LONDON, Feb 13 (Reuters) - S&P Global completed the list

of top credit rating agencies to warn that an "unprecedented"

U.S. withdrawal from the World Bank and other top multilateral

lenders would damage their prized triple-A credit ratings.

President Donald Trump signed an Executive Order last week

for a six-month review of U.S. support to all international

intergovernmental organisations to decide whether it should

withdraw from them, or seek their reform.

S&P said the current triple-A ratings of the World Bank and

other top development banks assume the U.S. remaining in place.

Therefore, if Washington were to "limit" its support, any rating

change that came as a result of that was likely to be

"negative".

S&P's top MDB analyst Alexander Ekbom added that it would

ultimately depend on the impact on the individual institution's

capital and whether other major shareholders filled the void

that would be left.

"Should the U.S. leave, which would be unprecedented, it is

difficult to predict how any reallocation would be ironed out,"

he said.