Mason Capital Management LLC's Kenneth M Garschina said he wants Grifols SA's board replaced.

The co-founder of the New York-based hedge fund demanded a seat on the Grifols board during Brookfield Asset Management's failed attempt to win control of the company. Now he's orchestrating a campaign to revamp the drug maker's board, namely by ousting Tomas Daga, a veteran director and long-time friend of the founding family.