Digital advertising technology company PubMatic (NASDAQ: PUBM) reported Q3 2026 results beating Wall Street’s revenue expectations, with sales up 17.1% year on year to $79.58 million. Guidance for next quarter’s revenue was better than expected at $92 million at the midpoint, 0.6% above analysts’ estimates. Its non-GAAP profit of $0.25 per share was 78.6% above analysts’ consensus estimates.

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StockStory’s take

PubMatic’s third quarter results were not rewarded by the market, despite exceeding Wall Street’s expectations for both revenue and profitability. Management attributed this performance to robust growth in high-value channels such as connected TV (CTV), mobile app, and new AI-enabled solutions, which together made up nearly two-thirds of total revenue. CEO Rajeev Goel emphasized that “disciplined investments to drive advertiser performance” and the company’s focus on proprietary data intelligence contributed to an acceleration in revenue growth for the third consecutive quarter. The team also highlighted significant expansion in emerging categories, including the rapid adoption of the Activate platform and AgenticOS, alongside notable traction with mid-market demand-side platforms.

Looking ahead, PubMatic’s guidance reflects confidence in continued double-digit revenue growth, driven by expanding adoption of AI-powered products and agentic advertising solutions. Management pointed to new partnerships, such as with OpenAI, and increasing momentum in sell-side decisioning as key factors shaping next quarter’s outlook. CFO Steve Pantelick explained, “We are ramping up hiring, primarily in our buyer-focused sales team, to expand across high-value channels and formats,” while also emphasizing ongoing infrastructure investments to support growth in areas like Activate, AI, and commerce media. The company expects these investments to deliver operating leverage as it broadens its product suite and customer reach.

Key insights from management’s remarks

Management linked the latest quarter’s performance to strong execution in AI-driven advertising, rapid expansion of agentic workflows, and deepening relationships with both publishers and buyers.

• AI and agentic adoption surge: PubMatic’s AgenticOS platform saw rapid uptake, with over 120 fully agentic campaigns run since launch, and all major agency holding companies participating. This adoption is driving efficiencies in campaign planning and execution, with Goodway Group reporting higher reach and cost-effectiveness through agentic workflows.

• High-value channel mix shift: Nearly two-thirds of revenue now comes from CTV, mobile app, and emerging solutions like Activate and commerce media. These high-value channels grew more than 50% year-over-year, reflecting both increased advertiser demand and product innovation.

• Mid-market DSP growth: Activity from mid-market demand-side platforms (DSPs) increased over 40% year-over-year, broadening the company’s customer base and reducing reliance on legacy DSPs. This diversification helps offset softness in certain verticals and legacy relationships.

• Operational efficiency gains: The company improved gross margins by focusing compute resources on higher-value impressions, reducing overall processed impressions while increasing monetized impressions. This led to a 5 percentage point year-over-year improvement in gross margin, supplemented by changes in server infrastructure assumptions.

• Strategic partnerships and new categories: PubMatic expanded into new growth areas with partnerships like OpenAI/ChatGPT for intent-driven ad placements and Sony Pictures for live sports streaming on PS5. These relationships allow access to premium inventory and support the company’s position at the intersection of AI and new digital environments.

Drivers of future performance

PubMatic’s management expects continued growth to be driven by AI-powered innovation, channel diversification, and operational leverage, but notes that evolving privacy regulations and competitive shifts remain important watchpoints.

• AI and agentic solutions expansion: Management believes that expanding adoption of AgenticOS and Activate platforms will further differentiate PubMatic, enabling faster, more efficient media buying for advertisers and deeper direct relationships with publishers. These products are expected to drive higher spend per customer as agentic workflows gain traction across the ecosystem.

• Investments in sales and infrastructure: The company is increasing hiring in its buyer-focused sales organization and investing in GPU-centered infrastructure to support high-value channels and AI capabilities. Management stated that productivity improvements from AI are being reinvested into sales capacity to accelerate growth while maintaining margin discipline.

• Regulatory and market shifts: Leadership acknowledged potential benefits from remedies in the Google Ad Tech case, anticipating that industry changes could lead to new demand on PubMatic’s platform. However, they also flagged ongoing privacy changes (such as Apple’s iOS updates) and increased competition in CTV and mobile app as areas requiring continued adaptation and vigilance.

Catalysts in upcoming quarters

Looking ahead, our analysts will track (1) the scaling of agentic and AI-based buying platforms like AgenticOS and Activate, (2) the success of new partnerships, such as with OpenAI and Sony Pictures, in driving high-value channel growth, and (3) the impact of increased sales capacity and infrastructure investments on overall revenue momentum. Additionally, we will monitor regulatory developments, particularly the Google Ad Tech case, for their potential to shift market dynamics.

PubMatic currently trades at $17.96, down from $19.03 just before the earnings. At this price, is it a buy or sell? The answer lies in our full research report (it’s free).

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