Sunac's decision casts further doubt over Kaisa's ability to service its $11 billion of debt, including about $2.5 billion of offshore loans that it defaulted on in April,
The all-share offer includes about $777 million of assumed debt and comes four months after Calgary-based Legacy put itself on the block.
Sirius shareholders will receive stock in a new mining company, S2 Resources.
Aveva's delayed and over-budget nuclear projects will complicate negotiations.
Alfa will increase its holding in Pacific Rubiales to 50%, leaving Harbour Energy to purchase the remaining half.
This continues the rapid pace of deal making that has allowed Drahi to parlay Altice's stake in French cable operator Numericable into a telecom conglomerate.
The purchase will give DCC one quarter of the market share in Western Europe's second largest LPG market.
The bidders' $6.4 billion offer follows a six-month slump in Pacific Rubiales' share price that had wiped out more than 75% of its value.
BHP Billiton shareholders Wednesday backed a big spinoff, voting to create South32 -- a new global mining company that could be an instant acquisition target or start gobbling up rivals.
North American regulators give their blessing to the $39 billion building materials union, while a major Holcim shareholder pledges support ahead of Friday's shareholder vote.