This NYT article from June has a little more info on Concord's ownership changes.
For Concord Bicycle, the Imagem acquisition will cap a busy period of deal making. Four years ago, Wood Creek Capital Management, a private equity affiliate of MassMutual, bought the Concord Music Group, a record label that had built a business catering to adult tastes with Paul McCartney, the Stax soul catalog and a joint label with Starbucks. (Concord Bicycle is now owned by Barings Alternative Investments, the successor to Wood Creek; Sound Investors, led by the media executive Stephen Smith; and others.) Then, in 2015, Concord merged with the Bicycle Music Company, a publisher, and the combined company made a series of deals for new kinds of music: Wind-Up Records and Razor & Tie brought hard rock and the popular “Kidz Bop” series; a deal for Musart added Latin music; a deal with the music executive Tom Whalley for his label Loma Vista added alternative acts like St. Vincent; and there was a partnership with Andrew Lloyd Webber’s Really Useful Group.