BT Investment Management (BTIM) has agreed to purchase fund manager J O Hambro Capital Management for $314 million.
The acquisition will make a meaningful contribution to earnings, help drive future growth, boost margins and enhance diversification of BTIM's business, BTIM said.
BTIM said it would undertake a capital raising at a price of $2.15 per new share to raise up to $275 million to partially fund the acquisition.
BTIM will hold an extraordinary general meeting to approve the issue of new securities on 18 August.
London-based J O Hambro Capital has around $10.7 billion in funds under management, and has experienced net inflows of nearly $4 billion in the 12 months to 30 June, BTIM said.