The growth equity round was led by Decarbonisation Partners, a partnership between BlackRock and Temasek, and will reinforce neustark’s continued growth path and support their mission to permanently remove one million tons of CO2 in the year 2030.

Climate tech growth investor Blume Equity also participated in the round. The new investors join neustark’s existing backers, which are all continuing their support: Holcim, Siemens Financial Services, Verve Ventures, and ACE Ventures. In addition, UBS has contributed capital to the round via debt financing. Neustark also has a strategic collaboration with Holcim to scale up its carbon removal technology globally, enabling building solutions that are both circular and low-carbon.

The Swiss CDR specialist has developed and deployed an IP-protected solution that allows the durable removal of carbon dioxide from the atmosphere by capturing CO2 at point source, then binding it in mineral waste streams via an accelerated mineralisation process. 

Biogenic CO2 is captured from partnering biogas plants, then liquified and transported to construction waste recycling sites. There, the carbon dioxide is injected into concrete granulates from demolished buildings or other mineral waste such as slag and slurry. Neustark’s technology triggers an accelerated mineralisation process, binding the CO2 permanently to the pores and surface of the granules. The carbonated, recycled aggregate can then be used to build roads or to produce fresh recycled building materials. The mineralisation process stores the captured CO2 for hundreds of thousands of years, and the risk of reversal is proven to be slim to none.

“We turn the world’s largest waste stream – demolition concrete – into a carbon sink. In the last year, we have already deployed our unique solution at 19 sites. This growth investment will take us into the next exciting phase of our mission, helping us to further scale our impact across Europe, enter new markets in North America and Asia Pacific, and develop new solutions to store even more CO2 in mineral waste streams,” said Johannes Tiefenthaler, Co-CEO and Founder at neustark.

He added: “The CDR market is experiencing substantial growth, driven by high-quality and durable carbon removal solutions, and a surging demand for trusted carbon credits. Despite this, we need to exponentially accelerate the removal of CO2 if we want to reach net zero goals by 2050. This target will only be possible by globally deploying highly scalable, measurable and commercially viable carbon removal solutions at the scale of millions of tons per year.”

Together with construction recycling partners, neustark currently has 19 carbon capture and storage plants in operation across Switzerland, Austria, Liechtenstein, and Germany. Forty future plants are currently under construction across Europe, with a robust pipeline of projects beyond that. 

Neustark has sold nearly 120,000 tons of carbon removal to date, making it one of Europe’s fastest-growing carbon removal companies, with clients including Microsoft, UBS and NextGen. All projects are certified under the Gold Standard to ensure credible third-party assessment and transparency related to performance.  

Neustark will be able to capitalise on Decarbonisation Partners’ global platform and reach, including its access to corporates and investors across North America and Asia Pacific and its dedicated decarbonisation specialists as well as Blume Equity's deep climate network and expertise in scaling European disruptive climate tech companies. With their partnership, alongside neustark’s existing investors – all of whom possess extensive technology investment portfolios –, neustark will expand its team and enhance its offerings to meet the increasing global demand for CDR. 

Meghan Sharp, Global Head and Chief Investment Officer of Decarbonisation Partners, said: “With carbon capture, utilisation and storage being one of our key investment focuses, we believe that we have found a perfect partner to help scale the industry – and ultimately its decarbonisation impact – in the years to come. Neustark not only helps organisations integrate carbon removal to address their hard-to-abate emissions, but their solution also contributes to decarbonising the construction industry.”

 She added: “With their unique business model that seamlessly integrates two existing and mature industries without disrupting their day-to-day operations, neustark has established themselves as one of the global leaders in high-quality durable CDR with a solution that is removing carbon dioxide from the atmosphere today.”