Magnite promotes Brian Gephart to Chief Financial Officer. Gephart brings five years of executive leadership at company to role; succeeds retiring CFO David Day. September 21, 2026 08:30 ET | Source: Magnite, Inc. NEW YORK, Sept. 21, 2026 (GLOBE NEWSWIRE) - Magnite (Nasdaq: MGNI), the world's largest independent sell-side advertising platform, today announced the promotion of Brian Gephart as Chief Financial Officer (CFO), effective October 1, 2026. Gephart will succeed David Day, who previously announced his retirement after a distinguished decade-long tenure leading the company's financial operations. Gephart, who has served as the Company's Chief Accounting Officer since June 2021, will oversee Magnite's global financial strategy and operations, including corporate finance, accounting, reporting, investor relations, treasury, and tax. "For the past five years, Brian has been an integral part of our executive leadership team, working closely with me and our leadership team," said Michael Barrett, CEO of Magnite. "His deep understanding of our business, strategic expertise and capital markets experience make him the natural choice to lead our financial organization as we enter this next chapter. Brian's appointment reflects the strength of the leadership team we've built at Magnite and the depth of talent within our organization. We look forward to having him take on this expanded role as we continue to scale our CTV platform and drive growth across the open internet." Gephart has more than 20 years of experience across public-company finance, accounting, and capital markets. Before joining Magnite, he served as Chief Financial Officer and Principal Financial Officer at Leaf Group, a publicly traded consumer internet company, where he oversaw financial operations, reporting, and strategy. He previously held senior accounting roles in industry and began his career in public accounting, initially in audit and later specializing in capital markets and accounting advisory services. "Magnite has established itself as a leading force in programmatic advertising, particularly in the fast-growing CTV landscape," said Brian Gephart, incoming CFO of Magnite. "I look forward to taking on the CFO role at such an important time for the company and working alongside Michael and the entire executive team to build on the strong foundation David has established. Together, we will maintain financial discipline, execute against our strategic priorities, and create long-term value for our shareholders." "Working alongside Michael, the Board, and our exceptional finance team has been one of the highlights of my career," said David Day, outgoing CFO. "I am extremely confident in Magnite's market position and future growth prospects, and I am proud of the strong foundation we have built together. I look forward to watching the company continue to grow and succeed." About Magnite We're Magnite (NASDAQ: MGNI), the world's largest independent sell-side advertising company. Publishers use our technology to monetize their content across all screens and formats including CTV, online video, display, and audio. The world's leading agencies and brands trust our platform to access brand-safe, high-quality ad inventory and execute billions of advertising transactions each month. Anchored in bustling New York City, sunny Los Angeles, mile high Denver, historic London, colorful Singapore, and down under in Sydney, Magnite has offices across North America, EMEA, LATAM, and APAC. Forward-Looking Statements This press release contains forward-looking statements. Forward-looking statements are based on assumptions and estimates, and are subject to known and unknown risks, uncertainties and other factors that may cause our actual results, performance or achievements to be materially different from expectations or results projected or implied by forward-looking statements, including factors identified under the caption "Risk Factors" in filings we have made and will make from time to time with the Securities and Exchange Commission, or SEC, including our Annual Report on Form 10-K for the year ended December 31, 2025 and subsequent Quarterly Reports on Form 10-Q. Forward-looking statements are not guarantees of future performance or events and investors are cautioned not to place undue reliance on any forward-looking statement. Furthermore, forward-looking statements speak only as of the date on which they are made, and, except as required by law, the company disclaims any obligation to update these forward-looking statements to reflect future events or circumstances.

NativeAds.ai names Annika Geiger EVP of Sales, Europe. Nativeads.ai, a next generation creative tech company using generative AI to power the future of dynamic advertising, announced the appointment of Annika Geiger as Executive Vice President of Sales, Europe. Based in London, Geiger will lead NativeAds.ai's European business and commercial strategy as the company expands adoption of its AI-powered creative technology across programmatic, social, CTV and retail media. Geiger joins NativeAds.ai following leadership roles across Amazon Ads, Magnite and Oracle Advertising, bringing deep experience across retail media, connected TV, programmatic advertising and measurement. Most recently at Amazon Ads, she led key retailer relationships across the UK. Previously, at Magnite, she led CTV initiatives across brand-direct and commerce media, and earlier in her career worked across contextual targeting and media measurement at Oracle Advertising. Her appointment comes as advertisers face growing pressure to produce more creative, for more audiences, across an increasingly fragmented set of channels and retail media environments. While AI has dramatically increased the potential speed and scale of content production, brands still need to ensure that every asset reflects their brand identity, meets channel-specific requirements and is designed around the audiences and moments that drive performance. NativeAds.ai addresses this challenge by enabling brands and agencies to generate personalized creative at scale while embedding a brand's DNA and channel requirements directly into the creative process. For retail media networks, the platform also creates an opportunity to expand access to advertisers that historically lacked the creative resources needed to participate, including small and midsize businesses, while enabling larger brands to rapidly develop retail-ready creative by audience, product, retailer and tentpole moment. "Creative is one of the biggest drivers of advertising performance, yet it remains one of the least scalable parts of the media workflow," said Annika Geiger, EVP of Sales, Europe at NativeAds.ai. "I saw this firsthand at Amazon: brands that showed up with the right creative at the right moment consistently had an advantage. But doing that across audiences, retailers and channels using traditional production models is incredibly difficult. NativeAds.ai is solving that problem by bringing intelligence, brand consistency and scale together, and I'm excited to help brands and retailers across Europe rethink what creative production can look like in the AI era." "Annika joining NativeAds.ai is an important milestone as we expand our business globally," said Al Kallel, CEO and Co-Founder of NativeAds.ai. "She has spent her career at the forefront of advertising innovation across Amazon, Magnite and Oracle and brings the industry expertise, relationships and commercial leadership to help drive our next phase of growth. Having built advertising businesses at Amazon myself, I'm especially excited to have another Amazon Ads leader join us as we reimagine how advertising is created, personalized and optimized for the AI era. With Annika leading our European business from London, we're doubling down on our ambition to make NativeAds.ai a defining creative platform for the next generation of advertising." Geiger's appointment also comes as NativeAds.ai increases its presence across the European advertising and retail media ecosystem. She will speak during the D3con Programmatic Breakfast Lounge alongside DMEXCO, where she will discuss how advertisers can use AI to generate personalized creative at scale while maintaining brand DNA across every asset and producing channel-ready outputs in one click. Geiger will also speak at Retail Reshaped in Hamburg on November 17, focusing on how AI-powered creative can help retailers unlock an underserved SMB advertising market by lowering the creative barrier to entry, while giving large FMCG brands the ability to generate retail-ready creative across audiences, tentpole moments and other variables to improve ROAS and sales performance. "Europe is at an important inflection point across retail media, programmatic and AI," added Geiger. "The media infrastructure has become incredibly sophisticated, but creative production hasn't kept pace. The next opportunity is connecting those two sides of advertising - making it as easy to personalize and adapt the creative as it is to define the audience and activate the media."