The Lagunitas Brewing Company, founded in 1993 in Petaluma, California, is a subsidiary of Heineken International.

"[7][8] The Chicago brewery started producing beer on April 18, 2014, and opened an on-premises taproom a few months later.

[13] However, since Heineken's stake was greater than 25%, Lagunitas no longer met the Brewers Association definition of "craft brewery".

[b] On Saint Patrick's Day in 2005, the California Department of Alcoholic Beverage Control raided a weekly tasting party at the brewery to investigate alleged cannabis dealing by employees.

Lagunitas was found in violation of Section 24200 of California's Business and Professions Code, better known as its "disorderly house" law.

Lagunitas was eventually served a twenty-day suspension of operations and the ordeal was commemorated with a beer named Undercover Investigation Shut-down Ale.