At its open meeting on July 14, 2010, the SEC voted unanimously to publish a concept release seeking public comment on a variety of issues relating to the mechanics of communications and voting under the SEC’s proxy rules. “Proxy plumbing” has attracted significant attention among companies, investors and other market participants in recent years, particularly as contested shareholder votes have grown more common. The release is organized around three general topics: (1) the accuracy, transparency and efficiency of the proxy voting system; (2) communications with shareholders and shareholder participation in voting; and (3) the relationship between voting power and economic interest. This memorandum summarizes the key questions raised by the release.