Viant's Proprietary Data Surge Collides With Ad Tech's Fast-Accelerating M&A Wave

Viant's Q2 Jump, the Deal Flurry and TIME's Chatbot Ad Backlash

Viant reported second-quarter revenue of $104.3 million, a 34% increase from $77.9 million a year earlier, but investors barely moved the stock. Shares have traded roughly flat since Monday, while The Trade Desk has lost about a third of its value since its own earnings report last week. The contrast is notable because Viant’s leadership framed the quarter around a strategic shift rather than a one-time swing: the company increasingly sees proprietary data as its main competitive edge.

On the earnings call, CEO Tim Vanderhook and COO Chris Vanderhook repeatedly emphasised data exclusivity from assets such as IRIS.TV and TVision, and Tim Vanderhook said Viant is open to opportunistic acquisitions that would add more proprietary data. He took direct aim at The Trade Desk’s reliance on third-party data, describing it as undifferentiated. That posture matters beyond one quarter because it captures a broader structural change: standalone ad tech intermediaries that once sold neutral tools to all sides are being pulled into larger stacks.

The week’s deal activity illustrates how fast the boundary lines are moving. Nielsen agreed to buy DoubleVerify for $2.15 billion, after DoubleVerify had already moved from measurement toward activation by acquiring Scibids in 2023. Publicis announced a $2.2 billion deal for LiveRamp in May. Last month, private equity firms, one of which is Vista Equity, made a takeover approach to Criteo. Even The Trade Desk, now worth about $6.25 billion by market capitalisation, is being discussed as an opportunistic target.

Separately, TIME is facing criticism over reports that it created sponsored ad formats designed to influence chatbot answers as a way to monetise bot traffic. Perplexity blocked those ads from its models, and its communications chief said the company would protect users from deceptive formats. The dispute reflects a wider worry: AI monetisation tactics are moving faster than the rules governing them, and other language models may remove publisher ads aimed at shaping AI outputs.

What Viant, Nielsen, Publicis and Perplexity Signal for Ad Tech

Viant’s proprietary-data bet versus The Trade Desk’s third-party path

Viant’s argument is that exclusive identity and measurement assets create a pricing and targeting advantage that widely available data cannot. The 34% revenue growth gives the company a basis for that claim, while TTD’s share slide strengthens the narrative in the short term. The key caveat is causal: Viant has not shown that proprietary data alone drove the gain, and TTD’s decline may reflect broader investor disappointment rather than a simple loss to Viant. Still, the strategic divergence is real, and it sets up a direct competitive test over the next few quarters.

Why the middle layer of ad tech is disappearing

The Nielsen–DoubleVerify and Publicis–LiveRamp deals are not isolated purchases. They continue a pattern in which measurement, identity and activation tools are folded into platforms or media owners. DoubleVerify had already crossed from measurement into activation with Scibids, and Criteo’s private equity approach suggests that even scaled independent players are being priced for consolidation. With a more permissive regulatory climate and lower valuations, the historical neutrality role is becoming harder to defend commercially.

The risks in the TIME–Perplexity AI ad dispute

TIME’s reported markdown-style sponsored content was designed to be readable by AI systems, but Perplexity’s block shows how quickly a publisher’s AI monetisation tactic can become a reputational liability. The deeper issue is that AI search engines must protect the quality of their organic answers while also introducing their own ad products. If other LLMs follow Perplexity in stripping out publisher-designed AI ads, publishers may find that optimising for chatbot visibility is an unstable revenue channel, especially when formats are perceived as deceptive.

Moves for Ad Tech Vendors, Advertisers and Publishers

For the operators and buyers most directly affected, the consolidation wave changes the negotiating map.

• Independent ad tech vendors: The LiveRamp and DoubleVerify outcomes show that neutrality is being priced at a discount. If your product depends on widely accessible third-party data, define a proprietary dataset or measurement asset now—Viant’s IRIS.TV and TVision are the template, not an anomaly.
• Advertisers using measurement or identity vendors: Nielsen’s DoubleVerify purchase and Publicis’s LiveRamp deal mean key tools may no longer be neutral across competing stacks. Before renewing contracts, ask whether your vendor’s new owner creates conflicts with your media or data partners.
• Publishers testing AI-facing ad formats: TIME’s Perplexity block demonstrates that markdown or FAQ-style ads can be removed or publicly criticised. If you use such formats, label them clearly and review each major AI platform’s policy before relying on the revenue.
• Investors watching the sector: Viant’s next earnings report will test whether the 34% revenue growth continues, while The Trade Desk’s $6.25 billion market value makes a credible takeover approach a live question. The Criteo process and any completion of the Nielsen–DoubleVerify or Publicis–LiveRamp deals are the next concrete signals.