Utilize the input text as a context reference, choose the right relationship between 'Fannie Mae' and 'Timothy Mayopoulos' from the options.
Options: distribution format, creator, employer, chief executive officer

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.
chief executive officer