The Arena Group Launches Dedicated Marketplace on Index Marketplaces, Expanding Access to Premium, Brand-Safe Advertising Inventory

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Brands and agencies can access curated, brand-safe supply through one of the first publisher-led marketplaces on Index Marketplaces, powered by The Arena Group’s portfolio of premium lifestyle and finance brands NEW YORK, October 27, 2025 --( BUSINESS WIRE )-- The Arena Group Holdings, Inc (NYSE American: AREN) today announced the launch of a dedicated marketplace on Index Marketplaces, powered by Index Exchange – one of the world’s largest independent supply-side platforms – becoming one of the first publishers to activate this offering. This initiative expands access to premium, brand-safe advertising inventory that directly connects advertisers with The Arena Group’s influential brands including Parade, Men’s Journal and TheStreet. The Arena Group’s deep audience engagement and data-driven publishing expertise now connects with Index Exchange’s extensive network of over 3,000 media owners across display, video, mobile app, and streaming TV. The new marketplace offers agencies and brands a powerful way to reach highly engaged audiences in trusted, contextually relevant environments, all without standard minimum investment requirements. "This partnership with Index Exchange enhances how advertisers connect with our premium audiences while maintaining transparency and efficiency," said Megan Hong, Sr. Director, Partner & Yield Management at The Arena Group. "Together, we’re making it easier for brands to access high-quality placements across our lifestyle, finance, and culture verticals, powered by our data insights and leading digital platform." A dedicated Arena Group Marketplace via Index Marketplaces allows marketers to: "Media buyers are increasingly seeking scale and precision in brand-safe environments," said Max Caukin, Senior Director of Marketplaces at Index Exchange. "Through Index Marketplaces, The Arena Group offers marketers direct access to some of the most trusted digital destinations in lifestyle and finance, enabling meaningful consumer connections through premium, contextually-aligned content." Marketers can now activate campaigns across Index Exchange’s inventory through a streamlined workflow, combining audience-specific activation and optimization with The Arena Group’s premium publisher reach. About The Arena Group The Arena Group Holdings, Inc. (NYSE American: AREN) is an innovative technology platform and media company with a proven cutting-edge playbook that transforms media brands. Our unified technology platform empowers creators and publishers with tools to publish and monetize their content, while also leveraging quality journalism of anchor brands like TheStreet, Parade, Men’s Journal and Athlon Sports to build their businesses. The company aggregates content across a diverse portfolio of brands, reaching over 100 million users monthly. Visit us at thearenagroup.net and discover how we are revolutionizing the world of digital media. About Index Exchange Index Exchange is a global advertising supply-side platform enabling media owners to maximize the value of their content on any screen. We’re a proud industry pioneer with over 20 years of experience connecting leading experience makers with the world’s largest brands to ensure a quality experience for consumers. To learn more, visit: www.indexexchange.com or follow us on LinkedIn. View source version on businesswire.com: https://www.businesswire.com/news/home/20251027242212/en/ Contacts Media Contact Morgan Fitzgerald [email protected]

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