Prudential's UK business has seen only muted growth in comparison to its US and Asia arms since the start of the year.
The insurance giant recorded group-wide sales of £1.36bn for the first five months of 2010, up 27%.
Its Asian business posted a 33% jump in sales, while new business in the US soared 41%.
Prudential UK saw muted growth in comparison, with sales up 4% to £322m.
"Our strategy to focus capital on the most profitable geographies and products is delivering excellent results," Pru CEO Tidjane Thiam says.
"We have been consistent in our commitment to our strategy and the proposed acquisition of AIA was intended to accelerate this strategy.
"Throughout the period of our proposed transaction with AIA, our businesses continued to perform strongly, particularly in Asia and the US.
"All of our businesses have a strong momentum and we will continue to focus on delivering shareholder value."
Its asset management arm M&G performed strongly with net inflows of £3.4bn over the first five months of the year.
While the group continues to post strong inflows, the figure was well under the £7.9bn in the corresponding period last year, when its corporate bond funds run by Richard Woolnough dominated investor flows.
"After the exceptionally high levels of net new business experienced in 2009, this continues to be a strong performance in a re-invigorated and competitive environment," parent company Prudential says.
‘Most significant’ upgrade since launch
Changes happening over coming months
Had accepted British Steel business
Aimed at HNW clients and family groups
Set for 1 April 2019