Natixis Investment Managers and Loomis, Sayles & Company have launched two active fixed-income exchange-traded funds, adding core-plus bond products to a U.S. ETF market where asset managers are competing to convert established portfolio-management capabilities into exchange-traded formats.

The new funds are the Natixis Loomis Sayles Total Return Bond ETF, listed on NYSE Arca under the ticker LSTB, and the Natixis Loomis Sayles Dynamic Core Plus ETF, listed under LSCP. The launch gives Natixis and its Loomis Sayles affiliate two actively managed bond ETFs intended for investors seeking core or core-plus fixed-income exposure rather than narrow-duration, single-sector or index-tracking allocations.

The products extend Loomis Sayles’ active bond franchise into an ETF wrapper at a time when advisors are using exchange-traded funds not only as low-cost beta vehicles but also as delivery mechanisms for discretionary credit, duration and sector allocation strategies. Natixis said the two ETF strategies are aligned with flagship Loomis Sayles mutual fund offerings that together represent roughly $25 billion in combined assets, making the launch less a new strategy experiment than a wrapper expansion around existing fixed-income disciplines.

LSTB is positioned as the more opportunistic of the two products. Natixis describes the Natixis Loomis Sayles Total Return Bond ETF as a core-plus allocation with greater flexibility across fixed-income sectors. The fund is managed by Loomis Sayles’ Full Discretion Team, a credit-oriented group led by Matt Eagan, CFA, alongside portfolio managers Brian Kennedy, Bryan Hazelton, CFA, and Scott Darci, CFA. The team has been associated with a high-conviction approach to security selection across global fixed-income markets, with an emphasis on fundamental research and relative value across sectors.

LSCP is designed with a more benchmark-aware orientation. The Natixis Loomis Sayles Dynamic Core Plus ETF seeks to balance income and safety while using dynamic sector allocation informed by macroeconomic conditions. Natixis said the fund may serve as a stand-alone fixed-income allocation or as a complement to riskier assets. The product is managed by Loomis Sayles’ Relative Return Team, with Richard Raczkowski, Michael Gladchun and Devon McKenna, CFA, named as portfolio managers.

The two funds are expected to fall within the Morningstar Intermediate Core-Plus Bond category, a segment widely used by advisors and allocation models for diversified bond exposure. Core-plus strategies typically start from investment-grade bond market exposure but allow managers to move beyond the benchmark into sectors such as high yield, securitized credit, non-U.S. debt or emerging-market securities, depending on the mandate. That flexibility is central to the pitch for active management in fixed income, where index weights can be shaped by issuer debt outstanding rather than by a manager’s view of credit quality or expected return.

Regulatory filings show meaningful differences between the two mandates. LSCP seeks high total investment return through current income and capital appreciation and aims to outperform the Bloomberg U.S. Aggregate Bond Index. The strategy generally seeks to maintain effective duration within 1.5 years of that benchmark, while allowing up to 15% of assets in below-investment-grade securities and up to 30% in foreign securities, including emerging markets. The fund may also hold U.S. and non-U.S. corporate and government debt, agency securities, commercial mortgage-backed securities, asset-backed securities and inflation-linked securities.

LSTB has a broader total-return objective and, under normal circumstances, invests at least 80% of net assets in fixed-income securities. Its prospectus allows up to 25% of assets in below-investment-grade fixed-income securities and up to 35% in U.S. dollar-denominated foreign securities, including emerging-market securities. The fund may invest across maturities and can use a wide range of instruments, including corporate securities, U.S. government securities, commercial paper, bank loans, mortgage-backed securities, collateralized loan obligations, convertible securities, private placements, structured notes, futures, forward contracts, options and swaps.

Those differences make the launch a two-track entry into the active bond ETF market. LSCP appears built for investors who want a core-plus strategy that remains more visibly tied to the broad investment-grade bond benchmark. LSTB gives the manager more scope to pursue issuer-specific and spread-driven opportunities, including credit stories that may be less dependent on broad interest-rate moves. Both products carry the risks common to active fixed-income ETFs, including interest-rate risk, credit risk, liquidity risk, below-investment-grade exposure, derivatives risk, secondary-market trading risk and the possibility that ETF shares may trade at a premium or discount to net asset value.

The launch also underscores how major asset managers are treating ETFs as a distribution channel for established active strategies rather than as a separate product category. Natixis’ U.S. ETF lineup already includes active products from several affiliated managers, and the addition of LSTB and LSCP gives the platform deeper coverage in fixed income. The firm listed both new funds with total net assets of $51.25 million as of June 23, 2026, while its ETF page described LSCP as a benchmark-aware fixed-income ETF combining traditional government and investment-grade credit sectors with out-of-benchmark sectors, and LSTB as an opportunistic, fundamentally driven fixed-income ETF run with a flexible, benchmark-agnostic approach.

For Loomis Sayles, the ETF launch is a vehicle extension of a business that remains substantially institutional and mutual-fund oriented. The Boston-based manager, founded in 1926, reported $417.9 billion in assets under management as of March 31, 2026. Natixis described the Full Discretion Team behind LSTB as managing $85.8 billion and the Relative Return Team behind LSCP as managing $139.3 billion as of the same date. That scale gives the funds an established research platform, though ETF performance will depend on execution in the specific portfolios, secondary-market liquidity and investor adoption.

The timing is favorable for issuers with recognizable active fixed-income franchises. Active ETFs globally held a record $2.49 trillion in assets at the end of May, according to ETFGI, which reported year-to-date net inflows of $411.75 billion for actively managed ETFs and $100.08 billion of net inflows during May alone. That backdrop has encouraged managers to launch active products across equities, options-based income, multi-asset strategies and fixed income, but bond ETFs are a particularly competitive area because investors are reassessing cash, duration and credit exposure as monetary policy expectations evolve.

Fixed income has been a natural category for active ETF expansion because the underlying bond market is fragmented, less transparent than large-cap equities and often more dependent on security selection, issue structure and trading liquidity. Index-tracking bond funds can provide broad exposure efficiently, but they may also leave investors exposed to market-cap-weighted bond issuance patterns. Active managers argue that they can add value through sector rotation, curve positioning, credit analysis, security selection and risk budgeting across corporate bonds, structured credit, government debt and non-U.S. markets.

Natixis and Loomis Sayles are also leaning into advisor demand for fund structures that can be traded intraday and used in model portfolios, tax-sensitive accounts and allocation changes without the operational features of traditional mutual funds. ETFs can offer transparency and exchange liquidity, though those attributes do not eliminate portfolio-level risk. The prospectus for the funds notes that shares are bought and sold in the secondary market and may trade at prices above or below NAV, particularly during periods of market stress, creation-and-redemption disruption or thin trading volume.

The core-plus label is likely to be central to how the products are marketed. Investors have moved through a period in which cash and short-duration instruments offered competitive yields, but many portfolio managers have argued that intermediate bond exposure can regain importance when investors anticipate rate cuts, changing inflation dynamics or a need for diversification against equity risk. A core-plus ETF gives advisors a single instrument for a diversified bond sleeve while allowing the manager to add risk where spreads, fundamentals and valuations appear attractive.

Still, the category requires clear investor communication. A core-plus strategy can look conservative relative to high-yield or emerging-market debt funds, but it is not the same as a plain-vanilla aggregate bond index ETF. Exposure to lower-rated credit, non-U.S. securities, derivatives, securitized assets and private or less liquid instruments may introduce return opportunities as well as drawdown and liquidity risks. The distinction between LSCP’s benchmark-aware posture and LSTB’s more opportunistic mandate will matter for advisors deciding whether either fund belongs in a core allocation, a satellite income sleeve or a tactical fixed-income position.

The launches also add to competition among large fixed-income managers using ETFs to defend or expand distribution relationships. Asset managers with legacy mutual fund franchises are under pressure to meet advisors where new assets are flowing, while ETF-native competitors continue to challenge traditional firms on cost, liquidity and product design. Natixis’ multi-affiliate structure gives it a way to bring different investment teams to market under a common distribution platform, and the Loomis Sayles products strengthen that lineup in a category where manager credibility remains important.

From a market-structure standpoint, the success of LSTB and LSCP will depend on more than portfolio design. New ETFs must develop trading volume, tight bid-ask spreads, market-maker support and platform availability. The fact that the funds are listed on NYSE Arca and distributed through brokerage platforms and financial intermediaries gives them access to established ETF infrastructure, but asset gathering in active fixed income is increasingly competitive. Investors will watch expense disclosures, early portfolio holdings, spreads, premium-and-discount behavior and how the funds position around interest-rate and credit-cycle changes.

The article’s central business signal is that Natixis and Loomis Sayles are formalizing an ETF route for two active fixed-income styles at a point when active ETFs are no longer a niche wrapper. The launch puts a century-old bond manager into a product format increasingly used by advisors for core allocations, not just tactical trades. If the funds attract assets, they could reinforce the migration of traditional active bond strategies into ETFs and add pressure on other fixed-income managers to make flagship approaches available in exchange-traded form.