(Adds T-Mobile, Signify, America Movil ; updates Alexion Pharmaceuticals)
Oct 16 (Reuters) - The following bids, mergers, acquisitions and disposals were reported by 2000 hours GMT on Wednesday:
** T-Mobile US Inc's proposed $26.5 billion tie-up with Sprint Corp won formal approval from the Federal Communications Commission in a vote split along party lines, two sources told Reuters.
** Alexion Pharmaceuticals Inc agreed to buy smaller biotech Achillion Pharmaceuticals Inc in a deal initially valued at $930 million, as the company looks to retain its leadership in treating certain rare blood disorders.
** Signify, the Dutch-based lighting company, has agreed to buy U.S. firm Cooper Lighting Solutions from Eaton Corp for $1.4 billion in cash to boost its presence in North America.
** Brazilian software company Linx SA has agreed to acquire 100% of SetaDigital Sistemas Gerenciais Ltda for up to 36.8 million reais ($8.81 million), it said in a securities filing.
** America Movil, Mexico's largest telecommunications company, said it was open to discussing a deal with Oi SA, amid speculation that the Brazilian telecom carrier is in talks to sell its assets.
** Dutch lighting company Signify has agreed to buy U.S. firm Cooper Lighting Solutions from Eaton Corp for $1.4 billion in cash to boost its presence in North America.
** MGM Resorts International said it would sell its Bellagio and Circus Circus resorts in Las Vegas in separate deals valued together at about $5 billion, as the U.S. casino operator seeks to monetize its real estate assets and bolster its balance sheet.
** Australia's AGL Energy Ltd offered to buy local telecom firm Southern Phone Company in its second attempt this year to expand into the telco sector, aiming to cross-sell broadband and data to its large base of power and gas customers. (Compiled by Praveen Paramasivam in Bengaluru)