| 1 | 541710 | RESEARCH AND DEVELOPMENT IN THE PHYSICAL, ENGINEERING, AND LIFE SCIENCES | $30,354,931,646 | 1 |
| 2 | 234930 | INDUSTRIAL NONBUILDING STRUCTURE CONSTRUCTION | $17,034,586,106 | 1 |
| 3 | 562211 | HAZARDOUS WASTE TREATMENT AND DISPOSAL | $10,572,904,271 | 4 |
| 4 | 562910 | REMEDIATION SERVICES | $2,225,051,064 | 5 |
| 5 | 541712 | RESEARCH AND DEVELOPMENT IN THE PHYSICAL, ENGINEERING, AND LIFE SCIENCES (EXCEPT BIOTECHNOLOGY) | $232,928,992 | 1 |
| 6 | 237990 | OTHER HEAVY AND CIVIL ENGINEERING CONSTRUCTION | $88,359,721 | 3 |
| 7 | 541330 | ENGINEERING SERVICES | $53,560,157 | 10 |
| 8 | 237110 | WATER AND SEWER LINE AND RELATED STRUCTURES CONSTRUCTION | $34,569,675 | 1 |
| 9 | 561210 | FACILITIES SUPPORT SERVICES | $26,551,767 | 22 |
| 10 | 336611 | SHIP BUILDING AND REPAIRING | $12,892,009 | 15 |
| 11 | 541611 | ADMINISTRATIVE MANAGEMENT AND GENERAL MANAGEMENT CONSULTING SERVICES | $6,970,214 | 5 |
| 12 | 423450 | MEDICAL, DENTAL, AND HOSPITAL EQUIPMENT AND SUPPLIES MERCHANT WHOLESALERS | $4,741,126 | 58 |
| 13 | 236220 | COMMERCIAL AND INSTITUTIONAL BUILDING CONSTRUCTION | $3,226,112 | 1 |
| 14 | 531120 | LESSORS OF NONRESIDENTIAL BUILDINGS (EXCEPT MINIWAREHOUSES) | $3,162,345 | 1 |
| 15 | 325414 | BIOLOGICAL PRODUCT (EXCEPT DIAGNOSTIC) MANUFACTURING | $2,801,198 | 1 |
| 16 | 221122 | ELECTRIC POWER DISTRIBUTION | $2,449,411 | 4 |
| 17 | 541519 | OTHER COMPUTER RELATED SERVICES | $1,906,481 | 4 |
| 18 | 519130 | INTERNET PUBLISHING AND BROADCASTING AND WEB SEARCH PORTALS | $1,898,466 | 1 |
| 19 | 541512 | COMPUTER SYSTEMS DESIGN SERVICES | $1,729,018 | 2 |
| 20 | 541511 | CUSTOM COMPUTER PROGRAMMING SERVICES | $1,255,244 | 1 |
| 21 | 541380 | TESTING LABORATORIES AND SERVICES | $1,139,152 | 2 |
| 22 | 541715 | RESEARCH AND DEVELOPMENT IN THE PHYSICAL, ENGINEERING, AND LIFE SCIENCES (EXCEPT NANOTECHNOLOGY AND BIOTECHNOLOGY) | $1,004,337 | 1 |
| 23 | 511210 | SOFTWARE PUBLISHERS | $995,182 | 1 |
| 24 | 811219 | OTHER ELECTRONIC AND PRECISION EQUIPMENT REPAIR AND MAINTENANCE | $931,392 | 2 |
| 25 | 923120 | ADMINISTRATION OF PUBLIC HEALTH PROGRAMS | $756,325 | 1 |
| 26 | 541199 | ALL OTHER LEGAL SERVICES | $688,583 | 3 |
| 27 | 811310 | COMMERCIAL AND INDUSTRIAL MACHINERY AND EQUIPMENT (EXCEPT AUTOMOTIVE AND ELECTRONIC) REPAIR AND MAINTENANCE | $669,530 | 2 |
| 28 | 541310 | ARCHITECTURAL SERVICES | $565,045 | 1 |
| 29 | 541211 | OFFICES OF CERTIFIED PUBLIC ACCOUNTANTS | $549,168 | 1 |
| 30 | 541990 | ALL OTHER PROFESSIONAL, SCIENTIFIC, AND TECHNICAL SERVICES | $523,497 | 2 |
| 31 | 611430 | PROFESSIONAL AND MANAGEMENT DEVELOPMENT TRAINING | $399,975 | 1 |
| 32 | 541612 | HUMAN RESOURCES CONSULTING SERVICES (2007), HUMAN RESOURCES AND EXECUTIVE SEARCH CONSULTING SERVICES (2002) | $326,387 | 1 |
| 33 | 238290 | OTHER BUILDING EQUIPMENT CONTRACTORS | $302,065 | 3 |
| 34 | 334111 | ELECTRONIC COMPUTER MANUFACTURING | $276,255 | 2 |
| 35 | 541350 | BUILDING INSPECTION SERVICES | $237,453 | 1 |
| 36 | 333241 | FOOD PRODUCT MACHINERY MANUFACTURING | $219,526 | 136 |
| 37 | 238110 | POURED CONCRETE FOUNDATION AND STRUCTURE CONTRACTORS | $211,025 | 1 |
| 38 | 622110 | GENERAL MEDICAL AND SURGICAL HOSPITALS | $164,486 | 1 |
| 39 | 115310 | SUPPORT ACTIVITIES FOR FORESTRY | $137,880 | 1 |
| 40 | 331318 | OTHER ALUMINUM ROLLING, DRAWING, AND EXTRUDING | $134,272 | 1 |
| 41 | 339112 | SURGICAL AND MEDICAL INSTRUMENT MANUFACTURING | $119,093 | 2 |
| 42 | 621511 | MEDICAL LABORATORIES | $116,150 | 1 |
| 43 | 221210 | NATURAL GAS DISTRIBUTION | $78,874 | 1 |
| 44 | 562991 | SEPTIC TANK AND RELATED SERVICES | $72,680 | 2 |
| 45 | 334310 | AUDIO AND VIDEO EQUIPMENT MANUFACTURING | $66,477 | 1 |
| 46 | 611519 | OTHER TECHNICAL AND TRADE SCHOOLS | $40,890 | 2 |
| 47 | 541620 | ENVIRONMENTAL CONSULTING SERVICES | $35,763 | 1 |
| 48 | 325413 | IN-VITRO DIAGNOSTIC SUBSTANCE MANUFACTURING | $30,624 | 1 |
| 49 | 238150 | GLASS AND GLAZING CONTRACTORS | $29,989 | 1 |
| 50 | 238220 | PLUMBING, HEATING, AND AIR-CONDITIONING CONTRACTORS | $25,785 | 1 |
| 51 | 315999 | OTHER APPAREL ACCESSORIES AND OTHER APPAREL MANUFACTURING | $24,441 | 1 |
| 52 | 336112 | LIGHT TRUCK AND UTILITY VEHICLE MANUFACTURING | $20,589 | 1 |
| 53 | 238990 | ALL OTHER SPECIALTY TRADE CONTRACTORS | $19,154 | 3 |
| 54 | 518210 | DATA PROCESSING, HOSTING, AND RELATED SERVICES | $18,573 | 1 |
| 55 | 423610 | ELECTRICAL APPARATUS AND EQUIPMENT, WIRING SUPPLIES, AND RELATED EQUIPMENT MERCHANT WHOLESALERS | $18,555 | 1 |
| 56 | 237310 | HIGHWAY, STREET, AND BRIDGE CONSTRUCTION | $13,657 | 2 |
| 57 | 484210 | USED HOUSEHOLD AND OFFICE GOODS MOVING | $13,080 | 1 |
| 58 | 517410 | SATELLITE TELECOMMUNICATIONS | $12,795 | 1 |
| 59 | 332322 | SHEET METAL WORK MANUFACTURING | $12,697 | 2 |
| 60 | 336991 | MOTORCYCLE, BICYCLE, AND PARTS MANUFACTURING | $12,298 | 1 |
| 61 | 562111 | SOLID WASTE COLLECTION | $12,261 | 1 |
| 62 | 337215 | SHOWCASE, PARTITION, SHELVING, AND LOCKER MANUFACTURING | $11,672 | 1 |
| 63 | 334516 | ANALYTICAL LABORATORY INSTRUMENT MANUFACTURING | $10,000 | 1 |
| 64 | 327310 | CEMENT MANUFACTURING | $7,035 | 1 |
| 65 | 332510 | HARDWARE MANUFACTURING | $6,150 | 1 |
| 66 | 541690 | OTHER SCIENTIFIC AND TECHNICAL CONSULTING SERVICES | $2,720 | 1 |
| 67 | 332999 | ALL OTHER MISCELLANEOUS FABRICATED METAL PRODUCT MANUFACTURING | $2,130 | 1 |