Your Data Broker Profile — The Dossier You've Never Seen

Somewhere, almost certainly, there is a file about you. It may contain your name, address, and phone number. It probably contains your age, household income bracket, and marital status. It may record your magazine subscriptions, the shops you frequent, your political donations, your driving history, the medications in your household, and whether you have ever been involved in a civil lawsuit. It exists because an industry — the data broker industry — has spent decades assembling it, largely without your direct knowledge, and it is available for sale to anyone willing to pay.

Data brokers are companies whose primary business is collecting personal information about individuals and selling it to other organisations. Unlike social media platforms or online retailers, they typically have no direct relationship with the people whose data they hold. You have probably never visited Acxiom's website, opened an account with LexisNexis, or agreed to Experian's terms of service in any direct sense — yet all three of these companies, among many others, are likely to hold substantial records about you.

The scale of this industry is remarkable. Acxiom, one of the largest data brokers, has claimed to hold data on approximately 700 million people worldwide, with up to 3,000 data points per individual (Acxiom, cited in FTC, 2014, p. 11). Experian — widely known as a credit reference agency but also a significant marketing data broker — operates internationally and maintains records on hundreds of millions of consumers. LexisNexis Risk Solutions, a division of RELX Group, aggregates public records, court filings, and commercial data for clients ranging from insurers to law enforcement.

The Federal Trade Commission's 2014 report, Data Brokers: A Call for Transparency and Accountability, examined nine major data brokers and found that collectively they held data on essentially every US consumer, with product offerings that included lists segmented by attributes such as 'Diabetes Interest', 'Bible Lifestyle', 'Smoker in Household', and 'Financially Struggling' (FTC, 2014, p. 46). These are not abstract data points: they are categorisations that can determine whether you are targeted for a payday loan, offered a higher insurance premium, or excluded from a job posting.

Understanding this industry is the first step towards understanding modern digital privacy. The data broker ecosystem is not a visible part of most people's digital lives — it operates almost entirely behind the scenes. But its outputs shape economic and social opportunities in ways that are increasingly well-documented.

How the industry is structured

The data broker industry is not monolithic. Some brokers focus on marketing and advertising, selling audience segments to brands. Others focus on risk assessment, providing background checks to employers or fraud detection services to banks. A third category — people-search sites — sell individual profiles directly to the public, often including information that most people would consider private.

At the same time, credit reference agencies such as Experian, Equifax, and TransUnion occupy a distinct and more heavily regulated position. Their credit files are subject to specific legal requirements in both the UK and the US, including rights of access and correction. Marketing data brokers, by contrast, have historically operated with far less regulatory oversight — a distinction that the FTC's 2014 report identified as a significant policy gap (FTC, 2014, p. 53).