<div class="gn-article"><div class="gn-hero gn-reveal"> <div class="gn-hero__image"><img src="https://cdn.prod.website-files.com/687a235da6861294eec73166/6a29d65bdcab7c6d21f98833_editors-choice-may-2026-banner-6a2820b9e5ee8038505687.jpeg" alt=""></div> <div class="gn-hero__head"> <span class="gn-kicker"><span class="dot"></span>Intelligence</span> <h1 class="gn-title">Investment: Round-Up: May 2026</h1> <div class="gn-meta"> <strong>The GO Network</strong> <span class="pip"></span> <span>1 June 2026</span> <span class="pip"></span> <span>3 min read</span> </div> </div> </div> <div class="gn-body"> <p class="gn-lede gn-reveal">UK early-stage activity in May was led by a small group of funds making multiple checks across the month. Names worth knowing for agencies tracking where the next briefs are forming.</p> <div class="gn-list-item gn-reveal"> <div class="gn-list-item__head"> <span class="gn-list-item__num">#01</span> <h3 class="gn-list-item__title">Recursive Superintelligence raises $650M Series A</h3> </div> <div class="gn-list-item__meta"> <span class="gn-list-item__pill"><strong>Brand:</strong> Recursive Superintelligence</span> <span class="gn-list-item__pill"><strong>Sector:</strong> AI / Frontier Models</span> <span class="gn-list-item__pill"><strong>Type:</strong> Series A</span> <span class="gn-list-item__pill"><strong>Source:</strong> The SaaS News</span> </div> <p class="gn-reveal">London-based continuous-learning AI startup Recursive Superintelligence emerged from stealth with a $650M Series A backed by Nvidia and GV (Google Ventures), valuing the firm at $4.65bn. The round is one of the largest UK AI raises on record.</p> <figure class="gn-fig gn-reveal"> <div class="gn-fig__media"><img src="https://cdn.prod.website-files.com/687a235da6861294eec73166/6a29d65cdcab7c6d21f98865_6a292e7e8d35d1e9323561f2_recursive-701-6a281fbd2b9c0271197144.webp" alt="Recursive Superintelligence"></div> </figure> </div> <div class="gn-list-item gn-reveal"> <div class="gn-list-item__head"> <span class="gn-list-item__num">#02</span> <h3 class="gn-list-item__title">Wordsmith raises $70M Series B</h3> </div> <div class="gn-list-item__meta"> <span class="gn-list-item__pill"><strong>Brand:</strong> Wordsmith</span> <span class="gn-list-item__pill"><strong>Sector:</strong> AI / Legal Tech</span> <span class="gn-list-item__pill"><strong>Type:</strong> Series B</span> <span class="gn-list-item__pill"><strong>Source:</strong> Bloomberg</span> </div> <p class="gn-reveal">AI legal platform Wordsmith raised a $70M Series B led by Highland Europe with participation from Index Ventures and others. The platform serves corporate legal teams and plans to use the capital to expand into the US market.</p> <figure class="gn-fig gn-reveal"> <div class="gn-fig__media"><img src="https://cdn.prod.website-files.com/687a235da6861294eec73166/6a29d65cdcab7c6d21f98859_6a292e8eb5452b7b9fd58694_othkkrz95gakeidbhrcrmoev6zca7edo2zbtbm4v-6a281fbd0ad9c534238831.webp" alt="Wordsmith"></div> </figure> </div> <div class="gn-list-item gn-reveal"> <div class="gn-list-item__head"> <span class="gn-list-item__num">#03</span> <h3 class="gn-list-item__title">Semble raises £30M Series C</h3> </div> <div class="gn-list-item__meta"> <span class="gn-list-item__pill"><strong>Brand:</strong> Semble</span> <span class="gn-list-item__pill"><strong>Sector:</strong> Digital Health Infrastructure</span> <span class="gn-list-item__pill"><strong>Type:</strong> Series C</span> <span class="gn-list-item__pill"><strong>Source:</strong> Business Wire</span> </div> <p class="gn-reveal">London-based healthcare technology company Semble secured a £30M Series C led by European growth equity fund Revaia to scale its clinical software platform across new markets.</p> <figure class="gn-fig gn-reveal"> <div class="gn-fig__media"><img src="https://cdn.prod.website-files.com/687a235da6861294eec73166/6a29d65cdcab7c6d21f98853_6a292e8ffbf08c1e4da33e82_semble-raises-30m-in-series-c-round-led-by-revaia-6a281fbd228b0755646466.webp" alt="Semble"></div> </figure> </div> <div class="gn-list-item gn-reveal"> <div class="gn-list-item__head"> <span class="gn-list-item__num">#04</span> <h3 class="gn-list-item__title">Fuse Energy raises $30M+ Series B extension</h3> </div> <div class="gn-list-item__meta"> <span class="gn-list-item__pill"><strong>Brand:</strong> Fuse Energy</span> <span class="gn-list-item__pill"><strong>Sector:</strong> Energy / Climate Tech</span> <span class="gn-list-item__pill"><strong>Type:</strong> Series B extension</span> <span class="gn-list-item__pill"><strong>Source:</strong> 20VC / LinkedIn</span> </div> <p class="gn-reveal">Decentralised green energy network provider Fuse Energy secured a $30M+ Series B extension led by Harry Stebbings' 20VC Fund. The company recently hit $550M ARR and announced it had reached profitability.</p> <figure class="gn-fig gn-reveal"> <div class="gn-fig__media"><img src="https://cdn.prod.website-files.com/687a235da6861294eec73166/69fcb949ef93945df99c778b_69fcb9479ee8acada79463b2_fuse-energy-raises-e59-million-to-accelerate-expansion-of-energy-operations-6968.webp" alt="Fuse Energy"></div> </figure> </div> <div class="gn-list-item gn-reveal"> <div class="gn-list-item__head"> <span class="gn-list-item__num">#05</span> <h3 class="gn-list-item__title">Castore secures £90M credit facility</h3> </div> <div class="gn-list-item__meta"> <span class="gn-list-item__pill"><strong>Brand:</strong> Castore</span> <span class="gn-list-item__pill"><strong>Sector:</strong> Sportswear / Retail</span> <span class="gn-list-item__pill"><strong>Type:</strong> Credit Facility (Debt)</span> <span class="gn-list-item__pill"><strong>Source:</strong> SGB Media</span> </div> <p class="gn-reveal">Manchester-based sportswear brand Castore secured a £90M ($122M) revolving credit facility arranged by HSBC UK, BNP Paribas and Lloyds. The capital will fund new UK retail locations and expansion into Middle Eastern and Asian markets, alongside investment in digital infrastructure and analytics. The company is targeting turnover exceeding £300M next financial year.</p> <figure class="gn-fig gn-reveal"> <div class="gn-fig__media"><img src="https://cdn.prod.website-files.com/687a235da6861294eec73166/6a29d65bdcab7c6d21f9884a_6a292e93e2b0f0e8901666ef_cf200eb52eca3e0b3c580edf7a29d0ef212abfa7-2520x2289-6a281fbd1c005008327799.jpeg" alt="Castore"></div> </figure> </div> <div class="gn-list-item gn-reveal"> <div class="gn-list-item__head"> <span class="gn-list-item__num">#06</span> <h3 class="gn-list-item__title">Third Space Learning secures £4.4M for AI maths tutoring</h3> </div> <div class="gn-list-item__meta"> <span class="gn-list-item__pill"><strong>Brand:</strong> Third Space Learning</span> <span class="gn-list-item__pill"><strong>Sector:</strong> EdTech / AI Tutoring</span> <span class="gn-list-item__pill"><strong>Type:</strong> Growth investment</span> <span class="gn-list-item__pill"><strong>Source:</strong> EdTech Innovation Hub</span> </div> <p class="gn-reveal">Online maths tutoring platform Third Space Learning secured £4.4M to integrate generative AI diagnostics into its live human-tutor network. Existing investors include Blackfinch Ventures, Maven Capital Partners and Foresight Group.</p> <figure class="gn-fig gn-reveal"> <div class="gn-fig__media"><img src="https://cdn.prod.website-files.com/687a235da6861294eec73166/6a29d65cdcab7c6d21f98862_6a292e98e2b0f0e890166a63_third-space-learning-logo-cover-image-6a281fbd28638230427979.png" alt="Third Space Learning"></div> </figure> </div> <div class="gn-list-item gn-reveal"> <div class="gn-list-item__head"> <span class="gn-list-item__num">#07</span> <h3 class="gn-list-item__title">Quantcore raises £2.5M seed</h3> </div> <div class="gn-list-item__meta"> <span class="gn-list-item__pill"><strong>Brand:</strong> Quantcore</span> <span class="gn-list-item__pill"><strong>Sector:</strong> Deep Tech / Quantum Hardware</span> <span class="gn-list-item__pill"><strong>Type:</strong> Seed</span> <span class="gn-list-item__pill"><strong>Source:</strong> BusinessCloud</span> </div> <p class="gn-reveal">Glasgow-based University of Glasgow spin-out Quantcore raised £2.5M in seed funding to scale domestic manufacturing of niobium-based superconducting quantum components, supporting a sovereign UK supply chain for quantum hardware.</p> <figure class="gn-fig gn-reveal"> <div class="gn-fig__media"><img src="https://cdn.prod.website-files.com/687a235da6861294eec73166/6a29d65cdcab7c6d21f98856_6a292e9f49c007eac9b152a2_glasgows-quantcore-secures-2-5m-to-boost-uk-quantum-hardware-supply-chain-6a281f.webp" alt="Quantcore"></div> </figure> </div> <div class="gn-list-item gn-reveal"> <div class="gn-list-item__head"> <span class="gn-list-item__num">#08</span> <h3 class="gn-list-item__title">Tolemy Bio raises €1.4M pre-seed</h3> </div> <div class="gn-list-item__meta"> <span class="gn-list-item__pill"><strong>Brand:</strong> Tolemy Bio</span> <span class="gn-list-item__pill"><strong>Sector:</strong> Life Sciences / AI Bio-tooling</span> <span class="gn-list-item__pill"><strong>Type:</strong> Pre-seed</span> <span class="gn-list-item__pill"><strong>Source:</strong> EU-Startups</span> </div> <p class="gn-reveal">Life sciences software startup Tolemy Bio raised €1.4M in pre-seed funding led by Norrsken Evolve, with participation from JME, Big Sur, Masia and a UK stealth fund. The capital will fund development of Orbit, an AI-native control panel that converts messy lab data into AI-ready intelligence.</p> <figure class="gn-fig gn-reveal"> <div class="gn-fig__media"><img src="https://cdn.prod.website-files.com/687a235da6861294eec73166/6a29d65cdcab7c6d21f9885c_6a292ea0be3fd1326929dfdd_1778653861278-6a281fbd1ac63233194285.jpeg" alt="Tolemy Bio"></div> </figure> </div> <div class="gn-divider gn-reveal" aria-hidden="true"></div> <h2 class="gn-reveal">Most Active Investors This Month</h2> <p class="gn-reveal">UK early-stage activity in May was led by a small group of funds making multiple checks across the month. Names worth knowing for agencies tracking where the next briefs are forming:</p> <aside class="gn-callout gn-reveal"> <div class="gn-callout__label">Most active investors</div> <h4>Funds to watch</h4> <ul> <li><strong>Fuel Ventures</strong> closed 9 distinct early-stage software checks, the most of any UK B2B seed investor in May.</li> <li><strong>Blackfinch Ventures</strong> completed 6 regional technology investments using its EIS/SEIS structure to back regional enterprise software startups.</li> <li><strong>Practica Capital</strong> closed 6 early-stage deals across deeptech and B2B SaaS with cross-border UK exposure.</li> <li><strong>LocalGlobe</strong> finalised 6 distinct pre-seed and seed investments, anchoring London's pre-seed ecosystem.</li> <li><strong>Felix Capital</strong> executed 6 early-stage checks across consumer tech and digital lifestyle.</li> <li><strong>Northstar Ventures</strong> deployed 5 early-stage investments into clean-tech and university spinouts in the North of England.</li> <li><strong>Seedcamp</strong> completed 5 rapid pre-seed investments targeting European and UK technical founders at inception stage.</li> <li><strong>Cur8 Capital</strong> closed 5 early-stage deals focused on ethical, sharia-compliant finance tools.</li> </ul> </aside> <p class="gn-reveal">If your agency is targeting B2B SaaS, climate tech, edtech, fintech or quantum, the early-stage funds above are where the next round of newly-funded brands will emerge over the coming 6 to 12 months.</p> <p class="gn-reveal"><em>If your clients operate in or around these sectors, this month's movements may signal fresh challenges, shifts in budget priorities, or new partnership opportunities. We will be tracking investment and deal activity each month to help agencies stay commercially informed.</em></p> </div></div>