What Photronics, Inc. told the SEC could break it.

Photronics' photomask revenue is concentrated in a few large semiconductor/FPD customers: in FY2025 Customer A and Customer B individually represented approximately 16% and 13% of consolidated revenue (Customer C ~8%), and its five largest customers together accounted for ~50% of revenue (50%/51% in 2024/2023). One of its largest customers is a related party — an executive officer is related to an individual in a position of authority there — and Photronics recorded $137.3 million of revenue from that customer in 2025. The customers are anonymized (A/B/C) in the filing, so this is captured as a concentration risk rather than edges; a significant decline at any one would materially hurt results. A high customer concentration.

“For fiscal year 2025, Customer A, B and C accounted for approximately 16%, 13% and 8%, of consolidated revenue, respectively.”

Photronics operates eleven manufacturing facilities, with six concentrated in geopolitically and seismically sensitive East Asia — Taiwan (3), China (2) and South Korea (1) — versus the United States (3) and Europe (2); Taiwan is its single largest manufacturing base. It flags that its Taiwan facilities are located in a seismically active area, that its China operations (including the PDMCX Xiamen JV) expose it to substantial risks including weak IP protection under Chinese law, and that escalating U.S./China/Taiwan/Korea political-military tensions and resulting sanctions could disrupt supply chains or even lead to confiscation/destruction of facilities. A real East-Asia manufacturing concentration with earthquake and cross-strait/decoupling exposure for a critical semiconductor-supply node.

“We have eleven manufacturing facilities, which are located in Taiwan (3), China (2), South Korea (1), the United States (3), and Europe (2).”

Photronics depends on a limited number of suppliers for both critical raw materials and manufacturing equipment. It uses high-precision quartz photomask blanks, pellicles and electronic-grade chemicals, for which there are a limited number of suppliers and it does not hold long-term contracts — delays or quality problems with significant raw materials, particularly photomask blanks, could halt photomask shipments. It likewise relies on a limited number of photomask equipment manufacturers (for e-beam/laser lithography, imaging and inspection tools) that require lead times of twelve months or longer. These concentrated, contract-light input and equipment dependencies are genuine supply-continuity risks for a key node in the semiconductor lithography supply chain.

“There are a limited number of suppliers of these raw materials, and we do not have long-term contracts with these suppliers.”