| 1 | 541715 | RESEARCH AND DEVELOPMENT IN THE PHYSICAL, ENGINEERING, AND LIFE SCIENCES (EXCEPT NANOTECHNOLOGY AND BIOTECHNOLOGY) | $14,786,222,263 | 5 |
| 2 | 524114 | DIRECT HEALTH AND MEDICAL INSURANCE CARRIERS | $1,751,070,289 | 2 |
| 3 | 511199 | ALL OTHER PUBLISHERS | $794,643,764 | 1 |
| 4 | 336411 | AIRCRAFT MANUFACTURING | $585,076,138 | 2 |
| 5 | 611519 | OTHER TECHNICAL AND TRADE SCHOOLS | $274,299,930 | 3 |
| 6 | 334517 | IRRADIATION APPARATUS MANUFACTURING | $221,381,740 | 1 |
| 7 | 541511 | CUSTOM COMPUTER PROGRAMMING SERVICES | $52,823,319 | 1 |
| 8 | 334419 | OTHER ELECTRONIC COMPONENT MANUFACTURING | $50,154,262 | 24 |
| 9 | 541611 | ADMINISTRATIVE MANAGEMENT AND GENERAL MANAGEMENT CONSULTING SERVICES | $37,001,356 | 7 |
| 10 | 236220 | COMMERCIAL AND INSTITUTIONAL BUILDING CONSTRUCTION | $25,043,157 | 2 |
| 11 | 541620 | ENVIRONMENTAL CONSULTING SERVICES | $23,454,746 | 4 |
| 12 | 325414 | BIOLOGICAL PRODUCT (EXCEPT DIAGNOSTIC) MANUFACTURING | $18,767,188 | 1 |
| 13 | 541330 | ENGINEERING SERVICES | $17,419,996 | 12 |
| 14 | 562910 | REMEDIATION SERVICES | $11,671,790 | 6 |
| 15 | 812930 | PARKING LOTS AND GARAGES | $7,366,240 | 1 |
| 16 | 561320 | TEMPORARY HELP SERVICES | $5,332,167 | 2 |
| 17 | 541690 | OTHER SCIENTIFIC AND TECHNICAL CONSULTING SERVICES | $5,027,390 | 8 |
| 18 | 493110 | GENERAL WAREHOUSING AND STORAGE | $4,167,562 | 1 |
| 19 | 923120 | ADMINISTRATION OF PUBLIC HEALTH PROGRAMS | $3,359,200 | 2 |
| 20 | 339113 | SURGICAL APPLIANCE AND SUPPLIES MANUFACTURING | $3,242,081 | 6 |
| 21 | 518210 | DATA PROCESSING, HOSTING, AND RELATED SERVICES | $2,969,464 | 1 |
| 22 | 336611 | SHIP BUILDING AND REPAIRING | $1,384,789 | 1 |
| 23 | 541519 | OTHER COMPUTER RELATED SERVICES | $1,227,724 | 6 |
| 24 | 334511 | SEARCH, DETECTION, NAVIGATION, GUIDANCE, AERONAUTICAL, AND NAUTICAL SYSTEM AND INSTRUMENT MANUFACTURING | $1,209,570 | 1 |
| 25 | 221210 | NATURAL GAS DISTRIBUTION | $1,146,792 | 2 |
| 26 | 611310 | COLLEGES, UNIVERSITIES, AND PROFESSIONAL SCHOOLS | $1,107,894 | 5 |
| 27 | 541713 | RESEARCH AND DEVELOPMENT IN NANOTECHNOLOGY | $1,091,058 | 1 |
| 28 | 541618 | OTHER MANAGEMENT CONSULTING SERVICES | $964,705 | 1 |
| 29 | 561110 | OFFICE ADMINISTRATIVE SERVICES | $954,460 | 1 |
| 30 | 541310 | ARCHITECTURAL SERVICES | $948,245 | 1 |
| 31 | 238290 | OTHER BUILDING EQUIPMENT CONTRACTORS | $873,208 | 1 |
| 32 | 333315 | PHOTOGRAPHIC AND PHOTOCOPYING EQUIPMENT MANUFACTURING | $777,053 | 2 |
| 33 | 811212 | COMPUTER AND OFFICE MACHINE REPAIR AND MAINTENANCE | $767,082 | 1 |
| 34 | 333298 | ALL OTHER INDUSTRIAL MACHINERY MANUFACTURING | $641,427 | 1 |
| 35 | 332994 | SMALL ARMS, ORDNANCE, AND ORDNANCE ACCESSORIES MANUFACTURING | $582,684 | 1 |
| 36 | 221122 | ELECTRIC POWER DISTRIBUTION | $566,819 | 1 |
| 37 | 811310 | COMMERCIAL AND INDUSTRIAL MACHINERY AND EQUIPMENT (EXCEPT AUTOMOTIVE AND ELECTRONIC) REPAIR AND MAINTENANCE | $558,883 | 2 |
| 38 | 315210 | CUT AND SEW APPAREL CONTRACTORS | $555,750 | 1 |
| 39 | 517110 | WIRED TELECOMMUNICATIONS CARRIERS | $541,573 | 1 |
| 40 | 327991 | CUT STONE AND STONE PRODUCT MANUFACTURING | $380,521 | 3 |
| 41 | 334111 | ELECTRONIC COMPUTER MANUFACTURING | $349,700 | 1 |
| 42 | 334516 | ANALYTICAL LABORATORY INSTRUMENT MANUFACTURING | $316,725 | 2 |
| 43 | 541712 | RESEARCH AND DEVELOPMENT IN THE PHYSICAL, ENGINEERING, AND LIFE SCIENCES (EXCEPT BIOTECHNOLOGY) | $248,000 | 2 |
| 44 | 541199 | ALL OTHER LEGAL SERVICES | $244,682 | 3 |
| 45 | 311119 | OTHER ANIMAL FOOD MANUFACTURING | $194,684 | 1 |
| 46 | 325998 | ALL OTHER MISCELLANEOUS CHEMICAL PRODUCT AND PREPARATION MANUFACTURING | $163,169 | 3 |
| 47 | 238220 | PLUMBING, HEATING, AND AIR-CONDITIONING CONTRACTORS | $141,000 | 1 |
| 48 | 339112 | SURGICAL AND MEDICAL INSTRUMENT MANUFACTURING | $128,293 | 2 |
| 49 | 336112 | LIGHT TRUCK AND UTILITY VEHICLE MANUFACTURING | $120,777 | 1 |
| 50 | 334510 | ELECTROMEDICAL AND ELECTROTHERAPEUTIC APPARATUS MANUFACTURING | $109,383 | 1 |
| 51 | 561790 | OTHER SERVICES TO BUILDINGS AND DWELLINGS | $109,106 | 1 |
| 52 | 221310 | WATER SUPPLY AND IRRIGATION SYSTEMS | $99,495 | 1 |
| 53 | 315220 | MEN'S AND BOYS' CUT AND SEW APPAREL MANUFACTURING | $83,601 | 1 |
| 54 | 811219 | OTHER ELECTRONIC AND PRECISION EQUIPMENT REPAIR AND MAINTENANCE | $69,634 | 1 |
| 55 | 561710 | EXTERMINATING AND PEST CONTROL SERVICES | $57,126 | 2 |
| 56 | 337214 | OFFICE FURNITURE (EXCEPT WOOD) MANUFACTURING | $47,556 | 1 |
| 57 | 561499 | ALL OTHER BUSINESS SUPPORT SERVICES | $33,775 | 1 |
| 58 | 238310 | DRYWALL AND INSULATION CONTRACTORS | $29,583 | 1 |
| 59 | 541990 | ALL OTHER PROFESSIONAL, SCIENTIFIC, AND TECHNICAL SERVICES | $26,560 | 2 |
| 60 | 532490 | OTHER COMMERCIAL AND INDUSTRIAL MACHINERY AND EQUIPMENT RENTAL AND LEASING | $25,075 | 1 |
| 61 | 562111 | SOLID WASTE COLLECTION | $22,348 | 2 |
| 62 | 335999 | ALL OTHER MISCELLANEOUS ELECTRICAL EQUIPMENT AND COMPONENT MANUFACTURING | $22,239 | 1 |
| 63 | 335932 | NONCURRENT-CARRYING WIRING DEVICE MANUFACTURING | $20,983 | 1 |
| 64 | 337127 | INSTITUTIONAL FURNITURE MANUFACTURING | $19,606 | 1 |
| 65 | 339991 | GASKET, PACKING, AND SEALING DEVICE MANUFACTURING | $12,174 | 1 |
| 66 | 332991 | BALL AND ROLLER BEARING MANUFACTURING | $8,895 | 1 |
| 67 | 531320 | OFFICES OF REAL ESTATE APPRAISERS | $878 | 1 |
| 68 | 332510 | HARDWARE MANUFACTURING | $625 | 1 |
| 69 | 621410 | FAMILY PLANNING CENTERS | $447 | 1 |