McDonald's Has Savory September

"Our Plan to Win is powering sustainable momentum in our business with every area of the world once again posting strong comparable sales growth," said McDonald's in a press release. "We are increasing relevance, enhancing menu variety and improving customer convenience."

Ackman, who last year emerged as a major agitator at McDonald's, has plans to buy $2 billion worth of the company's shares, and he has sent a letter to shareholders in an attempt to garner support for a proxy fight, according to a recent report from Bloomberg News.

Ackman couldn't be immediately reached to comment on McDonald's results or his plans for the company.

Shares of McDonald's recently were up 80 cents, or 2%, to $42.05 in premarket trading.