SpaceX - Who is controlling your DC Pension investment strategy?

Move over, Magnificent Seven. With SpaceX due to begin trading on Nasdaq on 12 June at $135 per share, targeting a c.$1.75-$1.77 trillion valuation and a $75 billion raise¹, and both Anthropic and OpenAI widely anticipated to follow, public markets may be moving towards a new tech cohort: the Magnificent Ten, and a growing class of large, often earlier-stage companies now gaining entry to mainstream equity indices.

For UK pensions, this is not just a story about rockets or artificial intelligence. It is about what may end up in members’ retirement pots through the mechanics of modern investing, and who is really making those decisions.

Members could become investors in SpaceX by default

DC schemes typically hold up to 100% in growth assets for younger members, with global equities forming the core of most defaults. Defined benefit (DB) schemes, by contrast, typically hold less than 20% in equities, reflecting their more mature funding position and ongoing de-risking.

This means that there is a strong likelihood that most defined contribution (DC) members will gain meaningful exposure to SpaceX, Anthropic or OpenAI through their default investment strategies, which now dominate workplace pensions.

That matters because often these default strategies are passively managed to an index benchmark, with no-one truly accountable for the specific decision to invest.

The structure of these IPOs makes that especially interesting.

SpaceX is expected to float only around 4-5% of its shares, despite potentially becoming one of the largest listed companies globally by headline market capitalisation. Elon Musk is also expected to retain more than 80% of voting control through a dual-class structure.

On a free-float-adjusted basis, that would likely result in a relatively modest initial weighting in broad global equity indices, probably well below 1%, and potentially only a few tenths of a percent depending on the benchmark methodology used. This is unlikely to overwhelm member outcomes on day one.

But this is the thin end of an IPO-shaped wedge.

The significance lies in what the SpaceX IPO reveals about how new companies can enter members’ portfolios through benchmark rules and passive implementation structures,  often without any explicit decision at an individual stock level.

Denmark’s AkademikerPension² has reportedly blacklisted SpaceX, citing valuation concerns and a “catastrophic governance structure”, an active decision most standard passive defaults cannot make.

With Anthropic and OpenAI also widely expected to move towards public markets, and future share issuance potentially increasing index weightings over time, this may represent the beginning of a new “Magnificent Ten” era for passive equity investing.

The devil is in the detail

Different index providers are also taking materially different approaches to mega-IPOs. Some have accelerated³ inclusion rules, allowing eligible companies into benchmarks after only a few trading days. Others retain stricter profitability or float requirements, potentially delaying inclusion for longer. The result is that two DC default strategies, both described as “global equity”, could end up with meaningfully different exposure pathways.

Implementation matters too.

Passive management is not simply a mechanical exercise of buying exact index weights immediately at inclusion. Managers often use discretion around trading windows, liquidity and portfolio transitions to reduce transaction costs and manage tracking error. In practice, this can smooth member outcomes and reduce some of the short-term volatility surrounding high-profile IPOs. Some pension providers may create their own effective seasoning period through bespoke benchmark rules, ESG screening and scheduled rebalance cycles, further smoothing member exposure to large IPOs.

So, on the face of it, there may appear to be little to worry about for now. Initial exposure may be modest. Tracking error effects are likely to be small relative to broader asset allocation decisions. And future increases in exposure may emerge gradually as additional shares come to market.

Diversification, but up the risk curve

There is also a genuinely positive angle here.

Through low-cost index-based investing, pension savers may gain access to companies that historically would have remained largely in private markets and venture capital portfolios. In that sense, mega-IPOs could broaden the investment opportunity set available within DC pensions.

This is not simply “more technology exposure”. It is diversification into a different type of risk. The existing Magnificent Seven companies are highly profitable, cash-generative and relatively mature businesses. SpaceX is earlier stage, capital-intensive and still dependent on significant future execution to justify its valuation.

Morningstar, for example, has valued SpaceX at roughly half the proposed IPO level, highlighting the uncertainty embedded in growth expectations.

In effect, pension savers may be gaining exposure to something closer to late-stage venture capital, but through daily-dealt public market funds.

That may ultimately prove beneficial for long-term member outcomes. But valuation will be critically important.

The governance gap

Then there is governance, but this is where things start to unravel.

With only a limited public float and voting control concentrated with the founder, investors could end up owning economic exposure without the normal avenues of shareholder influence. Good stewardship assumes engagement, voting and escalation can influence outcomes. That assumption becomes harder to sustain where control is tightly held from the outset.

This raises a very important question for DC schemes - for members invested through static strategic allocations, passive implementation and default strategies, who is ultimately making the decision to allocate to these companies?

In practice, it may not be the trustee, provider or employer. It may instead be a combination of:

• the founder deciding to IPO;
• the index provider deciding when inclusion occurs; and
• the particular benchmark followed by the manager.

That does not mean the outcome is wrong. But it does mean the allocation decision may be occurring implicitly rather than explicitly.

SpaceX is unlikely to “break” DC defaults on day one. But it may signal a broader shift in how public markets evolve, towards larger, later-stage, lower-float and more founder-controlled businesses entering members’ portfolios through index mechanics alone.

The real question for trustees, employers and providers

The issue, then, is less about one stock and more about whether existing DC governance frameworks are fully equipped for this next phase of public markets.

As the Magnificent Ten takes shape, trustees, employers and providers may increasingly need to revisit whether their chosen equity approaches, benchmarks and implementation structures still deliver the outcomes they expect for members.

Because in this new environment, benchmark index selection is not just an incidental implementation decision.

It becomes a decision that could meaningfully influence member outcomes.