| 1 | 541712 | RESEARCH AND DEVELOPMENT IN THE PHYSICAL, ENGINEERING, AND LIFE SCIENCES (EXCEPT BIOTECHNOLOGY) | $3,100,890,190 | 32 |
| 2 | 611310 | COLLEGES, UNIVERSITIES, AND PROFESSIONAL SCHOOLS | $2,126,044,005 | 1 |
| 3 | 541330 | ENGINEERING SERVICES | $186,680,951 | 19 |
| 4 | 334511 | SEARCH, DETECTION, NAVIGATION, GUIDANCE, AERONAUTICAL, AND NAUTICAL SYSTEM AND INSTRUMENT MANUFACTURING | $123,216,136 | 3 |
| 5 | 523920 | PORTFOLIO MANAGEMENT | $117,595,275 | 1 |
| 6 | 561210 | FACILITIES SUPPORT SERVICES | $115,782,034 | 3 |
| 7 | 541715 | RESEARCH AND DEVELOPMENT IN THE PHYSICAL, ENGINEERING, AND LIFE SCIENCES (EXCEPT NANOTECHNOLOGY AND BIOTECHNOLOGY) | $50,550,466 | 1 |
| 8 | 561612 | SECURITY GUARDS AND PATROL SERVICES | $25,306,926 | 1 |
| 9 | 325211 | PLASTICS MATERIAL AND RESIN MANUFACTURING | $14,372,753 | 1 |
| 10 | 541519 | OTHER COMPUTER RELATED SERVICES | $12,659,277 | 9 |
| 11 | 541380 | TESTING LABORATORIES AND SERVICES | $7,563,407 | 6 |
| 12 | 488190 | OTHER SUPPORT ACTIVITIES FOR AIR TRANSPORTATION | $5,343,230 | 1 |
| 13 | 541310 | ARCHITECTURAL SERVICES | $2,063,489 | 4 |
| 14 | 562910 | REMEDIATION SERVICES | $1,664,862 | 2 |
| 15 | 532490 | OTHER COMMERCIAL AND INDUSTRIAL MACHINERY AND EQUIPMENT RENTAL AND LEASING | $1,580,135 | 1 |
| 16 | 541990 | ALL OTHER PROFESSIONAL, SCIENTIFIC, AND TECHNICAL SERVICES | $1,164,975 | 2 |
| 17 | 562111 | SOLID WASTE COLLECTION | $1,023,871 | 3 |
| 18 | 517312 | WIRELESS TELECOMMUNICATIONS CARRIERS (EXCEPT SATELLITE) | $672,443 | 5 |
| 19 | 541620 | ENVIRONMENTAL CONSULTING SERVICES | $383,616 | 1 |
| 20 | 325412 | PHARMACEUTICAL PREPARATION MANUFACTURING | $325,500 | 2 |
| 21 | 236220 | COMMERCIAL AND INSTITUTIONAL BUILDING CONSTRUCTION | $276,498 | 1 |
| 22 | 325414 | BIOLOGICAL PRODUCT (EXCEPT DIAGNOSTIC) MANUFACTURING | $272,781 | 3 |
| 23 | 339115 | OPHTHALMIC GOODS MANUFACTURING | $243,460 | 1 |
| 24 | 561720 | JANITORIAL SERVICES | $148,524 | 1 |
| 25 | 493190 | OTHER WAREHOUSING AND STORAGE | $143,689 | 1 |
| 26 | 561611 | INVESTIGATION AND PERSONAL BACKGROUND CHECK SERVICES | $134,357 | 2 |
| 27 | 334516 | ANALYTICAL LABORATORY INSTRUMENT MANUFACTURING | $129,147 | 1 |
| 28 | 333314 | OPTICAL INSTRUMENT AND LENS MANUFACTURING | $85,363 | 1 |
| 29 | 812930 | PARKING LOTS AND GARAGES | $84,249 | 1 |
| 30 | 315999 | OTHER APPAREL ACCESSORIES AND OTHER APPAREL MANUFACTURING | $74,970 | 1 |
| 31 | 811219 | OTHER ELECTRONIC AND PRECISION EQUIPMENT REPAIR AND MAINTENANCE | $57,329 | 1 |
| 32 | 423450 | MEDICAL, DENTAL, AND HOSPITAL EQUIPMENT AND SUPPLIES MERCHANT WHOLESALERS | $55,734 | 1 |
| 33 | 336611 | SHIP BUILDING AND REPAIRING | $50,093 | 2 |
| 34 | 314110 | CARPET AND RUG MILLS | $48,052 | 1 |
| 35 | 339113 | SURGICAL APPLIANCE AND SUPPLIES MANUFACTURING | $46,515 | 2 |
| 36 | 337214 | OFFICE FURNITURE (EXCEPT WOOD) MANUFACTURING | $40,949 | 3 |
| 37 | 334419 | OTHER ELECTRONIC COMPONENT MANUFACTURING | $39,425 | 1 |
| 38 | 561613 | ARMORED CAR SERVICES | $38,553 | 1 |
| 39 | 238220 | PLUMBING, HEATING, AND AIR-CONDITIONING CONTRACTORS | $37,337 | 4 |
| 40 | 335312 | MOTOR AND GENERATOR MANUFACTURING | $37,236 | 1 |
| 41 | 561621 | SECURITY SYSTEMS SERVICES (EXCEPT LOCKSMITHS) | $32,372 | 1 |
| 42 | 339944 | CARBON PAPER AND INKED RIBBON MANUFACTURING | $31,991 | 1 |
| 43 | 333319 | OTHER COMMERCIAL AND SERVICE INDUSTRY MACHINERY MANUFACTURING | $24,160 | 1 |
| 44 | 325998 | ALL OTHER MISCELLANEOUS CHEMICAL PRODUCT AND PREPARATION MANUFACTURING | $21,570 | 1 |
| 45 | 238330 | FLOORING CONTRACTORS | $21,500 | 1 |
| 46 | 811310 | COMMERCIAL AND INDUSTRIAL MACHINERY AND EQUIPMENT (EXCEPT AUTOMOTIVE AND ELECTRONIC) REPAIR AND MAINTENANCE | $19,980 | 2 |
| 47 | 518210 | DATA PROCESSING, HOSTING, AND RELATED SERVICES | $18,573 | 1 |
| 48 | 336413 | OTHER AIRCRAFT PARTS AND AUXILIARY EQUIPMENT MANUFACTURING | $17,980 | 1 |
| 49 | 238990 | ALL OTHER SPECIALTY TRADE CONTRACTORS | $16,783 | 2 |
| 50 | 336112 | LIGHT TRUCK AND UTILITY VEHICLE MANUFACTURING | $16,366 | 1 |
| 51 | 333318 | OTHER COMMERCIAL AND SERVICE INDUSTRY MACHINERY MANUFACTURING | $16,104 | 1 |
| 52 | 541611 | ADMINISTRATIVE MANAGEMENT AND GENERAL MANAGEMENT CONSULTING SERVICES | $14,563 | 1 |
| 53 | 541513 | COMPUTER FACILITIES MANAGEMENT SERVICES | $13,201 | 1 |
| 54 | 238190 | OTHER FOUNDATION, STRUCTURE, AND BUILDING EXTERIOR CONTRACTORS | $12,773 | 1 |
| 55 | 334517 | IRRADIATION APPARATUS MANUFACTURING | $11,401 | 1 |
| 56 | 334510 | ELECTROMEDICAL AND ELECTROTHERAPEUTIC APPARATUS MANUFACTURING | $10,801 | 1 |
| 57 | 337122 | NONUPHOLSTERED WOOD HOUSEHOLD FURNITURE MANUFACTURING | $10,156 | 1 |
| 58 | 561730 | LANDSCAPING SERVICES | $8,265 | 1 |
| 59 | 611430 | PROFESSIONAL AND MANAGEMENT DEVELOPMENT TRAINING | $7,931 | 1 |
| 60 | 315220 | MEN'S AND BOYS' CUT AND SEW APPAREL MANUFACTURING | $7,380 | 1 |
| 61 | 335911 | STORAGE BATTERY MANUFACTURING | $7,230 | 1 |
| 62 | 811212 | COMPUTER AND OFFICE MACHINE REPAIR AND MAINTENANCE | $6,501 | 2 |
| 63 | 541512 | COMPUTER SYSTEMS DESIGN SERVICES | $3,215 | 1 |
| 64 | 332613 | SPRING MANUFACTURING | $3,172 | 1 |
| 65 | 332710 | MACHINE SHOPS | $1,700 | 2 |
| 66 | 333921 | ELEVATOR AND MOVING STAIRWAY MANUFACTURING | $1,113 | 1 |
| 67 | 325320 | PESTICIDE AND OTHER AGRICULTURAL CHEMICAL MANUFACTURING | $584 | 1 |
| 68 | 531210 | OFFICES OF REAL ESTATE AGENTS AND BROKERS | $1 | 1 |