A group of Northwest Airlines shareholders late Monday asked a bankruptcy judge to deny the carrier’s request for an extension to exclusively file its reorganization plan. Eagan-based Northwest’s exclusivity period is set to run out on Friday. It has asked the judge for an extension until June 29, which is about the time Northwest has said it expects to exit Chapter 11 protection. The shareholders, mostly hedge funds, said Northwest’s plan fails to explore how much the airline might be worth if another carrier bought it. A hearing on the group’s motion was set for Thursday. On Tuesday, Northwest lashed back at the hedge funds for claiming that the airline has “parked” a merger until after it emerges from bankruptcy protection. In a court filing, the airline also wrote that it has “no present plans or intentions to engage in a strategic transaction post-confirmation.”