The $49 Trillion Opportunity: Retirement Assets & Private Capital Markets
WHITE PAPER
The $49 Trillion Opportunity:
How Retirement Assets Are Reshaping the Private Capital Markets Landscape
May 2026 | Rialto Markets
EXECUTIVE SUMMARY
U.S. retirement assets have reached $49.1 trillion — representing 34% of all household financial assets. Yet despite this concentration of wealth, private capital markets remain virtually inaccessible to most retirement savers. Retail investors allocate just ~8% of portfolios to alternatives, versus 15–25% for institutions. With explicit regulatory momentum building from the DOL, SEC, and a 2025 Executive Order, and a projected $3.7 trillion in retail private AUM by 2029, the retirement channel represents a significant untapped distribution opportunity in private markets today.
1. A Massive, Concentrated Pool of Capital
The United States has accumulated one of the largest and most concentrated pools of long-term savings capital in the world. As of year-end 2025, total U.S. retirement assets reached $49.1 trillion — a figure that accounts for approximately 34% of all U.S. household financial assets, according to the Investment Company Institute (ICI). This pool dwarfs the GDP of every nation except the United States itself.
Within this pool, the breakdown is equally striking:
$49.1T
Total U.S. Retirement Assets (Q4 2025)
Source: Investment Company Institute (ICI), 2025
$19.2T
Individual Retirement Accounts (IRAs) — the single largest segment
Source: ICI, Q4 2025
$14T+
Defined Contribution Plans (e.g., 401(k), 403(b))
Source: ICI, Q4 2025
34%
Share of all U.S. household financial assets held in retirement accounts
Source: ICI, Q4 2025
These figures underscore a fundamental reality: for the vast majority of American households, retirement accounts are not just a savings vehicle — they are the primary repository of generational wealth. Approximately two-thirds of U.S. households participate in some form of retirement plan, making this the single most scalable channel through which individuals could access private capital markets at scale.
“A substantial portion of American household wealth is locked inside tax-advantaged retirement vehicles, making these accounts the primary channel through which most individuals can access long-term investment strategies — including private markets.”
The long investment horizons inherent in retirement accounts — often 20–40 years — are structurally aligned with the illiquidity premiums that private market investments offer. This natural fit between the asset class and the vehicle has historically gone underutilized.
2. The Allocation Gap: A Structural Mismatch
Despite their wealth, retail investors — and the retirement accounts that hold the majority of that wealth — remain dramatically under-allocated to alternative assets compared to institutional peers. This is not an accident; it reflects historical barriers of access, regulation, and product availability. But it represents a notable allocation disparity in capital markets today.
Investor Type
% of Global Wealth
Alt Allocation
Access to Privates
Retail / Individual
~50%
~8%
Severely Limited
Institutional
~35%
~15–25%
Broad / Unrestricted
Top Endowments
~15%
~35–50%
Institutional / Direct
Sources: Bain & Company Global Private Equity Report 2023; WorldMetrics.org Alternative Asset Management Industry Statistics; Cambridge Associates Endowment Data.
The data tell a stark story: individual investors hold approximately 50% of global wealth, yet represent only 16% of alternative asset AUM globally (Bain & Company, 2023). The average retail portfolio allocates roughly 8% to alternatives, while institutional investors average 15–25%, and top university endowments allocate 35–50%.
This structural allocation gap is not driven by investor preference — it is driven by product access, regulatory constraints, and minimum investment thresholds that have historically excluded retail participants from private markets. Retirement accounts, with their scale and long-horizon alignment, are uniquely positioned to close this gap.
Why Does the Gap Matter?
Private markets — including private equity, private credit, real assets, and venture capital — have historically delivered return premiums over public markets in certain periods, although such investments involve different risks and liquidity characteristics. The Cambridge Associates Private Equity Index has outperformed the S&P 500 over certain historical periods, although such comparisons involve important differences in liquidity, valuation methodology, fees and risk. For retirement savers with long investment horizons, the exclusion from this asset class may represent a missed opportunity for some investors.
3. Retirement Accounts as the Gateway to Private Markets
For most Americans, there are only a handful of structural pathways to participate in private capital markets. Direct investment requires accredited investor status (net worth exceeding $1 million excluding primary residence, or income exceeding $200,000 annually) — a threshold that excludes the majority ofU.S. households. Institutional funds require minimum commitments of $1 million or more and are
unavailable to retail investors.
The three primary barriers preventing retail participation in private markets are:
- High Minimum Investments: Institutional private equity and credit funds typically require $1 million or more in minimum commitments, placing them beyond reach for individual investors.
- Accreditation Requirements: SEC regulations require participants in private placements to be accredited investors, limiting direct access to approximately 13% of U.S. households.
- Liquidity Mismatch: Traditional private market funds have multi-year lock-up periods and limited redemption windows that conflict with the liquidity needs of most individual investors outside of long-horizon retirement accounts.
Retirement accounts — particularly IRAs and 401(k)s — circumvent all three barriers in meaningful ways:
- Scale: Individual retirement savers can collectively access institutional-level allocation strategies through plan aggregation.
- Horizon Alignment: Retirement accounts’ 20–40 year time horizons are structurally aligned with private market lock-up periods.
- Vehicle Flexibility: IRAs in particular allow investment in a wide range of alternative assets, including real estate, private credit, and — increasingly — private equity and hedge fund structures.
For many Americans, the retirement account may be the most practical vehicle through which they can gain exposure to private markets.
This positions retirement platforms — custodians, recordkeepers, wealth management firms, and plan sponsors — as the critical distribution infrastructure for the next wave of private market growth.
The structural case for IRAs as a private market vehicle is already being realized in practice. Eric Satz, CEO of AltoIRA — a platform enabling IRA-based alternative investing — describes what that looks like on the ground:
“Angel investing is growing in scale and popularity as technology enables platforms to deliver these opportunities to a broader investor base. Data indicates that IRAs hold over $19 trillion in assets, but less than 3% is invested in alternatives like angel opportunities. Most investors still default to after-tax capital, either because they don’t know IRA investing in private companies is possible or because they assume it’s more complicated than it is. That’s changing, and Alto is making it easier to execute. On Alto’s platform, we see investors who understand the tax advantages building actual angel portfolios inside their IRAs, committing $1,000 or more across 10, 50, even 200+ private company investments within a single IRA. The IRA has become a vehicle for serial angel investing at scale. And when those bets pay off, the tax structure matters: tax-deferred growth in a Traditional IRA, or entirely tax-free gains in a Roth.” — Eric Satz, CEO of AltoIRA
4. Regulatory Tailwinds: From Caution to Enablement
Perhaps the most significant development in this space over the past five years has been the explicit shift in regulatory posture toward expanded consideration of private market access. Policymakers at the highest levels — from the Department of Labor and the SEC to the White House — have recognized the access disparity and taken concrete steps to address it.
Year
Regulator / Body
Action
Significance
2020
DOL
Field Assistance Bulletin on PE in 401(k)
First explicit permission for PE exposure in DC plans
2022
SEC
Private Offering Framework Reforms
Simplified access for registered advisers to private structures
2023
SECURE
Congress / DOL
Expanded plan flexibility and encouraged alternative options
2025
White House
Executive Order: Democratize Alt Access
Directed agencies to remove barriers to alt access in retirement
2025
SEC IAC
Recommendation on Retail Private Market Access
Urged SEC to update rules enabling retail access via registered funds
2026
DOL
Proposed Safe Harbor Rule for Alts in 401(k)
Proposed fiduciary protections for sponsors offering alt investment options
Sources: DOL.gov; U.S. Department of Labor EBSA (2026); White House Executive Order (2025); SEC Investor Advisory Committee Report (September 2025); WealthManagement.com; Patterson Belknap Webb & Tyler LLP.
The significance of this regulatory trajectory may be substantial. The 2020 DOL Field Assistance Bulletin was widely regarded as a landmark moment, opening the door for private equity exposure within 401(k) plan menus as part of diversified investment options. The 2025 Executive Order — which explicitly directed agencies to ‘democratize access to alternative assets’ — elevated this from regulatory guidance to explicit national economic policy.
The 2026 DOL proposed ‘safe harbor’ rule is particularly impactful: it proposes fiduciary protections for 401(k) plan sponsors who offer alternative investment options, directly addressing one of the largest remaining barriers to adoption — sponsor liability concern. If finalized, this rule could accelerate adoption dramatically across the plan sponsor ecosystem.
What This Means for Market Participants
For asset managers, wealth management firms, and plan sponsors, the regulatory timeline above represents a clear signal: the window to position products, infrastructure, and distribution for the retirement channel is open now. First-movers in this space may benefit from establishing relationships, scale, and brand recognition before the market reaches saturation.
5. The Actionable Market Size (TAM)
The convergence of a massive retirement asset base, a persistent allocation gap, and accelerating regulatory enablement creates what may be the largest untapped distribution opportunity in private capital markets history.
Segment
AUM (2025)
Projected AUM (2029)
Growth
Total U.S. Retirement AssetsTotal
$49.1 Trillion
~$55+ Trillion
~12%+
Retail Semi-Liquid / Private AUM
$1.9 Trillion
$3.7 Trillion
~95%
Incremental Opportunity (Privates)
——
$1.7 Trillion
New capital
Implied Untapped Retirement Pool
~$47 Trillion
——
~95% of total
Sources: ICI Q4 2025; Cerulli Associates U.S. Private Markets 2025 Report; Cerulli Press Release, 2025. Projections are estimates and not guarantees of future results.
Cerulli Associates — the leading research firm covering the wealth and retirement management industry — projects that retail private market assets (semi-liquid and private strategies) will grow from approximately $1.9 trillion today to $3.7 trillion by 2029. That represents approximately $1.7 trillion in incremental capital inflows over four years.
To put this in context: even if retirement accounts moved just 1% of their total AUM from traditional to private market strategies, that would represent approximately $490 billion in new capital. A 3% reallocation — still well below institutional norms — would represent nearly $1.5 trillion. The mathematics of even modest reallocation at scale are staggering.
~95% of the $49 trillion retirement pool remains completely untouched by private market strategies. The opportunity for growth could be substantial.
Near-Term Actionable Segments
While the full retirement asset pool is theoretically addressable, certain segments are more immediately actionable:
- Self-Directed IRAs (SDIRAs): Already designed to hold alternative assets; significant near-term opportunity for private credit, real estate, and PE fund structures.
The SDIRA Perspective
For investors who want greater control over how their retirement assets are invested, self-directed accounts can provide a broader range of investment choices. As Ian Robertson, Head of Sales at Madison Trust explains:
“A Self-Directed IRA unlocks investment opportunities that many investors never realize they can pursue with their retirement accounts.
The greatest benefit of a Self-Directed IRA isn’t simply access to alternative investments, it’s the freedom to more closely align your retirement strategy with your personal knowledge, experience, and convictions.”
— Ian Robertson, Madison Trust Company²
- 401(k) Mega-Plans: Large plan sponsors (500+ participants) are early adopters of alternative investment options and are most immediately impacted by the DOL safe harbor rule.
- Advisor-Guided Rollover IRAs: Wealth advisors serving clients with rollover IRAs from employer plans represent a key distribution channel for semi-liquid private fund structures.
- State and Municipal Plans: A growing number of state-level plans are exploring alternative allocations, following the lead of the largest public pension funds.
6. Key Considerations & Risk Disclosures
This analysis is intended to highlight a structural market opportunity. It is important to note that private market investments carry meaningful risks and are not appropriate for all investors or all retirement accounts.
- Illiquidity Risk: Private market investments typically have multi-year lock-up periods. Investors may not be able to access capital during this period, which may conflict with retirement distribution needs.
- Valuation Risk: Private assets are not marked to market daily. Valuations may be infrequent and subject to significant estimation uncertainty.
- Manager Selection Risk: Returns in private markets are highly dispersed across managers. Top-quartile and bottom-quartile returns can differ dramatically; manager selection is a critical determinant of outcomes.
- Regulatory Risk: The regulatory environment discussed in this paper is evolving rapidly. Proposed rules may not be finalized as described, and the regulatory landscape may change in ways that affect the investment opportunity.
- Concentration Risk: An over-allocation to private markets — even within a retirement account —may reduce portfolio diversification and increase risk.
This material is intended for financial professionals and sophisticated investors only. It does not constitute investment advice or a solicitation to purchase any security. Past performance is not indicative of future results.
Sources & References
- Investment Company Institute (ICI). “Retirement Assets Total $49.1 Trillion in Fourth Quarter 2025.” PR Newswire / ICI.org, Q4 2025.
- Bain & Company. “Why Private Equity is Targeting Individual Investors.” Global Private Equity Report, 2023.
- WorldMetrics.org. “Alternative Asset Management Industry Statistics.” 2024.
- Cerulli Associates. “U.S. Private Markets 2025: Private Markets Retail Assets to Reach $3.7 Trillion Through 2029.” Cerulli Press Release, 2025.
- U.S. Department of Labor (DOL). Field Assistance Bulletin 2020-02. Private Equity in 401(k) Plans. DOL.gov.
- U.S. Department of Labor (DOL), EBSA. “New DOL Rule Opens Safe Harbors for Alts Access in 401(k)s.” EBSA Press Release, March 30, 2026.
- Patterson Belknap Webb & Tyler LLP. “DOL Begins to Act Under the New Executive Order Aimed to Increase Alternative Investments in Retirement Plans.” PBWT.com, 2025.
- U.S. Securities and Exchange Commission, Investor Advisory Committee. “Recommendation on Private Market Assets.” SEC.gov, September 18, 2025.
- ASPPA. “U.S. Retirement Assets and Participation: State of Things.” ASPPA-NET.org, 2023.
- WealthManagement.com. “New DOL Rule Opens Safe Harbors for Alts Access in 401(k)s.” 2026.
¹ Quote attributed to Eric Satz, CEO of AltoIRA, reproduced with permission from AltoIRA. AltoIRA is not affiliated with Rialto Markets and has not reviewed or endorsed this white paper. Included for illustrative and educational purposes only. For more information about AltoIRA, visit altoira.com.
² Quote attributed to Madison Trust Company, reproduced with permission. Madison Trust Company is not affiliated with Rialto Markets and has not reviewed or endorsed this white paper. Included for illustrative and educational purposes only.
For more information about Madison Trust Company, visit https://www.madisontrust.com/ .
IMPORTANT DISCLOSURES
This material has been prepared by Rialto Markets for educational and informational purposes only. It is intended to provide general information regarding retirement accounts, self-directed IRAs, private markets and related market developments. It does not constitute investment research, investment advice, legal or tax advice, a recommendation, or an offer to sell or a solicitation of an offer to buy any security, investment product or investment strategy. Nothing contained herein should be construed as a recommendation regarding the suitability of any investment or investment strategy for any particular investor.
Private market investments involve significant risks and are not suitable for all investors. Depending on the investment, risks may include loss of some or all invested capital, illiquidity, limited or no secondary market, valuation uncertainty, concentration risk, manager risk and other risks described in the applicable offering materials. Investors should carefully consider their investment objectives, financial circumstances, risk tolerance, liquidity needs and, where applicable, retirement-account requirements before making an investment decision.
Self-directed IRAs and other retirement accounts are subject to applicable tax, custody, eligibility, prohibited-transaction and other requirements. The availability of an investment through a retirement account does not mean that the investment is suitable for a particular investor or retirement account. Investors should consult their own financial, legal and tax professionals regarding their individual circumstances.
Information and statistics contained herein have been obtained from sources believed to be reliable; however, Rialto Markets does not represent or warrant their accuracy, completeness or timeliness. Market data, regulatory developments and other information are current only as of the date indicated and are subject to change without notice. Any projections, estimates, forecasts or forward-looking statements are based on assumptions and information available at the time of publication, are inherently uncertain and should not be relied upon as guarantees or indications of future results. Actual outcomes may differ materially.
References to third-party firms, platforms or market participants are provided for informational and illustrative purposes only and do not imply affiliation with, sponsorship by, recommendation of, or endorsement by Rialto Markets or the referenced third party unless expressly stated otherwise.
AltoIRA and Madison Trust Company are not affiliated with Rialto Markets. Quotations from representatives of AltoIRA and Madison Trust Company are included with permission for illustrative and educational purposes only and should not be construed as an endorsement of Rialto Markets, this publication, or any investment product or strategy.
Past performance of any investment, asset class, platform or investment strategy discussed or referenced herein is not indicative of future results.