Amid the ongoing probes of tech giants, DOJ's antitrust chief warns that amassing vast quantities of consumers' data could create competition concerns
CAMBRIDGE, Mass. — The Justice Department's top antitrust enforcer warned tech giants on Friday that amassing vast quantities … Tweets: @tonyromm , @alexqgb , and @markseibel Tweets: Tony Romm / @tonyromm : NEW: DOJ's top antitrust enforcer, Makan Delrahim, will lay out his case for why data and privacy could be an antitrust issue, making latest shot across bow at big tech. Better yet, he'll do it at a conference hosted by tech giants in Boston. https://www.washingtonpost.com/ ... Alex Bowles / @alexqgb : Divest or Die I guess https://twitter.com/... Mark Seibel / @markseibel : DOJ ties privacy to potential antitrust concerns. https://www.washingtonpost.com/ ...
Context & Ripple Effects
Delrahim's speech extends an argument he had already been building all year: back in June he laid out the potential antitrust theories the US government might use against big tech, and in July the DOJ formalized them into an antitrust review of search, social media, and retail platforms. What changes here is the input to that framework — he is now arguing that the volume of consumer data itself, not just exclusionary conduct of the kind documented at Google, Facebook, and Amazon in earlier coverage, can be the competition problem.
The venue matters too: delivering the warning at a Boston conference hosted by the very companies under probe turns an academic debate about privacy-versus-competition into a direct shot across the bow, and it pre-commits the DOJ to treating data accumulation as a screenable merger and conduct concern.
First-order effects
- Tech giants under the DOJ review now face a theory of harm where their core asset — accumulated user data — is itself evidence of market power, meaning privacy practices become antitrust inputs rather than a separate regulatory track.
Second-order effects
- Privacy product decisions acquire antitrust stakes: coverage of Google's pro-privacy ad-tracker plan shows publishers already arguing a privacy change can entrench dominance, so any platform move framed as pro-privacy will now be tested against Delrahim's data-concentration logic.
Third-order effects
- If the data-as-market-power framing holds across administrations, competition enforcement converges with privacy policy — a line visible years later when DOJ antitrust leadership was examining 'monopoly choke points' across AI, cloud, data, and GPUs, suggesting the doctrine generalizes from consumer data to compute and models.
The trend: Antitrust enforcement is expanding from conduct-based monopoly claims toward treating the accumulation of strategic inputs — consumer data, then compute and AI infrastructure — as market power in itself.