Key insight: An unnamed bank tried to buy Comerica in September, weeks before the bank's board decided that Fifth Third would be the ideal acquirer, according to a new regulatory filing.What's at stake: At nearly $11 billion, the Fifth Third-Comerica deal is the largest of 2025.Forward look: Comerica CEO Curtis Farmer will receive$8.75 million per year as Fifth Third's vice chair, after which he will maintain the same compensation in his role as senior advisor.Once Comerica decided to sell itself to anothe ...