EMARKETER, a company that tracks marketing and ecommerce data, today bought the research team and rankings business from RetailX, another data firm. This matters to marketers and retailers because two well-known rankings, one covering the UK's top 500 online stores and one covering European retailers more broadly, now belong to a different company that also tracks how brands show up in AI search results. The rankings themselves keep running, a US version is coming within weeks, and RetailX's events business stays separate under its own ownership.

EMARKETER today announced the acquisition of the research business belonging to RetailX, folding a UK and European ecommerce ranking operation into its retail and brand intelligence platform. The deal, disclosed in a press release distributed through PR Newswire, brings RetailX's research team, its research tools and its two flagship industry rankings under EMARKETER's ownership, while RetailX's separate events business continues to operate on its own.

The transaction covers two products that retailers and marketers use as reference points for measuring ecommerce performance. The first is The UK500, an annual ranking of the United Kingdom's top 500 ecommerce retailers. The second is The CustomerX Index, a pan-European, cross-sector ranking report. According to the announcement, a new edition of the CustomerX Index is scheduled to launch in late September 2026, and the product line will be extended with new editions covering the United States market.

Neither the acquisition price nor the number of RetailX staff moving to EMARKETER was disclosed in the announcement.

Deal structure and what changes hands

The acquisition is structured around RetailX's research business specifically, rather than the whole of RetailX as a company. According to EMARKETER, the deal merges RetailX's research team, its proprietary research tools, and its rankings and indices into EMARKETER's existing retail and brand intelligence platform. What does not move is RetailX's events business, which the announcement describes as "world-class" and which will continue operating independently, connected to EMARKETER only through what the release calls an ongoing media partnership.

That structure separates two things that had previously sat under one brand: the data and rankings work, and the conferences, networking and insight programs that RetailX built its reputation on in the retail and direct-to-consumer sectors. RetailX itself is described in the release as a leading events and intelligence brand serving those two sectors, connecting commercial leaders through events, networking, and insight programs. The events side keeps that identity and structure. The research side becomes part of a larger company.

For retailers, brands and agencies that have relied on RetailX's rankings to benchmark ecommerce performance, the immediate operational answer from the announcement is continuity: the products keep their names, the annual UK500 output stays annual, and the CustomerX Index proceeds on its existing late-September timeline for its next edition. The change is in ownership and, per EMARKETER's stated intentions, in the depth of data these products will draw on going forward.

The rankings themselves

The UK500 is described in the announcement as the annual ranking of the United Kingdom's top 500 ecommerce retailers. That description places it squarely within the category of ecommerce benchmarking products that retailers and their agencies use to see where they sit relative to competitors, a category that has grown alongside the broader expansion of digital retail spending over the past decade.

The CustomerX Index is characterized as a pan-European, cross-sector ranking report. Unlike a single-country list, a cross-sector, pan-European index compares retailers across multiple national markets and multiple categories of goods, which is a harder methodological undertaking than ranking retailers within one country and one set of regulations. The announcement states that the next edition is set to launch in late September 2026, putting the timing of that release within days of the acquisition announcement itself.

Ranking reports of this kind function as a form of scorecard for the industry: a fixed set of criteria applied consistently so results can be compared year over year and retailer to retailer. A ranking is only as useful to a retailer or brand as the rigor behind how it was compiled, which is why EMARKETER's chief executive addressed that point directly in the statement accompanying the announcement, discussed below.

New data layered onto old products

According to the announcement, EMARKETER intends to enrich both The UK500 and The CustomerX Index with proprietary research the company has developed separately from the RetailX acquisition. The release specifically names data from EMARKETER's newly launched AI Visibility Index as one of the inputs that will be layered onto the acquired rankings. The AI Visibility Index is described as a tool that helps brands and retailers track their visibility in LLM-based search, referring to the large language models that now power conversational search assistants such as ChatGPT, Gemini and Copilot. Much of what those assistants surface depends on retrieval-augmented generation, the process by which a system pulls in outside web content to ground an answer rather than relying only on what was fixed into the model during training, which is why a retailer's presence or absence in an index like this one carries commercial weight beyond a traditional search ranking.

This detail places the acquisition within a broader pattern EMARKETER has pursued this year around AI-driven discovery. The company published a forecast in June 2026 projecting that US advertising spending in and around artificial intelligence platforms would more than double from $32.03 billion to $68.25 billion by 2030, a report authored by the company's principal analyst for AI in marketing and commerce. That earlier work focused on where AI advertising dollars would actually land, distinguishing traditional search ads adjacent to AI-generated content from spending inside chatbot interfaces themselves. The AI Visibility Index, by contrast, is a measurement product rather than a spending forecast: it is built to tell a brand or retailer whether it shows up at all when a shopper asks an AI assistant for a recommendation.

The industry context for that kind of tool has been building for months. An IAB working group set a measurement standard for AI visibility in August 2026 after finding that only 16 percent of brands were tracking their AI visibility systematically at that point, a gap that a growing number of vendors, EMARKETER among them, have moved to address with dedicated indices. By combining that measurement layer with RetailX's ecommerce rankings, EMARKETER is positioning the acquired products to answer two related but distinct questions for a retailer: how does this business rank against its ecommerce peers, and how visible is it when a shopper asks an AI assistant for a recommendation.

Statements from company leadership

Matthias Braun, chief executive officer at EMARKETER, commented on the rationale for the deal. "Ian and the RetailX team have built fantastic reports with a rigorous and trusted methodology," Braun said, according to the announcement. "We are excited to welcome our new team members to EMARKETER who are central to our plans to bring even more value to The UK500 and the CustomerX Index for the retailers that already rely on them as well as the retail and ecommerce industry as a whole."

Ian Jindal, founder of RetailX, also commented on the transaction. "We have long been fans of EMARKETER's insight and I'm delighted that in EMARKETER we have a trusted research partner that will carry on what we have built with the RetailX rankings," Jindal said. "I look forward to the expansion of what we've started and our ongoing media partnership."

Both statements frame the deal as continuity rather than disruption for the products themselves, with Jindal's framing in particular emphasizing that the rankings will be carried forward by a partner rather than absorbed and altered. The announcement does not disclose whether Jindal or other named RetailX research staff are joining EMARKETER directly, remaining with the separate events business, or moving on from the company entirely.

Where this fits in a wider pattern of ad tech consolidation

The RetailX research acquisition arrives during a period of sustained consolidation across advertising and marketing technology, though this deal differs in character from the larger, publicly disclosed transactions that have dominated headlines through 2026. Earlier this year, Nielsen agreed to acquire DoubleVerify for approximately $2.15 billion in an all-cash deal, a transaction that placed the most widely deployed advertising fraud and viewability controls inside the same company that sets United States television audience measurement currency. Around the same time, a takeover approach for Criteo tested private equity's appetite for advertising technology more broadly, illustrating how infrastructure-layer companies in digital advertising have become acquisition targets for both strategic buyers and financial sponsors.

More recently, and closer in scale to the EMARKETER-RetailX transaction, Taboola acquired Dianomi, adding more than 600 finance advertisers and publishers to its network in a deal announced roughly a week before EMARKETER's own announcement. Neither the Dianomi deal nor the RetailX research acquisition disclosed a purchase price, a pattern that distinguishes them from the billion-dollar transactions involving publicly listed companies such as Nielsen, DoubleVerify and Criteo, where disclosure obligations under securities law generally require the terms to be made public.

What connects these transactions, despite their differing scale and disclosure requirements, is a consistent theme: companies that supply data, measurement, or research to the marketing and retail industries are being absorbed into larger platforms rather than continuing to operate as smaller independents. In EMARKETER's case specifically, the RetailX acquisition follows the company's own June 2026 AI advertising forecast and its participation in industry measurement-standard efforts, suggesting that the research business is being built out through both organic product development, such as the AI Visibility Index, and through acquisition of established rankings with existing retailer relationships, such as The UK500 and The CustomerX Index.

Why this matters for the marketing community

For marketers, retailers and brands that use ecommerce rankings as reference points, the practical question raised by any acquisition of this kind is whether the underlying methodology changes once a product changes hands. The announcement itself addresses this directly, with EMARKETER's chief executive praising RetailX's existing methodology as rigorous and trusted, and stating that the acquisition is intended to add value to the products rather than replace their approach.

The more consequential detail for the marketing community may be the stated plan to enrich the acquired rankings with EMARKETER's own AI Visibility Index data. If retailers who currently sit inside The UK500 or The CustomerX Index begin seeing their AI visibility scores reported alongside their traditional ecommerce ranking, that would represent a meaningful expansion in what a ranking report tells a retailer about its market position, extending it beyond web traffic and sales performance and into how discoverable that retailer is when a consumer uses a conversational AI assistant instead of a traditional search engine or retailer website.

This expansion also reflects a broader shift documented across PPC Land's coverage this year in how brands are being asked to measure their own market position. Retail media budgets, ecommerce rankings, and AI visibility tracking have historically been reported as separate disciplines, each with its own vendors and its own methodology. An acquisition that places an established ecommerce ranking product and a newly launched AI visibility product under one research organization suggests those disciplines may increasingly be reported together, which would change how retailers and their agencies interpret a single ranking report going forward, rather than treating ecommerce performance and AI discoverability as unrelated metrics tracked by different tools.

The planned US edition of the CustomerX Index, referenced in the announcement without a specific launch date, is a further point worth monitoring, since a pan-European ranking extending into the United States market would put EMARKETER's combined research operation in more direct comparison with US-focused ecommerce benchmarking products already tracked by the industry.

Timeline

Summary

Who: EMARKETER, a provider of data, forecasts and analysis on digital marketing, media, advertising and commerce trends, and RetailX, a research and events brand serving the retail and direct-to-consumer sectors founded by Ian Jindal.

What: EMARKETER acquired RetailX's research business, including its research team, proprietary research tools, and two flagship rankings, The UK500 and The CustomerX Index, while RetailX's separate events business continues operating independently under an ongoing media partnership with EMARKETER.

When: The acquisition was announced today, September 24, 2026, at 11:13 a.m. Eastern Time, via a press release distributed through PR Newswire. The next edition of The CustomerX Index is scheduled for late September 2026.

Where: EMARKETER is based in New York, where the announcement was issued. The UK500 covers United Kingdom ecommerce retailers specifically, while The CustomerX Index covers a pan-European, cross-sector set of retailers, with a US edition planned.

Why: The deal expands EMARKETER's retail and brand intelligence platform by adding established ecommerce ranking products with existing retailer relationships, while positioning those rankings to incorporate EMARKETER's newly launched AI Visibility Index data, a response to documented gaps in how brands currently track their visibility within AI-powered search and recommendation systems.