Sinclair owns the largest ABC subchannel affiliate by market size, WABM-DT2/WDBB-DT2 in the Birmingham market, which serve as repeaters of WBMA-LD (the largest low-power "Big Four" affiliate by market size, which itself is also simulcast on a subchannel of former WBMA satellite WGWW, owned by Sinclair partner company Howard Stirk Holdings).
What is the biggest ABC subchannel affiliate by the size of markets?
WABM-DT2/WDBB-DT2 in the Birmingham market