STR Holdings, Inc. operates as a global provider specializing in solar panel encapsulation solutions and industrial materials research and development. The company designs, develops, and manufactures high-performance encapsulants that protect embedded semiconductor circuits in solar panels, suitable for both crystalline silicon and thin-film solar modules. Its product portfolio includes ethylene-vinyl acetate (EVA)-based solar encapsulants, multi-layer films for packaging applications such as meat, fish, cheese, yogurt, fruit, cereals, and snack foods. STR Holdings also offers inspection, testing, and audit services, although these relate to former quality assurance businesses divested in the past. The company operates primarily in the United States, Spain, India, and China and has a heritage dating back to 1944 with headquarters in Enfield, Connecticut. STR Holdings is a subsidiary of Zhen Fa New Energy (U.S.) Co., Ltd.
In recent years, STR Holdings completed the sale of its U.S.-based solar encapsulant business to H.B. Fuller Company in January 2021, and subsequently entered a wind-down phase, with a formal plan of complete liquidation and dissolution approved in September 2023. The company filed a Certificate of Dissolution effective October 2023 and has been actively engaged in preserving shareholder value during this process. Operational changes include significant reductions in executive and director compensation and closure of foreign administrative entities, retaining all assets in the U.S. STR Holdings continues limited legal actions concerning outstanding payments from previous transactions and maintains ongoing defense in legal proceedings related to prior asset sales. The company currently has minimal operational activity as it proceeds with the dissolution process.