| 1 | 541512 | COMPUTER SYSTEMS DESIGN SERVICES | $2,745,484,889 | 18 |
| 2 | 541519 | OTHER COMPUTER RELATED SERVICES | $616,287,828 | 62 |
| 3 | 511210 | SOFTWARE PUBLISHERS | $215,868,248 | 17 |
| 4 | 541511 | CUSTOM COMPUTER PROGRAMMING SERVICES | $94,069,051 | 11 |
| 5 | 811210 | ELECTRONIC AND PRECISION EQUIPMENT REPAIR AND MAINTENANCE | $81,416,250 | 1 |
| 6 | 611519 | OTHER TECHNICAL AND TRADE SCHOOLS | $76,153,805 | 1 |
| 7 | 561210 | FACILITIES SUPPORT SERVICES | $70,800,684 | 7 |
| 8 | 517911 | TELECOMMUNICATIONS RESELLERS | $63,305,248 | 1 |
| 9 | 541513 | COMPUTER FACILITIES MANAGEMENT SERVICES | $52,101,502 | 6 |
| 10 | 517112 | WIRELESS TELECOMMUNICATIONS CARRIERS (EXCEPT SATELLITE) | $51,652,180 | 1 |
| 11 | 541715 | RESEARCH AND DEVELOPMENT IN THE PHYSICAL, ENGINEERING, AND LIFE SCIENCES (EXCEPT NANOTECHNOLOGY AND BIOTECHNOLOGY) | $35,239,976 | 3 |
| 12 | 561612 | SECURITY GUARDS AND PATROL SERVICES | $31,035,110 | 1 |
| 13 | 541611 | ADMINISTRATIVE MANAGEMENT AND GENERAL MANAGEMENT CONSULTING SERVICES | $23,010,385 | 17 |
| 14 | 423850 | SERVICE ESTABLISHMENT EQUIPMENT AND SUPPLIES MERCHANT WHOLESALERS | $14,276,920 | 3 |
| 15 | 518210 | DATA PROCESSING, HOSTING, AND RELATED SERVICES | $13,877,485 | 6 |
| 16 | 541620 | ENVIRONMENTAL CONSULTING SERVICES | $10,231,803 | 2 |
| 17 | 238160 | ROOFING CONTRACTORS | $9,711,922 | 1 |
| 18 | 334290 | OTHER COMMUNICATIONS EQUIPMENT MANUFACTURING | $9,389,524 | 1 |
| 19 | 236210 | INDUSTRIAL BUILDING CONSTRUCTION | $9,247,572 | 1 |
| 20 | 561510 | TRAVEL AGENCIES | $8,468,940 | 2 |
| 21 | 541330 | ENGINEERING SERVICES | $8,203,397 | 9 |
| 22 | 541612 | HUMAN RESOURCES CONSULTING SERVICES (2007), HUMAN RESOURCES AND EXECUTIVE SEARCH CONSULTING SERVICES (2002) | $7,170,368 | 3 |
| 23 | 339999 | ALL OTHER MISCELLANEOUS MANUFACTURING | $6,831,344 | 10 |
| 24 | 541618 | OTHER MANAGEMENT CONSULTING SERVICES | $6,520,734 | 3 |
| 25 | 561110 | OFFICE ADMINISTRATIVE SERVICES | $6,438,629 | 5 |
| 26 | 722310 | FOOD SERVICE CONTRACTORS | $3,895,207 | 1 |
| 27 | 481211 | NONSCHEDULED CHARTERED PASSENGER AIR TRANSPORTATION | $3,696,331 | 1 |
| 28 | 334220 | RADIO AND TELEVISION BROADCASTING AND WIRELESS COMMUNICATIONS EQUIPMENT MANUFACTURING | $2,571,566 | 1 |
| 29 | 541990 | ALL OTHER PROFESSIONAL, SCIENTIFIC, AND TECHNICAL SERVICES | $2,329,358 | 3 |
| 30 | 541930 | TRANSLATION AND INTERPRETATION SERVICES | $2,249,237 | 16 |
| 31 | 238210 | ELECTRICAL CONTRACTORS AND OTHER WIRING INSTALLATION CONTRACTORS | $1,287,556 | 1 |
| 32 | 236220 | COMMERCIAL AND INSTITUTIONAL BUILDING CONSTRUCTION | $1,244,250 | 2 |
| 33 | 541690 | OTHER SCIENTIFIC AND TECHNICAL CONSULTING SERVICES | $1,243,161 | 1 |
| 34 | 519290 | WEB SEARCH PORTALS AND ALL OTHER INFORMATION SERVICES | $1,236,248 | 1 |
| 35 | 611430 | PROFESSIONAL AND MANAGEMENT DEVELOPMENT TRAINING | $1,151,118 | 1 |
| 36 | 561621 | SECURITY SYSTEMS SERVICES (EXCEPT LOCKSMITHS) | $727,801 | 1 |
| 37 | 337214 | OFFICE FURNITURE (EXCEPT WOOD) MANUFACTURING | $491,284 | 4 |
| 38 | 541613 | MARKETING CONSULTING SERVICES | $427,894 | 1 |
| 39 | 541720 | RESEARCH AND DEVELOPMENT IN THE SOCIAL SCIENCES AND HUMANITIES | $217,715 | 1 |
| 40 | 611310 | COLLEGES, UNIVERSITIES, AND PROFESSIONAL SCHOOLS | $217,589 | 1 |
| 41 | 325412 | PHARMACEUTICAL PREPARATION MANUFACTURING | $211,477 | 1 |
| 42 | 517111 | WIRED TELECOMMUNICATIONS CARRIERS | $178,554 | 1 |
| 43 | 541211 | OFFICES OF CERTIFIED PUBLIC ACCOUNTANTS | $160,706 | 1 |
| 44 | 516210 | MEDIA STREAMING DISTRIBUTION SERVICES, SOCIAL NETWORKS, AND OTHER MEDIA NETWORKS AND CONTENT PROVIDERS | $153,425 | 1 |
| 45 | 562910 | REMEDIATION SERVICES | $148,977 | 1 |
| 46 | 334516 | ANALYTICAL LABORATORY INSTRUMENT MANUFACTURING | $132,318 | 2 |
| 47 | 811310 | COMMERCIAL AND INDUSTRIAL MACHINERY AND EQUIPMENT (EXCEPT AUTOMOTIVE AND ELECTRONIC) REPAIR AND MAINTENANCE | $132,200 | 1 |
| 48 | 335999 | ALL OTHER MISCELLANEOUS ELECTRICAL EQUIPMENT AND COMPONENT MANUFACTURING | $123,752 | 6 |
| 49 | 336390 | OTHER MOTOR VEHICLE PARTS MANUFACTURING | $120,890 | 1 |
| 50 | 333413 | INDUSTRIAL AND COMMERCIAL FAN AND BLOWER AND AIR PURIFICATION EQUIPMENT MANUFACTURING | $85,956 | 1 |
| 51 | 325120 | INDUSTRIAL GAS MANUFACTURING | $76,313 | 1 |
| 52 | 334111 | ELECTRONIC COMPUTER MANUFACTURING | $76,012 | 1 |
| 53 | 517311 | WIRED TELECOMMUNICATIONS CARRIERS | $68,923 | 1 |
| 54 | 611620 | SPORTS AND RECREATION INSTRUCTION | $54,500 | 1 |
| 55 | 493110 | GENERAL WAREHOUSING AND STORAGE | $51,976 | 4 |
| 56 | 513210 | SOFTWARE PUBLISHERS | $51,925 | 3 |
| 57 | 316998 | ALL OTHER LEATHER GOOD AND ALLIED PRODUCT MANUFACTURING | $31,919 | 1 |
| 58 | 423450 | MEDICAL, DENTAL, AND HOSPITAL EQUIPMENT AND SUPPLIES MERCHANT WHOLESALERS | $13,881 | 7 |
| 59 | 336411 | AIRCRAFT MANUFACTURING | $11,960 | 1 |
| 60 | 315999 | OTHER APPAREL ACCESSORIES AND OTHER APPAREL MANUFACTURING | $11,085 | 1 |
| 61 | 336413 | OTHER AIRCRAFT PARTS AND AUXILIARY EQUIPMENT MANUFACTURING | $4,185 | 1 |
| 62 | 334519 | OTHER MEASURING AND CONTROLLING DEVICE MANUFACTURING | $731 | 1 |