Private Markets in 401(k) Plans: Participant Need or Distribution Opportunity?

Timothy R. Yee | August 27, 2026

I was reading the latest from Nuveen on private equity and private credit and the efforts to integrate that into the 401(k) space. The five articles Nuveen produced show that it would appear that private-market investments are moving closer to a 401(k) plan near you. (Insert ominous music here?) :-)

Private equity, private credit, real estate and infrastructure have traditionally been used by pension funds, endowments and wealthy investors. Asset managers are now developing ways to place them inside target-date funds and managed accounts used by everyday retirement savers.

This deserves a serious discussion. It does not deserve an automatic yes or an automatic no. I also was curious why Nuveen was bringing this matter up, and so I put on my research hat to learn more.

Why the argument has appeal

Publicly traded stocks and bonds do not represent the entire economy. Many companies remain private for longer, while infrastructure, farmland and directly owned real estate are largely absent from conventional retirement portfolios.

Private investments could therefore broaden diversification, provide different sources of income and reduce dependence on a relatively concentrated public stock market. Because retirement savings are generally invested for decades, advocates also argue that a professionally managed portfolio can tolerate some investments that cannot be sold immediately.

Those are legitimate arguments. They explain why Nuveen and other large investment managers believe private markets can contribute to retirement outcomes.

Nuveen also brings considerable experience to the discussion. The company reports $315 billion in alternative investments, including $25.4 billion in private-market assets within U.S. defined contribution plans. It has included direct real estate in its target-date series since 2017.

That experience gives Nuveen an informed perspective. It also makes the company’s recent publications worth reading carefully, including what they say about both the possibilities and the unfinished work.

Three different questions

The discussion often combines three questions that should be considered separately.

First, can private investments provide portfolio benefits?

Yes. Depending on the investment, manager and price, they may offer diversification, income or additional return.

Second, can private investments be made to function inside a participant-directed retirement plan?

Perhaps. Target-date funds and other professionally managed portfolios can combine a limited private allocation with publicly traded investments. The liquid portion can accommodate ordinary participant transactions while the manager oversees the complete portfolio.

Third, has the industry demonstrated that participants will receive better results after fees, valuation adjustments and liquidity costs?

The evidence is not yet sufficient to answer yes.

A yes to the first question, followed by a possible yes to the second, does not answer the third.

Nuveen acknowledges the unfinished work

Nuveen recently published several pieces supporting the inclusion of private markets in defined contribution plans. One of them, Private Assets in 401(k)s: Navigating the Promise and the Pitfalls, deserves particular attention because it addresses the practical challenges directly.

The article acknowledges that private-market products were originally designed for institutions and wealthy investors whose needs differ from those of 401(k) participants. A participant-directed plan generally requires daily transactions, regular account values, reasonable liquidity and understandable fees.

The article describes the present product market as still being in an “incubation phase.” It also identifies several unresolved issues:

Private assets do not ordinarily trade every day, which makes daily valuation difficult.
Participants can move money, take distributions or leave a plan, even when the underlying investments cannot readily be sold.
Private-market fees can be more complicated than the expense ratio of a conventional mutual fund.
Recordkeepers do not yet support these products consistently.
Many investment committees and advisors lack experience evaluating private-market managers.
Products may need several years of actual results before committees can evaluate how they perform within a 401(k) structure.

Nuveen deserves credit for putting those concerns into the discussion. Plan committees should take them just as seriously as the potential benefits.

Daily valuation does not create a daily market

New investment structures may be able to provide daily account values and enough liquidity for ordinary retirement-plan transactions. That could resolve part of the operational challenge, but it does not change the characteristics of the underlying investments.

A daily stated value is not necessarily a daily market price. If an asset has not recently traded, its value may depend on financial models, estimates and information that becomes available only periodically.

Similarly, placing an illiquid investment inside a portfolio containing liquid assets does not make the underlying investment liquid. It means the portfolio is designed so that its liquid holdings can ordinarily accommodate participant transactions.

Neither approach is automatically unsound. Both may be reasonable parts of a carefully constructed portfolio. Committees should nevertheless understand the difference between managing a limitation and eliminating it.

Participant need or distribution opportunity?

Like any investment manager developing new products, Nuveen has a commercial interest in their adoption. It manages private-credit, private-equity, real estate and real-asset strategies, as well as target-date funds and other retirement products capable of including them.

That commercial interest does not invalidate Nuveen’s research or its investment case. Product development and investment innovation normally come from firms that expect to benefit when their ideas succeed.

The plan committee’s responsibility is different. It must determine whether a proposed investment addresses a participant need and whether the available evidence supports its use.

What specific problem is the committee trying to solve?

Is it concentration in public stocks? Insufficient diversification? Inflation exposure? Retirement income? Expected returns?

Once the need is identified, the committee can compare a private-market allocation with the available public-market alternatives. That comparison should consider potential benefits, total costs, liquidity, valuation practices, manager selection and the strength of the supporting evidence.

Without a clearly defined participant need, access to private markets can quietly become the objective rather than a means of improving retirement outcomes.

What evidence should committees require?

Before approving a target-date fund or managed portfolio containing private investments, I would want clear answers to several questions:

What participant need is this allocation intended to address?
What is the complete cost, including the expenses of the underlying private investments?
How are assets valued when there has been no recent transaction?
Who benefits or bears the cost when participants enter or leave between formal valuations?
How much liquidity is maintained, and what happens during sustained withdrawals or market stress?
Does the manager use affiliated investments, and how are those relationships disclosed and monitored?
What independently verifiable evidence shows improved participant outcomes after all costs?
What other approaches were considered?

These questions do not presume that private markets are unsuitable. They apply the same standard that should govern every retirement-plan investment: explain the need, understand the risks and costs, compare the alternatives and document why participants are likely to be better served.

The Parting Glass

Private markets may eventually earn a place in professionally managed 401(k) portfolios. Nuveen’s experience, product development and willingness to discuss the difficulties may help move that work forward.

This is not an argument against private markets. It is an argument for continuing the prudent, defendable and repeatable process that should govern every retirement-plan investment decision.

The fiduciary duties do not change because the investment is new or complex. Committees must act solely in the interest of participants, identify the need they are trying to address, understand the risks and total costs, compare reasonable alternatives and document why their decision is expected to benefit participants.

The industry has made progress in determining how private investments could be packaged for retirement plans. The next step is demonstrating when and why they should be used.

Private markets do not require a new fiduciary philosophy. They require faithful application of the one ERISA already provides.