Optimum Communications : 2024 Sustainability & Impact Report (about usOptimum 2024 Sustainability and Impact Report 03DEC25)

About this update from Optimum Communications, Inc.

‌Sustainability & Impact Report 2024 10 19 Table of Contents 03 32 A Letter from Our Chairman and CEO 04 Our Company Environmental Sustainability and Operations Employee Experience 25 Connecting Communities Responsible Business 2024 35 SASB Index OUR COMPANY SUSTAINABILITY AND OPERATIONS EMPLOYEE EXPERIENCE CONNECTING COMMUNITIES RESPONSIBLE BUSINESS SASB INDEX A Letter from Our Chairman and CEO At Optimum, we are committed to delivering more than connectivity. This commitment lives in our mission: to create maximum positive impact for our customers, teammates, communities, and shareholders by delighting with the best customer experience, inspiring our people to be the best, connecting with the best networks, and growing with the best customer relationships. And it comes to life through our vision: to be the connectivity provider of choice, empowering communities and people through lasting, meaningful connections. We call this The Optimum Impact. It is the company we are building, defined by performance, culture, and impact. Transformation is not a phase for us, it is a mindset, and every step we take is about creating long-term value for people and for the planet. This past year, we made that progress real. We strengthened our network for speed, reliability, and resilience. Optimum Fiber was ranked number one for internet speed and reliability in New York and New Jersey by Ookla, and PCMag named us the fastest internet provider in the Mid-Atlantic region. We simplified the customer experience and launched new digital and AI tools that make it easier to do business with us. And we doubled down on our people and culture, earning Great Place to Work® certification for the second year in a row. We also built sustainability into how we operate. In 2024, we reduced total greenhouse gas emissions by 18 percent year over year, while investing in smart energy management, circular waste practices, and network resilience. These are business decisions that strengthen Optimum and support a healthier future for the communities we serve. The Optimum Impact is also about how we show up. We foster an inclusive workplace where every teammate is supported to grow, equipped with training and technology, and protected by a firm commitment to safety, whether in a call center or out in the field. We want every person here to feel proud of the work they do and the difference they make. In our communities, we are bridging the digital divide and expanding access to opportunity. We have extended our small business grant program to help local entrepreneurs compete and thrive. We partner with schools and nonprofits to support STEM learning for the next generation of innovators. When our communities thrive, we all thrive. We are proud of the ground we have covered, and we know there is more to do. As we look ahead, we will keep transforming how we work, how we serve, and how we lead. We will stay focused on delivering The Optimum Impact and keep raising the bar for what a connectivity company can do and who it can be. With purpose, DENNIS MATHEW Chairman and CEO, Optimum OUR COMPANY SUSTAINABILITY AND OPERATIONS EMPLOYEE EXPERIENCE CONNECTING COMMUNITIES RESPONSIBLE BUSINESS SASB INDEX Our Company Optimum (NYSE: OPTU) is one of the largest broadband communications and video services providers in the United States, delivering broadband, video, mobile, proprietary content, and advertising services to approximately 4.5 million residential and business customers across 21 states. Our ongoing broadband and fiber-to-the-home expansion supports the most data-intensive activities and helps us become the connectivity provider of choice in every community we serve. We operate Optimum Media, an advanced advertising and data business, which provides audience-based, multiscreen advertising solutions to local, regional, and national businesses and advertising clients. We also operate News 12, which is focused on delivering best-in-class hyperlocal news content. The way people interact, connect, and communicate evolves every day through faster, more accessible, and more secure products and services. Whether at home or on the go, our brands make it easy for consumers, businesses, schools, hospitals, first responders and communities to reach the people, news, and information they value most. OUR COMPANY SUSTAINABILITY AND OPERATIONS EMPLOYEE EXPERIENCE CONNECTING COMMUNITIES RESPONSIBLE BUSINESS SASB INDEX Business Overview 1 LISTING OPTU (NYSE) HEADQUARTERS Long Island City, NY CHAIRMAN & CEO Dennis Mathew 2024 REVENUE US $8.95 billion EMPLOYEES 10,900 OPTIMUM BROADBAND CUSTOMERS 2 4,346,000 OPTIMUM MOBILE LINES 459,600 OPTIMUM VIDEO CUSTOMERS 2 1,888,200 As of December 31, 2024 Reflects residential and SMB customers

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