Look for "hidden champion" companies with a market share exceeding 50% in niche segments.

```reference [{"type":"table-json","data":{"application/vnd.aime.table.v2+json":{"columns":[{"index_name":"Company","key":"Company","type":"STR"},{"index_name":"Niche Segment","key":"Niche Segment","type":"STR"},{"index_name":"Estimated Global Market Share","key":"Estimated Global Market Share","type":"STR"},{"index_name":"SourceID","key":"SourceID","type":"STR"}],"datas":[{"Company":"Herrenknecht AG","Niche Segment":"Tunnel Boring Machines","Estimated Global Market Share":"~70%","SourceID":"21"},{"Company":"Blum GmbH","Niche Segment":"Concealed Cabinet Hinges","Estimated Global Market Share":">50%","SourceID":"47"},{"Company":"Sensata Technologies","Niche Segment":"Automotive Sensors & Controls","Estimated Global Market Share":">50%","SourceID":"3"},{"Company":"Kohler Co.","Niche Segment":"Premium Faucets","Estimated Global Market Share":">50%","SourceID":"3"}]}}}] ``` These companies illustrate how “hidden champions” quietly dominate highly-specific markets worldwide: • Herrenknecht AG leads tunnel-boring machines with roughly 70 % global share . • Austria’s Blum GmbH supplies more than half of the world’s concealed cabinet-hinges . • Sensata Technologies controls a majority share of niche automotive sensor and control products . • Kohler Co. commands well over 50 % of the premium faucet segment, especially among professional plumbers . To generate this overview, I extracted each firm’s name, niche, and estimated global share from the referenced articles and collated them into a single table for easy comparison.