BRUSSELS, March 24 (Reuters) - EU antitrust chief Teresa

Ribera, who has voiced concerns about Big Tech extending its

dominance into artificial intelligence, will meet the CEOs of

Alphabet, Meta Platforms ( META ) and OpenAI on

Tuesday, a European Commission agenda item shows.

The first-time meetings with Sundar Pichai, Mark Zuckerberg,

and Sam Altman in San Francisco will take place as part of

Ribera's week-long trip to the United States where she is

scheduled to speak at an American Bar Association conference on

Friday.

She will also meet Amazon ( AMZN ) CEO Andy Jassy on Wednesday.

Ribera, who has launched several investigations into Google

and Meta's business practices, this month said she was examining

the entire AI stack, including AI chatbots, the data used to

train them and the cloud computing infrastructure.

The European Commission, which acts as the EU competition

enforcer, has said risks are emerging as dominant companies

favour their AI services on their own platforms to exclude

rivals.

Technology giants, including OpenAI, Nvidia, Meta and Google

have been investing billions on AI infrastructure to cater for

booming demand.