The biofuel industry has become an important part of the global economy, offering clean energy that benefits both the environment and the consumers. It has grown to become one of the most profitable sectors in the United States, with advances in renewable energy technology allowing large investments into developing and producing new types of fuel sources. This article will analyze the six top US biofuel stocks in 2021 based on market analysis and discuss the trend of investments into this booming industry. The first US biofuel stock to mention is Renewable Energy Group, Inc. (NASDAQ: REGI). This company is a leading biofuel producer that produces a variety of renewable fuels from agricultural feedstocks. They have an extensive supply chain and have plans to expand their market in the near future. Additionally, REGI offers a wide range of products, from diesel fuel to ethanol-based products. REGI is a promising stock to watch as its investments will continue to pay off with new advancements in biofuel technology. The second top-notch US biofuel stock to consider is Future Fuels, Inc. (NASDAQ: FUEL). Based in California, this company is an innovative leader in the renewable fuels industry. With a focus on bioprocess engineering, FUEL produces clean energy sources from biological and non-biological feedstocks. Additionally, FUEL has plans to develop and expand their presence in the renewable energy sector. They are currently focusing on research and development of new technologies in order to better develop their existing biofuel products. Next, consider KiOR, Inc. (NASDAQ: KIOR). This company is an advanced biofuel producer that utilizes their proprietary KIOR-XTM process to convert renewable raw materials into clean energy sources. KIOR is an excellent option for investors due to their focus on advanced technologies and their promising outlook for the biofuel sector. Additionally, their production capabilities are unmatched, and they are experiencing rapid growth in terms of revenue and market share. Fourthly, VeraSun Energy Corporation (NYSE: VSE) is another US biofuel stock to consider. This firm specializes in the refining and production of ethanol fuel and related products. Additionally, VSE has been increasing their presence in the renewable energy market through investments in research and development. With a strong focus on the development of renewable energy sources, VSE is a solid stock to consider for potential investors. Fifth on our list is Amyris, Inc. (NASDAQ: AMRS). This firm is a leader in renewable technology, offering advanced solutions for sustainable energy sources. Amyris has recently shifted their focus to developing synthetic biology products, providing solutions for a variety of industries. Additionally, their production capabilities are unmatched, allowing them to quickly enter into renewable energy markets across the globe. Finally, Sinopec USA, Inc. (NYSE: SIN) is a US biofuel stock that should not be overlooked. Sinopec is a Chinese company that is rapidly growing in the United States. They are a leading producer of diesel fuel, jet fuel, and other types of petroleum products. Through their extensive network of distributors, Sinopec is becoming increasingly involved in the US renewable energy sector. With their current share price and market momentum, this could be a great opportunity for investors. In conclusion, these six US biofuel stocks are all viable investments for potential investors. With the growth of the global biofuel industry and advancements in technology, these stocks offer great potential for those interested in renewable energy investments. Keep these stocks in mind when building your portfolio and make sure to properly research each before investing.