Contact Us

Find answers to frequently asked questions below or feel free to contact us:

North America

416 S. Bell Ave
Ames, IA 50010

Toll Free: 1-888-REG-8686
Phone: (515) 239-8000

  • Company Directory: ext. 2
  • Customer Service, Logistics & Procurement: ext. 3
  • Finance & Accounting: ext. 4
  • Operations: ext. 5
  • More Options: ext. 6




Barbara Strozzilaan 350
1083 HN Amsterdam Netherlands
Phone: +31 (0) 20 757 6800

Feedstock Procurement and Sales: [email protected]
Biodiesel and Co-Product Sales: [email protected]

Frequently Asked Questions 

About REG

What does Renewable Energy Group do?

Renewable Energy Group, Inc., (REG) is one of the world’s largest producers of cleaner fuels, including biodiesel and renewable diesel. We also supply numerous fuels, products and services to transportation, home heating, power generation, agricultural, and industrial markets. 

How can I get investor information on REG?

REG is listed on the Nasdaq Stock Market under the ticker symbol REGI. Visit our investor relations page for more information.

I’m a member of the media. Where can I get more information about REG?

Visit our newsroom for our press kit, news release and media contact information.


What is biodiesel?

Biodiesel is an advanced biofuel that is renewable and has been used for decades as a cleaner-burning alternative to petroleum diesel. It is made from renewable resources that would otherwise have no further use, including recycled cooking oil, waste animal fats and vegetable oils.

Biodiesel vs. diesel — what’s the difference?

Biodiesel is made from renewable resources that would otherwise have no further use, including recycled cooking oil, waste animal fats and vegetable oils. Petroleum diesel, on the other hand, is a fossil fuel made from non-renewable sources. Another big difference is that biodiesel produces fewer emissions than petroleum diesel and is better for the environment. 

Does biodiesel work in cold weather?

Yes. Many fleets use biodiesel blends year-round in cold-weather climates. As with all diesel fuels, proper storage and handling coupled with good winter fuel additives help fleets use biodiesel blends in the cold. 

What is renewable diesel?

Renewable diesel meets the same ASTM standard as petroleum diesel, but it is a renewable fuel with much lower emissions and strong performance specifications. 

How is renewable diesel different from biodiesel?

When looking at renewable diesel vs. biodiesel, the similarities are the fuels are made from the same feedstocks and offer lower emissions than petroleum diesel. The differences are that renewable diesel has a different production process and is a distinct fuel from biodiesel with different specifications. In biodiesel production, the feedstock is reacted with methanol to produce fatty acid methyl esters (FAME). With renewable diesel, the feedstock is reacted with hydrogen during what is known as the hydrotreating process. Another difference is renewable diesel has no oxygen, whereas biodiesel does.

What other fuels does REG offer?

REG is a full-service fuel provider with a long list of products including blended fuel, diesel fuel, heating oil and more that you can find on our product pages.


Does REG supply fuel in addition to producing it?

Yes. In addition to having the largest network of biodiesel facilities in the U.S., we also have fuel terminal locations from coast to coast. Our national supply and logistics capabilities allow for on-demand fuel delivery, including a dedicated rail car fleet and fleet partnerships.

How do I purchase fuel from REG?

Getting started is easy. Complete our purchase inquiry form and someone from REG will follow up with you.

How can I become a feedstock supplier to REG?

REG is always looking for reliable feedstock suppliers to provide the biomass needed to make our fuel. Visit our feedstock supplier page to learn more. 

Working at REG

Where is REG located?

REG corporate headquarters is in Ames, Iowa. We also have offices and production facilities in several other locations in the U.S. and Europe

How do I apply for a job at REG?

You can search for and apply for jobs at REG on the employment section of our website here.

Does REG offer internships?

Yes. REG believes strongly in helping students gain experience as they prepare to enter the professional world. Learn more on our internship page.

Get Industry Insights With REG Newsletters

Delivered to your inbox, our electronic newsletters provide information that can help your organization succeed. To ensure you receive information that is relevant to what you do, we have newsletters targeted at fleets, Clean Cities coalitions and heating oil companies.