F4 Champions · Season 1
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Join the open accelerator where your standing changes with what you ship. Enrollment closes August 2.
F4 Champions · Season 1
You're researching investors. We want to see what you're building.
Join the open accelerator where your standing changes with what you ship. Enrollment closes August 2.
35 VC firms investing in security & cybersecurity and aerospace & defense at the Series B stage.
F4 Fund tracks 35 VC firms that actively invest in security & cybersecurity + aerospace & defense at the Series B stage, with check sizes ranging from $100K – $500M (median: $8.5M – $8.5M). As of August 2026, and 91% lead or co-lead rounds. Rankings are based on F4's proprietary analysis of 1,556+ researched VC firms, scored by data completeness, portfolio depth, investment recency, and stage alignment.
| # | Firm | Check Size | Portfolio | Leads? | Activity | Decision | Intro |
|---|---|---|---|---|---|---|---|
| 1 | ▶ SYN Ventures Cybersecurity needs constant innovation to stay ahead of adversaries. SYN invests in transformational (not incremental) solutions that significantly reduce technology risk — from the earliest stages through Series B — leveraging a team of former Fortune 500 CISOs, CEOs, and founders with 400+ combined years of security experience. West Palm Beach, FL | $1M – $30M | 40 | Leads | Active | N/A | N/A |
| 2 | ▶ Point72 Ventures Point72 Ventures backs ambitious founders building for big outcomes across critical domains. Going deep, not wide—the firm focuses on specialized investment theses in AI, Consumer, and Defense Tech, bringing deep sector insights, partnership, and hands-on support from seed to pre-IPO. New York | $250K – $50M | 204 | Both | Active | ~2 wks | Req'd |
| 3 | ▶ Digital Transformation Capital Partners DTCP is a multi-strategy sector specialist with €4.5bn AUM across digital infrastructure (data centers, mobile towers, fiber networks), enterprise SaaS (Series B+, $3M-$100M ARR, $5M-$50M checks), and European defence/dual-use technology. Founded in 2015 from Deutsche Telekom's M&A office; anchor LPs include Deutsche Telekom and SoftBank. Uses proprietary Flightpath data model (40+ SaaS KPIs) for Growth investments. Hamburg | $5M – $50M | 40 | Leads | Active | N/A | N/A |
| 4 | ▶ Elad Gil Invest in market-creating companies with exceptional founders and large addressable markets. Prioritize market size and dynamics, then evaluate product-market fit through personal usage test. Focus on founder quality and execution capability over other factors. San Francisco | $250K – $50M | 39 | Leads | Active | ~2 wks | Open |
| 5 | ▶ 137 Ventures 137 Ventures provides structured liquidity — equity loans against shareholder stakes, direct secondary purchases, and anchoring company-organized tender offers — to the founders, executives, and early employees of category-defining private technology companies. The firm supports generational companies through decade-long private lifecycles with flexible, founder-friendly capital structures. San Francisco | $25M – $150M | 56 | Both | Active | N/A | N/A |
| 6 | ▶ Lightspeed Venture Partners We partner with bold builders of category-defining companies from Seed to Series F and beyond. Depth of commitment, depth of relationships, and depth of belief distinguish us. Complete immersion, authentic partnership, and unwavering conviction through market cycles. | $1M – $300M | 51 | Leads | Active | ~2 wks | Open |
| 7 | ▶ Accel Partner with exceptional teams building transformative technology companies across all stages San Francisco | $2M – $10M | 127 | Both | Active | N/A | N/A |
| 8 | ▶ Tribe Capital Apply AI and data science to identify and invest in N-of-1 companies with 10-100x potential. Back founders who expand individual freedom and decentralize power. Invest in companies that embody principles from the Bill of Rights (voice, fair process, proportionality, user power) and Bitcoin whitepaper (trust-minimized, verifiable, aligned incentives, open access). Menlo Park | $500K – $5M | 60 | Leads | Active | ~1 wk | Open |
| 9 | ▶ Geodesic Capital We invest in multi-stage, globally minded founders and help them succeed in the critical Japanese market. Geodesic bridges Silicon Valley and Japan, providing both financial capital and an unmatched operational platform — including the annual Geodesic Forum, a dedicated Japan team, and deep LP relationships with major Japanese corporations — to accelerate portfolio company growth into Japan and Asia. Silicon Valley | $5M – $50M | 75 | Both | Active | N/A | N/A |
| 10 | ▶ General Catalyst We back founders venturing beyond to build transformational companies that create positive, enduring change. Applied AI and global resilience are fundamental forces reshaping industries. | $2M – $50M | 38 | Leads | Active | N/A | N/A |
| 11 | ▶ Centre Street Partners Partner with technical operators and SMB owners to execute technology-led middle-market buyouts. Capture outsized economic value from AI at the ownership layer of services providers rather than pure-play tech. New York | $5M – $50M | 24 | Leads | Active | ~1 mo | Req'd |
| 12 | ▶ Lockheed Martin Ventures Invest in companies developing disruptive technologies in core defense business areas to build a pipeline that strengthens the defense industrial base. Over 60 portfolio companies have become Lockheed Martin suppliers, receiving $750M+ in contracts. Bethesda, MD | $500K – $5M | 32 | Both | Active | 3+ mo | Req'd |
| 13 | ▶ Sands Capital Long-term, concentrated investment in high-quality innovative growth businesses across public equity, venture capital, and growth equity. Applies six investment criteria universally: sustainable above-average earnings growth, leadership in a promising business space, significant competitive advantages, clear mission, financial strength, and rational valuation. Integrates public and private market insights for superior sourcing and diligence. Arlington, VA | $10M – $150M | 40 | Leads | Active | ~2 mo | Req'd |
| 14 | ▶ Entrepreneur First It matters not only which companies get started, but who starts them. EF identifies exceptional individual talent before a company, co-founder, or idea exists, and builds the company from Day Zero through cohort-based co-founder matching, an equity-free grant phase, and up to $250K in formation capital (via SAFE) once a team passes its Investment Committee. London | $250K – $5M | 78 | Leads | Active | N/A | Open |
| 15 | ▶ NATO Innovation Fund NIF invests in cutting-edge science and engineering startups that strengthen the defence, security, and resilience of NATO Allied nations. Backed by 24 sovereign governments, NIF provides deep tech founders with unprecedented access to government procurement markets across 24 countries, connectivity to ~90 NATO-affiliated test centres, and 6,000+ Allied scientists. NIF leads initial investments with up to €15M and maintains substantial follow-on reserves. Amsterdam | $1M – $16.5M | 26 | Leads | Active | 3+ mo | Open |
| 16 | ▶ 9Yards Capital Back technical founders building critical infrastructure for foundational industries. Pair growth-stage capital with deep regulatory expertise and government/industry connectivity to create defensible advantages in overlooked, essential sectors. San Francisco | $3M – $10M | 34 | Both | Active | ~2 wks | Open |
| 17 | ▶ 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 |
| 18 | ▶ Shasta Ventures Exceptional founders with clear technical solutions to enterprise market pain points, focused on SaaS, cybersecurity, infrastructure, data intelligence, and computer vision. We provide capital plus operational excellence through Shasta Elevate playbooks. Menlo Park | $2M – $15M | 23 | Leads | Active | ~2 mo | Open |
| 19 | ▶ 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 |
| 20 | ▶ K5 Global K5 Global backs category-defining companies from inception to IPO. The firm leverages exceptional networks across media, entertainment, politics, finance, and technology to provide strategic value beyond capital. We believe the best companies are built by founders who can access world-class talent, capital, and strategic relationships. Los Angeles | $1M – $3M | 34 | Leads | Active | ~1 mo | Open |
| 21 | ▶ 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 |
| 22 | ▶ Human Capital Partner with exceptional founders to build generational companies that define the world's most critical industries. We provide not just capital but assemble teams of the highest caliber through our 5,000+ member builder community and deep operational expertise. San Francisco | $250K – $200M | 25 | Both | Active | ~1 wk | Open |
| 23 | ▶ IVP We supercharge growth in breakout companies, converting momentum into market dominance. We invest exclusively at Series B and beyond in companies that have achieved product-market fit and are ready to scale from millions to hundreds of millions in revenue. San Francisco | $1M – $25M | 31 | Leads | Active | ~2 mo | Req'd |
| 24 | ▶ Swisscom Ventures Invest in digital technologies that disrupt specific verticals, targeting exceptional founding teams with category-leader potential. Focus on Swiss university spin-offs and companies leveraging Telco, DeepTech, Cybersecurity, Fintech, and AI. Provide not just capital but access to Swisscom's enterprise infrastructure and customer channels. Zurich | $1M – $20M | 30 | Both | Active | ~1 mo | N/A |
| 25 | ▶ 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 |
| 26 | ▶ 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 |
| 27 | ▶ Battery Ventures Battery Ventures operates as a stage-agnostic firm backing technology-driven category leaders across all growth stages from seed to buyout. The firm believes the best tech investments span the entire founder journey, and they practice collaborative, research-focused investing with embedded operational support through their Portfolio Services platform. They seek technical founders with deep domain expertise and experienced operators building in four core sectors: Application Software, Infrastructure Software, Consumer, and Industrial Tech + Life Science Tools. Boston | $1M – $500M | 23 | Both | Active | ~2 wks | Open |
| 28 | ▶ HOF Capital HOF Capital invests in relentlessly ambitious founders building world-changing technologies that accelerate abundance: sustained technological progress that expands access to opportunity, health, and economic prosperity. Its current public thesis emphasizes AI and agentic systems as amplifiers of discovery, engineering, and knowledge creation, alongside frontier infrastructure and applications that can shorten scientific and technological invention timelines. New York | $500K – $10M | 29 | Both | Active | ~2 wks | Req'd |
| 29 | ▶ Rosecliff Ventures Rosecliff's Frontier Technology Thesis focuses on AI, aerospace, defense, energy resilience, and space infrastructure. New York | $500K – $10M | 23 | Both | Active | ~2 mo | Open |
| 30 | ▶ CDP Venture Capital CDP Venture Capital is a national venture platform that combines direct investing, fund-of-funds activity, accelerators, and technology transfer to strengthen Italy's innovation economy in strategic sectors. Rome | $250K – $10M | 14 | Both | Active | N/A | N/A |
| 31 | ▶ Main Sequence Main Sequence backs deep tech founders solving humanity-scale problems, especially companies connected to publicly funded research and spinouts that can turn breakthrough science into global businesses. Eveleigh, NSW, Australia | $250K – $500K | 14 | Leads | Active | ~1 mo | N/A |
| 32 | ▶ Tiger Global Management Leading global companies that leverage technological innovation across public and private markets. Proven founders (especially ex-Googlers, AWS, Stripe) with large TAMs (billions+), product-led growth, and global ambitions. Conviction-based investing post-2022 correction emphasizing quality over quantity. New York | $1M – $100M | 23 | Leads | Active | ~1 wk | Req'd |
| 33 | ▶ 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 |
| 34 | ▶ 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 |
| 35 | ▶ Flucas Ventures Democratize access to venture capital by building large syndicates of non-traditional LPs. Invest across all stages, sectors, and geographies based on founder quality and market conviction, not category restrictions. Enable 2,000+ diverse co-investors to participate alongside marquee firms like Sequoia and Andreessen Horowitz while maintaining founder-friendly economics. Miami | $250K – $5M | 17 | Follows | Active | ~1 wk | Req'd |
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 35 VC firms that actively invest in security & cybersecurity + aerospace & defense 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 + aerospace & defense investors is $8.5M – $8.5M, with a full range from $100K – $500M. The distribution breaks down as: 2 firms in the <$500K range, 1 firms in the $1M-$2M range, 6 firms in the $2M-$5M range, 10 firms in the $5M-$10M range, 16 firms in the $10M+ range.
Among the 35 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 + aerospace & defense investors combine domain expertise with an active portfolio in the space. Among these firms, 31% prefer warm introductions, and the average firm has 43 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.