August 4 (Reuters) - The following bids, mergers, acquisitions and disposals were reported by 0930 GMT on Monday:

** Singapore's sovereign wealth fund GIC will acquire a 25% stake in a fibre optic broadband venture between MasOrange, partly owned by France's Orange <ORAN.PA>, and Vodafone Spain, which is owned by Britain's Zegona Communications <ZEG.L>, the three companies said. nL1N3TV061

** Bahrain's sovereign wealth fund, Mumtalakat, has acquired a stake in BlueFive Capital, the Abu Dhabi-based private equity firm said. nL1N3TW04Q

** Mitsubishi 8058.T has made an offer to increase its stake in Thai Union Group Public Company Limited TU.BK, a major canned tuna producer, to 20% from 6.19%, both companies said on Monday, as the Japanese trading house expands further into the food business. nL8N3TW01T

** Australia's BlueScope Steel BSL.AX said on Monday it has assembled a heavyweight consortium of global steelmakers to bid for Sanjeev Gupta's troubled Whyalla Steelworks, over a month after the local government formally opened a sale process. nL1N3TV05Q

** China Mobile <600941.SS>, the world's biggest wireless carrier by users, said it had bought a 14.4% stake in Hong Kong-based broadband service provider HKBN <1310.HK> for HK$1.08 billion ($137.58 million). nL4N3TW09D

** Australia's Medallion Metals <MM8.AX> said it has negotiated the terms for the acquisition of Forrestania nickel operation in Western Australia from IGO <IGO.AX> in exchange for a royalty. nL4N3TV06D

** Amphenol <APH.N> is nearing a deal to buy communication network infrastructure provider CommScope Holding's <COMM.O> connectivity and cable unit, in a deal valued at roughly $10 billion including debt, the Wall Street Journal reported on Sunday, citing people familiar with the matter. nL1N3TV05F

(Compiled by Rajarshi Roy and Anshi Sancheti in Bengaluru)

((Anshi.Sancheti@thomsonreuters.com))