A coalition of investors is challenging ice cream giant Magnum over its handling of Ben & Jerry's social activism and a perceived lack of financial transparency, according to a letter seen by Reuters .

The shareholders, who collectively hold at least $1.3 million in Magnum stock and manage billions in assets, have demanded clarity on how the company plans to uphold Ben & Jerry's board independence and provide separate sales and profit figures for the brand.

This pressure highlights the ongoing challenge that Ben & Jerry's, known for its vocal social activism, poses to The Magnum Ice Cream Company.…