Tantalus Systems is partnering with Calix to deliver fibre-enabled applications to electric cooperative and municipal utilities across North America. The collaboration pairs Tantalus' TRUSense Fiber Gateway and TRUConnect AMI platform with Calix's Optical Network Terminal technology and AI-native Calix One platform. The partnership targets more than 200 electric cooperatives currently deploying fibre networks. The combined solution enables utilities to deploy advanced metering infrastructure, enhanced broadband, and grid optimisation capabilities, including integration of distributed energy resources. BrightRidge, a public power and broadband utility in Johnson City, Tennessee, is amongst the first customers implementing the joint solution. The companies have completed interoperability testing and are ready for field deployment.

CoastConnect chooses Calix Agent Workforce after investing early in organizational readiness so teams can put AI to Work faster. After leveraging the Calix platform to deliver differentiated experiences across markets - driving 20 percent residential subscriber growth in 18 months - CoastConnect invested in organizational readiness so their teams can activate secure agentic workflows faster and realize value sooner on Calix One Published on 08/19/2026 at 01:31 pm EDT Business Wire Calix, Inc. (NYSE: CALX) today announced that southern Mississippi electric cooperative CoastConnect is investing in Calix Agent Workforce(TM) Cloud to accelerate the delivery of exceptional experiences across residential, business, and community markets. Working closely with award-winning Calix Success(TM), they aligned their data and teams to streamline adoption of secure agentic workflows and see quicker returns on their investment. With this strategic foundation in place, CoastConnect is positioned to leverage AI on the AI-native Calix One(TM) platform to compete and win in any market. CoastConnect has repeatedly turned new growth strategies into measurable business outcomes with Calix. By adopting SmartHome(TM) to deliver differentiated experiences, the cooperative achieved 20 percent residential subscriber growth in 18 months. They also increased CommandIQ(R) mobile app engagement 60 percent with automated provisioning, billing, and subscriber self-service. Beyond residential growth, CoastConnect has strengthened their small business market with SmartBiz(TM)- reaching 20 percent of their first-year goal in weeks - while extending SmartTown(R) public Wi-Fi to 42 locations across 29 communities, enabling secure experiences across every market they serve. Rather than viewing AI as a technology bolt-on, CoastConnect focused on preparing their organization to ramp quickly and realize value from secure agentic workflows from Calix. Working with Calix Success, they optimized workflows on the Calix platform across marketing, support, and operations. By leveraging real-time data and operational insights, streamlining installation processes, and automating manual batch processes, CoastConnect strengthened the foundation needed for rapid AI adoption. Over the past nine months, employees have completed 70 "AI Academy" courses in Calix University - including the Calix AI Leadership Playbook - to learn how to work alongside AI and focus more time on strategic decisions rather than repetitive tasks. Chris Rhodes, president and chief executive officer at CoastConnect, said: "We didn't want to wait for AI to arrive before figuring out how to put it to work across our business. That's why we invested the time with Calix Success long before deployment - ensuring our teams and operations were ready to turn AI into real outcomes. With Calix One and Agent Workforce Cloud, we can accelerate everything we do, from how information flows across teams and what decisions are made to how we deliver the personalized experiences that keep our members choosing CoastConnect." John Durocher, chief operations officer at Calix, said: "To get the highest value from agentic AI, organizations must reimagine the way work gets done. By investing in AI readiness with Calix Success - optimizing workflows, strengthening their data foundation, and upskilling employees - CoastConnect is now set up to deploy agentic workflows with precision for a faster path to ROI. We are proud to support CoastConnect as they leverage Calix One to accelerate growth through experiences and compete and win in their markets." Learn how the AI-native Calix One platform and Calix Success enable service providers to turn organizational readiness for AI into measurable business outcomes. About Calix Calix, Inc. (NYSE: CALX) is an AI platform company that enables service providers to transform their operations and accelerate delivery of differentiated experiences - so they can compete and win in the markets and communities they serve. Through the AI-native Calix One platform, service providers can securely and privately activate agentic-AI alongside their human teams to acquire new subscribers, grow existing subscriber revenue, and build loyalty across residential, business, municipal, and MDU markets. More than 1,200 customers of all sizes leverage the Calix One platform, which has evolved over 15 years at an investment of more than $2 billion. Calix innovation cycles are underpinned by a strong financial balance sheet and a people-first culture that routinely earns broad industry recognition - winning 81 culture and innovation awards since 2025 alone, as well as Fortune's 100 Best Companies to Work For(R) in 2026. This press release contains forward-looking statements that are based upon management's current expectations and are inherently uncertain. Forward-looking statements are based upon information available to us as of the date of this release, and we assume no obligation to revise or update any such forward-looking statement to reflect any event or circumstance after the date of this release, except as required by law. Actual results and the timing of events could differ materially from current expectations based on risks and uncertainties affecting Calix's business. The reader is cautioned not to rely on the forward-looking statements contained in this press release. Additional information on potential factors that could affect Calix's results and other risks and uncertainties are detailed in its quarterly reports on Form 10-Q and Annual Report on Form 10-K filed with the SEC and available at www.sec.gov. Calix and the Calix logo are trademarks or registered trademarks of Calix and/or its affiliates in the U.S. and other countries. A listing of Calix's trademarks can be found at https://www.calix.com/legal/trademarks.html. Third-party trademarks mentioned are the property of their respective owners. View source version on businesswire.com: https://www.businesswire.com/news/home/20260819116262/en/ (C) Business Wire - 2026

Calix extends platform leadership beyond broadband, enabling secure grid monitoring for critical utility infrastructure. Advancing and facilitating trusted partnerships with 100+ electric cooperatives and utility providers, Calix introduces secure grid monitoring capabilities - supported by the newly launched GigaPro ONT - to improve the reliability and resiliency of communications infrastructure while protecting critical assets SAN JOSE, Calif. - August 13, 2026 - Calix, Inc. (NYSE: CALX) today announced a grid monitoring solution on the AI-native Calix One(TM) platform. Extending platform capabilities to utility providers, the solution combines the newly launched GigaPro(R) GPR1011XH optical network terminal (ONT), AXOS(R)-powered E-Series access appliances, and network operations tools on a standards-based passive optical network (PON) architecture. Building on insights from utility industry leaders Conexonopens in a new tab and Irby Utilitiesopens in a new tab, Calix is expanding trusted partnerships with more than 100 electric cooperatives, municipalities, and utility providers through grid monitoring capabilities that enable secure, cost-effective management of critical grid assets over resilient, intelligent communications infrastructure. As utilities invest billionsopens in a new tab to modernize the electric grid, mission-critical grid operations increasingly depend on highly resilient, reliable communications networks as much as power infrastructure. Electric cooperatives, which own and maintain nearly 42 percent of U.S. electric distribution linesopens in a new tab, are at the center of this transformation. Drawing on decades of experience helping electric cooperatives operate and scale their broadband networks, Calix has enabled exceptional business outcomes, including reducing OSS/BSS integration from 18 months to just 10 weeks, turning up subscribers 83 percent faster, reducing mean time to repair 75 percent, and lowering operating costs up to 50 percent. Providers can now expand their Calix partnerships and better serve their utility markets with a solution that delivers: * A purpose-built ONT appliance for utility environments. The compact, hardened GigaPro GPR1011XH fits into existing field cabinets for indoor and outdoor deployments, enabling utility providers to deploy reliable, low-latency fiber communications deeper into their network while avoiding costly upgrades. * Secure, modernized utility communications networks. The GigaPro ONT is DC-powered and attaches to XGS-PON to deliver 10GE LAN connectivity, helping utility providers replace fragmented legacy architectures with a scalable, secure fiber-based solution that provides integrated Advanced Encryption Standard (AES) data encryption. * Centralized operations across distributed infrastructure. The Calix One platform will deliver agentic capabilities for utilities to increase visibility of grid assets and communications networks, helping them proactively monitor, manage, and troubleshoot critical infrastructure. * Greater value from existing fiber investments. Ecosystem integrations with partners like Conexon and Irby Utilities extend grid monitoring capabilities over existing fiber infrastructure - reducing deployment complexity and accelerating modernization initiatives. * Flexible deployment options for utility providers. Calix E-series access appliances - powered by AXOS - extend secure, reliable, fiber-based connectivity to substations, remote sites, and other critical infrastructure locations, supporting a scalable foundation for grid modernization. Carl Meyerhoefer, senior vice president of business development at Conexon, said: "We built our fiber network to provide every electric cooperative partner with a fiber foundation for smart grid connectivity - enabling both grid monitoring and broader modernization initiatives. Many early adopters are already putting these capabilities to work. With the new GigaPro ONT appliance, Calix is delivering a purpose-built solution that will help our member cooperatives accelerate deployment and expand the value of smart grid and electric membership cooperative services across their networks." Patrick Reams, vice president of technology and communications at Irby Utilities, said: "Working with utility providers across the country, we see firsthand how rapidly communications requirements are changing as grid modernization initiatives accelerate. Electric cooperatives and utility providers are looking for secure, resilient networks that can support future innovations - including real-time HD video surveillance. By leveraging the Calix One platform, now enhanced with its grid monitoring solution, providers can leverage fiber infrastructure to modernize critical communications, improve operational visibility, simplify operations, and establish a long-term foundation for grid transformation." Shane Eleniak, chief product officer at Calix, said: "The future of the grid depends on the same element that transformed rural communities: trusted communications infrastructure. Drawing on our longstanding partnerships with fiber providers, many of which stretch back decades, we are excited to extend the Calix One platform to connect grid monitoring appliances to utility network operations centers. As communications and energy converge, providers now have a single, intelligent, and secure platform that helps them operate critical infrastructure, automate work with AI, and deliver differentiated experiences that strengthen the communities they serve." Learn how Calix is enabling utility providers to modernize grid communications with secure, scalable fiber infrastructure. About Calix Calix, Inc. (NYSE: CALX) is an AI platform company that enables service providers to transform their operations and accelerate delivery of differentiated experiences - so they can compete and win in the markets and communities they serve. Through the AI-native Calix One platform, service providers can securely and privately activate agentic AI alongside their human teams to acquire new subscribers, grow existing subscriber revenue, and build loyalty across residential, business, municipal, and MDU markets. More than 1,200 customers of all sizes leverage the Calix One platform, which has evolved over 15 years at an investment of more than $2 billion. Calix innovation cycles are underpinned by a strong financial balance sheet and a people-first culture that routinely earns broad industry recognition - winning 81 culture and innovation awards since 2025 alone, as well as Fortune's 100 Best Companies to Work For(R) in 2026. This press release contains forward-looking statements that are based upon management's current expectations and are inherently uncertain. Forward-looking statements are based upon information available to Calix as of the date of this release, and Calix assume no obligation to revise or update any such forward-looking statement to reflect any event or circumstance after the date of this release, except as required by law. Actual results and the timing of events could differ materially from current expectations based on risks and uncertainties affecting Calix's business. The reader is cautioned not to rely on the forward-looking statements contained in this press release. Additional information on potential factors that could affect Calix's results and other risks and uncertainties are detailed in its quarterly reports on Form 10-Q and Annual Report on Form 10-K filed with the SEC and available at www.sec.gov. Calix and the Calix logo are trademarks or registered trademarks of Calix and/or its affiliates in the U.S. and other countries. A listing of Calix's trademarks can be found at https://www.calix.com/legal/trademarks.html. Third-party trademarks mentioned are the property of their respective owners.