Chelsea Stevenson
The Toronto-based firm has raised $3.6bn toward its $4.5bn target.
The investment comes the same week as Partners and a group of investors acquired healthcare company MultiPlan for $4.4bn.
Ritu Kumar has joined the UK development finance institution as a director.
Apax portfolio company King Digital Entertainment, which owns mobile game Candy Crush Saga, is seeking $500m in an IPO.
The investment marks the third deal from CD&R's Fund IX, which is expected to close in the first quarter.
The energy and financial services-focused firm raised $2.43bn on a $2bn target.
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The lower mid-market firm has collected $90m for its Fund IX.
The Dallas-based distressed investor closed its prior fund on $5bn last May.
The firm's second mid-market buyout fund surpassed its $1.6bn target.
The firm invested $32m in healthcare services company Specialists On Call.