Lone Star Funds Closes $1B+ Mortgage Investment Fund

Lone Star Funds has successfully concluded fundraising for its latest dedicated residential mortgage vehicle, Lone Star Residential Mortgage Fund IV, L.P. (LSRMF IV). The fund secured commitments exceeding $1 billion, positioning it to deploy capital into mortgage loans valued at over $10 billion. This significant capital raise underscores the growing demand for private investment in a crucial segment of the U.S. housing finance market.

LSRMF IV is strategically focused on acquiring newly originated, performing U.S. non-agency residential mortgage loans. This asset class typically serves borrowers, such as self-employed individuals and small business owners, who may not fit the stringent criteria of government-backed agency mortgages, despite often possessing robust creditworthiness. Lone Star's deep expertise in origination, financing, and investment is expected to drive the fund's programmatic deployment of capital.

The fund's initial close occurred in March 2025, and since then, it has already allocated approximately 33% of its committed capital. This rapid deployment signals strong conviction in the market opportunity and the effectiveness of Lone Star's investment strategy. The firm's long-standing commitment to the U.S. housing market, spanning over a decade, has seen it inject capital into mortgages outside traditional agency lending rules.

Donald Quintin, Chief Executive Officer of Lone Star, highlighted the clear necessity for private capital in this underserved borrower segment. "We believe the tailwinds for this market will continue to drive growth opportunity for the platform," Quintin stated, expressing gratitude for investor confidence. Lone Star has a proven track record, having previously organized its Residential Mortgage Fund series starting in 2014. Cumulatively, Lone Star Funds have acquired more than $20 billion in unpaid principal balance of newly originated mortgage loans, encompassing over 40,000 individual mortgages nationwide.

A key element of Lone Star's success in this space has been its proprietary securitization platform, COLT. This platform has facilitated numerous innovations in the securitization market, including the first post-financial crisis securitizations of newly originated non-agency loans and the first such securitization to achieve a AAA rating. To date, Lone Star has executed 68 COLT securitizations, attracting participation from over 200 distinct bond investors, demonstrating broad market acceptance and confidence in their structured finance capabilities.

The success of LSRMF IV comes at a time when the non-agency mortgage market is experiencing renewed interest. Factors such as evolving borrower demographics and a desire for more tailored lending solutions are creating fertile ground for specialized investors. Lone Star's ability to navigate complex credit situations and its established infrastructure for both origination and securitization position it favorably to capitalize on these trends.

This latest fundraise by Lone Star Funds not only bolsters their capacity to invest in non-agency residential mortgages but also reinforces their position as a significant player in the alternative credit landscape. The firm's extensive experience, dating back to its first fund in 1995 and encompassing 26 funds with approximately $96 billion in aggregate commitments, provides a strong foundation for continued success in identifying and executing value-oriented investments across global markets.