S4S Ventures

Olyzon raises $10M for CTV platform

Olyzon has closed a $10 million Series A round led by S4S Ventures, with returning investors including Eurazeo. The company positions itself as an agent-based decision layer for Connected TV (CTV) advertising, using AI agents to evaluate inventory, build cross-platform media plans, push decisions into existing DSPs/SSPs and publisher ad servers, and consolidate measurement signals into composite KPIs. Olyzon said it will use the funding to further develop its platform, expand internationally—scaling US activities and opening a London office—and will announce additional product and partner updates at Cannes Lions in June. Named executives quoted include Jules Minvielle (Co-Founder & CEO of Olyzon), Sir Martin Sorrell and Sanja Partalo (leaders of S4S Ventures). Reported clients include Publicis, WPP, OMD, Mastercard, Loewe, Audi, McDonald’s and DoorDash.

S4S Ventures Leads $10M Series A for Olyzon

Olyzon, a two-year-old French ad tech firm that positions itself as an agentic decisioning layer for Connected TV (CTV) advertising, closed a $10 million Series A round led by S4S Ventures. The investment vehicle was co-founded by Sir Martin Sorrell and Sanja Partalo; existing backers from a prior $5 million round, including private equity firm Eurazeo, also participated. Olyzon’s platform uses AI agents to map inventory across DSPs, SSPs, publishers and measurement vendors, adapt creative, push decisions to buyers’ execution systems, and consolidate measurement for in-flight and future optimisation. Clients named include Pepsico, Danone, McDonald’s, Nissan, Mastercard and L’Oreal. Olyzon said the funding will be used to expand U.S. operations, open a London office, and drive further product development. (Publication date: 2026-05-28.)

Sir Martin Backs Olyzon with $10M for CTV Platform

Olyzon, a TV ad decisioning company, announced a $10 million Series A led by S4S Ventures, the early-stage investor co-founded by Sir Martin Sorrell and Sanja Partalo. Olyzon offers agentic decisioning technology today as a managed service and plans to build a centralized platform for planning, activation and measurement. Co‑Founder and CEO Jules Minvielle said the funding will support U.S. expansion, marketing, deeper supply integrations, partnerships and improved feedback loops to continuously retrain its agents. The article also highlights industry debate over vendor neutrality — Cadent’s Doug Rozen argued that neutrality is now “table stakes” and that transparency matters more than conflict. The roundup includes separate items on OpenAI’s ChatGPT ad upgrades and several other industry updates.