Private equity meets 401(k)s

The US Department of Labor is opening retirement plans to private equity and other alternative assets, and the money flows through structures London lawyers build.

What happened

• The US Department of Labor is making it materially easier for 401(k) plans to invest in alternative assets — most notably private equity and crypto, but also real estate and infrastructure.
• It follows an executive order signed in August 2025, 'Democratizing Access to Alternative Assets for 401(k) Investors'.
• How is it being done? Plan sponsors — the employers who administer benefit plans such as 401(k)s — are bound by a duty of prudence. Decades of case law have established that choosing an actively managed fund when a comparable index fund is materially cheaper can count as imprudent, and alternative assets charge far higher fees than index funds. Sponsors have therefore steered clear.
• The new rule provides that a sponsor which satisfies a set of safe harbour factors is presumed to have acted prudently. In effect it is regulatory cover: meet the factors and it becomes much harder to be sued for making the allocation.

How to use this in applications and interviews

• This is a significant development for private equity. The change is expected to channel around $178 billion a year into alternative investments.
• Be careful with the timeline, because that is where candidates overreach. It will not happen overnight: asset managers first have to build products that fit inside 401(k) plumbing, and sponsors have to work out how to satisfy the safe harbour factors in practice.
• The London angle is the one worth making. The rule pushes more US retirement money into private equity, and the flow runs like this: US lawyers structure a US-compliant wrapper — the legal container holding the 401(k) money — which then feeds into the underlying PE fund, typically a Luxembourg or Cayman vehicle structured by London lawyers.
• That is because London is the private equity hub of Europe, which is a better answer to "why this market?" than anything about tradition.
• Then follow the money downstream: more US capital in private equity and alternative assets means more and larger buyouts, M&A, infrastructure and financing mandates.

Key terms

• 401(k) is the main US employer-sponsored retirement savings plan, holding trillions of dollars that have historically sat in listed equities and index funds.
• Plan sponsor is the employer that establishes and administers the plan, and carries the fiduciary duties that come with it.
• Safe harbour is a defined set of conditions which, if met, are treated as compliance — moving the argument from "was this prudent?" to "were the conditions satisfied?".