📰 What This Document Is 📄

This is an 8-K filing, which is a mandatory SEC report used when a company needs to announce a major, unscheduled event to investors. Essentially, it’s a heads-up notice that something significant has changed since the company’s last official report. The main news here is the retirement of the Chief Financial Officer (CFO), David Day, and the resulting transition plan.

👉 Why it matters: Changes in top leadership, especially in the finance department, signal major organizational shifts. Investors pay close attention to the transition plan to ensure that the company's financial stability and future operations won't be disrupted.

🏢 What Magnite Does 🚀

Magnite is described as the world's largest independent sell-side advertising platform. In simple terms, the company acts as a massive marketplace that connects advertisers (brands/agencies) with publishers (websites, apps, media outlets) so that digital ads can be shown.

👉 Magnite helps publishers monetize their content across all digital screens and formats, including CTV (Connected TV), online video, display, and audio. 👉 The platform allows leading agencies and brands to access brand-safe, high-quality advertising space, facilitating billions of advertising transactions every month. 👉 The company maintains a huge global footprint, with offices located in New York City, Los Angeles, Denver, London, Singapore, and Sydney, operating across North America, EMEA, LATAM, and APAC.

🕊️ CFO Transition & Search 🤵

The central announcement is the retirement of David Day, the CFO. The board and company have established a phased transition plan to ensure stability. David Day is expected to serve as CFO through September 30, 2026, and then transition into a special advisory role until May 31, 2027.

👉 The Succession Plan: The Board of Directors has launched a comprehensive search for a new CFO, which will consider both external industry experts and internal candidates. Mr. Day will actively participate in helping to find his successor, guaranteeing continuity. 👉 David Day has a long history with Magnite, having been involved since its predecessor, Rubicon Project, launched its IPO. His tenure was crucial during the 2020 mergers, including the integration of Telaria and the acquisition of SpotX and SpringServe.

📣 Leadership Commentary 🗣️

Executives utilized this announcement to provide reassurance and highlight the strength of the company’s foundation, emphasizing stability despite the change in leadership.

• Michael Barrett (CEO): He praised David Day, calling him "an invaluable partner and a steady hand." He noted that David’s "financial stewardship has been essential in building the global leader we are today."
• Paul Caine (Chairman of the Board): He lauded Day's "strategic vision," stating that it was "instrumental in evolving our financial foundation to meet the demands of our dynamic industry."
• David Day (Retiring CFO): He expressed confidence in the company's future, stating, "I am immensely proud of the company we have built, our world class finance team, and the Company’s robust financial position, which leaves me more confident than ever in Magnite’s long-term success."

💰 Financial Guidance & Outlook 📊

Despite the change in leadership, Magnite wants to assure investors that its short-term financial outlook remains unchanged. The company explicitly reaffirmed its expectations for Q1 and the full year 2026.

👉 Stability Signal: This guidance was originally disclosed in the company’s Q4 2025 earnings release on February 25, 2026. The reaffirmation signals management's confidence that the pending leadership transition will not negatively impact their near-term financial performance.

🧠 David Day’s Professional Background 📚

David Day has a deep background in technology and finance, which is highlighted by the company. Before working at Magnite, he held executive roles at several major technology companies, including Overture Services, Yahoo! Search Marketing, Spot Runner, and ReachLocal. He began his career in public accounting with major firms like Arthur Andersen and PricewaterhouseCoopers.

🗓️ Key Personnel Contacts 📞

If you are seeking more information or have questions regarding the company, Magnite provided specific contacts:

• Investor Contact: Nick Kormeluk (949.500.0003, [email protected])
• General Contact: Charlstie Veith (516.300.3569, [email protected])

🧠 The Analogy

Think of Magnite as a massive, global ship carrying out huge advertising transactions. The CFO, David Day, was like the Chief Engineer who has kept the ship's core mechanical systems running smoothly and financially sound for years. His planned retirement means a new engineer is coming in, but the captain (CEO) and the Board are stepping in to guarantee that the ship continues its journey smoothly, ensuring the vital journey to the next port (2026 goals) remains uninterrupted.

🧩 Final Takeaway

While the departure of a long-standing CFO like David Day is a major change, Magnite is proactively managing the transition and reaffirming its full-year 2026 financial expectations. The key message is one of continuity: the business strategy and financial outlook remain strong despite the personnel change.