WILSONVILLE, OR -- The rancor over Mentor Graphics grows more heated still as its largest shareholder called for the heads of its board of directors.

Read more: Icahn's Ire Goes Higher

WILSONVILLE, OR -- Another top Mentor Graphics shareholder turned up the heat on the EDA software company yesterday, issuing a public letter criticizing the company's management for "unacceptable" decision-making and performance.

Read more: Mentor Shareholder to 'Failing Leaders': 'Time is Up'

WILSONVILLE, OR -- The high stakes poker game over Mentor Graphics gets more interesting by the day.

Read more: Mentor, Icahn Tussle Takes Another Turn

WILSONVILLE, OR -- Carl Icahn is one unhappy Mentor Graphics shareholder. The notorious investor took Mentor's board to task for rejecting his $1.9 billion offer to buy the company and its followup decision today to sell up to $250 million in new bonds, a move, he says, will further dilute the company's stock.

Read more: Icahn Irate Over Mentor's Latest Moves