New Generation Wines and McKinley Vintners are to merge from January 1, 2016, Harpers has learned.
The combined business will target the independent fine wine sector nationally as well as the London on-trade.
NGW's James Booth will be managing director of the new company while Jim Furze from McKinley will become operations director. Peter McKinley will maintain an active role.
Booth said: "This is a hugely positive and exciting step which demonstrates the commitment of both New Generation Wines and McKinley Vintners to the future of their combined customers, suppliers and colleagues."
McKinley said: "I cannot think of a better way to carry on the hard work done by the MVL team than by joining forces with such enthusiastic and energetic business partners."
NGW was set up in 2006 by James Booth, with the backing of the Record family. Sales In the latest financial year to July 31, 2015 hit some £3 million. It has recently been nominated for IWSC Wine Importer of the Year.
McKinley Vintners was founded by Peter and Di McKinley in 1980. Annual turnover is in the region of £2.4 million. Furze joined in early 2013 as managing director after previously working with HwCg and Orion Wines.
Earlier this year, McKinley lost longstanding sales director Guy Nightingale to Louis Latour Agencies, together with key brands Champagne Gosset and Cognac Frapin.
The two companies are currently informing customers and suppliers about their plans. An official announcement will follow in due course.