It sounds like the Board is in the middle here.  If they refuse to release the list, the shareholder asking for it might sue; if the list is released, they might get sued by the shareholders on the list.  It's time to ask an attorney for advice, based on all of the facts, including the co-op documents and any privacy policy the Board might have adopted.  If you're going to get sued no matter what, pick the lawsuit you have the best chance of winning.  One place to find a lawyer to deal with this is our website, http://attorneypages.comA co-op shareholder has a right to a certain amount of information about the co-op's finances.  Whether that right goes this far, I don't know.