What is the relationship between Fannie Mae and Timothy Mayopoulos in the context of the input sentence. Choose an answer from: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.

In forms filed with the Securities and Exchange Commission, the companies disclosed that Fannie Mae CEO Timothy Mayopoulos and Freddie Mac CEO Donald Layton will get annual base salaries of $US750,000 each, $US2.1 million in fixed deferred compensation and $US1.2 million in at-risk deferred salary.

Answer: chief_executive_officer