Columbia Threadneedle Investments Announces Investment Partnership with Long Run Partners

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BOSTON--(BUSINESS WIRE)--Oct 15, 2025--

Columbia Threadneedle Investments and Long Run Partners (“Long Run”) today announced a partnership to invest in and programmatically securitize up to $1.5 billion of high-quality non-agency mortgage loans that Long Run will source. The collaboration will combine Long Run’s expertise as a leading non-agency mortgage platform with Columbia Threadneedle’s deep credit research capabilities.

“By aggregating and securitizing residential mortgages, our team expects to unlock considerable access to attractive investment profiles that will generate higher yields than comparable, publicly available securities,” said Ryan Osborn, Co-Head of Structured Assets at Columbia Threadneedle. “This partnership allows us to apply our research-driven insights as we pursue attractive risk-adjusted returns for our clients.”

Portfolios managed by Columbia Threadneedle will provide 90% of the partnership’s capital, with Long Run Partners providing the remaining 10%, as well as administrative services. The collaboration will benefit from the collective experience and successful track records both firms have building and investing in large-scale non-agency investment and securitization platforms.

Columbia Threadneedle manages $68.8 billion in structured assets 1 with a highly experienced team of investment professionals and a proven track record of delivering strong risk-adjusted returns. The team’s credit research capabilities and deep experience in residential mortgages complement Long Run’s expertise in sourcing, aggregating and securitizing mortgage loans.

“We’re thrilled to launch this partnership with the exceptional team at Columbia Threadneedle as our growth continues to accelerate,” said John Fleisher, Co-Founder and CEO of Long Run Partners. “This initiative not only enables us to source high-quality loans for the partnership with Columbia Threadneedle, but also strengthens our value proposition to originator clients,” added Reid Ellison, Co-Founder and President of Long Run Partners.

Founded in 2021, Long Run Partners is an established non-agency platform. Over the last year, the firm has acquired approximately $4.5 billion of high-quality non-agency mortgages from a network of approved originator partners.

About Columbia Threadneedle Investments

Columbia Threadneedle Investments is a leading global asset manager that provides a broad range of investment strategies and solutions for individual, institutional and corporate clients around the world. With more than 2,300 people, including over 550 investment professionals based in North America, Europe and Asia, we manage and advise $690 billion of assets across developed and emerging market equities, fixed income, asset allocation solutions and alternatives. 2

Columbia Threadneedle Investments is the global asset management group of Ameriprise Financial, Inc. (NYSE: AMP). For more information, please visit columbiathreadneedleus.com.

Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

1 As of June 30, 2025

2 As of June 30, 2025, assets under management and advisement

About Long Run Partners

Long Run Partners (“LRP”) is a technology-focused non-agency platform based in New York City. Founded in 2021, the company sources non-agency whole loans and provides related services to a select group of institutional capital partners. LRP’s sourcing platform specializes in acquiring high-quality, creditworthy loans from a network of originator clients. The firm is backed by top capital partners, including two premier asset managers and a global investment bank.

Past performance is no guarantee of future results. Investing involves risk including the risk of loss of principal.

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CONTACT: Meghan Shields

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617.451.0739

KEYWORD: MASSACHUSETTS UNITED STATES NORTH AMERICA

INDUSTRY KEYWORD: ACCOUNTING ASSET MANAGEMENT PROFESSIONAL SERVICES FINANCE

SOURCE: Columbia Threadneedle Investments

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PUB: 10/15/2025 02:00 PM/DISC: 10/15/2025 01:58 PM

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