7 VC firms investing in agetech & longevity and climate & clean energy, ranked by portfolio depth and activity.
F4 Fund tracks 7 VC firms that actively invest in agetech & longevity + climate & clean energy, with check sizes ranging from $100K – $5M (median: $875K – $875K). As of June 2026, and 100% lead or co-lead rounds. Rankings are based on F4's proprietary analysis of 1,356+ researched VC firms, scored by data completeness, portfolio depth, investment recency, and stage alignment.
| # | Firm | Check Size | Portfolio | Leads? | Activity | Decision | Intro |
|---|---|---|---|---|---|---|---|
| 1 | ▶ Third Sphere We fundamentally reshape broken global systems by supporting founders who turn theory into action to build better world. Hardware-enabled solutions (80% portfolio) with software components solve transformative climate challenges in energy, infrastructure, transportation, water, and adaptation. We run toward hardware because less competition and less noise. Climate is about more than carbon—it's adaptation, resilience, and systems change. San Francisco | $250K – $3M | 22 | Leads | Active | ~2 mo | Open |
| 2 | ▶ The Helm Women receive only 2% of venture capital despite female-founded startups delivering 2x return per dollar vs. all-male teams. The Helm invests in game-changing, undervalued companies at seed stage founded by women, providing not just capital but operational support and ecosystem access. New York | $250K – $1.5M | 26 | Leads | Active | ~2 wks | Open |
| 3 | ▶ AENU Rewriting the VC rulebook to deliver high returns with high impact. We invest in founders building climate and social impact technologies with intentional, measurable, net-positive outcomes at meaningful scale. | $1M – $4M | 14 | Leads | Active | — | — |
| 4 | ▶ Concrete Rose Capital We invest financial and social capital into exceptional ventures led by visionary, values-aligned teams. Technology is the 'new West' - we seek to broaden opportunities by partnering with pioneering founders to bring entire communities along on their journey of reimagining the world. San Francisco | $100K – $5M | 47 | Both | Active | ~2 mo | Open |
| 5 | ▶ Ada Ventures Backing the best founders, not just the best-connected. We assess founders on their qualities, not CV or past experience. We focus on founders building solutions for climate equity, economic empowerment, and healthy ageing. London | $250K – $1M | 28 | Leads | Active | — | — |
| 6 | ▶ Tundra Ventures We invest in preseed founders with unique insight into untapped markets across three pillars: Wealth, Health, and Resilience. We prioritize BIPOC, women, non-binary, and LGBTQ+ founders solving problems for overlooked end users, bringing accelerator-style guidance and critical network access alongside capital. Minneapolis | $100K – $500K | 13 | Leads | Active | — | Open |
| 7 | ▶ TheoryForge Operator-led fund investing in ambitious founders building transformative AI applications. We partner with technical founders who understand AI/ML deeply and are solving real customer problems with capital efficiency. Great product is always the best marketing. | $200K – $500K | 38 | Both | Active | ~2 wks | Req'd |
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Firms that frequently co-invest with investors on this page
F4 Fund tracks 7 VC firms that actively invest in agetech & longevity + climate & clean energy. 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 agetech & longevity + climate & clean energy investors is $875K – $875K, with a full range from $100K – $5M. The distribution breaks down as: 2 firms in the <$500K range, 2 firms in the $500K-$1M range, 1 firms in the $1M-$2M range, 2 firms in the $2M-$5M range.
Among the 7 firms tracked, 100% lead or co-lead rounds. 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 agetech & longevity + climate & clean energy investors combine domain expertise with an active portfolio in the space. Among these firms, 20% prefer warm introductions, and the average firm has 27 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.