Reconciliation to the most comparable GAAP measures are available in today's earnings press release, which is available on our investor relations website at ir.doubleverify.com. In Q4, we delivered a strong 38% adjusted EBITDA margin and 8% year-over-year growth in revenue, demonstrating the strength of our operating model even as revenue came in below expectations. Outside of mobile, both programmatic display and video measurement impressions grew at double-digit rates in 2025. Social activation accelerated meaningfully, growing at approximately 60% year-over-year in Q4 and starting 2026 at an even stronger year-over-year growth rate.
CTV measurement impression volumes also grew impressively, up 22% for the quarter, continuing their cadence of outsized growth. Together, the areas which are most important for a durable growth story in the future are setting us up for a strong 2026. DV's growth cycle and trajectory is foundationally shaped by the timing of product releases, platform enablement, and customer adoption. With social and CTV innovations now broadly available and AI capabilities continuing to expand, we've entered 2026 with a more diversified revenue mix driven by a broader product offering.
As a result, average revenue per top 100 customers grew by 7% for the year to $4.5 million. We grew total full-year revenue 14% year-over-year, well exceeding the 10% growth outlook we provided at the start of the year. This momentum delivered strong profitability and cash generation with a 33% adjusted full-year EBITDA margin and $211 million in net cash from operating activities. In all of these evolutionary cycles, what has never changed is why marketers buy ads, their need for measurement, and their demand for trust and transparency.