{"license":"https://creativecommons.org/licenses/by/4.0/","dataset":"atlas","updatedThrough":"2026-08-15","guardrail":"The atlas exposes only relationships declared in the current public data. A link or issue grouping does not make unlike measures comparable, establish ownership or control, define an antitrust market, assign liability, or show that a policy event caused an economic outcome.","filters":{"depth":1,"edgeType":"all","edgeTypeMatched":true,"focus":"industry:21211","focusMatched":true,"kind":"all","kindMatched":true,"layer":"all","layerMatched":true,"query":"","view":"network"},"summary":{"nodeCount":5478,"edgeCount":19193,"sourceCount":45,"profileCount":5433,"nodeKindCount":13,"layerCount":4,"eligibleEdgeCount":19193,"matchedNodeCount":5,"plottedEdgeCount":7,"plottedNodeCount":5,"hiddenNodeCount":0,"directNeighborCount":4},"focusNode":{"id":"industry:21211","kind":"industry","label":"Coal mining","shortLabel":"21211 Coal mining","description":"2022 Economic Census employer-firm concentration screen for NAICS 21211.","href":"/industries/21211","metricLabel":"Revenue HHI","metricValue":"523.1","detail":"218 firms / 27.4B revenue","status":"published","year":2022,"color":"#f59e0b","searchText":"21211 coal mining 21","connectionCount":4},"nodes":[{"id":"industry:21211","kind":"industry","label":"Coal mining","shortLabel":"21211 Coal mining","description":"2022 Economic Census employer-firm concentration screen for NAICS 21211.","href":"/industries/21211","metricLabel":"Revenue HHI","metricValue":"523.1","detail":"218 firms / 27.4B revenue","status":"published","year":2022,"color":"#f59e0b","searchText":"21211 coal mining 21","connectionCount":4,"distance":0,"labelVisible":true,"radius":20,"x":450,"y":260},{"id":"industry:212114","kind":"industry","label":"Surface coal mining","shortLabel":"212114 Surface coal mi...","description":"2022 Economic Census employer-firm concentration screen for NAICS 212114.","href":"/industries/212114","metricLabel":"Revenue HHI","metricValue":"612.2","detail":"163 firms / 10.4B revenue","status":"published","year":2022,"color":"#f59e0b","searchText":"212114 surface coal mining 21","connectionCount":4,"x":450,"y":112,"distance":1,"radius":11,"labelVisible":true},{"id":"industry:212115","kind":"industry","label":"Underground coal mining","shortLabel":"212115 Underground coa...","description":"2022 Economic Census employer-firm concentration screen for NAICS 212115.","href":"/industries/212115","metricLabel":"Revenue HHI","metricValue":"702","detail":"72 firms / 17.1B revenue","status":"published","year":2022,"color":"#f59e0b","searchText":"212115 underground coal mining 21","connectionCount":4,"x":598,"y":260,"distance":1,"radius":11,"labelVisible":true},{"id":"industry:2121","kind":"industry","label":"Coal mining","shortLabel":"2121 Coal mining","description":"2022 Economic Census employer-firm concentration screen for NAICS 2121.","href":"/industries/2121","metricLabel":"Revenue HHI","metricValue":"523.1","detail":"218 firms / 27.4B revenue","status":"published","year":2022,"color":"#f59e0b","searchText":"2121 coal mining 21","connectionCount":3,"x":450,"y":408,"distance":1,"radius":11,"labelVisible":true},{"id":"source:census-ecnsize-concentration-2022","kind":"source","label":"2022 Economic Census Concentration of Largest Firms","shortLabel":"U.S. Census Bureau","description":"Economy-wide national firm concentration statistics by 2022 NAICS industry including revenue-based HHI and largest-firm concentration ratios.","href":"/sources/census-ecnsize-concentration-2022","metricLabel":"Access date","metricValue":"2026-07-17","detail":"U.S. Census Bureau","status":"public dataset","year":2026,"color":"#64748b","searchText":"census-ecnsize-concentration-2022 2022 economic census concentration of largest firms u.s. census bureau economy-wide national firm concentration statistics by 2022 naics industry including revenue-based hhi and largest-firm concentration ratios. u.s. census bureau, 2022 economic census, ec2200sizeconcen: selected sectors - concentration of largest firms for the united states, released april 2025. public_dataset","connectionCount":1872,"x":302,"y":260,"distance":1,"radius":11,"labelVisible":true}],"rows":[{"id":"industry-hierarchy:21211:2121","layer":"measurement","relationshipType":"industry_hierarchy","relationshipLabel":"NAICS parent classification","fromId":"industry:21211","fromKind":"industry","fromLabel":"Coal mining","fromHref":"/industries/21211","toId":"industry:2121","toKind":"industry","toLabel":"Coal mining","toHref":"/industries/2121","evidenceLabel":"2022 NAICS hierarchy","evidenceDetail":"Coal mining (NAICS 21211) is classified under Coal mining (NAICS 2121) in the 2022 NAICS hierarchy.","sourceId":"census-ecnsize-concentration-2022","sourceUrl":"https://www2.census.gov/programs-surveys/economic-census/data/2022/sector00/EC2200SIZECONCEN.zip","confidenceLevel":"high","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A NAICS parent-child link records Census classification ancestry; it does not establish product substitutability, a legal antitrust market, or competitive effects."},{"id":"industry-hierarchy:212114:21211","layer":"measurement","relationshipType":"industry_hierarchy","relationshipLabel":"NAICS parent classification","fromId":"industry:212114","fromKind":"industry","fromLabel":"Surface coal mining","fromHref":"/industries/212114","toId":"industry:21211","toKind":"industry","toLabel":"Coal mining","toHref":"/industries/21211","evidenceLabel":"2022 NAICS hierarchy","evidenceDetail":"Surface coal mining (NAICS 212114) is classified under Coal mining (NAICS 21211) in the 2022 NAICS hierarchy.","sourceId":"census-ecnsize-concentration-2022","sourceUrl":"https://www2.census.gov/programs-surveys/economic-census/data/2022/sector00/EC2200SIZECONCEN.zip","confidenceLevel":"high","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A NAICS parent-child link records Census classification ancestry; it does not establish product substitutability, a legal antitrust market, or competitive effects."},{"id":"industry-hierarchy:212115:21211","layer":"measurement","relationshipType":"industry_hierarchy","relationshipLabel":"NAICS parent classification","fromId":"industry:212115","fromKind":"industry","fromLabel":"Underground coal mining","fromHref":"/industries/212115","toId":"industry:21211","toKind":"industry","toLabel":"Coal mining","toHref":"/industries/21211","evidenceLabel":"2022 NAICS hierarchy","evidenceDetail":"Underground coal mining (NAICS 212115) is classified under Coal mining (NAICS 21211) in the 2022 NAICS hierarchy.","sourceId":"census-ecnsize-concentration-2022","sourceUrl":"https://www2.census.gov/programs-surveys/economic-census/data/2022/sector00/EC2200SIZECONCEN.zip","confidenceLevel":"high","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"A NAICS parent-child link records Census classification ancestry; it does not establish product substitutability, a legal antitrust market, or competitive effects."},{"id":"industry-source:2121:census-ecnsize-concentration-2022","layer":"measurement","relationshipType":"industry_source","relationshipLabel":"Economic Census source","fromId":"industry:2121","fromKind":"industry","fromLabel":"Coal mining","fromHref":"/industries/2121","toId":"source:census-ecnsize-concentration-2022","toKind":"source","toLabel":"2022 Economic Census Concentration of Largest Firms","toHref":"/sources/census-ecnsize-concentration-2022","evidenceLabel":"U.S. Census Bureau","evidenceDetail":"2022 Economic Census Concentration of Largest Firms supplies the 2022 employer-firm concentration screen for NAICS 2121.","sourceId":"census-ecnsize-concentration-2022","sourceUrl":"https://www2.census.gov/programs-surveys/economic-census/data/2022/sector00/EC2200SIZECONCEN.zip","confidenceLevel":"high","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"The Census source supports an industry screening row, not a legal antitrust market finding."},{"id":"industry-source:21211:census-ecnsize-concentration-2022","layer":"measurement","relationshipType":"industry_source","relationshipLabel":"Economic Census source","fromId":"industry:21211","fromKind":"industry","fromLabel":"Coal mining","fromHref":"/industries/21211","toId":"source:census-ecnsize-concentration-2022","toKind":"source","toLabel":"2022 Economic Census Concentration of Largest Firms","toHref":"/sources/census-ecnsize-concentration-2022","evidenceLabel":"U.S. Census Bureau","evidenceDetail":"2022 Economic Census Concentration of Largest Firms supplies the 2022 employer-firm concentration screen for NAICS 21211.","sourceId":"census-ecnsize-concentration-2022","sourceUrl":"https://www2.census.gov/programs-surveys/economic-census/data/2022/sector00/EC2200SIZECONCEN.zip","confidenceLevel":"high","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"The Census source supports an industry screening row, not a legal antitrust market finding."},{"id":"industry-source:212114:census-ecnsize-concentration-2022","layer":"measurement","relationshipType":"industry_source","relationshipLabel":"Economic Census source","fromId":"industry:212114","fromKind":"industry","fromLabel":"Surface coal mining","fromHref":"/industries/212114","toId":"source:census-ecnsize-concentration-2022","toKind":"source","toLabel":"2022 Economic Census Concentration of Largest Firms","toHref":"/sources/census-ecnsize-concentration-2022","evidenceLabel":"U.S. Census Bureau","evidenceDetail":"2022 Economic Census Concentration of Largest Firms supplies the 2022 employer-firm concentration screen for NAICS 212114.","sourceId":"census-ecnsize-concentration-2022","sourceUrl":"https://www2.census.gov/programs-surveys/economic-census/data/2022/sector00/EC2200SIZECONCEN.zip","confidenceLevel":"high","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"The Census source supports an industry screening row, not a legal antitrust market finding."},{"id":"industry-source:212115:census-ecnsize-concentration-2022","layer":"measurement","relationshipType":"industry_source","relationshipLabel":"Economic Census source","fromId":"industry:212115","fromKind":"industry","fromLabel":"Underground coal mining","fromHref":"/industries/212115","toId":"source:census-ecnsize-concentration-2022","toKind":"source","toLabel":"2022 Economic Census Concentration of Largest Firms","toHref":"/sources/census-ecnsize-concentration-2022","evidenceLabel":"U.S. Census Bureau","evidenceDetail":"2022 Economic Census Concentration of Largest Firms supplies the 2022 employer-firm concentration screen for NAICS 212115.","sourceId":"census-ecnsize-concentration-2022","sourceUrl":"https://www2.census.gov/programs-surveys/economic-census/data/2022/sector00/EC2200SIZECONCEN.zip","confidenceLevel":"high","indicatorId":null,"entityCode":null,"observationCount":null,"firstYear":null,"latestYear":null,"preferredView":null,"sourceIds":null,"guardrail":"The Census source supports an industry screening row, not a legal antitrust market finding."}]}