Sekisui Aerospace

Sekisui Aerospace

Originally founded as AIM Aerospace, the company was acquired in 2019 by Japan's Sekisui Chemical and rebranded to Sekisui Aerospace, integrating its US operations into a global advanced-materials division headquartered in Renton, Washington. The firm operates three production facilities — two in Washington state and one in Orange City, Iowa — serving as a Tier 1 supplier of thermoset and thermoplastic composite parts. The manufacturing footprint supports production of ducts, thrust reversers, interior panels, and primary structural components for commercial and defense platforms. Confirmed program exposure includes the Boeing 737 MAX and 787 Dreamliner families, along with the CH-53K heavy-lift helicopter and other military rotorcraft. The Sumner, Washington site focuses on large-bonded assemblies and metal-bonding processes, while the Orange City plant specializes in high-rate production of smaller composite parts using compression molding and automated fiber placement. Sekisui Aerospace operates as a wholly owned subsidiary within Sekisui Chemical's High-Performance Plastics Company, an entity with roughly $10 billion in group-wide annual revenue, though the aerospace division's contribution is not broken out separately. The parent's 2019 acquisition placed the firm alongside Sumika Electronic Materials and other Sekisui US holdings, with the stated aim of expanding from automotive and electronics composites into the civil and defense aerospace supply chain. The Iowa plant was expanded in 2021 to add a new cleanroom for next-generation thermoplastic welding processes. Its structural differentiator is vertical integration into a Japanese materials conglomerate — Sekisui Aerospace draws on internal polymer science and prepreg development from the parent company's R&D labs, rather than buying all raw materials from external suppliers. That positions it less as an independent manufacturer and more as an application arm for Sekisui Chemical's broader push into transportation composites, giving it a feedstock and balance-sheet advantage over standalone aerospace suppliers.