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PubMatic, a leading Supply-Side Platform (SSP), has declared that both the company and the broader digital advertising industry are at a critical inflection point, with the SSP strategically positioning its future growth on the adoption of agentic artificial intelligence. This bold assertion comes as PubMatic reported its fourth-quarter and full-year 2025 earnings, revealing a mixed financial picture that nonetheless spurred investor confidence.
In its Q4 2025 earnings call on Thursday, February 26th, 2026, PubMatic announced revenue of $80 million, marking a 6% decrease year-over-year. For the full fiscal year 2025, the company’s revenue stood at $282.9 million, a 3% decline compared to 2024. Despite these negative growth figures, PubMatic framed the results positively, highlighting that they exceeded internal revenue projections. The market responded favorably, with PubMatic’s stock price surging approximately 6% in after-hours trading, signaling investor optimism in the company’s long-term strategy.
The revenue dip, according to PubMatic CFO Steve Pantelick, was largely attributed to a temporary downturn followed by a normalization of spend from a significant, unnamed incumbent Demand-Side Platform (DSP). While industry speculation strongly suggests this partner to be The Trade Desk, PubMatic emphasized its proactive measures to mitigate such dependencies. The company has been actively diversifying its DSP relationships, onboarding new mid-tier partners that offer substantial growth potential for increased ad spend.
PubMatic CEO Rajeev Goel expressed confidence in the company’s trajectory, attributing the positive outlook to the growing adoption of PubMatic’s proprietary AgenticOS platform. Coupled with robust demand in Connected TV (CTV) and mobile advertising, and a resurgence in display advertising spend, Goel anticipates PubMatic’s business to achieve double-digit growth in the latter half of 2026.
The Agentic AI Imperative
PubMatic’s strategic pivot towards agentic AI is not merely a tactical adjustment but a foundational bet on the future of digital advertising. CEO Rajeev Goel projects that by 2028, agentic AI will be responsible for executing 25% of all digital advertising transactions, a figure he expects to climb to 50% by 2030. This ambitious forecast underscores PubMatic’s commitment to establishing itself as an early leader in this transformative technology.
The company’s proactive approach is evident in the launch of AgenticOS and its participation in the development of the Ad Context Protocol, an initiative aimed at enhancing the understanding and execution of agentic ad demand. Since announcing its first agent-executed CTV campaign in collaboration with the agency Butler/Till in January 2026, PubMatic has successfully executed over 250 agentic ad campaigns.
Goel noted that a significant portion of these agentic campaigns involved new advertisers joining PubMatic’s platform, demonstrating the technology’s ability to attract incremental revenue. Furthermore, PubMatic benefits from additional fees generated by AgenticOS campaigns, distinct from its standard SSP take rate. This model, similar to the revenue generated by its Activate direct-to-buyer connection, establishes AgenticOS as a new and lucrative revenue stream for the company, independent of its existing profit margins.
To accelerate partner adoption of its agentic AI solutions, PubMatic launched an AI accelerator program. The program has already garnered significant interest, with nearly 100 brands, agencies, and streaming platforms signing up. Goel described this as "the fastest early-stage adoption of any product we’ve launched," underscoring the market’s readiness for such innovative solutions.
Navigating the Evolving DSP Landscape
Beyond the agentic AI narrative, PubMatic’s earnings call also highlighted a significant evolution in its relationships with DSP partners. The full-year 2025 revenue was notably impacted by The Trade Desk’s decision in August 2025 to reclassify all SSPs as resellers. This move prompted The Trade Desk to increasingly favor its OpenPath direct-to-publisher connections, effectively bypassing SSPs in the supply chain and consequently reducing spend channeled through platforms like PubMatic.
Both Goel and Pantelick alluded to an unnamed major DSP’s spending fluctuations throughout 2025, which significantly impacted PubMatic’s Q3 revenue before stabilizing in August and September. Pantelick provided a more granular perspective, stating that excluding the impact of this specific DSP and 2024 political ad spend, PubMatic’s revenue would have shown a robust 18% year-over-year increase in Q4 2025 and a 9% increase for the full year.
In response to this dynamic, PubMatic’s primary growth strategy involves diversifying its DSP partner ecosystem. The company is actively courting mid-market and specialist DSPs, which are seen as having greater potential for growth. PubMatic has expanded its DSP partnerships by adding approximately 50 new platforms and has strategically reshaped its largest DSP relationships to focus on rapidly expanding commerce and high-value advertising verticals such as pharmaceuticals.
A notable indicator of the intensifying competition between major players like Amazon and The Trade Desk is the emergence of Amazon DSP as a top-five buyer on PubMatic’s platform, according to Goel. This shift suggests a broader industry trend of advertisers and their technology partners seeking diversified supply paths and strategic alliances.
Further substantiating the growth in the mid-market segment, ad spend from mid-market DSPs increased by 30% year-over-year in Q4 2025. Pantelick identified mid-market advertisers, represented by these DSPs, as the "fastest-growing segment of the market" in the past year, underscoring the strategic importance of this diversification effort.
PubMatic’s Five-Point Growth Plan
PubMatic’s strategic vision extends beyond agentic AI and DSP diversification, encapsulated in a comprehensive five-point growth plan:
1. Diversified DSP Mix: As detailed above, this involves onboarding new mid-tier and specialist DSPs and optimizing relationships with key partners to ensure a balanced and resilient revenue base. The addition of 50 new DSP partners and a strategic realignment of top DSPs towards high-growth verticals are key achievements under this point.
2. Activate Direct-to-Buyer Business: This initiative, which saw a threefold increase in Q4 2025, represents a significant component of PubMatic’s supply-path optimization strategy. Overall, supply-path optimization accounted for a substantial 55% of the total activity on PubMatic’s platform in 2025, demonstrating the industry’s move towards more direct and efficient ad buying.
3. Continued Growth in CTV, Mobile, and Emerging Revenue Streams: PubMatic is capitalizing on the booming CTV market, with revenue in this sector experiencing a 50% year-over-year increase in Q4 2025, excluding the impact of 2024 political ad spend. Mobile app growth followed suit, rising by 25% in the same quarter. Emerging revenue streams, including Activate, commerce media, and new AI solutions, collectively grew by an impressive 75% in Q4 and now constitute nearly 10% of PubMatic’s total revenue. This diversification into new areas is crucial for long-term sustainability and growth.
4. Emerging AI Solutions: This point focuses on the development and deployment of new AI-driven products and services for publishers. The success of AgenticOS and other AI-powered publisher-facing offerings exemplifies this strategy. Goel expressed his ambition for 100% of PubMatic’s publishers to eventually generate revenue from AI solutions, acknowledging that the current double-digit adoption rate signifies significant future potential.
5. Internal AI Optimizations: PubMatic is leveraging AI to enhance its internal operations and development processes. Notably, 40% of the new code written by the company in the latter half of 2025 was AI-generated, showcasing a commitment to operational efficiency and innovation through AI. This internal adoption not only streamlines development but also positions PubMatic at the forefront of AI integration within the ad tech ecosystem.
Broader Industry Implications and Future Outlook
PubMatic’s strategic emphasis on agentic AI and its proactive diversification efforts come at a time when the digital advertising industry is grappling with profound shifts. The increasing complexity of the programmatic ecosystem, evolving privacy regulations, and the demand for greater efficiency and transparency are creating a fertile ground for AI-driven solutions.
The company’s performance, despite a challenging year marked by shifts in major DSP partnerships, indicates a resilience built on strategic foresight. The positive market reaction to its earnings, particularly its forward-looking bet on agentic AI, suggests that investors are aligning with PubMatic’s vision for the future.
The success of AgenticOS and the rapid adoption of its AI accelerator program suggest that the industry is indeed at an inflection point, with a clear appetite for technologies that can automate complex processes, improve campaign performance, and unlock new revenue streams. As PubMatic continues to execute its five-point growth plan, its ability to navigate the evolving DSP landscape while pioneering agentic AI solutions will be critical in shaping its trajectory and influencing the broader ad tech industry. The company’s strategic investments and innovative product development position it to not only weather current industry headwinds but to potentially lead the charge into the next era of digital advertising.
