Hamburg, July 23, 2026 — PubMatic (NASDAQ: PUBM) has appointed César Masumbuku as Senior Director, Advertising Solutions for Central Europe. Based in Hamburg, he will lead the company’s commercial strategy across the region, including the expansion of PubMatic’s agentic advertising capabilities for brands, agencies and publishers, reporting to Matt Salmon, VP Advertiser Solutions, EMEA, effective 1st July 2026.
The appointment underscores PubMatic’s continued commitment to investing in top talent and reinforcing its partnerships with brands, holding companies and agencies in the region.
César joins PubMatic from Index Exchange, where he spent five years as Sales Director DACH & CEE building and managing strategic relationships with major agency holding groups and premium publishers across Germany and neighbouring markets. He brings deep expertise in curation and data partnerships and was among the first in the region to guide clients from traditional inventory transactions toward consultative curation models, enabling brands to activate their first-party data directly on the supply side, a background well suited to a market where agentic capabilities are increasingly shaping data and curation strategy.
Before joining Index Exchange, he held leadership positions at Powerchord in Hamburg, at Exponea DE, and at Addapptr.
“The Central Europe market is at an inflection point for agentic advertising, and César brings exactly the combination we need: deep agency relationships, real expertise in curation, and the credibility to lead clients through a real shift in how programmatic works. We are delighted to have him on the team.” said Emma Newman, Chief Revenue Officer, EMEA at PubMatic.
“Central European agencies and publishers are asking harder questions about supply chain quality and data activation than ever before. PubMatic’s position, combining direct access to premium supply with genuine AI capability, is exactly the answer to those questions. I look forward to building on that momentum. “ said César Masumbuku, Senior Director, Advertising Solutions for Central Europe, PubMatic.
About PubMatic
PubMatic (NASDAQ: PUBM) is the leading AI-powered ad tech company delivering digital advertising performance. Through an intelligent, unified platform that connects buyers, publishers, data partners, and commerce media networks, PubMatic delivers superior performance with greater transparency, control, and efficiency.
Since 2006, PubMatic has pioneered every major advance in programmatic advertising, from enabling the first OpenRTB transactions to embedding AI-driven optimization and