Record Quarterly Financial Results
Q4 2025 revenue $110.1M, up 22% year-over-year and 29% sequentially; Q4 contribution ex-TAC $64.6M, up 19% year-over-year and 22% sequentially; Q4 adjusted EBITDA $24.7M, up 45% year-over-year and 54% sequentially, exceeding the high end of guidance.
Strong Full-Year 2025 Performance
FY 2025 revenue $344.2M (+19% YoY); contribution ex-TAC $208.7M (+18% YoY); adjusted EBITDA $57.4M (+29% YoY); adjusted EBITDA margin expanded ~250 basis points to ~28%; non-GAAP net income $41.1M (+19% YoY).
Robust Cash Flow and Balance Sheet
Cash and cash equivalents $191.2M, no debt, positive working capital $219.2M; cash flow from operations $33.1M (+101% YoY); free cash flow $28.2M (+132% YoY); $59.6M returned to shareholders via buybacks since May 2024.
CTV Leadership and Adoption
CTV reached an all-time high representing 46% of total advertiser spend in Q4; CTV contribution ex-TAC increased >40% YoY for the second consecutive year; nearly 50% of full-year CTV spend transacted through the Direct Access Premium Publisher program.
Addressability Scale — Household ID
Household ID embedded in over 80% of programmatic bid requests and over 90% of CTV requests; 95% of household addresses mapped to Viant's ID graph, covering over 115M U.S. households and claiming ~4x coverage vs. competitors.
Rapid IRIS ID Traction
IRIS ID presence in the CTV bidstream grew ~5x to nearly 50% of incoming CTV bid requests (since acquisition); Q4 revenue attached to IRIS utilization increased 90% sequentially, with advertisers bidding up for IRIS-enabled inventory due to improved performance.
Launch and Early Success of Outcomes (Viant AI)
Introduced Outcomes, an autonomous AI decisioning solution powered by the AI Lattice Brain; >20 customers tested Outcomes with strong case-study performance (examples below), positioning Viant to compete for performance budgets currently dominated by walled gardens.
Documented Case-Study Performance Gains from Outcomes
Selected customer results: MacKenzie-Childs: 58% lower cost per conversion and ~180% more total sales vs. human control; UMass Global: 82% lower cost per outcome; Kampgrounds of America: 76% reduction; Tire Discounters: 43% reduction; Uqora: 95% reduction; Alzheimer’s Association: 68% reduction.
Operational Efficiency Improvements
Trailing-twelve-month contribution ex-TAC per employee up >8% YoY, marking 10 consecutive quarterly increases; non-GAAP operating expenses rose modestly with organic op ex +5% YoY (excluding acquisitions).
2026 Guidance Highlights
Q1 2026 guidance: revenue $83M–$86M (midpoint +20% YoY), contribution ex-TAC $49M–$51M (midpoint +17% YoY), adjusted EBITDA $8.5M–$9.5M (midpoint +67% YoY) and expected adjusted EBITDA margin improvement (~+500 bps YoY at midpoint). Management expects sequential acceleration through 2026 driven by new clients, Outcomes adoption and political spend in H2.