The Trade Desk, Inc. (NASDAQ:TTD) shares plunged 21.9% on Friday, making the company the S&P 500’s worst performer, after a weak second-quarter report turned a long-running agency dispute into a harder question about the durability of its business model.

Revenue increased just 3% to $715 million, below Wall Street’s approximately $753 million estimate and the company’s prior outlook of at least $750 million. The third-quarter forecast was more damaging. Management expects revenue of at least $650 million, compared with the roughly $807 million analysts had expected, and adjusted EBITDA of approximately $160 million. At the $650 million guidance floor, third-quarter revenue would decline approximately 12% year over year.

The central question is no longer whether The Trade Desk, Inc. (NASDAQ:TTD) can repair its relationship with Publicis. The companies have already reconciled. The question is whether weaker spending from existing clients reflects temporary execution problems or a loss of leverage with agencies and advertisers.

BULL CASE: THE TRADE DESK’S PLATFORM STILL HAS STRONG DEFENSES

The bull case begins with the lack of evidence of a widespread client or agency departure. Customer retention remained above 95%; Publicis is again recommending The Trade Desk, Inc. (NASDAQ:TTD) to clients, and major agencies continue developing new offerings around the platform.

In March, Publicis advised clients against using The Trade Desk following an audit dispute involving fees and the activation of additional features. The Trade Desk, Inc. (NASDAQ:TTD) disputed the agency’s account and said some requested information could not be provided without compromising customer and partner confidentiality. The companies reconciled in June, ending the public rupture before the second-quarter results were released.

Other agency relationships also continued moving forward. Dentsu selected The Trade Desk as the first demand-side platform for its new retail-data offering. The company had joint business plans with 217 clients as of the second quarter, up 38% year over year, and management said revenue associated with those plans was growing six times faster than companywide revenue.

The company’s access to premium inventory and valuable consumer data is also expanding. Netflix joined its scaled publisher marketplace, Samsung Ads opened premium home-screen inventory, and integrations with Booking.com, Marriott, Uber, United Airlines and other travel companies added new commerce signals. Retailers participating on the platform represent more than 80% of U.S. retail sales, according to management.

These partnerships reinforce The Trade Desk, Inc. (NASDAQ:TTD)’s strategic appeal as an independent buying platform that does not own the media it recommends. Advertisers can use the platform to compare impressions across the open internet without directing spending toward inventory controlled by the same company selling the advertising technology.

That independence becomes more valuable as advertisers combine first-party data with streaming, retail-media and travel signals. It gives The Trade Desk, Inc. (NASDAQ:TTD) a different proposition from Amazon and Google, which combine advertising technology with proprietary inventory, identity and consumer data.

The company also has sufficient financial capacity to improve its platform without depending on outside financing. It generated $136 million of free cash flow during the quarter, ended June with approximately $1.5 billion of cash and short-term investments, and repurchased $78 million of stock.

The constructive argument is that the slowdown reflects a combination of cautious advertising budgets and fixable execution problems. The forthcoming Zuma usability upgrade to Kokai, the expansion of Audience Unlimited and new measurement tools are intended to make the platform easier to use and its performance easier to demonstrate. If those improvements restore spending among large clients, the current weakness could prove to be an execution setback rather than a lasting competitive decline.

BEAR CASE: WEAKER CLIENT SPENDING IS NOW HITTING EARNINGS

The bear case is that The Trade Desk retained its clients but captured less of their advertising budgets.

Gross spend from existing clients declined year over year, partly offset by more campaigns from new clients. Higher value-added-service pricing and changes in the presentation of certain supplier costs also contributed to the 3% revenue increase. Retention therefore remained high while aggregate spending from existing clients moved in the opposite direction.

That distinction is damaging because The Trade Desk, Inc. (NASDAQ:TTD)’s model depends on expanding the amount of advertising routed through its platform. A client can remain active while shifting more of its budget to Amazon, Google, another demand-side platform, or direct publisher relationships.

Agency concentration makes those spending decisions more consequential. The company’s filing says that two agency holding companies would each have represented more than 10% of 2025 gross billings if their individual agency relationships were aggregated. A change in preference at one major holding company can affect spending even when the underlying advertisers remain customers.

The Trade Desk must also defend premium pricing while competing with platforms that control their own inventory and consumer data. CEO Jeff Green reiterated that the company wants to offer the best platform rather than the cheapest one. The filing indicates that higher value-added-service pricing supported revenue, while volume and other discounts associated with joint business plans offset part of that benefit.

The issue is whether advertisers are receiving enough measurable value to justify that premium. Management acknowledged that measurement and proof of incrementality had lagged in recent years. Improving those capabilities has become central to restoring growth because advertisers facing tighter budgets are likely to demand clearer evidence that The Trade Desk, Inc. (NASDAQ:TTD) produces better outcomes than cheaper or more integrated alternatives.

Management attributed the slowdown to macroeconomic pressure on several large advertisers and internal execution. Consumer-packaged-goods and automotive advertisers together account for roughly one-quarter of the business, and brands exposed to lower-income consumers have been cautious.

However, management did not provide a clear breakdown of the $35 million shortfall against its own second-quarter revenue floor. Investors were left without a firm measure of how much came from economic weakness, product execution, agency relationships or competitive share losses.

The third-quarter forecast makes that uncertainty harder to overlook. CFO Nate Olmstead said visibility was more limited than in recent history and that the guidance assumes no meaningful improvement during the quarter. The revenue floor is almost 20% below the previous analyst consensus, while the adjusted EBITDA forecast of approximately $160 million points to another sharp deterioration in profitability.

Wall Street responded by reassessing the company’s competitive position. Raymond James, Truist and Susquehanna were among the firms that downgraded the stock. Evercore ISI said the size of the shortfall raised the possibility of meaningful pricing changes or market-share losses.

The earnings damage is already visible. The unresolved issue is which part of the business created it. Until The Trade Desk, Inc. (NASDAQ:TTD) stabilizes spending among large existing clients, investors have little reason to treat the third-quarter guidance as an isolated reset.

INSIDER MONKEY’S HEDGE FUND DATA ANALYSIS

Insider Monkey’s first-quarter database already showed a more cautious setup around The Trade Desk, Inc. (NASDAQ:TTD). 45 hedge fund portfolios held TTD at the end of March, down from 60 in the previous quarter.

These figures reflect holdings as of March 31, 2026, before TTD’s second quarter report.

DID THE AGENCY PROBLEM BECOME AN EARNINGS PROBLEM?

Yes. The agency problem has become an earnings problem because concerns about agency trust, pricing power, and platform preference can no longer be separated from declining existing-client spending, slowing revenue growth, and guidance that points to further deterioration.

The Trade Desk still has meaningful competitive defenses. Publicis again recommends the platform, Dentsu is expanding its relationship, customer retention remains above 95%, and major media and commerce partners continue opening their inventory and data.

However, the weak guidance is too severe to dismiss as one disappointing quarter. The filing confirms that aggregate gross spend from existing clients declined, while management has not identified whether the pressure came mainly from cyclical advertisers, large agency holding companies, product execution, or budget shifts toward competing platforms.

The next test is not another partnership announcement. It is whether The Trade Desk, Inc. (NASDAQ:TTD) can stabilize large-account spending, translate its rapidly growing joint business plans into companywide growth and rebuild margins without materially weakening its pricing.

If spending recovers following the product and measurement upgrades, the Publicis dispute may ultimately look like a noisy negotiation that coincided with an execution slump. If retention remains high while existing clients continue routing less money through the platform, the market will have stronger evidence that The Trade Desk, Inc. (NASDAQ:TTD)’s independent-platform advantage is losing economic force.

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