Deals of the day-Mergers and acquisitions
(Adds: Vista Equity, Bunge, ConocoPhillips Updates: Rio Tinto,)
July 12 (Reuters) - The following bids, mergers, acquisitions and disposals were reported by 1430 GMT on Friday:
** Buyout firm Vista Equity is exploring options including a sale of Sonatype in a deal that could value the cybersecurity firm at more than $1.5 billion including debt, according to people familiar with the matter.
** Rio Tinto is studying a refreshed list of takeover targets that includes Canadian miner Teck Resources , Sky News reported, but a source close to the world's second-largest miner said a bid was not imminent.
** U.S. grains merchant Bunge and Glencore-backed Viterra have offered concessions aimed at winning EU antitrust approval for their $34 billion merger, the European Commission website showed.
** Top U.S. independent oil producer ConocoPhillips said it received a second request from the U.S. Federal Trade Commission for information on its proposed acquisition of rival Marathon Oil.
** Global Infrastructure Partners (GIP) and Stonepeak are among the bidders for Singapore Power's 40% stake in Jemena in a potential deal that could value the Australian energy group at over $10 billion, two sources with knowledge of the matter said.
** Australia's competition watchdog has started an informal review of the network sharing deal between TPG Telecom and Optus, owned by Singapore Telecommunications, the regulator said.
** Top shareholder proxy firm ISS has recommended investors vote in favour of Japan's Electric Power Development's (J-Power) A$381 million ($257.56 million) buyout of Australia's Genex Power, according to an ISS report.
** Japan's SoftBank Group has bought artificial intelligence chipmaker Graphcore for an undisclosed sum, ending long-running speculation over the company's future.
** Hedge funds Nut Tree Capital Management and Caspian Capital said on Thursday they have made an offer for Martin Midstream Partners, aiming to scuttle a bid from the fuels storage and transporter's largest shareholder to buy it out.
** Investment firm Anson Funds Management has amassed a stake in Five9 and is urging the U.S. call center software company to consider a sale, people familiar with the matter said. (Compiled by Rajarshi Roy and Christy Santhosh in Bengaluru)