Here's a nifty piece of research from MapLight, a nonpartisan research organization based in Berkeley, Calif.
Drawing from the personal financial statements filed by the 113rd Congress, MapLight has assembled a spreadsheet that lists the politicians' individual investments in nearly 2,000 public companies. It's searchable by name and company.
Below: The Apple holdings of 48 senators, representatives and their family members.
Click to enlarge.
Note: Lawmakers are not required to disclose the exact value of the assets they hold, but rather a minimum and maximum value for each asset.