PubMatic, a leading Supply-Side Platform (SSP), is positioning itself at the forefront of a significant shift in the digital advertising landscape, identifying the current moment as an "inflection point" for both the company and the broader industry. The company’s strategic pivot is heavily anchored in its commitment to agentic artificial intelligence (AI), a technology PubMatic believes will redefine ad execution in the coming years. This bold vision was articulated during PubMatic’s Fourth Quarter and Full Year 2025 earnings call, where the company reported $80 million in Q4 revenue, a 6% decrease year-over-year, and $282.9 million for the full year, down 3% from the previous year. Despite these figures reflecting negative growth, PubMatic framed the results as positive, having surpassed its own revenue projections, and investors responded with optimism, with the company’s stock price climbing approximately 6% in after-hours trading.
Navigating Revenue Challenges and Strategic Diversification
The reported revenue figures for the full year 2025 were attributed by PubMatic CFO Steve Pantelick to a challenging period characterized by a "downturn followed by a normalization in spend" from a significant, albeit unnamed, incumbent Demand-Side Platform (DSP). While speculation within the industry has heavily pointed towards The Trade Desk as this partner, PubMatic has actively worked to mitigate the impact of such concentrated dependencies. Pantelick elaborated that PubMatic has strategically diversified its DSP ecosystem by onboarding new mid-tier partners. These newer partners, he explained, offer substantial growth potential and are expected to increase their ad spend on the platform.
PubMatic CEO Rajeev Goel expressed confidence in the company’s future trajectory, highlighting the growing adoption of its proprietary agentic AI offering, AgenticOS. Coupled with robust demand in Connected TV (CTV) and mobile advertising, and a noticeable return to growth in the traditional display advertising sector, Goel anticipates PubMatic’s business will experience double-digit growth in the latter half of 2026. This forward-looking outlook underscores PubMatic’s strategic focus on emerging technologies and resilient advertising channels.
The Agentic AI Imperative: A Vision for the Future
PubMatic’s long-term strategy hinges on its deep belief in the transformative power of agentic AI. Goel projected that by 2028, agentic AI will be responsible for executing an estimated 25% of all digital advertising, with this figure projected to surge to 50% by 2030. This ambitious forecast positions agentic AI not as a supplementary tool, but as a fundamental driver of future ad operations.
The company’s proactive efforts to establish itself as an early leader in this domain are multifaceted. The introduction of AgenticOS, PubMatic’s specialized platform for agentic AI execution, and its active participation in the development of the Ad Context Protocol—an initiative aimed at enhancing the understanding of agentic ad demand—are central to this strategy. These initiatives, Goel believes, will yield significant returns as the industry transitions towards AI-driven advertising.
Since launching its inaugural agent-executed CTV campaign in collaboration with the ad agency Butler/Till in January 2026, PubMatic has reportedly facilitated over 250 such campaigns. Goel emphasized that a substantial number of these campaigns involve new advertisers onboarding to PubMatic’s platform, a clear indicator that agentic AI solutions are effectively attracting incremental revenue.
Furthermore, PubMatic has implemented a tiered revenue model for AgenticOS campaigns, generating additional fees beyond its standard SSP take rate. This approach mirrors the revenue generation strategy employed by its Activate direct-to-buyer connection, establishing AgenticOS as a distinct and valuable new revenue stream that complements existing margins.
To accelerate the adoption of its AI technologies, PubMatic launched an AI accelerator program. This initiative has garnered significant interest, with nearly 100 brands, agencies, and streaming platforms already enrolling. Goel described this as "the fastest early-stage adoption of any product we’ve launched," underscoring the market’s receptiveness to PubMatic’s AI-centric offerings.
Evolving DSP Relationships and Strategic Partnerships
Beyond its aggressive push into agentic AI, PubMatic’s earnings call also illuminated the evolving dynamics of its relationships with DSP partners. The company’s full-year 2025 performance was notably impacted by The Trade Desk’s decision in August 2025 to reclassify all SSPs as resellers. This move by The Trade Desk led to an increased prioritization of its OpenPath solution, a direct-to-publisher connection that bypasses SSPs, thereby altering the traditional supply chain dynamics.
Both Goel and Pantelick referenced the impact of an unnamed DSP partner on PubMatic’s Q3 2025 revenue, noting a significant dip before spend from this platform stabilized in August and September. Pantelick provided a more granular analysis, stating that excluding the influence of this particular DSP and accounting for the ebb and flow of 2024 political ad spending, PubMatic’s revenue would have demonstrated an 18% year-over-year increase in Q4 2025 and a 9% increase for the full year 2025. This highlights the underlying strength of PubMatic’s core business when major external disruptions are factored out.
A cornerstone of PubMatic’s growth strategy, occupying the first point on its five-point plan, is the diversification of its DSP partner mix. The company is actively cultivating relationships with mid-tier and specialized platforms, recognizing their potential for increased spend. PubMatic has recently welcomed 50 new DSP partners and has strategically "reshaped the mix of our largest DSPs towards fast-growing commerce and high-value ad verticals like Pharma."
In a notable development signaling the intensifying competition between major players in the ad-tech space, Goel revealed that Amazon DSP has ascended to become one of PubMatic’s top five buyers. This indicates a significant shift in advertising spend and a broader competitive landscape, with Amazon emerging as a key player on PubMatic’s platform.
Supporting the strategy of engaging mid-market partners, Pantelick reported a substantial 30% year-over-year increase in ad spend from mid-market DSPs during Q4 2025. He further characterized the advertisers represented by these DSPs as forming the "fastest-growing segment of the market" throughout 2025, emphasizing the strategic importance of this segment for PubMatic’s future growth.
PubMatic’s Five-Point Growth Plan: A Multifaceted Strategy
PubMatic’s ambitious growth strategy is clearly delineated across five key pillars, each addressing critical areas of the digital advertising ecosystem:
1. Diversified DSP Partnerships: As detailed above, this involves expanding the network of DSP partners, with a particular focus on mid-tier and specialized platforms, and optimizing the mix of its largest DSPs towards high-growth verticals.
2. Activate Direct-to-Buyer Business: The second point on the growth plan is the continued expansion of PubMatic’s Activate offering, a direct connection to buyers. This segment experienced a remarkable tripling of revenue in Q4 2025. Supply-path optimization (SPO), of which Activate is a significant component, accounted for an impressive 55% of all activity on PubMatic’s platform in 2025, underscoring the market’s demand for greater transparency and efficiency in ad sourcing.
3. Growth in CTV, Mobile, and Emerging Revenue Streams: PubMatic is capitalizing on the sustained growth in CTV and mobile advertising. Excluding the impact of 2024 political ad spending, PubMatic’s CTV revenue surged by 50% year-over-year in Q4 2025. Mobile app revenue saw a healthy 25% increase during the same quarter. Emerging revenue streams, which encompass Activate, commerce media, and new AI solutions, demonstrated a remarkable 75% growth in Q4 and now represent nearly 10% of PubMatic’s total revenue. Concurrently, PubMatic’s established display advertising business experienced a 20% uplift in Q4.
4. Emerging AI Solutions: This pillar represents PubMatic’s commitment to developing and offering innovative AI-powered products to publishers. The company is actively working on solutions that leverage AI to enhance publisher operations and monetization.
5. Internal AI Optimizations: The fifth point focuses on the internal application of AI to optimize PubMatic’s own operations. This includes leveraging AI for code generation and process improvements. Notably, 40% of the new code written by PubMatic in the second half of 2025 was AI-generated, showcasing a deep integration of AI within the company’s development lifecycle. Currently, 10% of PubMatic’s publishers are already generating revenue from AI solutions, including AgenticOS and other publisher-facing products. Goel expressed his aspiration for this figure to eventually reach 100%, emphasizing the significant "runway ahead of us" in harnessing the full potential of AI.
The company’s strategic investments in agentic AI, coupled with its focus on diversified partnerships and resilient growth channels, signal a proactive approach to navigating the evolving complexities of the digital advertising industry. PubMatic’s performance, despite recent revenue challenges, suggests a strong underlying business and a clear vision for future growth, driven by technological innovation and strategic adaptation.
