Freddie Mac was seeking a claim over USD 1.2 billion in loans that it made to Lehman before its collapse.
Lehman's bankruptcy in 2008 was the biggest in US history and helped set off the financial crisis.
As part of the agreement announced today, Freddie Mac will hand over loan information that allows Lehman to pursue claims against mortgage originators for alleged misrepresentation. The deal is similar to one struck recently between Lehman and another mortgage finance giant, Fannie Mae.