Sustainability's New Role in Private Markets

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"The impact investing market has now surpassed $1.5 trillion globally, while the share of limited partners citing ESG evidence as a major due diligence factor has risen sharply from 38 per cent in 2021 to over 57 per cent recently."

Sustainability has moved from a compliance checkbox to a core underwriting consideration across private markets. Investors allocating to private equity, infrastructure and real estate increasingly expect sustainability integration as standard practice, not as a differentiating extra.

The data support that shift. The Global Impact Investing Network estimates the impact investing market has surpassed $1.5 trillion globally, spanning private equity, credit, real estate and infrastructure. Separately, industry surveys show the proportion of limited partners citing ESG evidence as a major factor in due diligence has risen from 38 per cent in 2021 to 57 per cent more recently, a clear signal that sustainability scrutiny has become embedded in capital allocation decisions rather than treated as optional.

For the investor at the centre of this story, an institutional allocator, family office or private wealth client seeking durable, well-governed exposure to real assets, the mission is to ensure that sustainability integration translates into genuine risk management and value creation, not simply reporting for its own sake. Infrastructure fundraising rebounded sharply in 2025, reaching more than $250 billion after a six-year low of $99 billion in 2024, with decarbonisation and digital infrastructure among the primary drivers of renewed capital deployment.

The obstacle lies in inconsistency. Sustainability metrics across private equity, infrastructure and real estate remain poorly standardised, and portfolio companies frequently report inconsistent or incomparable data across fiscal years and asset managers. This creates genuine measurement challenges for investors trying to compare sustainability performance meaningfully across a diversified private markets portfolio, rather than relying on qualitative assurances alone.

This is where a guide becomes essential. Specialist due diligence and reporting frameworks can help investors translate sustainability considerations into comparable, decision-useful metrics across asset classes, evaluate general partners on the substance rather than the presentation of their sustainability practices, and identify where genuine value creation, rather than reputational positioning, is occurring. The path typically follows three steps: understand which sustainability factors are financially material to a given asset class, evaluate general partner and asset-level practices against consistent criteria, and access opportunities where integration is embedded in operational decision-making rather than bolted on for disclosure purposes.

Real estate and infrastructure illustrate the trend particularly clearly. Decarbonisation is increasingly treated as a foundational investment lens across private markets, shaping underwriting standards, asset management practices and long-term portfolio rotation toward real assets aligned with structural demand for cleaner, more resilient infrastructure.

The resolution for investors is not a guaranteed outcome but a more disciplined basis for portfolio construction. Recognising which sustainability claims are substantiated by measurable data, and which remain largely presentational, allows investors to allocate with greater confidence across an increasingly complex private markets landscape.

The higher purpose extends beyond any single allocation. As private capital becomes essential to meeting global infrastructure needs estimated at $106 trillion through 2040, portfolios built around genuine, well-measured sustainability integration are likely to prove more resilient to regulatory change, reputational risk and long-term structural demand shifts across real assets.

Investor appetite continues to broaden across the private markets landscape. Evergreen fund structures, offering more flexible, longer-term capital commitments, have surpassed $500 billion in assets and have consistently outperformed closed-end peers across private equity, credit and real estate, suggesting that patient, sustainability-aligned capital is finding increasingly credible, durable pathways into private markets more broadly.

Sustainability integration in private markets remains an evolving discipline, with data standardisation still developing across asset classes. Past performance does not guarantee future results, and decisions regarding sustainability-linked allocations should be made independently or in consultation with a regulated financial adviser.

Disclaimer: The content provided herein is for general informational purposes only and does not constitute financial or investment advice. It is not a substitute for professional consultation. Investing involves risk, and past performance is not indicative of future results. We strongly encourage you to consult with qualified experts tailored to your specific circumstances. By engaging with this material, you acknowledge and agree to these terms.