Motorola ( MOT ) isn't exactly embracing the shareholder activist movement. The Schaumburg, Ill., tech titan told shareholders to block any attempt by Carl Icahn to gain a seat on the company's board of directors. Motorola says it has received a notice from Icahn Partners Master Fund LP and High River Limited Partnership for the nomination of "Mr. Icahn to Motorola's board of directors at the annual meeting," according to the company's proxy statement filed Friday. "The board urges you to not sign any proxy cards sent to you by the Icahn affiliates," the proxy reads. "Mr. Icahn's nomination has NOT been endorsed by your board of directors." Icahn already owns a 1.3% stake in Motorola and his affiliates have filed plans to acquire more than $1 billion worth of additional stock. The hard-charger would likely want to direct some of the company's $11.2 billion cash toward shareholders through big stock buybacks.