PubMatic, a leading sell-side platform (SSP), is strategically positioning itself at the forefront of a significant industry transformation, declaring that both its company and the broader digital advertising landscape are at a critical inflection point. The company is making a substantial wager on the future of agentic artificial intelligence (AI), a technology it believes will redefine ad execution and campaign management. This bold vision was articulated during PubMatic’s fourth-quarter 2025 earnings call, a period that saw the company report $80 million in revenue, a 6% year-over-year decrease. For the full fiscal year 2025, revenue stood at $282.9 million, marking a 3% decline from the previous year.
Despite the negative growth figures, PubMatic framed its financial performance positively, highlighting that it exceeded its own revenue projections. This optimistic outlook resonated with investors, as PubMatic’s stock price experienced a notable surge of approximately 6% in after-hours trading following the announcement. This market reaction suggests investor confidence in the company’s long-term strategy, particularly its embrace of emerging AI technologies, even as it navigates short-term revenue challenges.
The revenue dip, according to PubMatic’s Chief Financial Officer Steve Pantelick, can be largely attributed to a period of reduced spending from a significant, albeit unnamed, incumbent Demand-Side Platform (DSP). This partner’s recalibration of its investment strategy, which Pantelick alluded to with a subtle implication pointing towards The Trade Desk, created a temporary downturn. To mitigate the impact of this single large partner’s fluctuations, PubMatic has actively pursued a strategy of diversifying its DSP relationships, cultivating new partnerships with midtier platforms that offer substantial growth potential.
Looking ahead, PubMatic CEO Rajeev Goel expressed strong optimism, projecting double-digit business growth in the latter half of the current year. This anticipated rebound is underpinned by several key factors: the increasing adoption of PubMatic’s proprietary AgenticOS platform, robust demand in the Connected TV (CTV) and mobile advertising sectors, and a resurgence in display advertising spend. These combined forces, Goel indicated, are creating a fertile ground for PubMatic’s future expansion.
The Dawn of Agentic Advertising
PubMatic’s long-term strategy is intrinsically linked to the rise of agentic AI in digital advertising. Goel painted a compelling picture of the future, predicting that by 2028, a quarter of all digital advertising will be “executed autonomously via agentic AI.” This share is projected to escalate to a staggering 50% by 2030, underscoring the profound shift underway in how advertising campaigns are conceived, deployed, and optimized.
To capitalize on this transformative trend, PubMatic has proactively positioned itself as an early leader in agentic AI. The company’s launch of AgenticOS, its dedicated platform for agentic AI execution, and its active participation in the development of the Ad Context Protocol, a foundational initiative for understanding agentic ad demand, are central to this strategy. These efforts, Goel asserted, are designed to yield significant dividends as the industry increasingly embraces autonomous ad execution.
Since its inaugural agent-executed CTV campaign, launched in collaboration with the advertising agency Butler/Till in January, PubMatic has successfully facilitated over 250 such campaigns. This rapid deployment highlights the market’s readiness for AI-driven advertising solutions. Notably, many of these agentic campaigns have attracted new advertisers to the PubMatic platform, demonstrating that these advanced solutions are not only optimizing existing spend but are also generating incremental revenue.
Furthermore, PubMatic is structuring its business model to benefit directly from the adoption of AgenticOS. The company is implementing additional fees for campaigns managed through AgenticOS, a model that operates alongside its standard SSP take rate. This approach, akin to the incremental revenue generated by PubMatic’s Activate direct-to-buyer connection, establishes AgenticOS as a distinct and valuable new revenue stream, independent of its core margins.
To accelerate the adoption of this groundbreaking technology, PubMatic has also introduced an AI Accelerator program. This initiative aims to foster deeper integration and utilization of agentic AI among its partners. The program has already garnered significant interest, with nearly 100 brands, agencies, and streaming platforms signing up. Goel characterized this as the “fastest early-stage adoption of any product we’ve launched,” indicating strong market validation for PubMatic’s AI-centric vision.
Navigating the Evolving DSP Landscape
Beyond the strategic pivot to agentic AI, PubMatic’s recent earnings report underscored a significant theme: the evolving dynamics of its relationships with Demand-Side Platform (DSP) partners. The company’s full-year 2025 financial performance was notably impacted by The Trade Desk’s decision in August of the previous year to reclassify all SSPs as resellers. This reclassification prompted The Trade Desk to channel more of its advertising spend towards its OpenPath offering, a direct-to-publisher connection that bypasses traditional SSP intermediaries, thereby impacting PubMatic’s revenue streams.
Both Goel and Pantelick alluded to this pressure, with Pantelick specifically noting that excluding the impact of this unnamed DSP partner and the considerable influence of 2024 political ad spending, PubMatic’s revenue would have shown a robust increase. He projected that Q4 revenue would have been up by 18% year-over-year, and full-year 2025 revenue would have grown by 9%, under these adjusted conditions. This suggests that PubMatic’s underlying business performance, stripped of these specific headwinds, remains strong.
In response to these shifts, PubMatic’s primary growth objective is to diversify its DSP partner ecosystem. This involves actively cultivating relationships with midtier and specialist platforms that are poised for expansion. PubMatic has recently onboarded approximately 50 new DSP partners, a move that Pantelick stated has “reshaped the mix of our largest DSPs towards fast-growing commerce and high-value ad verticals like Pharma.” This strategic recalibration aims to reduce reliance on any single large partner and build a more resilient and balanced revenue base.
The competitive landscape between major players like Amazon and The Trade Desk is also influencing PubMatic’s DSP mix. Goel revealed that Amazon DSP has ascended to become one of PubMatic’s top five buyers, signaling a significant shift in platform engagement and underscoring the intensifying competition within the programmatic advertising ecosystem.
The impact of this diversification strategy is already becoming apparent. Pantelick reported a substantial 30% year-over-year increase in ad spend from mid-market DSPs during the fourth quarter. He further emphasized that advertisers represented by these mid-market DSPs constitute the “fastest-growing segment of the market” over the past year, highlighting the strategic importance of this segment for PubMatic’s growth trajectory.
PubMatic’s Five-Point Growth Strategy
PubMatic’s strategic vision extends beyond agentic AI and DSP diversification, encompassing a comprehensive five-point growth plan designed to propel the company forward.
Point Two: Activate Direct-to-Buyer Growth
The second pillar of PubMatic’s growth strategy is the continued expansion of its Activate direct-to-buyer business. This segment experienced an impressive tripling of revenue in Q4. Activate, which represents a significant portion of PubMatic’s supply-path optimization (SPO) efforts, accounted for 55% of the total activity on the company’s platform in 2025. This indicates a strong market appetite for direct relationships and efficient supply chain management.
Point Three: Growth in CTV, Mobile, and Emerging Streams
The third point focuses on sustained growth within the lucrative CTV and mobile advertising sectors, alongside the development of new revenue streams. Excluding the impact of 2024 political ad spend, PubMatic’s CTV revenue surged by 50% year-over-year in Q4. Mobile app growth remained strong, with a 25% increase for the quarter. Emerging revenues, which include Activate, commerce media, and new AI solutions, demonstrated exceptional growth, increasing by 75% in Q4 and now contributing nearly 10% of PubMatic’s total revenue. This diversification into new areas is proving to be a significant engine for growth.
Legacy Display Advertising Resilience
Amidst these growth areas, PubMatic’s legacy display advertising business also showed resilience, with revenue increasing by 20% in Q4. This suggests that traditional digital advertising formats continue to hold value and contribute to the company’s overall financial health.
Points Four and Five: AI-Driven Innovation
The fourth and fifth points of PubMatic’s growth plan are dedicated to emerging AI solutions and internal AI optimizations, respectively. The company is aggressively integrating AI into its operational fabric. In the latter half of last year, an impressive 40% of new code written by PubMatic developers was AI-generated, showcasing a deep commitment to leveraging AI for internal efficiency and product development.
Currently, 10% of PubMatic’s publisher partners are generating revenue from AI solutions, including AgenticOS and other publisher-facing products. Goel articulated a clear ambition for this figure: "It’s great that it’s in double digits, but that number should be 100% eventually. We’re still early, and there’s a lot of runway ahead of us." This statement underscores PubMatic’s long-term vision for pervasive AI integration across its entire publisher network, promising substantial future revenue potential.
The company’s strategic focus on agentic AI, coupled with its diversification efforts and robust growth in key sectors like CTV and mobile, positions PubMatic to navigate the current industry inflection point. While the short-term revenue figures present challenges, the company’s forward-looking investments and optimistic outlook suggest a strong potential for future recovery and expansion, driven by its commitment to shaping the next era of digital advertising. The embrace of agentic AI, in particular, represents a bold and potentially transformative bet on the future of the industry.
