Jack in the Box shares pop after $134 million Jana stake

• Jack in the Box stock popped over 3 percent after a filing from Jana Partners on Tuesday.
• The firm bought 1.3 million shares in the restaurant chain, according to the filing.
• Jana's stake was worth $134 million as of the end of September.

Jack in the Box stock popped over 3 percent after a filing from Jana Partners on Tuesday revealed the firm bought 1.3 million shares in the quick-service restaurant chain.

Jana's stake in Jack in the Box was worth $134 million as of the end of September, according to the SEC filing.

The firm is an activist hedge fund that earlier this year took a big stake in Whole Foods and pushed it to consider a sale. after Whole Foods agreed to be acquired by Amazon.com.