Making Nature an Investible Asset Class

Last week, something extraordinary happened.

Oyster Heaven began restoring four million oysters off the coast of Norfolk, funded by the West Yorkshire Pension Fund and in partnership with Nestlé Purina.

It marked the UK’s first pension-backed oyster reef restoration. For the first time, a company is paying for the ecosystem services that reefs provide, while a pension fund finances the restoration, a small step in scale, but a big step in proving the model.

Norfolk Reef: Who Pays for Nature?

• Scale: 4 million oysters, seeded on custom reef bricks.
• Filtration Services: each oyster cleans 200 litres/day.
• Coastal defence: reefs dampen wave energy, protecting assets.Biodiversity: 3D reefs boost marine life.
• Who pays? Nestlé Purina securing marine supply chains and resilience. West Yorkshire Pension Fund: Financing the Reef as an Infrastructure Asset.

This is the model: corporates pay for resilience, investors back the assets, and members earn stable cash flows.

Oyster Filtration – How Oysters Can Clean Up The Ocean

From Norfolk to a Billion Oysters

And what began in Norfolk is the start of something much larger.

Our ambition, together with Oyster Heaven, is to restore a billion oysters across Britain’s coastal waters by 2035. Oyster reefs filter water, stabilise coastlines, and support fisheries. In doing so, they create measurable value that can be turned into revenues, making them tomorrow’s infrastructure.

Two decades ago, offshore wind was experimental. Today, it is indispensable. Oyster reefs are at the same starting line. The question is not whether these services have value, but how quickly portfolios can capture it.

The Trustee Lens: Material UK Risks

Trustees need to deliver returns while protecting members’ futures. Both are under threat from nature-related risks that oyster reefs can help address.

Erosion

• Approximately 30% of England and Wales’ coastline is eroding at a rate of more than 10 cm per year.
• Damages could cost the UK economy £12bn this century.
• Already, 21 English communities (worth £500m in property) are projected to be lost by 2100.
• Oyster reefs won’t stop erosion outright, but they slow it, stabilising sediments and reducing reliance on concrete walls that depreciate while reefs grow stronger.

Water quality

• In 2023, UK water companies discharged untreated sewage for 3.6 million hours.
• England’s bathing waters are now five times more likely to be polluted than EU equivalents.
• Each oyster filters up to 200 litres of water per day, reducing nutrient loads and improving bathing water quality. For utilities, insurers, and local authorities, that means lower costs, fewer penalties, and reduced reputational risk.

Biodiversity & fisheries

• The North Sea fishing industry contributes hundreds of millions of dollars annually to the GDP, supporting thousands of jobs.
• Degraded ecosystems threaten fish stocks and supply chains.
• Oyster reefs create 3D habitats that restore biodiversity, boosting marine life and coastal economies.

Making Nature Investible

At Rebalance Earth Earth, we view Nature as ‘Blue or Green’ infrastructure. To make it investible, we focus on three fundamentals:

1. Cashflow: predictable revenues from ecosystem services.
2. Utility: Oysters provide essential services, including clean water, biodiversity uplift, and coastal defence.
3. Scarcity: native oyster reefs are near extinction. Scarcity creates value.

And every project must deliver across our Four Returns Framework:

1. Financial: target returns of 10% net IRR, contractual, uncorrelated revenues.
2. Natural: billions of litres filtered daily, marine biodiversity uplift, restored coastlines.
3. Social: jobs in coastal communities and strengthened local resilience.
4. Inspirational: visible pride, much like offshore wind before it became mainstream.

An income in retirement is worth more in a world worth living in.

Investing using the Four Returns Framework

Scaling Up: Project Luna

Project Luna, in Norfolk proved the model. The next step is  which involves seeding millions more oysters on reef bricks a repeatable template for restoration. From there, reefs can be replicated across estuaries and coastlines, aggregated into portfolios, and financed at an institutional scale.

The roadmap is simple: prove, replicate, aggregate, mobilise. That pathway can channel up to one billion oysters in our coastal waters.

One billion oysters is not just a target. It’s a blueprint for resilience.

Portfolio Fit: Why Oysters Belong in Pension Funds

For trustees, oyster reefs strengthen portfolios in three ways:

1. Reducing systemic risk from erosion, pollution, and marine biodiversity loss.
2. Providing stable, contractual revenues that are uncorrelated and inflation-linked.
3. Delivering place-based impact in UK communities, aligning pensions with real-world outcomes.

Oyster reefs don’t just restore ecosystems. They strengthen our balance sheets and our communities.

Aligned with Fiduciary Duty

Oyster reefs provide resilience services traditionally delivered by heavy infrastructure. They do so naturally, often at lower cost, and with environmental gains. For trustees, this means:

• Portfolio resilience against climate and nature risks.
• Regulatory alignment with TNFD, FCA SDR, and fiduciary guidance.
• Value for money.

Ignoring these risks is no longer prudent. Investing in resilience is.

Member Outcomes: Pensions Made Tangible

When members see offshore wind turbines, they can say: “My pension built that.”

In the future, they should be able to stand on Britain’s coastline, look out at restored reefs, and say: “My pension helped bring that back.” Pensions should deliver more than numbers on a statement. They should provide a future that members can take pride in. From pots of money to places restored.

A UK Worth Living In

Restoring a billion oysters is not only about financial resilience. It’s about legacy. A pension that delivers income in retirement and restores Britain’s seas, protects communities, and revives marine biodiversity offers members more than financial security. It offers pride. Legacy is not just the returns we deliver, but the world we leave behind.

Call to Action: From Wind to Reefs

The LGPS and DC master trusts contributed to the development of Britain’s wind farms. Now they can help build their living reefs.

Norfolk shows the model works. Project Luna sets the roadmap. The opportunity is clear. UK pension funds now have the opportunity to allocate to resilience that benefits both portfolios and people, starting here in the UK. Because when Nature thrives, so do portfolios.

What if?

The UK becomes the fastest recovering Nature country in the world? A bold, but totally achievable goal given our starting point, our financial expertise, our environmental leadership, and our pension fund system.

What if…