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GPB Capital
What: New York private-equity firm
Holdings: Under contract with majority stakes in 66 dealerships
Where: New York, New Jersey, Connecticut, Texas, California and Pennsylvania
Numbers: $1.2 billion in assets; more than 1,000 investors
M.O.: Requires sellers keep 15-25% stake, stay and run operations

In the past four years, GPB Capital has quietly grown by buying exclusive brand dealerships in small to midsize markets, and larger stores or groups in metro areas.