Amazon Ads nears $20 billion in Q3 as agentic AI anchors growth

Amazon's advertising unit generated almost $20 billion in the third quarter of 2025, up 12% year-on-year, according to results published on October 29. The figure makes advertising one of the fastest-growing business units inside a company that posted total Q3 revenue of $201.9 billion, itself a 12% increase over the same period last year.

The number anchors a quarter in which Amazon has positioned agentic AI as a central engine of future ad growth. The earnings release follows the company's flagship unBoxed advertising conference, where it moved to collapse buying silos across its ad products and give AI a larger role in media decisions.

What does the sequential decline signal?

The headline growth rate conceals a small dip between quarters. Advertising revenue fell from $19.81 billion in Q2 to $19.64 billion in Q3, a decline of approximately 0.9%.

The comparison carries one important caveat. Prime Day fell in the second quarter this year rather than the third, inflating Q2 and depressing the sequential reading for Q3. Buyers reading the quarter-on-quarter drop as slowing demand should treat the figure with that calendar shift in mind.

What does this change for advertisers?

For practitioners, the practical question is budget allocation. A unit compounding at 12% year-on-year while approaching a $20 billion quarterly run rate signals continued inventory expansion and pricing power across Amazon's retail media, streaming and owned-and-operated surfaces.

Amazon has not issued a specific dollar forecast for its advertising services division for Q4 or full-year 2026. It has, however, guided to total company revenue of $240 to $247 billion for the coming quarter. Advertising is expected to be a key pillar of that overall growth strategy, even without a standalone forecast attached to it.

The absence of an ad-specific guidance line leaves analysts and agencies to model the division from total-revenue ranges and historical growth rates. The 12% year-on-year pace provides the most reliable anchor available in the published figures.

Where agentic AI fits

The Q3 report arrives as Amazon Ads leans into agentic AI as its next growth lever, a theme that dominated its unBoxed conference coverage. The strategy involves consolidating previously separate buying silos and expanding AI's role in automated media decisions.

That direction matters for media buyers planning 2026 budgets. If AI-driven buying absorbs a larger share of decision-making, campaign structures and team workflows built around manual placement may need to shift toward oversight of automated systems.

The reported figures do not yet isolate revenue attributable to AI-driven ad products, so any claim of direct AI-driven gains remains outside the published data. What the numbers do confirm is scale: nearly $20 billion in a single quarter, growing at double digits, inside a business that Amazon declines to forecast separately but describes as central to its next phase of expansion.

With Q4 guidance of $240 to $247 billion in total revenue and the holiday trading period ahead, the next earnings report will show whether advertising can convert its agentic AI investments into an acceleration of that growth rate.