Heron Lake BioEnergy, LLC owns and operates an ethanol plant near Heron Lake, Minnesota, with a permitted capacity of approximately 72.3 million gallons per year of undenatured ethanol on a twelve-month rolling sum basis; produces and sells co-products including distillers grains with solubles primarily marketed to dairy and beef industries, crude corn oil used as biodiesel feedstock and animal feed supplement, and corn syrup as a feed additive; operates through Ethanol Production and Natural Gas Pipeline segments, with its wholly owned subsidiary HLBE Pipeline Company, LLC owning Agrinatural Gas, LLC, which manages a natural gas pipeline supplying the ethanol facility and other customers via connection to Northern Border Pipeline Company facilities in Cottonwood County, Minnesota. The company, founded in 2001 and headquartered at 91246 390th Ave, Heron Lake, Minnesota 56137, distributes products through third-party marketers primarily in the United States, targeting fuel blenders, livestock feeders, and biodiesel producers. Granite Falls Energy, LLC completed its acquisition of the remaining 49.3% stake in Heron Lake BioEnergy for $14 million in September 2021, making it a wholly owned subsidiary and integrating operations across two Minnesota ethanol plants with combined capacity exceeding 120 million gallons per year; in November 2024, the U.S. EPA approved an Efficient Producer Petition Process determination confirming nearly 30% greenhouse gas reduction for its corn-starch ethanol pathway. In October 2025, the company paid $18,445 in fines to the Minnesota Pollution Control Agency for air permit violations at its Jackson County facility.