Deals of the day-Mergers and acquisitions

May 22 (Reuters) - The following bids, mergers, acquisitions and disposals were reported by 2000 GMT on Thursday:

*The family office of Japanese billionaire Tadashi Yanai, founder and chief executive of Uniqlo operator Fast Retailing 9983.T, has agreed to buy a building in Milan for about 300 million euros ($339 million), a source close to the matter said on Thursday. nL8N3RU1EE

The United Steelworkers union urged U.S. President Donald Trump on Thursday to block Nippon Steel's 5401.T bid for U.S. Steel X.N despite a pledge by the Japanese steel giant to invest $14 billion in the iconic American company, as first reported by Reuters. nL1N3RU101

UK chemicals company Johnson Matthey has agreed to sell its catalyst technologies business to Honeywell International for 1.8 billion pounds ($2.4 billion), including debt, it said, driving its shares up by a third.

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Spanish telecom company Telefonica said on Wednesday it agreed to sell its Uruguayan unit for $440 million to Luxembourg-based Millicom International as part of its strategy to exit Spanish-speaking Latin America.

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India's Bajaj Auto plans to take control of KTM AG as part of an 800 million euro ($906.2 million) debt package aimed at reviving the troubled Austrian motorcycle maker, it said. nL4N3RU0DF

Sanofi will acquire Vigil Neuroscience , a clinical-stage biotech company in a $470 million deal, the companies said, as the French drugmaker seeks to boost its neurological pipeline through an Alzheimer's drug.

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AT&T has clinched a deal to acquire Lumen Technologies' consumer fiber operations for $5.75 billion in cash, the companies said on Wednesday, as the wireless provider adds further scale to its national fiber footprint. nL1N3RT0XO