John Wayne Gacy aka the "Killer Clown" and "Pogo the Clown" was a Des Plaines, Illinois serial killer convicted of 33 murders executed by the state of Illinois via lethal injection on May 10, 1994. 

8 1/2" x 11" shareholders certificate number 1 for 100 shares of PDM Contractors.
This is the only signed one we've seen and is a pre arrest signature from Pogo!

Issued February 20, 1976 and hand signed, John W. Gacy.

John Wayne Gacy 1976 PDM Contractors 100 Shares Signed