Reuters
Deals
 - Berkshire adds GM, Viacom positions in first quarter
 - Japan firms, Tepco eye $4.4 billion stake in Australia LNG project
 - Morgan Stanley cuts stake in KPN to 4.93 percent: regulator
 - India's Piramal Healthcare to buy U.S. firm to boost R&D
 - GE reaches deals to buy two mining equipment firms
 - Rexel buys Platt Electric Supply to expand in U.S
 - Swiss dental firm Straumann drills into Brazil
 - Relational discloses PepsiCo stake
 - Lufthansa may bid for Portugal's TAP airline: FT
 - Brambles talks Recall deal with Shred-it: sources
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