Our Mission

Who is CSS?

CSS is a FinTech – leveraging industry leading people, technology and processes to support the Uniform Mortgage-Backed Security (UMBS). CSS is a joint-venture of Fannie Mae and Freddie Mac and was formed to design, build and launch the Common Securitization Platform (CSP).

The CSP plays a critical role in the U.S. housing market, facilitating the transition of residential mortgages into mortgage-backed securities which are sold to investors to generate liquidity to support new mortgages for new homeowners. We put people in homes every day.

CSS today administers a portfolio of $5 trillion worth of mortgage-backed securities (MBS), representing 27 million loans and supports issuance of over $200 billion in mortgage securities each month.

Common Securitization Platform (CSP)
Today, CSS maintains the largest and most advanced mortgage security service in the world

Today, CSS maintains the largest and most advanced mortgage security service in the world

The CSP functions as a flexible and scalable technological and operational platform to support Fannie Mae and Freddie Mac securitization while also supporting unique business process flows for both enterprises. Our services support Originator/Servicer/Issuer businesses in the monetization of their loan production, returning vital liquidity and funding for our customers to use in funding new mortgages for American families across the United States.

From the start, our business has been architected and constructed with the ability to evolve our services to other segments of the securitization market. Our focus is on creating indispensable partnerships with customers and growing value for the global financial markets.

We partner with organizations to reimagine the way they do business

We partner with organizations to reimagine the way they do business

We are continuing to evolve our core business and technology capabilities to create new value for current and future customers.

We partner with organizations to reimagine the way they do business

CSS is focused on creating value for our clients

We are known for our leadership in working collaboratively with clients to create and deliver innovative business and technology solutions that transform the way they do business and delights their customers with industry leading services.

We have demonstrated this profound value creation for Fannie Mae and Freddie Mac and are a trusted and critical partner in their businesses.

CSS Video Library

How the CSP Works