Ineffable Intelligence Raises $1 Billion In Seed Funding Led By Sequoia Capital

Ineffable Intelligence, a London-based AI startup building reinforcement learning systems aimed at superhuman intelligence, raised $1,000,000,000 in seed funding led by Sequoia Capital with participation from Nvidia, Google, and Microsoft. Founder and CEO David Silver, creator of AlphaGo and former Google DeepMind leader, is developing endlessly learning AI systems that can self-discover new knowledge beyond human data. The company is focused on advancing reinforcement learning as an alternative to large language model–only approaches. The new funding will accelerate research and talent acquisition as it builds toward general superintelligence. FOUNDER: David Silver INVESTORS: Sequoia Capital, Nvidia, Google, Microsoft ROUND: Seed AMOUNT: $1,000,000,000 HQ: #London #UK #VentureCapital #IneffableIntelligence #DavidSilver #SequoiaCapital #Nvidia #Google #Microsoft #TradedVC

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Valar Atomics Secures $1 Billion In Series B Financing Led By Sequoia CapitalValar Atomics has raised a $1 billion Series B round led by Sequoia Capital, with participation from Valor Equity Partners, Atreides Management, Point72, Conviction, and several other new and existing investors, while also securing a $200 million credit facility led by Erebor Bank and J.P. Morgan. As part of the financing, Sequoia partner Shaun Maguire will join the company’s board. The funding comes as Valar advances its mission to make energy more affordable and abundant through fleets of small, safe nuclear reactors deployed in large-scale “Gigasites.” The company highlighted recent milestones including achieving criticality with its reactor and generating nuclear power to run an NVIDIA Blackwell system, and says the new capital will support the transition from reactor demonstrations to large-scale manufacturing and deployment. FOUNDER: Isaiah Taylor INVESTORS: Sequoia Capital, Valor Equity Partners, Atreides Management, Point72, Conviction, Apandion, Dream Ventures, HOF Capital, Riot Ventures & Snowpoint Ventures ROUND: Series B AMOUNT: $1,000,000,000 HQ: El Segundo, California #VentureCapital #ValarAtomics #IsaiahTaylor #TradedVC

Olix Raises $312 Million In Series B Funding At $3.3 Billion ValuationOlix, a UK-based AI chip startup founded by James Dacombe, has raised $312 million in a Series B funding round at a $3.3 billion valuation, more than tripling its valuation from $1 billion just six months earlier. The round was backed by investors including Arm, Fundomo, Hudson River Trading, Reed Hastings, and the UK government’s Sovereign AI venture fund. Olix is developing a suite of specialized AI inference chips connected through a novel photonic interconnect, an approach designed to improve performance, efficiency, and scalability compared with traditional architectures. The new funding will support development of its custom silicon platform and help bring its first chip to customers in the second half of 2027. FOUNDER: James Dacombe INVESTORS: Arm, Fundomo, Hudson River Trading, Reed Hastings, UK Government Sovereign AI Venture Fund & Creandum ROUND: Series B AMOUNT: $312,000,000 VALUATION: $3,300,000,000 HQ: London, United Kingdom #VentureCapital #Olix #JamesDacombe #TradedVC

Zenity Secures $125 Million In Series C Funding Led By Norwest And Multiple InvestorsZenity, a Tel Aviv, Israel-based provider of an AI security and governance platform for AI agents, raised $125 million in Series C financing led by Norwest, with participation from Qumra Capital, SoftBank Vision Fund 2, Hitachi Ventures, LG Technology Ventures, Vertex Ventures, Third Point Ventures, DTCP, and Intel Capital. Co-founded by CEO Ben Kliger and CTO Michael Bargury, the company will use the new funding to accelerate platform innovation, expand Zenity Labs, grow its presence across Europe and Asia Pacific, and meet rising enterprise demand for AI agent security. FOUNDERS: Ben Kliger & Michael Bargury INVESTORS: Norwest, Qumra Capital, SoftBank Vision Fund 2, Hitachi Ventures, LG Technology Ventures, Vertex Ventures, Third Point Ventures, DTCP & Intel Capital ROUND: Series C AMOUNT: $125,000,000 HQ: Tel Aviv, Israel #VentureCapital #Zenity #BenKliger #MichaelBargury #TradedVC

Horizon3 Raises $250 Million In Series E Round Led By NightDragon And NEAHorizon3, a San Francisco-based cybersecurity startup, raised $250 million in a Series E round at a valuation exceeding $2 billion, bringing its total funding to $428.5 million. The round was co-led by NightDragon and NEA, with participation from Acrew Capital, Blue Cloud Ventures, Demeter Group, EDBI, PSG, SAIC, Sapphire Ventures, Craft Ventures, Prosperity7 Ventures, Qualcomm Ventures, Ridge Ventures, SignalFire, and others, and the company said it will use the proceeds to expand globally and scale its AI-native security platform NodeZero; CEO Snehal Antani said the company is also investing in autonomous AI agents that can remediate vulnerabilities alongside its offensive security capabilities. FOUNDERS: Snehal Antani & Anthony Pillitiere INVESTORS: NightDragon, NEA, Acrew Capital, Blue Cloud Ventures, Demeter Group, EDBI, PSG, SAIC, Sapphire Ventures, Craft Ventures, Prosperity7 Ventures, Qualcomm Ventures & Ridge Ventures, SignalFire ROUND: Series E AMOUNT: $250,000,000 VALUATION: $2,000,000,000 HQ: San Francisco, California #VentureCapital #Horizon3 #SnehalAntani #AnthonyPillitiere #TradedVC