Calix, Inc

Calix reports that its revenue is heavily concentrated in the United States, which represented 93% of revenue in 2025 and 92% in 2024. International revenue accounted for the remaining 7% in 2025 and 8% in 2024, with management noting that the increase in international revenue was mainly due to higher shipments to Europe. The company says its near-term focus remains the U.S. and Canada because of its direct sales and marketing presence and government stimulus supporting underserved broadband buildouts. International expansion is expected to become more important as Calix rolls out its third-generation platform, but that also increases exposure to trade barriers, customer adoption differences, and cross-border execution risk.

Calix faces execution risk if customers do not adopt its platform, cloud, and managed services at the pace needed to support growth, because the business depends on converting broadband operators into recurring software and service users. The company is also exposed to supply-chain and vendor dependence risk because its appliance business relies on third-party components and outsourced manufacturing, which can pressure gross margin when shortages or redesigns occur. Management specifically highlighted AI technology risk, cybersecurity risk, tariffs and trade barriers, and international expansion risk, all of which can affect demand, product performance, or operating costs. Because a large share of revenue comes from the U.S., changes in broadband stimulus, customer spending, or competitive dynamics in North America can have an outsized impact. Quarterly results can also swing with product mix, shipment timing, and inventory or purchase-commitment adjustments, making performance less predictable.