The most active UK Series A investors funding startups with proven traction.

💡 This page features the most active UK Series A investors: venture capital firms backing startups that have proven traction and are ready to scale.
Looking for other types of investors? Explore our dedicated lists for angel investors, pre-seed VCs, seed VCs, or browse venture capitalists by sector.
Series A funding is where a startup moves from proving a concept to scaling a business. It’s the point where investors back strong evidence, repeatable revenue, clear product–market fit, and the potential to build something enduring.
The firms below are among the most active Series A investors in the UK. They typically invest in startups that have outgrown the early stage: teams with working products, loyal customers, and data showing traction. A Series A round isn’t about taking a bet on an idea, it’s about accelerating what already works.
Series A investors focus on helping founders professionalise their operations, hire key talent, and expand into new markets. They often lead the first institutional round, set the valuation benchmarks for later stages, and play an active role on the board as the company matures.
This list tracks the UK funds most frequently participating in Series A rounds, the investors shaping the next wave of high-growth British companies.
| Series A VCs | Investment Sector | Location | Funding Round | Contact Details |
|---|---|---|---|---|
![]() Razor Capital(4 contacts 🔒) Razor Capital is a venture firm focused on discovering unique investment op... | London | |||
London | ||||
![]() Round Hill Ventures(3 contacts 🔒) Round Hill Capital is a leading global real estate investment manager found... | London | |||
![]() RTP Global(10 contacts 🔒) RTP Global invests in ambitious founders reshaping the world through techno... | London | |||
![]() Saffron Hill Ventures(1 contacts 🔒) Saffron Hill Ventures is a venture capital firm focused on early-stage inve... | London | |||
![]() Samaipata(5 contacts 🔒) Samaipata is a venture capital firm that focuses on empowering bold entrepr... | London | |||
![]() Samos Investments(3 contacts 🔒) Samos is a venture capital investor specialising in high-growth European bu... | London | |||
![]() NorthEdge(8 contacts 🔒) The provided content does not contain specific information about the ventur... | Manchester | |||
![]() Scottish Enterprise(4 contacts 🔒) The firm focuses on supporting early-stage and growing companies in Scotlan... | Glasgow | |||
![]() Scottish Equity Partners(13 contacts 🔒) SEP is a leading growth equity investor focusing on enterprise software and... | London | |||
![]() | Bristol | |||
![]() Seedcamp(7 contacts 🔒) The firm focuses on investing in the healthcare sector, particularly in per... | London | |||
![]() Semantic(2 contacts 🔒) The firm focuses on investing in technology-driven sectors related to data ... | London | |||
![]() Seraphim Capital(5 contacts 🔒) Seraphim is a global leader in SpaceTech investment, focusing on early-stag... | Data analyticsMobilitySpaceTechnology | London |
Click here for a full list of 801 UK VC Funds