Bill Ackman has tweeted.
Ackman's Pershing Square launched an activist campaign at Chipotle last year and secured new board seats in December. The fast-casual chain has struggled to overcome a series of food safety episodes that hit sales. The fund had 10 percent of Chipotle's shares as of the end of March, according to FactSet.
We're told he ordered a bowl with lettuce, double chicken, chorizo, vegetables, guacamole and rice.
The tweet got 107 retweets, 289 likes and and 90 comments in the first couple of hours. But it was a tweet from Jeffrey Gundlach of DoubleLine Capital Tuesday evening that was perhaps Ackman's biggest troll.
"Should CMG expand menu to get customers back?Raw Egg Breakfast Burrito, anyone? Oh well, bulls have that 0% dividend going for them, anyway!"
Shares of Chipotle are down more than 9 percent this year. On Tuesday they fell as much as 7.6 percent after more reports of illnesses this month at one of its locations in Virginia. The shares were little changed at midday Wednesday despite Ackman's photo.
Ackman joined Twitter under the handle @BillAckman1 at the end of last month and his office has confirmed that is actually him.
— With reporting by CNBC's Leslie Picker.