Shareholders of both Aberdeen Asset Management and Standard Life have approved the proposed £11bn merger, which is due to complete on 14 August.
At the firms' general meetings today, Standard Life and Aberdeen shareholders overwhelmingly backed the move with 98.6% and 95.81% of the votes respectively.
"I'm delighted our shareholders have voted to support the merger today," said Standard Life chairman Sir Gerry Grimstone.
"Our merger with Aberdeen will be one of the most significant events in our near-200 year history, creating a well-diversified world-class investment company,"
Meanwhile, 94.55% of Standard Life shareholders approved the directors' suggested remuneration policy, compared to 78.6% of Aberdeen voters.
"We are pleased with the overwhelming support Aberdeen shareholders have shown for the proposed merger," said Aberdeen chairman Simon Troughton.
"They recognise the strategic and financial rationale of the transaction, which will create the UK's largest active asset manager and one of the top 25 globally.
"The two businesses' investment capabilities and distribution channels are highly complementary and by combining them we are well positioned to compete in an evolving global market environment.
"The strengths of the combined businesses in multi-asset and solutions, alternatives and active specialities, such as emerging markets, are strongly aligned to the needs of clients now and in the future."
Standard Life's Grimstone added that while there were "still some approvals to be granted" before the merger could be finalised, he was confident of a 14 August completion date.
He said: "Proudly headquartered in Scotland, and employing some of the best talent in our industry, our new combined company will continue to put our customers and clients across the world at the centre of everything we do."
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