Bolt Threads is a biotechnology company that produces sustainable materials using proteins found in nature. The company was founded in 2009 by Dan Widmaier, David Breslauer, and Ethan Mirsky. Bolt Threads has developed a technology platform that mimics the way spiders produce silk, allowing the company to create high-performance materials that are both sustainable and scalable. Bolt Threads has partnered with several major brands, including Stella McCartney, Adidas, and Best Made Co., to create products made from its materials. The company has raised over $400 million in funding from investors such as Foundation Capital, Formation 8, and Baillie Gifford.