Pinterest reported on 29 October that its third-quarter cost of revenue rose to $261.6 million from $212.3 million, and its quarterly filing attributes the increase to higher infrastructure costs, including investments in additional GPU capacity, and higher payments under partner arrangements.
By our arithmetic, cost of revenue grew 23% while revenue grew 12%, to $1,174 million, and gross margin fell from about 79.8% to about 77.7%.
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The key insight: By our arithmetic, Pinterest’s cost of revenue grew 23% while revenue grew 12%, and its 10-Q attributes $28.4 million of the $49.3 million rise to infrastructure costs, including investments in additional GPU capacity.
The 10-Q says cost of revenue rose by $49.3 million in the quarter, and that infrastructure costs rose by $28.4 million “due to increased users and engagement and investments in additional GPU capacity”, as well as higher payments associated with partner arrangements. By our arithmetic, infrastructure was about 58% of the increase.
Research and development rose 15% to $428.1 million, which the filing attributes mainly to a $38.2 million increase in share-based compensation and a 7% increase in personnel expenses. Operating income fell to $30.3 million from $58.5 million.
The filing also describes a restructuring plan, completed in the third quarter, that included “reallocating resources to AI-focused roles and teams that drive AI adoption and execution” and a workforce reduction of less than 15%. Restructuring charges were $65.5 million for the first nine months.
Pinterest average revenue per user by region, Q3 2025 vs Q3 2026: U.S. and Canada rose 10% to $8.38 while Europe fell 7% to $1.21. Source: Pinterest Q3 2026 earnings release (SEC 8-K), 29 October 2026.
Capital Return: ๐น Tax Withholding Repurchases: $100.7M
Comments: ๐ธ โOur differentiated AI-driven visual search and shopping experiences are making Pinterest increasingly valuable for users and advertisers alike. We are focused on sharpening our execution, scaling our performance advertising solutions, and building an ecosystem that captures high-intent discovery and converts it into durable, long-term growth.โ
Wall St Engine on X, 29 Oct: Pinterest Q3 revenue $1.17B (estimate $1.21B), MAUs 661M (estimate 653M), and a Q4 revenue guide of $1.43B to $1.48B against an estimate of $1.52B.
Users Up 10%, Revenue per User Up 1%
Monthly active users rose 10% to a record 661 million. Global average revenue per user rose 1% to $1.80, and the 10-Q says revenuegrowth was “primarily driven by 1% and 4% respective increases in ARPU supported by a 10% increase in average MAUs” for the three and nine months.
The regions moved differently. U.S. and Canada revenue rose 14% to $894 million and ARPU rose 10% to $8.38. Europe revenue was flat at $193 million and European ARPU fell 7% to $1.21. Rest of World revenue rose 24% to $87 million. By our arithmetic, U.S. and Canada users brought in about 6.9 times the revenue per user of European users, and the region supplied about 86% of the quarter’s revenuegrowth.
AI in Pinterest’s Own Words
Chief executive Bill Ready said in the release: “Our differentiated AI-driven visual search and shopping experiences are making Pinterest increasingly valuable for users and advertisers alike.” The 10-Q says the tvScientific acquisition is expected to “extend our AI-powered performance advertising from mobile to connected TV”, for total purchase consideration of $465.1 million.
Guidance and Expectations
Pinterest guided fourth-quarter revenue of $1,425 million to $1,475 million, 8% to 12% growth, and adjusted EBITDA of $538 million to $588 million. Wall St Engine’s post put consensus at $1.52 billion for revenue and $612 million for adjusted EBITDA; by our arithmetic the revenue midpoint is about 4.6% below that consensus figure.
The Structural Read
As we read the filing, the quarter’s revenuegrowth came mostly from more users: global revenue per user rose 1% while monthly active users rose 10%.
As we read the regional table, the U.S. and Canada carried the quarter: by our arithmetic it supplied about 86% of revenuegrowth, while European revenue was flat and European revenue per user fell 7%.
As we read our earlier coverage, the same week Meta reported ad revenue up 25.9% and Alphabet reported Search & other up 12%, while Pinterest reports revenue up 12%.
Bill Ready, Pinterest CEO, Q3 2026 release
“Our differentiated AI-driven visual search and shopping experiences are making Pinterest increasingly valuable for users and advertisers alike.”
Three Implications
FOR ADVERTISERS Pinterest’s 10-Q says it believes the tvScientific acquisition will extend its AI-powered performance advertising from mobile to connected TV.
FOR INVESTORS Pinterest guided fourth-quarter revenue of $1,425 million to $1,475 million; Wall St Engine’s post put consensus at $1.52 billion.
FOR OPERATORS The 10-Q says Pinterest completed a restructuring that reallocated resources to AI-focused roles and cut its workforce by less than 15%.
The framework says: “Search gives way to assistants.” It places “the end of incumbent dominance in software and search” in what it calls a medium cycle of 10 to 20 years.
Pinterest’s release describes AI-driven visual search and shopping experiences. The framework does not discuss Pinterest, and Pinterest does not use the framework’s terms.
What Is Not Established
The filing does not break out how much of the $28.4 million infrastructure increase came from GPU capacity rather than user growth and engagement. The consensus figures are Wall St Engine’s, not Pinterest’s. The growth rates, gross margins, ratios and shares of growth are our arithmetic from Pinterest’s reported figures.
This Week In The AI Supercycle
Execution Fault Lines, Concentrated Demand, and Geopolitical Firewalls
This week’s issue: the AI build is not short of demand for its parts. It is short of cheap money, and its end revenue rests on a narrow base of large, often venture-funded buyers.
Pinterest grew revenue 12% to $1,174 million on record users, while its cost of revenue rose 23%, which its 10-Q attributes to infrastructure costs, including additional GPU capacity, and partner payments; U.S. and Canada supplied most of the growth and European revenue per user fell.
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A note on sourcing. Figures come from Pinterest’s third-quarter 2026 earnings release and Form 10-Q, both filed with the SEC on 29 October 2026 and read that day; consensus estimates come from a Wall St Engine post on X. Growth rates, margins, ratios and shares of growth are our arithmetic. We did not contact Pinterest.
Gennaro Cuofano is a CRO and tech executive who has worked in AI since late 2015, starting with bringing NLP, natural-language generation, voice and chatbot products to the marketing industry. His background is in law and finance: he holds a Master's degree in Law and an International MBA with an emphasis on corporate finance (LUISS Business School and the University of San Diego, 2012), and worked as a financial analyst at a real-estate investment firm in San Diego and as an assistant controller. His work focuses on business model strategy, business engineering and, more broadly, structural analysis: how companies make money, read from their own filings. He created FourWeekMBA and leads research there and at The Business Engineer, his newsletter on AI and business strategy, with over 95,000 subscribers and more than 1,000 published analyses. His writing has also appeared on Entrepreneur (for example, How to Digitize a Family Business in Europe) and HackerNoon. Find him on LinkedIn and Substack. See how we source.
