In supply chain activities, there is always the potential for risk to arise, therefore risk management is needed for risk control. PT. Marinal Indorima Kapedi is a manufacturing company engaged in fisheries, which processes raw materials of Stolephorus Sp. fish where supply chain activities have the opportunity to pose risks that cause a decrease in product quality. The purpose of this study is to identify quality reduction risks and risk agents that occur in supply chain activities then design mitigation strategies that can be used to reduce the emergence of risk agents. The method used to determine priorities and mitigation strategies is House of Risk (HOR). From the results of the study 7 proposed mitigation strategies were proposed to reduce the possibility of the emergence of risk agents in the company's supply chain activities, namely conducting routine training for all workers, setting a standard time for each process on the production line, implementing production machinery instead. workers, oversee every tighter work activity, coordinate with suppliers, apply a system of violations to contract workers if the working mechanism is not in accordance with the SOP, and take Stolephorus Sp. fish only for trusted suppliers