NextFin News - EU antitrust chief Teresa Ribera landed in San Francisco on Tuesday for a high-stakes series of face-to-face meetings with the chief executives of Alphabet, Meta, and OpenAI, signaling a decisive shift in how Brussels intends to police the rapidly consolidating artificial intelligence sector. The itinerary, confirmed by European Commission agenda items, places Ribera in direct dialogue with Sundar Pichai, Mark Zuckerberg, and Sam Altman today, followed by a scheduled meeting with Amazon CEO Andy Jassy on Wednesday. This diplomatic offensive comes as the European Union moves beyond its traditional focus on social media and search to scrutinize what Ribera describes as the "entire AI stack"—from the specialized chips and cloud infrastructure to the data sets and consumer-facing chatbots that define the current technological frontier.
The timing of this Silicon Valley tour is not accidental. Earlier this month, Ribera raised alarms over the potential for dominant tech firms to "entrench corporate power" by leveraging their existing platforms to favor their own AI services. The European Commission is increasingly concerned that the massive capital requirements of generative AI—where companies like Microsoft-backed OpenAI and Google are spending billions on infrastructure—could create a closed loop that excludes smaller rivals. By meeting the architects of these ecosystems on their home turf, Ribera is effectively serving notice that the Digital Markets Act (DMA) and the EU AI Act will be applied with a level of granularity that the industry has yet to fully experience.
Brussels is particularly focused on the vertical integration of the AI supply chain. Ribera has publicly stated her intent to examine the data used to train large language models and the cloud computing power required to run them. This represents a broader regulatory philosophy: the belief that competition in AI cannot exist if a handful of "gatekeepers" control the underlying utilities. For companies like Meta and Alphabet, which are already under the microscope for their advertising and search practices, the expansion into AI represents a new front in a long-running war of attrition with European regulators. The inclusion of Sam Altman in this round of talks is especially telling, marking a transition for OpenAI from a disruptive startup to a systemic player that must now navigate the same antitrust hurdles as the legacy giants.
The meetings also serve as a prelude to Ribera’s appearance at an American Bar Association conference on Friday, where she is expected to further articulate the EU’s vision for a "fair and contestable" AI market. While U.S. President Trump’s administration has generally favored a more deregulatory approach to foster domestic innovation, the EU remains the world’s most aggressive tech regulator. This divergence creates a complex landscape for multinational firms that must balance the rapid deployment of AI tools with the threat of multi-billion-euro fines. The risk for Big Tech is no longer just about past behavior, but about how their current investments in AI might preclude future competition before it even has a chance to emerge.
As the week progresses, the focus will likely shift to the specific "partnerships" that have come to define the AI boom. The EU has already hinted at investigating the multi-billion-dollar tie-ups between cloud providers and AI developers, such as the Microsoft-OpenAI alliance and Amazon’s investment in Anthropic. Ribera’s discussions with Jassy and Altman suggest that these "quasi-mergers" are at the top of her agenda. By scrutinizing the entire stack, the EU is attempting to prevent a repeat of the mobile era, where two operating systems came to dominate the global economy. Whether Ribera can successfully apply these lessons to the more abstract and fast-moving world of artificial intelligence remains the central question for both Silicon Valley and Brussels.
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