 | 334290 | OTHER COMMUNICATIONS EQUIPMENT MANUFACTURING | $16,964,516 | 1 |
| 51 | 561920 | CONVENTION AND TRADE SHOW ORGANIZERS | $15,445,473 | 2 |
| 52 | 488190 | OTHER SUPPORT ACTIVITIES FOR AIR TRANSPORTATION | $15,008,314 | 2 |
| 53 | 481111 | SCHEDULED PASSENGER AIR TRANSPORTATION | $13,778,611 | 2 |
| 54 | 541810 | ADVERTISING AGENCIES | $12,930,106 | 4 |
| 55 | 541714 | RESEARCH AND DEVELOPMENT IN BIOTECHNOLOGY (EXCEPT NANOBIOTECHNOLOGY) | $12,710,958 | 2 |
| 56 | 541618 | OTHER MANAGEMENT CONSULTING SERVICES | $11,868,380 | 6 |
| 57 | 511210 | SOFTWARE PUBLISHERS | $10,563,856 | 10 |
| 58 | 561440 | COLLECTION AGENCIES | $10,301,784 | 1 |
| 59 | 611420 | COMPUTER TRAINING | $8,933,023 | 1 |
| 60 | 443120 | COMPUTER AND SOFTWARE STORES | $7,143,677 | 3 |
| 61 | 492110 | COURIERS AND EXPRESS DELIVERY SERVICES | $6,710,102 | 1 |
| 62 | 561611 | INVESTIGATION AND PERSONAL BACKGROUND CHECK SERVICES | $6,660,482 | 2 |
| 63 | 532283 | HOME HEALTH EQUIPMENT RENTAL | $5,987,601 | 1 |
| 64 | 561499 | ALL OTHER BUSINESS SUPPORT SERVICES | $5,563,604 | 2 |
| 65 | 423430 | COMPUTER AND COMPUTER PERIPHERAL EQUIPMENT AND SOFTWARE MERCHANT WHOLESALERS | $3,562,839 | 13 |
| 66 | 562910 | REMEDIATION SERVICES | $3,511,806 | 4 |
| 67 | 561421 | TELEPHONE ANSWERING SERVICES | $3,270,894 | 1 |
| 68 | 512110 | MOTION PICTURE AND VIDEO PRODUCTION | $2,861,946 | 1 |
| 69 | 339999 | ALL OTHER MISCELLANEOUS MANUFACTURING | $2,613,011 | 4 |
| 70 | 541930 | TRANSLATION AND INTERPRETATION SERVICES | $2,574,613 | 3 |
| 71 | 561621 | SECURITY SYSTEMS SERVICES (EXCEPT LOCKSMITHS) | $2,544,464 | 8 |
| 72 | 611430 | PROFESSIONAL AND MANAGEMENT DEVELOPMENT TRAINING | $2,199,678 | 9 |
| 73 | 334220 | RADIO AND TELEVISION BROADCASTING AND WIRELESS COMMUNICATIONS EQUIPMENT MANUFACTURING | $2,096,963 | 3 |
| 74 | 519120 | LIBRARIES AND ARCHIVES | $2,056,838 | 1 |
| 75 | 541110 | OFFICES OF LAWYERS | $1,831,138 | 2 |
| 76 | 621511 | MEDICAL LABORATORIES | $1,756,263 | 1 |
| 77 | 334516 | ANALYTICAL LABORATORY INSTRUMENT MANUFACTURING | $1,736,090 | 8 |
| 78 | 561510 | TRAVEL AGENCIES | $1,493,607 | 1 |
| 79 | 334419 | OTHER ELECTRONIC COMPONENT MANUFACTURING | $1,421,943 | 1 |
| 80 | 333316 | PHOTOGRAPHIC AND PHOTOCOPYING EQUIPMENT MANUFACTURING | $1,346,173 | 7 |
| 81 | 316210 | FOOTWEAR MANUFACTURING | $1,240,453 | 1 |
| 82 | 811212 | COMPUTER AND OFFICE MACHINE REPAIR AND MAINTENANCE | $975,410 | 3 |
| 83 | 541910 | MARKETING RESEARCH AND PUBLIC OPINION POLLING | $964,800 | 2 |
| 84 | 561730 | LANDSCAPING SERVICES | $870,134 | 1 |
| 85 | 322299 | ALL OTHER CONVERTED PAPER PRODUCT MANUFACTURING | $804,164 | 1 |
| 86 | 541430 | GRAPHIC DESIGN SERVICES | $800,007 | 5 |
| 87 | 561422 | TELEMARKETING BUREAUS AND OTHER CONTACT CENTERS | $686,622 | 1 |
| 88 | 522310 | MORTGAGE AND NONMORTGAGE LOAN BROKERS | $565,864 | 6 |
| 89 | 531210 | OFFICES OF REAL ESTATE AGENTS AND BROKERS | $490,518 | 8 |
| 90 | 561450 | CREDIT BUREAUS | $485,576 | 1 |
| 91 | 561110 | OFFICE ADMINISTRATIVE SERVICES | $416,293 | 2 |
| 92 | 621999 | ALL OTHER MISCELLANEOUS AMBULATORY HEALTH CARE SERVICES | $340,289 | 1 |
| 93 | 334519 | OTHER MEASURING AND CONTROLLING DEVICE MANUFACTURING | $311,979 | 1 |
| 94 | 541219 | OTHER ACCOUNTING SERVICES | $252,782 | 1 |
| 95 | 238910 | SITE PREPARATION CONTRACTORS | $232,217 | 1 |
| 96 | 337127 | INSTITUTIONAL FURNITURE MANUFACTURING | $231,779 | 2 |
| 97 | 518111 | INTERNET SERVICE PROVIDERS | $204,510 | 1 |
| 98 | 339920 | SPORTING AND ATHLETIC GOODS MANUFACTURING | $203,011 | 1 |
| 99 | 314910 | TEXTILE BAG AND CANVAS MILLS | $190,835 | 1 |
| 100 | 337214 | OFFICE FURNITURE (EXCEPT WOOD) MANUFACTURING | $178,742 | 3 |