Wren Classic Portfolio | Wren

The Wren Classic Portfolio

Specialization
Diversified
Cost per tonne
$25.​00
Last update
May 27, 2026

Portfolio Allocation

The Classic Portfolio supports a diverse selection of carefully vetted climate projects

The Wren Classic Portfolio is a dynamic collection of top-tier climate solutions meticulously curated for maximum impact.

In order to limit global warming to below 1.5°C, the IPCC estimates the globe needs to cut net anthropogenic CO₂ emissions from 2010 levels by 45% by 2030 and reach net zero by 2050. To do this, we urgently need to see deep reductions in greenhouse gas emissions across all sectors. In addition, it’s imperative to accelerate the pace and scale of carbon removal.

The Classic Portfolio balances support for greenhouse gas reductions, carbon dioxide removals, and critical policy initiatives. By approaching the climate crisis from multiple angles, this portfolio can help catalyze a transition to a sustainable and equitable future for all.

Rapid and far-reaching transitions across all sectors and systems are necessary to achieve deep and sustained emissions reductions and secure a liveable and sustainable future for all. These system transitions involve a significant upscaling of a wide portfolio of mitigation and adaptation options. ( IPCC, 2023)

Supporting Wren Classic diversifies your impact

We choose projects from a variety of countries, sectors, methodologies, and project developers. We do this because each solution carries unique risks and uncertainties. By strategically allocating funding to an assortment of projects with different risk and uncertainty profiles, we can maximize our chances for success.

For instance, consider nature-based climate solutions, such as reforestation and conservation efforts. These projects offer a cost-effective means to achieve necessary climate mitigation goals by 2030. However, all nature-based solutions are exposed to climate risks, like wildfires, that could lead to the re-release of carbon into the atmosphere. We still love nature-based solutions but don’t want to put all our resources into a project that could go up in smoke (literally and figuratively).

This logic of diversification extends to the impact we want the Portfolio to have as well. At Wren, we look for projects that will contribute to changing the systems that got us into this mess. That means finding projects that not only reduce greenhouse gases or remove carbon from the atmosphere, but also provide lasting benefits like green jobs, climate-friendly legislation, shifted demand patterns, and new climate technologies.

How we manage the portfolio

We carefully curate the Wren Classic Portfolio to maximize climate impact per dollar. We prioritize balancing the cost of the solution with the quality and potential of the solution. With a mix of low-cost ‘tried and true’ solutions and high-cost ‘emerging and impactful’ solutions, we can help scale new solutions and while still supporting existing ones.

To achieve the right mix of projects, we use the following principles to curate the portfolio:

  1. Support diverse climate change mitigation pathways. Each type of project has a unique set of risks and benefits. To minimize risk and maximize the impact of the overall portfolio, we fund projects that address the climate crisis from multiple angles.
  2. Put money where it's needed most. We deploy catalytic capital to accelerate climate action. This means we look for projects that rely on carbon market financing or philanthropy to occur. Put simply, if a project doesn’t need funds to operate, we won’t fund it.
  3. Support existing solutions and scale new ones. We’re not here to reinvent the wheel. The majority of the Classic Portfolio is comprised of solutions we know have a positive impact on the climate.

Verification

Projects in the Classic Portfolio fall into three categories: certified offsets, in-progress offsets, and additional contributions. Each category requires a different level of verification.

To qualify as a certified offset, the project's calculations of greenhouse gas reductions or carbon removal must be verified by a third-party auditor against a peer-reviewed methodology. In-progress offsets are required to go through the same process prior to Wren issuing offsets to our users. Our projects work with companies like ACR, Verra, Plan Vivo, Carbonfuture, and puro.earth to verify project impact.

Frequently Asked Questions

What are carbon offsets?
Carbon offsets are a way to compensate for your carbon emissions by investing in projects that reduce or remove an equivalent amount of greenhouse gases from the atmosphere, such as reforestation, conservation, or industrial gas abatement.

Can I trust the quality of your carbon offsets?
Every project Wren funds is evaluated against 250+ indicators that help us understand risks, additionality, permanence, leakage, the monitoring reporting and verification (MRV) methods, co-benefits, and potential for systems change.

What are common criteria for assessing the quality of a carbon offset?
Assessing the quality of a carbon offset involves evaluating various criteria to ensure that the offset represents a genuine and effective emissions reduction.