The firms have held Atlantic, the country’s 14th largest cable operator, since 2004.
Credit Suisse Group is handling the sale according to Bloomberg, which said a set of first-round bids had already been placed last week.
Oak Hill has been relatively quiet since its portfolio company Dave & Buster’s filed for $150m IPO last July.
The mid-market firm manages more than $8bn of committed capital and has been involved in over 60 transactions since the mid-1980s.
Abry focuses on buyouts of media, communications, business and information services companies in the US.
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