Golden Compound Golden Compound GmbH, established in 2014 and headquartered in Holdorf, Germany, specializes in developing sustainable biocomposites by incorporating sunflower seed hulls into plastics. Its product lines include GC Pro, a durable and recyclable material for technical applications, and GC Green, a bio-based, biodegradable plastic. These technologies aim to conserve fossil resources and reduce CO₂ emissions. Golden Compound