IQE

IQE disclosed in its 2023 annual report that its single largest customer accounts for more than 30% of revenue, with public records and supply-chain analysis identifying that customer as Apple, whose Face ID and iPhone power-amplifier modules rely on IQE-supplied VCSEL and gallium arsenide wafers. Qualcomm and Wolfspeed are also significant buyers, alongside European defense contractors for gallium nitride radar components. The concentration risk is structural and acknowledged; the firm mitigates it by broadening the GaN power-electronics and AI photonics customer base.

IQE does not make finished chips — it grows the atomically precise crystalline layers on blank wafers using molecular beam epitaxy (MBE) and metal-organic chemical vapor deposition (MOCVD) reactors. This epi-growth step is the hardest physics challenge in compound semiconductor production and represents the performance gate for gallium nitride and indium phosphide devices. An integrated manufacturer can substitute its own epi capability, but most chip-design houses are fabless and rely on IQE as the lone independent pure-play foundry at scale, per the firm's own market-position disclosures.

IQE's gallium nitride epi-wafers are used in power-management chips that improve energy efficiency in AI server racks, while its indium phosphide wafers enable the high-speed optical transceivers linking GPUs across data centers. In September 2024, CEO Americo Lemos restructured the photonics division to accelerate GaN and InP capacity specifically targeting these AI-driven demand pools. The firm is not an AI chip designer, but it supplies the materials that let those chips talk and not overheat.

IQE operates three US epitaxy sites — in Greensboro, North Carolina; Taunton, Massachusetts; and Bethlehem, Pennsylvania — plus a technology center in Santa Clara, California. The Greensboro facility was expanded in 2023 with backing from the US CHIPS Act, which is designed to onshore critical semiconductor supply-chain steps. This US footprint is geopolitically significant: it gives Western defense and telecom buyers a non-Asian source of gallium nitride wafers as tariff and export-control tensions with China escalate.

IQE has long-term supply agreements with the UK MoD to provide gallium nitride epi-wafers for active electronically scanned array (AESA) radar systems. These contracts are disclosed in the firm's annual reports and are subject to UK export-control and supply-security conditions that require certain materials be manufactured at UK sites. The relationship is a moat in defense photonics but also imposes operational boundaries on technology transfer to non-allied countries, which the firm must navigate in its Asian joint ventures.

IQE manufactures the epi-wafer to a proprietary recipe co-developed with the customer; the intellectual property for the device design typically belongs to the customer, but the epitaxial process recipe is IQE's trade secret. The firm is paid on a per-wafer basis with qualification contracts that lock in supply for a given device generation — typically 18 to 24 months for a smartphone cycle. That gives IQE recurring, generationally-locked revenue even though the device IP sits with Apple or Qualcomm.

Americo Lemos joined IQE as CEO in January 2022 after a career spanning Qualcomm, Intel, and GLOBALFOUNDRIES, where he was responsible for the Asia-Pacific foundry business. His appointment signaled a pivot from the founder-era emphasis on pure materials science toward a commercial, customer-partnership model aimed at embedding IQE more deeply in the supply chains of American chip designers. The most visible strategic shift under Lemos has been the GaN-first restructuring announced in 2024 and an increased willingness to co-locate manufacturing capacity near customers in the US.