Hexseed Technology Secures £114k to Pioneer Carbon-to-Diamond Supermaterials

Hexseed Technology Limited, a Banchory-based startup at the forefront of carbon capture and utilisation (CCU), has successfully secured an estimated £114k in a recent funding round. This early-stage investment values the company at approximately £1.8m post-money.

Incorporated on 27 November 2025, Hexseed Technology is addressing critical environmental and industrial needs by transforming captured CO2 into high-value supermaterials. The company's core innovation lies in producing low-carbon, lab-grown industrial diamonds. These advanced diamonds are engineered for demanding applications across various high-tech sectors, including electronics, telecommunications, high-power lasers and optics, and precision instrumentation. The ultimate goal is to enable the creation of cooler, more reliable, and more powerful chips, pushing the boundaries of technological performance. With a lean team of two employees, Hexseed Technology operates on the principle that carbon should be viewed not as waste, but as a valuable raw material for advanced manufacturing.

The estimated £114k funding round for Hexseed Technology Limited saw its shares allotted on 1 April 2026, with the official filing date recorded as 29 April 2026. This capital injection has established an estimated post-money valuation of £1.8m for the nascent company. As a pre-seed stage investment, this funding provides crucial early capital for Hexseed Technology to further develop its proprietary CCU processes and scale its innovative production of industrial diamonds.

This funding round for Hexseed Technology aligns with a broader trend of growing investment in the UK's clean tech and deep tech sectors. The UK climate tech sector is currently valued at $75.3 billion and ranks fourth globally, home to over 2,200 climate tech startups and scale-ups. Deep tech, in particular, has seen its share of all UK venture capital funding triple over the last decade, now representing 31% of the total.

Early-stage investment in UK clean tech companies has shown significant growth in recent years. Between 2017 and 2021, seed and venture investments in UK-headquartered clean tech companies increased by 158%, rising from approximately £163 million to £420 million. Over the same period, the median size of seed rounds also grew, from £260,000 to £410,000. While Hexseed's £114k round is below this median, it reflects the very early pre-seed nature of the investment, providing foundational capital for a newly incorporated deep tech venture.

Despite a peak in overall UK climate tech investment at $5.5 billion in 2023, followed by a decrease to $1.8 billion in 2025, early-stage activity, including seed and Series A rounds, has remained comparatively stable. This indicates a continued appetite for backing innovative startups at their foundational stages, even as later-stage funding faces more pressure.

Carbon Capture, Utilisation, and Storage (CCUS) technologies, such as those being developed by Hexseed Technology, are increasingly recognised as a "rising star" within UK climate tech investment. The UK government has demonstrated strong support for the sector, committing £21.7 billion over 25 years to two major carbon capture clusters. Furthermore, over £100 million has been allocated to research and innovation for Carbon Capture and Greenhouse Gas Removals, including the £60 million Direct Air Capture (DAC) and Greenhouse Gas Removals (GGR) Innovation Programme, which specifically supports "First of a Kind" demonstrators. The market for utilised CO2 is projected to reach £440 billion by 2026, underscoring the significant economic potential of Hexseed Technology's approach. This investment in a Scottish-based deep tech company highlights the geographical diversity of innovation within the UK's expanding green economy.