Pixar shares climbed last night as speculation grew that Sony plans to make a bid for Apple CEO Steve Jobs' animation company.

Shareholders continue to benefit from attempts to woo Pixar by a variety of groups following that company's decision to stop working with Disney.

CBS MarketWatch reports rumours from the trading floor that say Sony plans to bid $75 per share. Pixar closed last night at $68.11.

"Our comment on all rumours is that we don't comment on rumours," Sony spokeswoman Ann Morfogen told CBS MarketWatch. Pixar officials did not return phone calls.

Analysts do not expect Pixar to succumb to Sony's bid, particularly as Apple/Pixar CEO Steve Jobs controls 60 per cent of the animation company's shares.