This　paper　investigates　the　cooperative　robust　parallel　operation　problem　where　a　linear　uncertain　plant　is　collectively　driven　by　multiple　actuators　that　cooperate　over　directed　graphs.　In　order　to　address　both　the　uncertain　parameters　of　the　plant　and　the　communication　constraints　imposed　by　the　communication　network,　a　distributed　dynamic　output　feedback　control　law　is　devised　based　on　the　internal　model　principle.　It　is　shown　that　the　proposed　control　law　can　effectively　achieve　robust　output　regulation　of　the　closed-loop　system　while　ensuring　plant　input　sharing　among　the　actuators.　The　effectiveness　of　the　proposed　control　law　is　demonstrated　through　a　practical　example.　©　2025　Elsevier　Ltd