Key TakeawaysBrookfield and family member shareholders of Grifols are in talks to take the Spanish pharmaceutical firm private.The potential buyers asked the board for information so they could do due diligence.Both sides say no agreement has been reached. American depositary receipts (ADRs) of Grifols (GRFS) gained for a second day Tuesday on word Canadian investment manager Brookfield and family member shareholders are in talks to take the Spanish pharmaceutical company private.  Brookfield confirmed Mond ...