Antitrust Radar

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U.S. industry concentration atlas

How concentrated each U.S. industry is, from broad sectors down to detailed lines of business, with each industry's sales, value of shipments, or revenue, and employment from the Census Bureau. Census categories are statistical groupings and are not necessarily antitrust markets.

899Detailed industriessix-digit NAICS679Published HHI220 withheld68Top decileHHI >= 1,081$50.3TRevenue represented2022 Census

Sector signal plane

Where sector medians sit in the Census universe

17 sectorscircle = detailed rowsOpen priority list
Sector median HHI and CR4 signal planeSeventeen Census sectors plotted by median detailed-industry HHI and median CR4, with screen, watch, and priority review HHI regions. Circle size represents the number of detailed industries. Each point links to the filtered industry atlas.Median detailed-industry HHIMedian CR4 (%)Mining, quarrying, and oil and gas extraction: median HHI 559.2; median CR4 43.7% across 21 detailed industries.21Utilities: median HHI 615.9; median CR4 41.6% across 14 detailed industries.22Construction: median HHI 19.4; median CR4 6.4% across 31 detailed industries.Manufacturing: median HHI 439.3; median CR4 38.5% across 346 detailed industries.Wholesale trade: median HHI 360.8; median CR4 29.9% across 69 detailed industries.Retail trade: median HHI 133.9; median CR4 32.8% across 57 detailed industries.Transportation and warehousing: median HHI 277.4; median CR4 40% across 54 detailed industries.Information: median HHI 638.2; median CR4 45.6% across 29 detailed industries.51Finance and insurance: median HHI 405.8; median CR4 31% across 29 detailed industries.Real estate and rental and leasing: median HHI 116.9; median CR4 29.4% across 24 detailed industries.Professional, scientific, and technical services: median HHI 94.9; median CR4 17.8% across 48 detailed industries.Administrative and support and waste management and remediation services: median HHI 182; median CR4 23.5% across 44 detailed industries.Educational services: median HHI 75.6; median CR4 15% across 14 detailed industries.Health care and social assistance: median HHI 35.8; median CR4 8.4% across 39 detailed industries.Arts, entertainment, and recreation: median HHI 192.2; median CR4 21.2% across 25 detailed industries.Accommodation and food services: median HHI 15; median CR4 8% across 15 detailed industries.Other services (except public administration): median HHI 54.3; median CR4 12.8% across 40 detailed industries.
Below 100100-299300-499500+
Priority review / NAICS 51Information
Median HHI638.2Median CR445.6%Sector rank1 / 17Top-decile industries4 / 29

13.8% of detailed industries in this sector fall in the national HHI top decile.

Open sector evidence

NAICS hierarchy navigator

Move through the official industry classification

Select any branch to carry its detailed-industry scope into the concentration plane, economy map, and evidence directory below.

Current branchProfessional, scientific, and technical servicesSector / level 2 of 6
Detailed descendants48Six-digit records in scope
Published HHI81.3%39 published / 9 withheld
Revenue$2.7TExact Census hierarchy row

Direct subsector records

Professional, scientific, and technical services / bars normalized to the largest visible revenue value

Selected classification

NAICS 54

Professional, scientific, and technical services

Sector with 48 detailed descendants.

Median HHI
94.9
Revenue
$2.7T
Employment
11.2M
Employer firms
880.5K

Curated antitrust layer

Research coverage gap

Profile AtlasDataTrace 2017-2022

NAICS hierarchy is an economic classification, not a legal product or geographic market definition.

Economy concentration plane

See scale and concentration together

Revenue uses a logarithmic axis, circle area follows employer-firm count, and color identifies the two-digit NAICS sector.

Current scopeProfessional, scientific, and technical services48 detailed rows
Published HHI3981.3% of scope
Median HHI94.9Median CR4 17.8%
Revenue represented$2.7T9 HHI disclosure-withheld

Detailed-industry cross-section

39 published industries plotted by revenue, HHI, employer-firm count, and NAICS sector.

9 withheld
NAICS 541110: Offices of lawyers; HHI 11.4; $356B revenue; 156,777 employer firmsNAICS 541611: Administrative management and general management consulting services; HHI 118.4; $219.1B revenue; 101,761 employer firmsNAICS 541511: Custom computer programming services; HHI 54.7; $278.5B revenue; 63,144 employer firmsNAICS 541613: Marketing consulting services; HHI 24.1; $77.5B revenue; 50,507 employer firmsNAICS 541219: Other accounting services; HHI 16; $30.3B revenue; 47,767 employer firmsNAICS 541330: Engineering services; HHI 34.6; $304.3B revenue; 47,367 employer firmsNAICS 541512: Computer systems design services; HHI 189.6; $243.3B revenue; 46,074 employer firmsNAICS 541310: Architectural services; HHI 18; $48.6B revenue; 21,258 employer firmsNAICS 541990: All other professional, scientific, and technical services; HHI 77.5; $28B revenue; 17,530 employer firmsNAICS 541410: Interior design services; HHI 4.7; $19.7B revenue; 16,649 employer firmsNAICS 541430: Graphic design services; HHI 4.9; $9.8B revenue; 16,233 employer firmsNAICS 541519: Other computer related services; HHI 186.6; $55B revenue; 11,570 employer firmsNAICS 541715: Research and development in the physical, engineering, and life sciences (except nanotechnology and biotechnology); HHI 117.2; $195.7B revenue; 10,504 employer firmsNAICS 541614: Process, physical distribution, and logistics consulting services; HHI 30; $26B revenue; 8,668 employer firmsNAICS 541620: Environmental consulting services; HHI 62.6; $21.4B revenue; 8,498 employer firmsNAICS 541820: Public relations agencies; HHI 73.7; $15.8B revenue; 8,125 employer firmsNAICS 541612: Human resources consulting services; HHI 281.3; $24.6B revenue; 7,694 employer firmsNAICS 541350: Building inspection services; HHI 33.1; $4.5B revenue; 7,459 employer firmsNAICS 541370: Surveying and mapping (except geophysical) services; HHI 26.5; $11B revenue; 7,225 employer firmsNAICS 541890: Other services related to advertising; HHI 94.9; $22.1B revenue; 7,067 employer firmsNAICS 541380: Testing laboratories and services; HHI 103; $27.9B revenue; 5,690 employer firmsNAICS 541513: Computer facilities management services; HHI 80.3; $23.8B revenue; 5,338 employer firmsNAICS 541922: Commercial photography; HHI 19.4; $2.6B revenue; 5,313 employer firmsNAICS 541320: Landscape architectural services; HHI 25; $6.6B revenue; 4,969 employer firmsNAICS 541214: Payroll services; HHI 311; $26.6B revenue; 4,902 employer firmsNAICS 541199: All other legal services; HHI 152.5; $6B revenue; 4,860 employer firmsNAICS 541714: Research and development in biotechnology (except nanobiotechnology); HHI 90.9; $91B revenue; 4,593 employer firmsNAICS 541910: Marketing research and public opinion polling; HHI 189.2; $25.2B revenue; 3,649 employer firmsNAICS 541340: Drafting services; HHI 84.4; $2.2B revenue; 3,153 employer firmsNAICS 541490: Other specialized design services; HHI 160.9; $3.3B revenue; 2,910 employer firmsNAICS 541930: Translation and interpretation services; HHI 395.4; $6.9B revenue; 2,728 employer firmsNAICS 541720: Research and development in the social sciences and humanities; HHI 390.2; $9.3B revenue; 1,782 employer firmsNAICS 541860: Direct mail advertising; HHI 106; $8.6B revenue; 1,694 employer firmsNAICS 541420: Industrial design services; HHI 187.4; $4B revenue; 1,680 employer firmsNAICS 541713: Research and development in nanotechnology; HHI 551.3; $44.5B revenue; 1,605 employer firmsNAICS 541360: Geophysical surveying and mapping services; HHI 213.9; $1.5B revenue; 769 employer firmsNAICS 541870: Advertising material distribution services; HHI 311.3; $2.4B revenue; 754 employer firmsNAICS 541830: Media buying agencies; HHI 441.6; $9B revenue; 632 employer firmsNAICS 541211: Offices of certified public accountants; HHI 601.6; $144.7B revenue; 49,807 employer firms

Selected record

Offices of certified public accountants

NAICS 541211
HHI
601.6
Revenue
$144.7B
CR4
47.7%
Employer firms
49,807
Open industry profile

High-HHI tail

Highest measured rows

01Offices of certified public accountantsNAICS 541211 / $144.7B601.602Research and development in nanotechnologyNAICS 541713 / $44.5B551.303Media buying agenciesNAICS 541830 / $9B441.604Translation and interpretation servicesNAICS 541930 / $6.9B395.405Research and development in the social sciences and humanitiesNAICS 541720 / $9.3B390.206Advertising material distribution servicesNAICS 541870 / $2.4B311.3

Circle position and rank use Census-published HHI only. Disclosure-withheld values remain in the directory and are excluded from measured comparisons.

Economy composition map

See where economic scale and concentration meet

Each tile is one six-digit NAICS industry. Area follows the selected economic measure; color carries either published HHI or sector identity.

Size tiles by
Color tiles by
Current scopeProfessional, scientific, and technical services48 detailed rows
Area / Revenue$2.7TSales, shipments, or revenue
Color / HHI bands39 published9 HHI disclosure-withheld
Scope median HHI94.9Unweighted across published rows

Area = revenue / Color = hhi bands

1 sector groups / 48 positive-value industries

2022 Economic Census
0-499500-9991,000-1,4991,500-2,4992,500+Withheld

Active industry

Offices of lawyersNAICS 541110

Revenue

$356B

13.35% of current scope / 13.3% of sector

HHI
11.4
CR4
4%
Employment
1,281,880
Employer firms
156,777
Open evidence profile

Largest by revenue

01Offices of lawyers541110$356B02Engineering services541330$304.3B03Custom computer programming services541511$278.5B04Computer systems design services541512$243.3B

Tile area represents revenue within this detailed-industry scope. HHI is a national NAICS screen, not a legal antitrust market. Disclosure-withheld values remain mapped and use the gray band.

Census industry directory

Compare the full NAICS hierarchy

HHI and concentration ratios are based on national sales, value of shipments, or revenue for employer firms.

48 of 1,866
NAICS 541211Offices of certified public accountantsDetailed industry
HHI601.6CR447.7%Revenue$144.7B
NAICS 541713Research and development in nanotechnologyDetailed industry
HHI551.3CR438.6%Revenue$44.5B
NAICS 541830Media buying agenciesDetailed industry
HHI441.6CR434.5%Revenue$9B
NAICS 541930Translation and interpretation servicesDetailed industry
HHI395.4CR435.1%Revenue$6.9B
NAICS 541720Research and development in the social sciences and humanitiesDetailed industry
HHI390.2CR430%Revenue$9.3B
NAICS 541870Advertising material distribution servicesDetailed industry
HHI311.3CR427%Revenue$2.4B
NAICS 541214Payroll servicesDetailed industry
HHI311CR430.5%Revenue$26.6B
NAICS 541612Human resources consulting servicesDetailed industry
HHI281.3CR431.2%Revenue$24.6B
NAICS 541360Geophysical surveying and mapping servicesDetailed industry
HHI213.9CR420.8%Revenue$1.5B
NAICS 541512Computer systems design servicesDetailed industry
HHI189.6CR421.1%Revenue$243.3B
NAICS 541910Marketing research and public opinion pollingDetailed industry
HHI189.2CR421.5%Revenue$25.2B
NAICS 541420Industrial design servicesDetailed industry
HHI187.4CR420.9%Revenue$4B
NAICS 541519Other computer related servicesDetailed industry
HHI186.6CR423.2%Revenue$55B
NAICS 541490Other specialized design servicesDetailed industry
HHI160.9CR421.2%Revenue$3.3B
NAICS 541199All other legal servicesDetailed industry
HHI152.5CR420.2%Revenue$6B
NAICS 541611Administrative management and general management consulting servicesDetailed industry
HHI118.4CR417.8%Revenue$219.1B
NAICS 541715Research and development in the physical, engineering, and life sciences (except nanotechnology and biotechnology)Detailed industry
HHI117.2CR417.7%Revenue$195.7B
NAICS 541860Direct mail advertisingDetailed industry
HHI106CR414.8%Revenue$8.6B
NAICS 541380Testing laboratories and servicesDetailed industry
HHI103CR415.3%Revenue$27.9B
NAICS 541890Other services related to advertisingDetailed industry
HHI94.9CR416.2%Revenue$22.1B
NAICS 541714Research and development in biotechnology (except nanobiotechnology)Detailed industry
HHI90.9CR412.9%Revenue$91B
NAICS 541340Drafting servicesDetailed industry
HHI84.4CR415%Revenue$2.2B
NAICS 541513Computer facilities management servicesDetailed industry
HHI80.3CR413.8%Revenue$23.8B
NAICS 541990All other professional, scientific, and technical servicesDetailed industry
HHI77.5CR414.2%Revenue$28B
NAICS 541820Public relations agenciesDetailed industry
HHI73.7CR414.4%Revenue$15.8B

A NAICS industry is a statistical classification, not a legally defined antitrust market. Use these national revenue concentration measures to screen where deeper product and geographic market analysis may be warranted, not to infer market power or liability.

U.S. Industry Concentration Atlas | Antitrust Radar