Ostrum Asset Management
Ostrum Asset Management is a French institutional asset manager within Natixis Investment Managers and the BPCE banking group.
Last updated August 24, 2026
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Overview
Ostrum Asset Management is a French asset-management company serving institutional investors, individuals and distribution partners. The business is part of Natixis Investment Managers, the multi-affiliate investment-management organization associated with Groupe BPCE, and is majority owned through that group. Its principal activities cover the management of fixed-income, insurance-related and liability-aware portfolios, as well as selected real-asset and private-debt strategies. The company’s corporate history combines several generations of French financial institutions. Its earlier lineage includes Nord Sud Développement, created in 1985 as one of the early solidarity-oriented investment funds. The business was subsequently associated with CDC Asset Management, CDC IXIS Asset Management and IXIS Asset Management before becoming part of the broader Natixis organization. Natixis was established in 2006 through the combination and alignment of activities from Groupe Caisse d’Epargne and Groupe Banque Populaire. The asset-management business was formally known as Natixis Asset Management from 2007 until its rebranding as Ostrum Asset Management in 2018. Before the rebrand, the company expanded its product range through initiatives including the Natixis Global Risk Parity Fund in 2013, the Natixis Short Term Global High Income Fund in 2014, and real-assets private-debt management in 2016 across real estate, infrastructure and aircraft-related financing. The 2018 change also extended to certain international operations, including entities in the United States and Asia. The Ostrum name was intended to provide a distinct identity within Natixis Investment Managers while preserving the company’s role as a specialist investment affiliate. Ostrum operates internationally, with activities in Europe, the United States and Asia. Its Asian platform manages Asian assets, while the wider organization provides investment solutions to institutions, private clients and distributors. As of June 30, 2024, the company reported or was described as managing approximately €396 billion in assets and employing more than 700 people. Those figures place it among the larger specialist asset managers associated with the BPCE and Natixis investment-management ecosystem. The company has also been affected by regulatory scrutiny. In July 2017, while it was still operating under the Natixis Asset Management name, the French financial regulator’s enforcement committee imposed a €35 million penalty concerning charges applied to formula funds. This remains an important event in the company’s pre-Ostrum history and illustrates the governance and conduct risks associated with complex investment products. In January 2025, BPCE and Generali announced a non-binding memorandum of understanding to explore a 50-50 asset-management joint venture combining the two groups’ investment-management activities. The proposed structure would have included BPCE-affiliated firms such as Natixis Investment Managers and, by extension, Ostrum Asset Management, with approximately €1.9 trillion in combined assets under management. The negotiations were terminated by BPCE and Generali on December 11, 2025, according to the cited reference material. Ostrum therefore remains identified with the Natixis Investment Managers and BPCE structure rather than becoming part of that proposed joint venture.
History
Ostrum Asset Management’s roots extend to 1985, when Nord Sud Développement was created as an early solidarity-oriented investment fund. The business later passed through several French financial-management identities, including Natixis Impact Nord Sud Développement, CDC Asset Management, CDC IXIS Asset Management and IXIS Asset Management. In 2006, the creation of Natixis brought together activities associated with Groupe Caisse d’Epargne and Groupe Banque Populaire, providing the organizational setting for the subsequent asset-management platform. The company operated as Natixis Asset Management from 2007. During this period it broadened its investment capabilities and product range. In 2013 it introduced the Natixis Global Risk Parity Fund, a global-allocation product designed around balancing portfolio risk rather than simply allocating capital among asset classes. In 2014 it launched the Natixis Short Term Global High Income Fund. In 2016 it developed real-assets private-debt management in real estate, infrastructure and aircraft-related sectors. The Natixis Asset Management period also included a significant regulatory event. On July 25, 2017, the enforcement committee of France’s Autorité des Marchés Financiers fined the company €35 million over the charging structure used for formula funds. The penalty became part of the company’s corporate history before its rebranding. In 2018, Natixis Asset Management became Ostrum Asset Management. The rebranding was also applied to related operations in the United States and Asia, including Natixis Asset Management Asia, which became Ostrum Asset Management Asia Limited. The new identity positioned the business as a distinct specialist affiliate within Natixis Investment Managers, itself associated with and majority owned through Groupe BPCE. Ostrum’s business spans Europe, the United States and Asia. Its services are directed at institutional investors, individuals and distributors, with particular emphasis on fixed income, insurance investment solutions, liability-aware mandates and selected private-debt strategies involving real assets. As of June 30, 2024, the company was described as managing €396 billion in assets and employing more than 700 people. In 2025, BPCE and Generali explored a major combination of their asset-management activities. Their January 21 memorandum of understanding contemplated a 50-50 joint venture that would have included BPCE’s affiliated asset managers, including Natixis Investment Managers and Ostrum, and would have had roughly €1.9 trillion in assets under management. On December 11, 2025, the two groups announced that they had ended the negotiations. Ostrum consequently remained associated with the existing Natixis Investment Managers and BPCE structure.
- 2025
Proposed BPCE–Generali asset-management joint venture
[1]BPCE and Generali announce a non-binding plan for a 50-50 combination of their asset-management operations.
- 2025
Joint-venture negotiations terminated
[1]BPCE and Generali announce that negotiations for the proposed asset-management joint venture have ended.
- 2024
Reported assets and workforce
[1]As of June 30, Ostrum is described as managing €396 billion in assets and employing more than 700 people.
- 2018
Ostrum brand introduced
[1]Natixis Asset Management changes its name to Ostrum Asset Management, with related United States and Asian entities also adopting the Ostrum identity.
- 2017
AMF enforcement action
[1]France’s financial-markets regulator fines Natixis Asset Management €35 million concerning charges on formula funds.
- 2016
Real-assets private debt expands
[1]The company develops real-assets private-debt management across real estate, infrastructure and aircraft sectors.
- 2014
Short-term global high-income fund launched
[1]The company launches the Natixis Short Term Global High Income Fund.
- 2013
Global risk-parity fund launched
[1]Natixis Asset Management launches the Natixis Global Risk Parity Fund, a global allocation product using a balanced-risk approach.
- 2007
Natixis Asset Management is established
[1]The company begins operating under the Natixis Asset Management name.
- 2006
Natixis is created
[1]Groupe Caisse d’Epargne and Groupe Banque Populaire align activities to create Natixis, establishing the broader group context for the asset-management business.
Products and positioning
A specialist, institutionally oriented asset manager focused on fixed income, insurance-related investment solutions, liability-aware portfolio construction and selected real-asset private debt strategies within the Natixis Investment Managers platform.
Global allocation fund · 2013
Natixis Global Risk Parity Fund
Launched in 2013 under the Natixis Asset Management name, this fund used a global-allocation framework centered on balancing risk across investments rather than relying solely on conventional capital weights. It represents the company’s historical expansion beyond traditional single-sector mandates into diversified portfolio-construction solutions.
Short-term income fund · 2014
Natixis Short Term Global High Income Fund
Introduced in 2014, this product targeted global high-income opportunities while maintaining a short-term investment orientation. It illustrates the company’s focus during the Natixis period on income-generating strategies and diversified fixed-income solutions.
Private debt · 2016
Real Assets Private Debt
Developed in 2016, the real-assets private-debt platform covered financing opportunities linked to real estate, infrastructure and aircraft. The strategy broadened the firm’s capabilities into less liquid, asset-backed credit markets serving institutional investment needs.
Institutional asset management
Institutional fixed-income and insurance solutions
Ostrum’s broader offering includes institutional fixed-income management and portfolio solutions for insurance-related investors. These mandates are associated with liability-aware investing, long-term portfolio construction and the needs of large professional asset owners.
Controversies
2017
AMF penalty concerning formula-fund charges
While operating as Natixis Asset Management, the company was fined €35 million by the enforcement committee of France’s Autorité des Marchés Financiers on July 25, 2017. The action concerned charges applied to formula funds and predates the Ostrum rebrand.
Brand decisions
2025
Proposed BPCE–Generali asset-management combinationM&ABackground
BPCE and Generali sought to combine their asset-management activities into a large jointly owned platform.
Action taken
The groups signed a non-binding memorandum of understanding for a 50-50 joint venture that would have included Natixis Investment Managers and Ostrum Asset Management.
Aftermath
The negotiations were terminated on December 11, 2025, and Ostrum remained associated with the existing Natixis Investment Managers and BPCE structure.
Proposed combined assets under management. Approximately €1.9 trillion proposed (2025 proposal)
2018
Rebranding from Natixis Asset Management to Ostrum Asset ManagementStrategyBackground
Natixis Investment Managers reorganized the identity of its asset-management affiliates and sought a distinct brand for the business.
Action taken
Natixis Asset Management adopted the Ostrum Asset Management name. Related United States and Asian operations also changed their names to Ostrum-branded entities.
Aftermath
The company continued operating as a specialist affiliate of Natixis Investment Managers within the BPCE group.
Recent events
- 2025
BPCE and Generali announce proposed asset-management joint venture[1]
M&A
BPCE and Generali announced a non-binding memorandum of understanding for a proposed 50-50 joint venture combining their asset-management activities. The proposed business would have included Natixis Investment Managers and its affiliates, including Ostrum Asset Management, and would have represented about €1.9 trillion in assets under management.
- 2025
BPCE and Generali terminate proposed asset-management joint venture negotiations[1]
M&A
BPCE and Generali announced the end of negotiations concerning the planned joint venture between their asset-management operations. The termination left Ostrum within the Natixis Investment Managers and BPCE organization.
- 2018
Natixis Asset Management rebrands as Ostrum Asset Management[1]
Other
Natixis Asset Management changed its corporate brand to Ostrum Asset Management. Related United States and Asian operations also adopted Ostrum branding during the reorganization.
Sources1 sources
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