22 VC firms investing in security & cybersecurity and climate & clean energy at the Series B stage.
F4 Fund tracks 22 VC firms that actively invest in security & cybersecurity + climate & clean energy at the Series B stage, with check sizes ranging from $100K – $80M (median: $6M – $6M). As of June 2026, and 91% lead or co-lead rounds. Rankings are based on F4's proprietary analysis of 1,358+ researched VC firms, scored by data completeness, portfolio depth, investment recency, and stage alignment.
| # | Firm | Check Size | Portfolio | Leads? | Activity | Decision | Intro |
|---|---|---|---|---|---|---|---|
| 1 | ▶ Energy Impact Partners Technology and capital solutions for the global energy transition. We partner with entrepreneurs to build and scale innovative companies that power a better energy future, supported by collaborations with utilities and industrial incumbents. New York | $2M – $20M | 26 | Leads | Active | ~1 mo | Req'd |
| 2 | ▶ Toba Capital Partner with exceptional founders building technology companies with long-term growth potential capable of fundamentally shifting markets for the common good. Provide capital, operational expertise, board participation, and network access to support founder vision and company building. Los Angeles & Newport Beach, CA | $500K – $10M | 42 | Leads | Active | ~1 mo | Open |
| 3 | ▶ Tola Capital Every industry will be transformed by software. Tola practices hypothesis-based investing targeting the 'enterprise scaffolding' of AI — domain-specific models, AI/ML tooling, AI SaaS applications, AI governance, and AI security — rather than foundational AI infrastructure. They back companies driving long-term, transformational change in large markets. Seattle | $1M – $15M | 52 | Leads | Active | ~1 mo | Open |
| 4 | ▶ Cleveland Avenue Global venture capital firm investing in lifestyle consumer brands and technology companies that positively disrupt large and growing markets. Great investments require deep industry expertise, hands-on operational support, and access to strategic partners. Chicago | $1M – $50M | 68 | Leads | Active | ~1 mo | Req'd |
| 5 | ▶ Illuminate Financial Illuminate invests in companies solving mission-critical problems for financial institutions through fintech and enterprise software innovation. With deep access to tier-1 financial institution networks and specialized domain expertise, the firm creates unique value for portfolio companies through institutional customer access, operational guidance, and strategic partnerships. London | $1M – $8M | 31 | Leads | Active | ~1 mo | Open |
| 6 | ▶ Benhamou Global Ventures BGV backs hands-on, cross-border enterprise AI startups operating under the Enterprise 5.0 framework — companies that combine intelligent machines with human ingenuity to drive leapfrog productivity improvements. They focus on vertical AI (industry-specific, proprietary data) and horizontal agentic platforms (cross-functional automation), with a strong preference for immigrant founders pursuing US go-to-market strategies from France, Israel, and India. Menlo Park | $2M – $10M | 46 | Leads | Active | ~2 mo | Open |
| 7 | ▶ OMERS Ventures Back ambitious founders building disruptive early-stage technology companies. We provide not just capital but access to OMERS' multi-asset institutional platform. Our permanent pension backing gives us patient, long-duration capital unconstrained by traditional 10-year fund cycles. Toronto | $1M – $25M | 30 | Both | Active | ~1 mo | Req'd |
| 8 | ▶ AirTree Ventures Big things start small. We invest at seed stage and see potential where others don't. We believe in your vision for your company's future, not as it exists today. We think in decades, not days, committing to walk the entire journey with founders to build iconic companies. We share Antipodean ingenuity with the world. Sydney | $250K – $20M | 64 | Leads | Active | ~2 wks | Req'd |
| 9 | ▶ MassMutual Ventures Build category-defining technology businesses that deliver strong investment returns while addressing pressing business challenges. Leverage Fortune 500 parent (MassMutual) assets including real estate portfolios, renewable energy assets, and capital networks. Boston | $2M – $10M | 23 | Both | Active | ~1 mo | Open |
| 10 | ▶ Innovating Capital Technology can have a highly disruptive impact on society. We back founders on the forefront of innovation with clear vision towards positive change, leveraging domain expertise to ensure value creation. Founder-first approach with operational support. New York | $250K – $5M | 38 | Leads | Active | ~1 mo | Open |
| 11 | ▶ Vanedge Capital Deep technology and hard tech company investing at inflection points. Partner with technical founders building infrastructure-level solutions for global scale. Founded 2010 on belief that next generation of transformative companies require deep technical expertise, not just capital. Vancouver | $1M – $15M | 42 | Both | Active | ~2 wks | Open |
| 12 | ▶ Alumni Ventures We democratize venture capital by providing individual accredited investors with professional-grade access to elite venture opportunities. We leverage our massive 850,000+ community network and 11,000+ investors to create unique value for founders, sourcing and diligencing deals alongside top-tier VCs (a16z, Sequoia, Khosla) without leading rounds. Our network is our competitive advantage—it compounds value for all stakeholders. Manchester, NH | $250K – $5M | 58 | Follows | Active | ~2 wks | Open |
| 13 | ▶ Neotribe Ventures Breakthrough technologies that stretch the imagination — deep tech with the potential to create new product categories. We bring company-building skills and operating expertise to help founders find product-market fit. Menlo Park | $1M – $80M | 28 | Leads | Active | ~1 mo | Req'd |
| 14 | ▶ In-Q-Tel (IQT) Transformative national security solutions emerge from early-stage private-sector startups developing frontier technologies. IQT identifies, evaluates, and leverages innovations to accelerate government adoption while enhancing commercial success. As of May 2026, IQT is emphasizing mission investing through fewer larger bets in autonomy, contested logistics, critical infrastructure, and technologies that can move to mission use quickly. Washington | $250K – $3M | 30 | Leads | Active | ~1 mo | Open |
| 15 | ▶ Fitch Ventures Fitch Ventures invests in innovative technologies serving institutional credit, risk management, and enterprise clients. The dual mandate focuses on generating financial returns while feeding innovation back into Fitch Group's product stack, often using investments as an M&A pipeline. New York | $2M – $5M | 8 | Both | Active | ~1 mo | Open |
| 16 | ▶ Felicis Ventures Back founders building iconic companies that transcend boundaries. We invest directly in their growth to make them unbreakable. Founded on principle that luck isn't made, it's engineered. Founders are our customer, not LPs. We always vote shares with founders and provide 1% non-dilutive founder development capital alongside every first check. Menlo Park | $500K – $15M | 29 | Both | Active | ~1 wk | Open |
| 17 | ▶ Icehouse Ventures Back exceptional Kiwi founders building globally transformative companies, from day one to IPO. New Zealand founders represent a significantly undervalued asset class, and Icehouse provides capital plus an ecosystem of 3,000+ investors and deep operational support. Auckland | $100K – $10M | 41 | Leads | Active | ~2 mo | Open |
| 18 | ▶ Rosecliff Ventures We seek to create positive economic impact and long-term value by providing lifetime support to companies from seed through late-stage equity and credit. We differentiate through deep Wall Street expertise, strategic LP networks, and innovative financing vehicles. New York | $500K – $10M | 22 | Both | Active | ~2 mo | Open |
| 19 | ▶ Zigg Capital Real estate has been stagnant for 50 years despite massive innovation in other industries. Shifting demographics, transportation changes, and evolving preferences are forcing modernization. We back visionary entrepreneurs building solutions across construction, property management, residential finance, and retail that will improve quality of life, work, and community. New York | $500K – $10M | 26 | Both | Active | ~2 wks | Open |
| 20 | ▶ White Star Capital Technology companies are becoming intertwined with the global economy more so than ever before. The most compelling founders build businesses through a broader world view. White Star Capital backs globally ambitious entrepreneurs at Series A, B, and Seed stages across North America, Europe, and Asia, helping them scale internationally through deep local presence on three continents. London | $1M – $25M | 41 | Leads | Active | ~1 mo | Open |
| 21 | ▶ Deep33 Backs frontier deep tech companies solving physical infrastructure bottlenecks of the AI supercycle, especially compute, energy, quantum, AI infrastructure, robotics, and autonomous manufacturing across the U.S.-Israel corridor. New York | $5M – $15M | 9 | Both | Active | ~1 mo | Open |
| 22 | ▶ Gaingels Equity of access and representation in venture capital delivers positive returns. Diverse and underrepresented (including LGBTQ+) leaders of high-growth companies deserve capital access. When these founders succeed, they influence ecosystems and open doors for historically excluded groups. New York | $200K – $500K | 29 | Follows | Active | ~2 wks | Open |
Investors on this page also frequently invest in these sectors
What other stages do these firms also invest in?
What other sectors do these firms also invest in?
F4 Fund tracks 22 VC firms that actively invest in security & cybersecurity + climate & clean energy at the Series B stage. These firms are ranked using a composite score that weighs data completeness (30%), portfolio depth (30%), investment recency (25%), and stage alignment (15%).
Based on F4's analysis, the median check size for series b security & cybersecurity + climate & clean energy investors is $6M – $6M, with a full range from $100K – $80M. The distribution breaks down as: 1 firms in the <$500K range, 1 firms in the $1M-$2M range, 4 firms in the $2M-$5M range, 9 firms in the $5M-$10M range, 7 firms in the $10M+ range.
Among the 22 firms tracked, 91% lead or co-lead rounds, and 9% typically follow. Founders seeking a lead investor should filter for firms marked "Leads" or "Both" in the rankings table above. Lead investors typically set deal terms and anchor the round.
The best series b security & cybersecurity + climate & clean energy investors combine domain expertise with an active portfolio in the space. Among these firms, 23% prefer warm introductions, and the average firm has 36 portfolio companies. Look for firms whose check size matches your raise, whose stage preference aligns with yours, and who have a track record of supporting companies in your sector through multiple growth phases.
Firm profiles are continuously updated through F4's research pipeline, which combines LLM-powered web research, portfolio analysis, and transcript extraction. The ranking data refreshes every 12 hours. Editorial analysis is reviewed weekly. Individual firm profiles are re-researched on a 30-day cycle or when new information surfaces.