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Ignites: Putnam TDFs Swap Sustainable Investing for Private Assets

December 24, 2025

Sabrina Kharrazi reports on Putnam Investments’ decision to revamp its $2.8 billion Sustainable Retirement target-date fund series by adding exposure to private markets through interval funds, marking a notable shift among large asset managers. The firm will rebrand the series as the Putnam Retirement Advantage Plus lineup effective Feb. 27, filings show, dropping its sustainability mandate, revising the underlying fund mix and incorporating private real estate and private credit allocations. Putnam is among the first major managers to embed private markets exposure directly into target-date mutual funds rather than relying on collective investment trusts.

XA Investments President Kimberly Flynn said the move places Putnam ahead of many peers. “Putnam is ahead of many target-date competitors by moving to include private markets exposure through interval funds,” she said. Flynn noted that while some collective investment trusts have long invested directly in private credit and real estate, such exposure has been far less common in daily-valued target-date mutual funds, where liquidity, valuation and fiduciary oversight concerns are more pronounced for plan sponsors and recordkeepers.

Under the revised strategy, the Retirement Advantage Plus will allocate partial funds to the Clarion Partners Real Estate Income Fund and the Franklin BSP Lending Fund, according to the filings. Allocations to private credit and real estate will begin at about 2% and gradually rise to roughly 8% as the funds approach their target dates, a structure intended to help mitigate liquidity risk. Still, embedding interval funds inside daily-valued mutual funds introduces additional liquidity-management challenges, analysts said, requiring careful monitoring of flows to avoid overexposure to illiquid assets.

The Sustainable Retirement series was formed in 2023 and has seen steady asset growth since its launch. The revamp underscores the broader push by asset managers to expand access to private markets within mainstream retirement products, as firms look to balance diversification benefits with the operational and liquidity constraints of daily-valued funds.

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