Ally Financial’s decision to sell its Canadian auto finance operations to the Royal Bank of Canada for $4.1 billion, and The Toronto-Dominion Bank’s $5.9 billion purchase of Target’s credit card portfolio has yielded roles for a quartet of top Am Law 100 firms.

Sullivan & Cromwell M&A partner Andrew Gerlach and corporate partner Jay Clayton are leading a team from the firm advising Detroit-based Ally, the former lending arm of General Motors known as GMAC until 2010.