Public dataset
2022 Economic Census Concentration of Largest Firms
U.S. Census Bureau
- Rows
- 897
- Years
- 2022
- Accessed
- Jul 17, 2026
Canonical indicator / industry-cr4
Detailed industry CR4
Four-firm share of industry value for six-digit 2022 NAICS industries.
Census industriesPercentCalendar or release year2022
Snapshot median
30.6%Middle of 897 bounded observations- Observations
- 897
- 897 bounded entities
- Coverage
- 2022
- 1 observed period
- Sources
- 1
- U.S. Census Bureau
- Exact pair
- r 0.945
- 679 entity-period matches
Indicator dossierIndustry CR4897 observations / 2022
01 / Measurement contract
Definition before comparison
The unit, universe, period, and source boundary travel with every observation.
What this series measures
Four-firm share of industry value for six-digit 2022 NAICS industries.
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.
- Indicator ID
- industry-cr4
- Unit
- Percent
- Observation dimension
- NAICS industry
- Grouping field
- NAICS sector
- Period basis
- Calendar or release year
- Ranking contract
- Use the latest available row for each entity
02 / Observed variation
Entity distribution and ranked anchors
2022; absent and withheld values do not enter the distribution.
- Minimum
- 0.4%
- 25th percentile
- 16.8%
- Median
- 30.6%
- 75th percentile
- 48.0%
- Maximum
- 99.4%
Selected interval20.2% to 30.1%176 observations / 19.6% of the snapshot
Ranked reference rowsPercent
- 01Iron ore mining212210 / 202299.4%
- 02Guided missile and space vehicle propulsion unit and propulsion unit parts manufacturing336415 / 202298.4%
- 03Home centers444110 / 202298.0%
- 04Deep sea passenger transportation483112 / 202297.7%
- 05Guided missile and space vehicle manufacturing336414 / 202296.7%
- 06Wireless telecommunications carriers (except satellite)517112 / 202296.6%
- 07Commuter rail systems485112 / 202296.4%
- 08Warehouse clubs and supercenters455211 / 202295.6%
- 896Offices of chiropractors621310 / 20221.3%
- 897Nail salons812113 / 20220.4%
03 / Coverage and quality
Where the series has evidence
Observed rows are counted explicitly by period, group, verification status, and confidence level.
Period ledger1 observed period
2022897 entities8971 source
Evidence stateAll indicator observations
Data status
100.0%Verified / 897Confidence
100.0%High / 897NAICS sectorLatest bounded snapshot, largest groups first
| Group | Rows | Average | Range |
|---|---|---|---|
| 31 | 346 | 41.7% | 2.0% to 98.4% |
| 42 | 69 | 31.3% | 8.3% to 58.8% |
| 44 | 57 | 37.4% | 4.6% to 98.0% |
| 48 | 54 | 40.9% | 1.8% to 97.7% |
| 54 | 48 | 19.9% | 2.7% to 56.6% |
| 56 | 44 | 29.9% | 3.4% to 89.9% |
| 81 | 39 | 19.1% | 0.4% to 86.8% |
| 62 | 39 | 16.6% | 1.3% to 88.8% |
| 23 | 31 | 9.6% | 1.9% to 41.4% |
| 51 | 29 | 49.9% | 21.9% to 96.6% |
| 52 | 29 | 41.5% | 11.2% to 95.1% |
| 71 | 25 | 25.8% | 2.2% to 84.7% |
| 53 | 23 | 34.5% | 7.1% to 89.6% |
| 21 | 21 | 46.0% | 13.5% to 99.4% |
Showing 14 of 17 groups. The exact packet retains every observation and group label.
04 / Exact paired lens
Detailed industry HHI and CR4
Published HHI and four-firm share for the same six-digit 2022 NAICS industry.
Same entity + same period0.945Pearson correlation across 679 exact pairs
-1 inverse 0 +1 aligned
- Pairing rule
- Same six-digit NAICS industry and Economic Census year
- Companion indicator
- Industry HHI
- Matched current-series rows
- 679 / 897 (75.7%)
- Unpaired current-series rows
- 218; excluded from correlation
Interpretation boundaryA 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. The relationship is descriptive and does not make a statistical industry equivalent to a legal antitrust market.
05 / Source custody
Evidence behind the series
1 source family, 0 contextual references, and 1 encoded methodology note.
Reusable indicator packetExact rows, stable identifier, and explicit route contract
- Canonical URL
- /indicators/industry-cr4
- Indicator filter
- indicator=industry-cr4
- License
- Antitrust Radar compilation: CC BY 4.0; upstream terms remain in force
Method notes encoded on rowsNo inferred methodology is substituted
- 01
Published 2022 Economic Census share of industry value held by the four largest firms in a six-digit NAICS statistical industry.
Indicator evidence guardrail
One measure, one contract
This profile documents one bounded indicator at a time. Its ranks, distributions, histories, and paired views remain inside the stated universe, period basis, source, unit, and methodology; they are descriptive research screens, not legal findings or components of a composite score.
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.