Applied Optoelectronics, Inc

AOI is a U.S.-registered company, but its manufacturing footprint is distributed across the United States, Taiwan, and China. The company operates three manufacturing sites in Sugar Land, Texas; Taipei, Taiwan; and Ningbo, China, plus an R&D facility in Duluth, Georgia. Manufacturing geography matters because key laser chips are made in the U.S., while substantial assembly and product integration also occur in Taiwan and China, creating exposure to tariffs, trade restrictions, and cross-border supply chain risk. The company disclosed that in 2025 a majority of revenue was manufactured at its China-based subsidiary and a large share at its Taiwan facility, while it expects U.S. and Taiwan manufacturing to become more meaningful over time. This geographic mix also affects tax rates, logistics, and the ability to respond to customer demand in North America and Asia.

AOI faces meaningful customer concentration risk because a small number of hyperscale and CATV customers account for a large share of revenue, making demand forecasting and production planning difficult. The company also operates in a highly competitive optical networking market where larger rivals may have more resources, broader product portfolios, and stronger customer relationships. Tariffs, export controls, and U.S.-China trade tensions are a major risk because AOI manufactures across the U.S., Taiwan, and China and depends on cross-border supply chains for components and assembly. Product qualification cycles are long and demand can shift quickly with technology transitions, so delays in design wins or slower AI adoption could leave the company with underutilized capacity and inventory risk. In addition, the company has significant fixed costs from vertical integration and manufacturing investments, which can pressure margins if volumes or product mix weaken.