Prudential Financial Inc.'s Prudential Retirement has concluded $3.2 billion of previously undisclosed longevity reinsurance contracts in the U.K.

The transactions see Prudential Insurance Co. of America take on the longevity risk for about 13,200 retirees. Prudential said the affordability of pension buy-ins and buy-outs has risen of late, amid improved funding statuses among U.K. retirement schemes.

"The average U.K. pension scheme is at or near full funding, a material improvement over the last two years," said Prudential's head of longevity risk transfer, Amy Kessler. "That is happening at the same time longevity improvements have slowed, which has made pension de-risking more affordable than it has been in years."

No information was provided about the pension plans involved in the transactions.