--- title: "Pinterest opens ad inventory to outside buyers via Magnite three days before Q3 earnings" description: "Pinterest has thrown open its display and video inventory to outside buyers with Magnite as the toll-taker, the only new revenue lever disclosed before a Q3 print where growth was guided down to 13% to 15% from 18%. The question investors must price: new incremental demand, or margin handed away at scale." publisher: "The Inference" section: "Applications" published: 2026-10-26T16:17:00.288Z modified: 2026-10-26T16:17:00.288Z canonical: https://theinference.org/article/pinterest-opens-ad-inventory-to-outside-buyers-via-magnite-three-days-before-q3-earnings language: en keywords: "Pinterest, Advertising, Programmatic, Magnite, Q3 Earnings" --- # Pinterest opens ad inventory to outside buyers via Magnite three days before Q3 earnings > Pinterest has thrown open its display and video inventory to outside buyers with Magnite as the toll-taker, the only new revenue lever disclosed before a Q3 print where growth was guided down to 13% to 15% from 18%. The question investors must price: new incremental demand, or margin handed away at scale. ## The pipe opens, and the toll booth moves in Three days before [Pinterest](https://theinference.org/markets/companies/pinterest) reports third-quarter results, the company has handed its ad inventory to middlemen. [Programmatic Deals reached general availability on October 26](https://newsroom.pinterest.com/news/pinterest-programmatic-deals/) in North America, South America and Asia Pacific, letting enterprise advertisers buy Pinterest display and video slots through outside platforms instead of only through Pinterest's own sales team [1]. The setup names its winners. Magnite is the primary supply-side platform, the pipe that connects Pinterest's inventory and audience signals to buyers. Demand runs through [Amazon](https://theinference.org/markets/companies/amazon) Ads, Google Display and Video 360 and Yahoo DSP [1]. Magnite also folds Pinterest into Orchestration, its layer where AI agents can find, package and activate ad inventory [1]. ## The pitch is intent, and one pilot is the proof The company's argument for giving up the direct channel is scale and pre-decisional intent: 640 million monthly users running more than 80 billion searches a month, over half commercial, and more than 96% of text searches unbranded [1]. The one disclosed test is Moroccanoil's June campaign, which added Pinterest to an Amazon DSP buy. It added 15% incremental reach with just 1% audience overlap, 63% more new-to-brand buyers, and a 20% higher click-through rate than the brand's average video and display campaigns [1]. *Chart: **The one disclosed pilot: incremental reach, tiny overlap, higher clicks** Bar chart of the three reported Moroccanoil pilot outcomes: 15 percent incremental reach, 1 percent audience overlap, 20 percent higher click-through rate versus the brand's average campaigns.* *Moroccanoil June 2026 campaign via Amazon DSP and Magnite, percentages as reported by Pinterest; unaudited company figures. [1]* ## The complication: who keeps the margin The evidence for new demand is thin and unaudited. [Pinterest declined to say what share of ad revenue already runs programmatic](https://www.adweek.com/programmatic/pinterest-opens-its-inventory-to-programmatic-buyers-with-magnite-as-its-main-pipe/), and the pilot numbers come from Pinterest itself [2]. Selling through Magnite and the DSPs means sharing economics on inventory Pinterest previously sold direct, and commoditized inventory rarely keeps premium pricing. The tell is who is missing. [The Trade Desk](https://theinference.org/markets/companies/the-trade-desk), the largest independent DSP, is absent from the launch list. "We're engaged with everyone that matters," said Jason Fairchild, Pinterest's GM of programmatic [2]. ## The open door The timing is not accidental: growth was guided to 13% to 15% for Q3, down from 18% in Q2, when revenue reached $1.18 billion [2]. Programmatic is the only new revenue lever disclosed before the October 29 print, and it arrives after [Visual Search Ads launched in September and a new CFO, James Dibbo, took office October 5](https://newsroom.pinterest.com/) [3]. Watch Thursday for a number Pinterest has so far refused to give: how much of the business already runs through the pipe. *Chart: **Growth has been fading: guided Q3 would be the slowest since early 2023** Line chart of Pinterest's year-over-year quarterly revenue growth from Q3 2023 to Q2 2026, slowing from above 20 percent in early 2024 toward 18 percent in Q2 2026, with Q3 2026 guided at 13 to 15 percent.* *Year-over-year revenue growth by quarter, from Pinterest's SEC filings; the Q3 2026 point is the company's guidance range of 13% to 15%, drawn at its midpoint. Source: [4]. [4]* Readers can deep dive in the sources below to learn more. ## Takeaway Pinterest opened its display and video inventory to outside programmatic buyers with Magnite as the primary pipe, three days before Q3 earnings where growth guidance sits at 13% to 15%, down from 18%. The open question for Thursday's print: whether programmatic adds incremental demand, or hands away margin on inventory Pinterest used to sell direct. ## Sources 1. [Pinterest Newsroom, Pinterest unlocks premium inventory for programmatic buyers, scaling high-intent discovery, 26 October 2026](https://newsroom.pinterest.com/news/pinterest-programmatic-deals/) 2. [Adweek, Pinterest Opens Its Inventory to Programmatic Buyers, With Magnite as Its Main Pipe, 26 October 2026](https://www.adweek.com/programmatic/pinterest-opens-its-inventory-to-programmatic-buyers-with-magnite-as-its-main-pipe/) 3. [Pinterest Newsroom index, including Pinterest Appoints James Dibbo Chief Financial Officer (5 October 2026) and Visual Search Ads launch (17 September 2026), accessed 26 October 2026](https://newsroom.pinterest.com/) 4. [Pinterest, quarterly figures from its SEC filings, retrieved 26 October 2026](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001506293) --- Pinterest opens ad inventory to outside buyers via Magnite three days before Q3 earnings — The Inference. Canonical: https://theinference.org/article/pinterest-opens-ad-inventory-to-outside-buyers-via-magnite-three-days-before-q3-earnings