| 1 | 524114 | DIRECT HEALTH AND MEDICAL INSURANCE CARRIERS | $1,676,618,175 | 2 |
| 2 | 237310 | HIGHWAY, STREET, AND BRIDGE CONSTRUCTION | $255,325,449 | 1 |
| 3 | 541512 | COMPUTER SYSTEMS DESIGN SERVICES | $48,622,688 | 3 |
| 4 | 561499 | ALL OTHER BUSINESS SUPPORT SERVICES | $16,478,515 | 1 |
| 5 | 561210 | FACILITIES SUPPORT SERVICES | $11,478,767 | 10 |
| 6 | 237130 | POWER AND COMMUNICATION LINE AND RELATED STRUCTURES CONSTRUCTION | $11,187,513 | 1 |
| 7 | 483111 | DEEP SEA FREIGHT TRANSPORTATION | $9,559,639 | 6 |
| 8 | 541611 | ADMINISTRATIVE MANAGEMENT AND GENERAL MANAGEMENT CONSULTING SERVICES | $6,516,606 | 6 |
| 9 | 541519 | OTHER COMPUTER RELATED SERVICES | $5,232,814 | 16 |
| 10 | 541330 | ENGINEERING SERVICES | $4,258,123 | 6 |
| 11 | 236210 | INDUSTRIAL BUILDING CONSTRUCTION | $3,768,423 | 1 |
| 12 | 335313 | SWITCHGEAR AND SWITCHBOARD APPARATUS MANUFACTURING | $2,694,277 | 3 |
| 13 | 561621 | SECURITY SYSTEMS SERVICES (EXCEPT LOCKSMITHS) | $2,224,920 | 2 |
| 14 | 236220 | COMMERCIAL AND INSTITUTIONAL BUILDING CONSTRUCTION | $1,751,931 | 1 |
| 15 | 541618 | OTHER MANAGEMENT CONSULTING SERVICES | $1,071,696 | 1 |
| 16 | 541715 | RESEARCH AND DEVELOPMENT IN THE PHYSICAL, ENGINEERING, AND LIFE SCIENCES (EXCEPT NANOTECHNOLOGY AND BIOTECHNOLOGY) | $700,000 | 1 |
| 17 | 518210 | DATA PROCESSING, HOSTING, AND RELATED SERVICES | $532,348 | 1 |
| 18 | 541690 | OTHER SCIENTIFIC AND TECHNICAL CONSULTING SERVICES | $439,551 | 1 |
| 19 | 541620 | ENVIRONMENTAL CONSULTING SERVICES | $418,094 | 2 |
| 20 | 541211 | OFFICES OF CERTIFIED PUBLIC ACCOUNTANTS | $375,731 | 1 |
| 21 | 541511 | CUSTOM COMPUTER PROGRAMMING SERVICES | $366,739 | 1 |
| 22 | 115310 | SUPPORT ACTIVITIES FOR FORESTRY | $345,927 | 4 |
| 23 | 423850 | SERVICE ESTABLISHMENT EQUIPMENT AND SUPPLIES MERCHANT WHOLESALERS | $313,264 | 690 |
| 24 | 513210 | SOFTWARE PUBLISHERS | $171,208 | 2 |
| 25 | 332999 | ALL OTHER MISCELLANEOUS FABRICATED METAL PRODUCT MANUFACTURING | $110,796 | 2 |
| 26 | 336413 | OTHER AIRCRAFT PARTS AND AUXILIARY EQUIPMENT MANUFACTURING | $93,940 | 1 |
| 27 | 311812 | COMMERCIAL BAKERIES | $73,631 | 2 |
| 28 | 336611 | SHIP BUILDING AND REPAIRING | $70,048 | 3 |
| 29 | 721110 | HOTELS (EXCEPT CASINO HOTELS) AND MOTELS | $66,716 | 6 |
| 30 | 561110 | OFFICE ADMINISTRATIVE SERVICES | $56,021 | 1 |
| 31 | 423430 | COMPUTER AND COMPUTER PERIPHERAL EQUIPMENT AND SOFTWARE MERCHANT WHOLESALERS | $52,638 | 1 |
| 32 | 423610 | ELECTRICAL APPARATUS AND EQUIPMENT, WIRING SUPPLIES, AND RELATED EQUIPMENT MERCHANT WHOLESALERS | $41,425 | 1 |
| 33 | 621420 | OUTPATIENT MENTAL HEALTH AND SUBSTANCE ABUSE CENTERS | $35,000 | 1 |
| 34 | 339112 | SURGICAL AND MEDICAL INSTRUMENT MANUFACTURING | $32,907 | 1 |
| 35 | 334310 | AUDIO AND VIDEO EQUIPMENT MANUFACTURING | $32,500 | 1 |
| 36 | 811111 | GENERAL AUTOMOTIVE REPAIR | $28,673 | 2 |
| 37 | 334516 | ANALYTICAL LABORATORY INSTRUMENT MANUFACTURING | $22,019 | 1 |
| 38 | 339920 | SPORTING AND ATHLETIC GOODS MANUFACTURING | $21,627 | 1 |
| 39 | 315990 | APPAREL ACCESSORIES AND OTHER APPAREL MANUFACTURING | $20,791 | 2 |
| 40 | 337214 | OFFICE FURNITURE (EXCEPT WOOD) MANUFACTURING | $20,059 | 21 |
| 41 | 332215 | METAL KITCHEN COOKWARE, UTENSIL, CUTLERY, AND FLATWARE (EXCEPT PRECIOUS) MANUFACTURING | $19,605 | 8 |
| 42 | 333618 | OTHER ENGINE EQUIPMENT MANUFACTURING | $16,459 | 7 |
| 43 | 562111 | SOLID WASTE COLLECTION | $14,345 | 1 |
| 44 | 561720 | JANITORIAL SERVICES | $12,462 | 1 |
| 45 | 311511 | FLUID MILK MANUFACTURING | $9,960 | 12 |
| 46 | 311999 | ALL OTHER MISCELLANEOUS FOOD MANUFACTURING | $9,553 | 1 |
| 47 | 333415 | AIR-CONDITIONING AND WARM AIR HEATING EQUIPMENT AND COMMERCIAL AND INDUSTRIAL REFRIGERATION EQUIPMENT MANUFACTURING | $7,664 | 1 |
| 48 | 314999 | ALL OTHER MISCELLANEOUS TEXTILE PRODUCT MILLS | $7,035 | 15 |
| 49 | 813311 | HUMAN RIGHTS ORGANIZATIONS | $6,000 | 1 |
| 50 | 325611 | SOAP AND OTHER DETERGENT MANUFACTURING | $5,574 | 2 |
| 51 | 335932 | NONCURRENT-CARRYING WIRING DEVICE MANUFACTURING | $4,590 | 1 |
| 52 | 562119 | OTHER WASTE COLLECTION | $4,050 | 1 |
| 53 | 541199 | ALL OTHER LEGAL SERVICES | $3,426 | 1 |
| 54 | 335999 | ALL OTHER MISCELLANEOUS ELECTRICAL EQUIPMENT AND COMPONENT MANUFACTURING | $2,618 | 1 |
| 55 | 323113 | COMMERCIAL SCREEN PRINTING | $1,192 | 1 |
| 56 | 332119 | METAL CROWN, CLOSURE, AND OTHER METAL STAMPING (EXCEPT AUTOMOTIVE) | $289 | 1 |