| 541330 | Engineering Services | 21,309 | 2,768 | 9.4% | Widely spread |
| 541519 | Other Computer Related Services | 18,972 | 1,948 | 18.4% | Moderately spread |
| 541715 | Research and Development in the Physical, Engineering, and Life Sciences | 16,456 | 4,646 | 8.1% | Widely spread |
| 236220 | Commercial and Institutional Building Construction | 16,383 | 2,687 | 4.2% | Widely spread |
| 336413 | Other Aircraft Parts and Auxiliary Equipment Manufacturing | 11,562 | 934 | 23.4% | Moderately spread |
| 541611 | Administrative Management and General Management Consulting Services | 11,527 | 2,285 | 11.1% | Widely spread |
| 325411 | Medicinal and Botanical Manufacturing | 11,018 | 32 | 99.7% | Very concentrated |
| 339999 | All Other Miscellaneous Manufacturing | 7,620 | 218 | 93.4% | Very concentrated |
| 541990 | All Other Professional, Scientific, and Technical Services | 6,113 | 1,603 | 12.8% | Widely spread |
| 541512 | Computer Systems Design Services | 5,593 | 1,350 | 21.3% | Moderately spread |
| 324110 | Petroleum Refineries | 5,398 | 205 | 35.1% | Concentrated |
| 561210 | Facilities Support Services | 5,362 | 1,137 | 7.7% | Widely spread |
| 541511 | Custom Computer Programming Services | 3,962 | 1,368 | 9.3% | Widely spread |
| 334111 | Electronic Computer Manufacturing | 3,888 | 362 | 32.8% | Concentrated |
| 622110 | General Medical and Surgical Hospitals | 3,683 | 178 | 38% | Concentrated |
| 336611 | Ship Building and Repairing | 3,522 | 477 | 21% | Moderately spread |
| 334516 | Analytical Laboratory Instrument Manufacturing | 3,409 | 540 | 40% | Concentrated |
| 334511 | Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing | 3,319 | 592 | 28.3% | Moderately spread |
| 511210 | Software Publishers | 3,301 | 566 | 47.6% | Concentrated |
| 541620 | Environmental Consulting Services | 3,155 | 677 | 20.8% | Moderately spread |
| 481211 | Nonscheduled Chartered Passenger Air Transportation | 3,153 | 155 | 72.5% | Very concentrated |
| 561320 | Temporary Help Services | 2,936 | 388 | 18.3% | Moderately spread |
| 541712 | Research and Development in the Physical, Engineering, and Life Sciences | 2,924 | 650 | 24.8% | Moderately spread |
| 541310 | Architectural Services | 2,770 | 533 | 8.4% | Widely spread |
| 562910 | Remediation Services | 2,661 | 549 | 25.1% | Moderately spread |
| 115310 | Support Activities for Forestry | 2,651 | 773 | 13.2% | Widely spread |
| 238220 | Plumbing, Heating, and Air-conditioning Contractors | 2,390 | 1,020 | 5.6% | Widely spread |
| 561720 | Janitorial Services | 2,363 | 841 | 11.1% | Widely spread |
| 541690 | Other Scientific and Technical Consulting Services | 2,353 | 687 | 27.6% | Moderately spread |
| 237310 | Highway, Street, and Bridge Construction | 2,332 | 773 | 8.6% | Widely spread |
| 481212 | Nonscheduled Chartered Freight Air Transportation | 2,328 | 112 | 42.5% | Concentrated |
| 334220 | Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing | 2,179 | 455 | 34.5% | Concentrated |
| 339112 | Surgical and Medical Instrument Manufacturing | 2,077 | 318 | 36.7% | Concentrated |
| 623110 | Nursing Care Facilities | 2,072 | 813 | 6% | Widely spread |
| 334517 | Irradiation Apparatus Manufacturing | 1,976 | 76 | 87% | Very concentrated |
| 325412 | Pharmaceutical Preparation Manufacturing | 1,906 | 185 | 58.8% | Very concentrated |
| 811210 | Electronic and Precision Equipment Repair and Maintenance | 1,881 | 608 | 18.5% | Moderately spread |
| 423450 | Medical, Dental, and Hospital Equipment and Supplies Merchant Wholesalers | 1,840 | 136 | 43.1% | Concentrated |
| 561730 | Landscaping Services | 1,723 | 653 | 8.2% | Widely spread |
| 811310 | Commercial and Industrial Machinery and Equipment | 1,661 | 842 | 13.2% | Widely spread |
| 483111 | Deep Sea Freight Transportation | 1,634 | 68 | 57.3% | Very concentrated |
| 518210 | Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services | 1,626 | 585 | 15.2% | Moderately spread |
| 336412 | Aircraft Engine and Engine Parts Manufacturing | 1,620 | 229 | 46.3% | Concentrated |
| 336411 | Aircraft Manufacturing | 1,584 | 206 | 47.9% | Concentrated |
| 488190 | Other Support Activities for Air Transportation | 1,567 | 282 | 29.2% | Moderately spread |
| 811219 | Other Electronic and Precision Equipment Repair and Maintenance | 1,561 | 465 | 15% | Moderately spread |
| 339113 | Surgical Appliance and Supplies Manufacturing | 1,554 | 338 | 27.1% | Moderately spread |
| 611310 | Colleges, Universities, and Professional Schools | 1,541 | 343 | 13.7% | Widely spread |
| 561621 | Security Systems Services | 1,484 | 457 | 30.7% | Concentrated |
| 517110 | Wired Telecommunications Carriers | 1,470 | 79 | 74.8% | Very concentrated |
| 238210 | Electrical Contractors and Other Wiring Installation Contractors | 1,459 | 718 | 13% | Widely spread |
| 333120 | Construction Machinery Manufacturing | 1,422 | 131 | 54.7% | Very concentrated |
| 561612 | Security Guards and Patrol Services | 1,413 | 318 | 32.2% | Concentrated |
| 334290 | Other Communications Equipment Manufacturing | 1,385 | 404 | 31.7% | Concentrated |
| 311999 | All Other Miscellaneous Food Manufacturing | 1,355 | 105 | 44.5% | Concentrated |
| 334419 | Other Electronic Component Manufacturing | 1,280 | 396 | 16.8% | Moderately spread |
| 237990 | Other Heavy and Civil Engineering Construction | 1,278 | 655 | 8.3% | Widely spread |
| 621511 | Medical Laboratories | 1,263 | 225 | 62.8% | Very concentrated |
| 238990 | All Other Specialty Trade Contractors | 1,260 | 459 | 29.7% | Moderately spread |
| 513210 | Software Publishers | 1,222 | 595 | 20.8% | Moderately spread |
| 315210 | Cut and Sew Apparel Contractors | 1,185 | 107 | 28.8% | Moderately spread |
| 611430 | Professional and Management Development Training | 1,157 | 577 | 10.7% | Widely spread |
| 541720 | Research and Development in the Social Sciences and Humanities | 1,148 | 372 | 35.5% | Concentrated |
| 336211 | Motor Vehicle Body Manufacturing | 1,131 | 87 | 58.4% | Very concentrated |
| 337214 | Office Furniture | 1,125 | 182 | 37.3% | Concentrated |
| 541380 | Testing Laboratories and Services | 1,122 | 407 | 24.3% | Moderately spread |
| 332994 | Small Arms, Ordnance, and Ordnance Accessories Manufacturing | 1,109 | 231 | 36.4% | Concentrated |
| 311421 | Fruit and Vegetable Canning | 1,066 | 54 | 38.1% | Concentrated |
| 541614 | Process, Physical Distribution, and Logistics Consulting Services | 1,062 | 260 | 27.4% | Moderately spread |
| 562111 | Solid Waste Collection | 1,019 | 337 | 19.6% | Moderately spread |
| 423850 | Service Establishment Equipment and Supplies Merchant Wholesalers | 1,012 | 13 | 99.8% | Very concentrated |
| 334519 | Other Measuring and Controlling Device Manufacturing | 1,009 | 344 | 25.5% | Moderately spread |
| 561990 | All Other Support Services | 990 | 329 | 40.2% | Concentrated |
| 334412 | Bare Printed Circuit Board Manufacturing | 979 | 197 | 46.8% | Concentrated |
| 561110 | Office Administrative Services | 965 | 378 | 16.6% | Moderately spread |
| 541513 | Computer Facilities Management Services | 959 | 318 | 21.6% | Moderately spread |
| 325413 | In-vitro Diagnostic Substance Manufacturing | 952 | 108 | 50% | Very concentrated |
| 238160 | Roofing Contractors | 951 | 343 | 15.8% | Moderately spread |
| 332510 | Hardware Manufacturing | 931 | 300 | 33.9% | Concentrated |
| 517311 | Wired Telecommunications Carriers | 916 | 140 | 45.6% | Concentrated |
| 424210 | Drugs and Druggists' Sundries Merchant Wholesalers | 915 | 11 | 98.4% | Very concentrated |
| 541199 | All Other Legal Services | 899 | 321 | 28.3% | Moderately spread |
| 221122 | Electric Power Distribution | 888 | 201 | 31.6% | Concentrated |
| 311611 | Animal | 885 | 56 | 37.4% | Concentrated |
| 621111 | Offices of Physicians | 860 | 362 | 14.3% | Widely spread |
| 333618 | Other Engine Equipment Manufacturing | 834 | 190 | 36.2% | Concentrated |
| 311991 | Perishable Prepared Food Manufacturing | 827 | 114 | 40.1% | Concentrated |
| 315990 | Apparel Accessories and Other Apparel Manufacturing | 817 | 165 | 30.5% | Concentrated |
| 336120 | Heavy Duty Truck Manufacturing | 814 | 59 | 60% | Very concentrated |
| 335999 | All Other Miscellaneous Electrical Equipment and Component Manufacturing | 787 | 322 | 37.3% | Concentrated |
| 423610 | Electrical Apparatus and Equipment, Wiring Supplies, and Related Equipment Merchant Wholesalers | 768 | 29 | 95.4% | Very concentrated |
| 311812 | Commercial Bakeries | 753 | 22 | 85.6% | Very concentrated |
| 492110 | Couriers and Express Delivery Services | 747 | 64 | 84.2% | Very concentrated |
| 332911 | Industrial Valve Manufacturing | 722 | 177 | 32.5% | Concentrated |
| 812990 | All Other Personal Services | 719 | 211 | 71.1% | Very concentrated |
| 488310 | Port and Harbor Operations | 718 | 59 | 63.3% | Very concentrated |
| 541714 | Research and Development in Biotechnology | 704 | 408 | 10% | Widely spread |
| 332919 | Other Metal Valve and Pipe Fitting Manufacturing | 703 | 200 | 33.8% | Concentrated |
| 722310 | Food Service Contractors | 700 | 177 | 23.4% | Moderately spread |
| 332999 | All Other Miscellaneous Fabricated Metal Product Manufacturing | 687 | 298 | 22.1% | Moderately spread |
| 611710 | Educational Support Services | 676 | 279 | 24.6% | Moderately spread |
| 541618 | Other Management Consulting Services | 673 | 246 | 38.7% | Concentrated |
| 335312 | Motor and Generator Manufacturing | 671 | 258 | 22.3% | Moderately spread |
| 623990 | Other Residential Care Facilities | 668 | 72 | 43.9% | Concentrated |
| 621910 | Ambulance Services | 638 | 184 | 17.3% | Moderately spread |
| 517312 | Wireless Telecommunications Carriers | 624 | 39 | 91.6% | Very concentrated |
| 721110 | Hotels | 623 | 229 | 33.4% | Concentrated |
| 334510 | Electromedical and Electrotherapeutic Apparatus Manufacturing | 620 | 155 | 32.2% | Concentrated |
| 238290 | Other Building Equipment Contractors | 595 | 246 | 31.3% | Concentrated |
| 337215 | Showcase, Partition, Shelving, and Locker Manufacturing | 584 | 62 | 60.5% | Very concentrated |
| 334515 | Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals | 576 | 231 | 23.8% | Moderately spread |
| 541370 | Surveying and Mapping | 560 | 183 | 34% | Concentrated |
| 541211 | Offices of Certified Public Accountants | 559 | 81 | 55.7% | Very concentrated |
| 532420 | Office Machinery and Equipment Rental and Leasing | 559 | 59 | 63.4% | Very concentrated |
| 236210 | Industrial Building Construction | 556 | 209 | 20.2% | Moderately spread |
| 237110 | Water and Sewer Line and Related Structures Construction | 536 | 334 | 14.2% | Widely spread |
| 532490 | Other Commercial and Industrial Machinery and Equipment Rental and Leasing | 532 | 227 | 22.2% | Moderately spread |
| 541930 | Translation and Interpretation Services | 505 | 124 | 31.1% | Concentrated |
| 332991 | Ball and Roller Bearing Manufacturing | 490 | 117 | 49% | Concentrated |
| 541612 | Human Resources Consulting Services | 481 | 200 | 23.3% | Moderately spread |
| 333310 | Commercial and Service Industry Machinery Manufacturing | 480 | 255 | 17.8% | Moderately spread |
| 336110 | Automobile and Light Duty Motor Vehicle Manufacturing | 478 | 43 | 74.1% | Very concentrated |
| 333998 | All Other Miscellaneous General Purpose Machinery Manufacturing | 474 | 213 | 25.2% | Moderately spread |
| 221210 | Natural Gas Distribution | 474 | 102 | 41.9% | Concentrated |
| 335931 | Current-carrying Wiring Device Manufacturing | 464 | 214 | 19.1% | Moderately spread |
| 311615 | Poultry Processing | 449 | 28 | 55.1% | Very concentrated |
| 493110 | General Warehousing and Storage | 449 | 147 | 29.6% | Moderately spread |
| 336992 | Military Armored Vehicle, Tank, and Tank Component Manufacturing | 449 | 104 | 29.5% | Moderately spread |
| 325120 | Industrial Gas Manufacturing | 448 | 98 | 45.2% | Concentrated |
| 333914 | Measuring, Dispensing, and Other Pumping Equipment Manufacturing | 444 | 181 | 32.7% | Concentrated |
| 332722 | Bolt, Nut, Screw, Rivet, and Washer Manufacturing | 442 | 143 | 51.1% | Very concentrated |
| 621999 | All Other Miscellaneous Ambulatory Health Care Services | 438 | 154 | 24.2% | Moderately spread |
| 541713 | Research and Development in Nanotechnology | 437 | 286 | 13% | Widely spread |
| 221310 | Water Supply and Irrigation Systems | 428 | 229 | 21.2% | Moderately spread |
| 337122 | Nonupholstered Wood Household Furniture Manufacturing | 425 | 38 | 58% | Very concentrated |
| 332439 | Other Metal Container Manufacturing | 419 | 87 | 54.7% | Very concentrated |
| 541219 | Other Accounting Services | 419 | 126 | 29.7% | Moderately spread |
| 519290 | Web Search Portals and All Other Information Services | 417 | 161 | 28.8% | Moderately spread |
| 336390 | Other Motor Vehicle Parts Manufacturing | 415 | 144 | 21.5% | Moderately spread |
| 237130 | Power and Communication Line and Related Structures Construction | 413 | 184 | 15.6% | Moderately spread |
| 517111 | Wired Telecommunications Carriers | 409 | 144 | 29.2% | Moderately spread |
| 336112 | Light Truck and Utility Vehicle Manufacturing | 407 | 35 | 76.8% | Very concentrated |
| 562211 | Hazardous Waste Treatment and Disposal | 407 | 124 | 31.1% | Concentrated |
| 333415 | Air-conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing | 405 | 216 | 29.7% | Moderately spread |
| 311513 | Cheese Manufacturing | 394 | 16 | 65.6% | Very concentrated |
| 493190 | Other Warehousing and Storage | 392 | 56 | 80.3% | Very concentrated |
| 335311 | Power, Distribution, and Specialty Transformer Manufacturing | 389 | 191 | 28.3% | Moderately spread |
| 336111 | Automobile Manufacturing | 384 | 15 | 87.6% | Very concentrated |
| 334513 | Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables | 382 | 201 | 22.1% | Moderately spread |
| 811212 | Computer and Office Machine Repair and Maintenance | 381 | 64 | 79.9% | Very concentrated |
| 444110 | Home Centers | 380 | 1 | 100% | Very concentrated |
| 621399 | Offices of All Other Miscellaneous Health Practitioners | 376 | 147 | 15.8% | Moderately spread |
| 334310 | Audio and Video Equipment Manufacturing | 376 | 206 | 21.9% | Moderately spread |
| 325920 | Explosives Manufacturing | 370 | 55 | 54.9% | Very concentrated |
| 517410 | Satellite Telecommunications | 370 | 102 | 54.6% | Very concentrated |
| 315250 | Cut and Sew Apparel Manufacturing | 370 | 47 | 56.6% | Very concentrated |
| 238910 | Site Preparation Contractors | 369 | 257 | 11.2% | Widely spread |
| 519130 | Internet Publishing and Broadcasting and Web Search Portals | 365 | 138 | 28.3% | Moderately spread |
| 315220 | Men's and Boys' Cut and Sew Apparel Manufacturing | 343 | 47 | 35% | Concentrated |
| 333613 | Mechanical Power Transmission Equipment Manufacturing | 343 | 165 | 22.2% | Moderately spread |
| 517919 | All Other Telecommunications | 335 | 80 | 48.2% | Concentrated |
| 524114 | Direct Health and Medical Insurance Carriers | 332 | 72 | 39.6% | Concentrated |
| 562991 | Septic Tank and Related Services | 332 | 177 | 27.1% | Moderately spread |
| 314910 | Textile Bag and Canvas Mills | 328 | 59 | 62.5% | Very concentrated |
| 621991 | Blood and Organ Banks | 327 | 51 | 67.2% | Very concentrated |
| 517112 | Wireless Telecommunications Carriers | 325 | 49 | 80% | Very concentrated |
| 541110 | Offices of Lawyers | 325 | 129 | 25.8% | Moderately spread |
| 334118 | Computer Terminal and Other Computer Peripheral Equipment Manufacturing | 318 | 136 | 42.9% | Concentrated |
| 621498 | All Other Outpatient Care Centers | 316 | 54 | 70.8% | Very concentrated |
| 221112 | Fossil Fuel Electric Power Generation | 316 | 58 | 49% | Concentrated |
| 333924 | Industrial Truck, Tractor, Trailer, and Stacker Machinery Manufacturing | 315 | 154 | 28.4% | Moderately spread |
| 311411 | Frozen Fruit, Juice, and Vegetable Manufacturing | 313 | 36 | 62.8% | Very concentrated |
| 331410 | Nonferrous Metal | 313 | 6 | 100% | Very concentrated |
| 624221 | Temporary Shelters | 312 | 118 | 25.7% | Moderately spread |
| 314999 | All Other Miscellaneous Textile Product Mills | 307 | 95 | 52.7% | Very concentrated |
| 541810 | Advertising Agencies | 306 | 78 | 51.5% | Very concentrated |
| 621512 | Diagnostic Imaging Centers | 305 | 72 | 57.1% | Very concentrated |
| 611512 | Flight Training | 304 | 69 | 52.5% | Very concentrated |
| 532111 | Passenger Car Rental | 303 | 66 | 54.7% | Very concentrated |
| 332311 | Prefabricated Metal Building and Component Manufacturing | 301 | 139 | 27.2% | Moderately spread |
| 488390 | Other Support Activities for Water Transportation | 300 | 43 | 74.1% | Very concentrated |
| 333996 | Fluid Power Pump and Motor Manufacturing | 296 | 119 | 35.1% | Concentrated |
| 335910 | Battery Manufacturing | 296 | 70 | 39.4% | Concentrated |
| 485991 | Special Needs Transportation | 291 | 61 | 29% | Moderately spread |
| 335313 | Switchgear and Switchboard Apparatus Manufacturing | 290 | 107 | 46.2% | Concentrated |
| 115210 | Support Activities for Animal Production | 289 | 87 | 18.4% | Moderately spread |
| 541910 | Marketing Research and Public Opinion Polling | 286 | 108 | 35.5% | Concentrated |
| 541613 | Marketing Consulting Services | 283 | 93 | 25.6% | Moderately spread |
| 561790 | Other Services to Buildings and Dwellings | 280 | 203 | 15.3% | Moderately spread |
| 561499 | All Other Business Support Services | 278 | 127 | 26.9% | Moderately spread |
| 336612 | Boat Building | 278 | 116 | 37.6% | Concentrated |
| 336414 | Guided Missile and Space Vehicle Manufacturing | 274 | 38 | 77.4% | Very concentrated |
| 611420 | Computer Training | 273 | 98 | 26.1% | Moderately spread |
| 561611 | Investigation and Personal Background Check Services | 273 | 106 | 27.8% | Moderately spread |
| 333413 | Industrial and Commercial Fan and Blower and Air Purification Equipment Manufacturing | 273 | 95 | 50.4% | Very concentrated |
| 813920 | Professional Organizations | 272 | 96 | 42.1% | Concentrated |
| 333517 | Machine Tool Manufacturing | 271 | 139 | 24.6% | Moderately spread |
| 333923 | Overhead Traveling Crane, Hoist, and Monorail System Manufacturing | 271 | 103 | 45.2% | Concentrated |
| 541940 | Veterinary Services | 269 | 76 | 68.3% | Very concentrated |
| 812930 | Parking Lots and Garages | 269 | 110 | 33.5% | Concentrated |
| 481112 | Scheduled Freight Air Transportation | 265 | 27 | 56.7% | Very concentrated |
| 316210 | Footwear Manufacturing | 264 | 24 | 89.9% | Very concentrated |
| 333999 | All Other Miscellaneous General Purpose Machinery Manufacturing | 262 | 84 | 52.8% | Very concentrated |
| 562112 | Hazardous Waste Collection | 259 | 81 | 48.9% | Concentrated |
| 811213 | Communication Equipment Repair and Maintenance | 256 | 96 | 44.8% | Concentrated |
| 339115 | Ophthalmic Goods Manufacturing | 256 | 39 | 79.6% | Very concentrated |
| 621112 | Offices of Physicians, Mental Health Specialists | 255 | 128 | 47.7% | Concentrated |
| 336320 | Motor Vehicle Electrical and Electronic Equipment Manufacturing | 250 | 98 | 34.1% | Concentrated |
| 333611 | Turbine and Turbine Generator Set Units Manufacturing | 248 | 87 | 52.3% | Very concentrated |
| 531311 | Residential Property Managers | 247 | 13 | 82.3% | Very concentrated |
| 332993 | Ammunition | 246 | 78 | 32.7% | Concentrated |
| 333316 | Photographic and Photocopying Equipment Manufacturing | 245 | 21 | 85.8% | Very concentrated |
| 532112 | Passenger Car Leasing | 240 | 89 | 39.6% | Concentrated |
| 332992 | Small Arms Ammunition Manufacturing | 239 | 36 | 77.4% | Very concentrated |
| 325998 | All Other Miscellaneous Chemical Product and Preparation Manufacturing | 239 | 103 | 28.2% | Moderately spread |
| 561710 | Exterminating and Pest Control Services | 236 | 89 | 37.8% | Concentrated |
| 532412 | Construction, Mining, and Forestry Machinery and Equipment Rental and Leasing | 236 | 101 | 41.3% | Concentrated |
| 443120 | Computer and Software Stores | 234 | 35 | 60.3% | Very concentrated |
| 923120 | Administration of Public Health Programs | 233 | 111 | 15.7% | Moderately spread |
| 812332 | Industrial Launderers | 230 | 71 | 35.5% | Concentrated |
| 517911 | Telecommunications Resellers | 228 | 33 | 83.9% | Very concentrated |
| 336419 | Other Guided Missile and Space Vehicle Parts and Auxiliary Equipment Manufacturing | 228 | 66 | 55.6% | Very concentrated |
| 333318 | Other Commercial and Service Industry Machinery Manufacturing | 224 | 76 | 28.5% | Moderately spread |
| 541710 | Research and Development in the Physical, Engineering, and Life Sciences | 224 | 97 | 39.1% | Concentrated |
| 611699 | All Other Miscellaneous Schools and Instruction | 223 | 131 | 26.1% | Moderately spread |
| 488320 | Marine Cargo Handling | 223 | 40 | 41.6% | Concentrated |
| 519190 | All Other Information Services | 221 | 86 | 32.4% | Concentrated |
| 541711 | Research and Development in Biotechnology | 219 | 84 | 33.2% | Concentrated |
| 335314 | Relay and Industrial Control Manufacturing | 215 | 91 | 29.1% | Moderately spread |
| 311511 | Fluid Milk Manufacturing | 215 | 36 | 56.9% | Very concentrated |
| 561920 | Convention and Trade Show Organizers | 214 | 88 | 22.5% | Moderately spread |
| 238390 | Other Building Finishing Contractors | 209 | 69 | 56% | Very concentrated |
| 238320 | Painting and Wall Covering Contractors | 209 | 101 | 34.7% | Concentrated |
| 485410 | School and Employee Bus Transportation | 207 | 47 | 36.2% | Concentrated |
| 334417 | Electronic Connector Manufacturing | 207 | 102 | 28% | Moderately spread |
| 541360 | Geophysical Surveying and Mapping Services | 206 | 41 | 68.5% | Very concentrated |
| 339991 | Gasket, Packing, and Sealing Device Manufacturing | 205 | 96 | 37.9% | Concentrated |
| 484210 | Used Household and Office Goods Moving | 204 | 92 | 28.6% | Moderately spread |
| 485999 | All Other Transit and Ground Passenger Transportation | 203 | 75 | 37% | Concentrated |
| 621420 | Outpatient Mental Health and Substance Abuse Centers | 202 | 49 | 44.4% | Concentrated |
| 531120 | Lessors of Nonresidential Buildings | 201 | 130 | 22% | Moderately spread |
| 812320 | Drycleaning and Laundry Services | 201 | 99 | 31.5% | Concentrated |
| 333314 | Optical Instrument and Lens Manufacturing | 200 | 53 | 45.4% | Concentrated |
| 333912 | Air and Gas Compressor Manufacturing | 199 | 85 | 47.9% | Concentrated |
| 623220 | Residential Mental Health and Substance Abuse Facilities | 196 | 82 | 18.2% | Moderately spread |
| 611519 | Other Technical and Trade Schools | 193 | 88 | 39.2% | Concentrated |
| 339940 | Office Supplies | 190 | 25 | 88.5% | Very concentrated |
| 332710 | Machine Shops | 187 | 122 | 22.7% | Moderately spread |
| 334210 | Telephone Apparatus Manufacturing | 186 | 71 | 43.5% | Concentrated |
| 311211 | Flour Milling | 186 | 17 | 72.9% | Very concentrated |
| 326199 | All Other Plastics Product Manufacturing | 185 | 72 | 47.2% | Concentrated |
| 325414 | Biological Product | 185 | 61 | 47.9% | Concentrated |
| 336212 | Truck Trailer Manufacturing | 183 | 63 | 65.7% | Very concentrated |
| 928120 | International Affairs | 180 | 55 | 64.6% | Very concentrated |
| 541820 | Public Relations Agencies | 166 | 72 | 35.9% | Concentrated |
| 333612 | Speed Changer, Industrial High-speed Drive, and Gear Manufacturing | 166 | 95 | 22.1% | Moderately spread |
| 541350 | Building Inspection Services | 162 | 84 | 51.3% | Very concentrated |
| 336350 | Motor Vehicle Transmission and Power Train Parts Manufacturing | 162 | 62 | 55% | Very concentrated |
| 334418 | Printed Circuit Assembly | 161 | 87 | 26.4% | Moderately spread |
| 337211 | Wood Office Furniture Manufacturing | 155 | 56 | 48.3% | Concentrated |
| 561599 | All Other Travel Arrangement and Reservation Services | 155 | 31 | 82.7% | Very concentrated |
| 334512 | Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use | 152 | 64 | 46.9% | Concentrated |
| 423430 | Computer and Computer Peripheral Equipment and Software Merchant Wholesalers | 152 | 93 | 30.6% | Concentrated |
| 337127 | Institutional Furniture Manufacturing | 151 | 61 | 64.2% | Very concentrated |
| 921190 | Other General Government Support | 151 | 31 | 82.9% | Very concentrated |
| 221320 | Sewage Treatment Facilities | 148 | 89 | 33% | Concentrated |
| 561410 | Document Preparation Services | 147 | 60 | 38.2% | Concentrated |
| 331491 | Nonferrous Metal | 146 | 34 | 89.3% | Very concentrated |
| 332912 | Fluid Power Valve and Hose Fitting Manufacturing | 146 | 65 | 37.3% | Concentrated |
| 332312 | Fabricated Structural Metal Manufacturing | 145 | 90 | 35.9% | Concentrated |
| 327991 | Cut Stone and Stone Product Manufacturing | 144 | 24 | 71.8% | Very concentrated |
| 532283 | Home Health Equipment Rental | 143 | 21 | 56.8% | Very concentrated |
| 335911 | Storage Battery Manufacturing | 142 | 21 | 71.7% | Very concentrated |
| 311225 | Fats and Oils Refining and Blending | 141 | 10 | 86.8% | Very concentrated |
| 332996 | Fabricated Pipe and Pipe Fitting Manufacturing | 141 | 69 | 35% | Concentrated |
| 512110 | Motion Picture and Video Production | 140 | 62 | 54.6% | Very concentrated |
| 339920 | Sporting and Athletic Goods Manufacturing | 140 | 52 | 50.8% | Very concentrated |
| 211130 | Natural Gas Extraction | 140 | 20 | 76.3% | Very concentrated |
| 334413 | Semiconductor and Related Device Manufacturing | 139 | 97 | 25.5% | Moderately spread |
| 531390 | Other Activities Related to Real Estate | 138 | 38 | 53.1% | Very concentrated |
| 221118 | Other Electric Power Generation | 138 | 20 | 70.3% | Very concentrated |
| 624229 | Other Community Housing Services | 136 | 51 | 39.3% | Concentrated |
| 332618 | Other Fabricated Wire Product Manufacturing | 133 | 58 | 42.1% | Concentrated |
| 324191 | Petroleum Lubricating Oil and Grease Manufacturing | 132 | 18 | 90.5% | Very concentrated |
| 334416 | Capacitor, Resistor, Coil, Transformer, and Other Inductor Manufacturing | 131 | 78 | 30.4% | Concentrated |
| 334112 | Computer Storage Device Manufacturing | 128 | 80 | 39.3% | Concentrated |
| 541320 | Landscape Architectural Services | 128 | 32 | 56.8% | Very concentrated |
| 237120 | Oil and Gas Pipeline and Related Structures Construction | 126 | 72 | 30.9% | Concentrated |
| 532411 | Commercial Air, Rail, and Water Transportation Equipment Rental and Leasing | 125 | 22 | 89% | Very concentrated |
| 313210 | Broadwoven Fabric Mills | 125 | 33 | 53.1% | Very concentrated |
| 325510 | Paint and Coating Manufacturing | 125 | 21 | 64.9% | Very concentrated |
| 326299 | All Other Rubber Product Manufacturing | 124 | 45 | 48.6% | Concentrated |
| 311212 | Rice Milling | 124 | 12 | 89.8% | Very concentrated |
| 491110 | Postal Service | 124 | 50 | 53.8% | Very concentrated |
| 423110 | Automobile and Other Motor Vehicle Merchant Wholesalers | 123 | 16 | 78.4% | Very concentrated |
| 441110 | New Car Dealers | 122 | 6 | 99.6% | Very concentrated |
| 425120 | Wholesale Trade Agents and Brokers | 118 | 45 | 33.5% | Concentrated |
| 336310 | Motor Vehicle Gasoline Engine and Engine Parts Manufacturing | 118 | 71 | 34.6% | Concentrated |
| 513120 | Periodical Publishers | 117 | 60 | 36.8% | Concentrated |
| 511120 | Periodical Publishers | 116 | 41 | 52% | Very concentrated |
| 531110 | Lessors of Residential Buildings and Dwellings | 116 | 34 | 46.3% | Concentrated |
| 311710 | Seafood Product Preparation and Packaging | 115 | 30 | 51.5% | Very concentrated |
| 322121 | Paper | 115 | 5 | 100% | Very concentrated |
| 562998 | All Other Miscellaneous Waste Management Services | 115 | 80 | 30.7% | Concentrated |
| 315120 | Apparel Knitting Mills | 115 | 23 | 60.9% | Very concentrated |
| 236118 | Residential Remodelers | 114 | 57 | 52.3% | Very concentrated |
| 336330 | Motor Vehicle Steering and Suspension Components | 112 | 44 | 49.6% | Concentrated |
| 811111 | General Automotive Repair | 111 | 58 | 43.5% | Concentrated |
| 325910 | Printing Ink Manufacturing | 110 | 2 | 100% | Very concentrated |
| 621610 | Home Health Care Services | 109 | 29 | 63.1% | Very concentrated |
| 624230 | Emergency and Other Relief Services | 107 | 52 | 33% | Concentrated |
| 238110 | Poured Concrete Foundation and Structure Contractors | 106 | 62 | 36.2% | Concentrated |
| 562119 | Other Waste Collection | 106 | 59 | 49.3% | Concentrated |
| 334514 | Totalizing Fluid Meter and Counting Device Manufacturing | 106 | 69 | 30.7% | Concentrated |
| 339114 | Dental Equipment and Supplies Manufacturing | 105 | 31 | 70.4% | Very concentrated |
| 311423 | Dried and Dehydrated Food Manufacturing | 104 | 29 | 56.1% | Very concentrated |
| 333248 | All Other Industrial Machinery Manufacturing | 104 | 75 | 25.6% | Moderately spread |
| 621340 | Offices of Physical, Occupational and Speech Therapists, and Audiologists | 103 | 54 | 35.3% | Concentrated |
| 532120 | Truck, Utility Trailer, and RV | 103 | 57 | 48.8% | Concentrated |
| 332216 | Saw Blade and Handtool Manufacturing | 102 | 57 | 54.1% | Very concentrated |
| 562219 | Other Nonhazardous Waste Treatment and Disposal | 102 | 48 | 50.9% | Very concentrated |
| 524210 | Insurance Agencies and Brokerages | 102 | 27 | 59.2% | Very concentrated |
| 238330 | Flooring Contractors | 102 | 74 | 26.4% | Moderately spread |
| 238190 | Other Foundation, Structure, and Building Exterior Contractors | 101 | 79 | 24.2% | Moderately spread |