7 VC firms investing in security & cybersecurity and climate & clean energy at the Growth stage.
F4 Fund tracks 7 VC firms that actively invest in security & cybersecurity + climate & clean energy at the Growth stage, with check sizes ranging from $200K – $40M (median: $6M – $6M). As of June 2026, and 71% lead or co-lead rounds. Rankings are based on F4's proprietary analysis of 1,362+ 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 | ▶ Northzone Category-defining entrepreneurs building fundamental shifts that upend entire industries. Focus on disruptive business models in energy transition, healthcare, AI, and consumer. Thesis values human relationships and founder-centric partnerships over financial metrics alone. London | $1M – $40M | 39 | Leads | Active | ~2 wks | Req'd |
| 3 | ▶ 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 |
| 4 | ▶ 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 |
| 5 | ▶ 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 |
| 6 | ▶ 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 |
| 7 | ▶ 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 |
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What other sectors do these firms also invest in?
Firms that frequently co-invest with investors on this page
F4 Fund tracks 7 VC firms that actively invest in security & cybersecurity + climate & clean energy at the Growth 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 growth security & cybersecurity + climate & clean energy investors is $6M – $6M, with a full range from $200K – $40M. The distribution breaks down as: 1 firms in the <$500K range, 1 firms in the $2M-$5M range, 2 firms in the $5M-$10M range, 3 firms in the $10M+ range.
Among the 7 firms tracked, 71% lead or co-lead rounds, and 29% 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 growth security & cybersecurity + climate & clean energy investors combine domain expertise with an active portfolio in the space. Among these firms, 43% prefer warm introductions, and the average firm has 37 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.