Lighthouse shareholders have approved Quilter's £46.2m bid to buy the advice firm.
"At the Court Meeting, a majority in number of Lighthouse Scheme Shareholders, who voted and were entitled to vote, either in person or by proxy, and who together represented over 75%. by value of the votes cast, voted in favour of the resolution to approve the Scheme. The resolution was accordingly passed," Lighthouse said in a statement.
Of the 75% of shareholders voting, 92.38% voted in favour.
The objectors included Paul Mumford, who owns 5% of Lighthouse through his Cavendish AIM fund. The fund manager has said he is "disappointed" at the price Quilter was paying and encouraged rival firms to launch counter bids.
The acquisition will see 400 advisers join Quilter's advice arm Intrinsic, meaning Quilter will have 3,900 advisers - as many as St James's Place.
Quilter advice arm CEO Andy Thompson said: "Following completion, we will look to combine the expertise of both businesses to deliver trusted financial advice."
Lighthouse CEO Malcolm Streatfield too welcomed the deal, calling the two companies "an excellent fit" and adding that Lighthouse "would struggle to find a more complementary business".
Quilter announced last month it will pay £42.2m for the deal, with the remainder of the offer sourced from Lighthouse's excess cash on its balance sheet.
The transaction is expected to increase the financial adviser headcount at Intrinsic to more than 3,900.
The deal is currently subject to regulatory approval.
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