Vertex Energy Inc (NASDAQ:VTNR) is one of the largest processors of used motor oil in the U.S., and over the past five years has produced marked returns for investors.

Vertex Energy is an environmental services company that recycles industrial waste streams and off-specification commercial chemical products. The company provides a range of services designed to aggregate, process and recycle industrial and commercial waste systems in the Gulf Coast and Central Midwest regions of the U.S.

Among a number of services, Vertex Energy collects and purchases used motor oil directly from third-party generators, aggregates used motor oil from a network of local and regional collectors and sells used motor oil to customers for use as a feedstock or replacement fuel for industrial burners.

Vertex Energy was founded in 2001 and is headquartered in Houston, Texas.

Here's how the returns break down from August 2017 to the present: 

And finally, Vertex Energy is up from $0.98 to $13.46 for a return of 1,273.47%.