Top 15 Climate Tech Investors Actively Writing Checks (2026)
Co-founder at Peony. Former M&A at Nomura, early-stage VC at Backed VC, and growth-equity / secondaries investor at Target Global. I write about investors, fundraising, and deal advisors from the deal-side perspective I spent years in.
Last updated: August 2026
Climate tech raised $40.5 billion globally in 2025 — up 8% from the year before — but on 18% fewer deals. The market has shifted decisively toward bigger checks, later stages, and companies with real revenue or clear paths to it. If you're a climate founder raising capital right now, the money is there, but the bar is higher than it's ever been.
I've tracked these funds through their recent closes, portfolio announcements, and LP disclosures. Below are the 15 climate tech investors most actively writing checks, with enough context on each to help you figure out who's actually a fit — not just who has a climate page on their website.
What Does the Climate Funding Market Look Like Right Now?
A few numbers worth knowing before you start targeting investors:
- $40.5B deployed globally in climate tech VC in 2025, up from ~$37.5B in 2024 (Sightline Climate)
- Deal count fell 18% to 1,545 — the lowest since 2020. Fewer bets, bigger conviction (Sightline Climate)
- Growth-stage investment surged 78% while seed fell 20% and Series A deal counts dropped 22%; Series C investment fell 32% to an all-time-low deal count — the new "valley of death"
- The AI-energy nexus is the dominant theme: energy took 36% of all climate funding ($14.4B, +31%), nuclear and fusion alone captured 44% of energy funding, distributed energy and storage another 24%, and built-environment funding rose 23% — all pulled by data-center power demand
- Google acquired Intersect Power for $4.75B in December 2025 — the year's largest climate-adjacent deal, driven by data-center energy needs (Alphabet IR)
- Fervo Energy went public on May 13, 2026 (Nasdaq: FRVO) at $27/share, raising ~$2.2B — the largest climate-tech IPO of 2026, it popped 33% on day one to a $10B+ valuation (TechCrunch)
- The One Big Beautiful Bill Act (signed July 4, 2025) accelerated the phase-out of wind and solar credits (projects must start construction before July 5, 2026) — but geothermal, storage, hydro, and nuclear keep their credits until after 2033, which is exactly why the money concentrated there (Kirkland & Ellis)
- Two regional stories, don't conflate them: US climate-tech deployment actually rose 27% in 2025 and led the world — but US managers took just 16% of new climate fund capital raised, versus Europe's 54% (Sightline Climate)
The bottom line: capital is concentrating. If you're pre-revenue and science-stage, your fundraise just got harder. If you've got unit economics and customer traction, this is actually a good market.
How Do You Pick the Right Climate Investor?
Not all climate VCs are interchangeable. Match your fundraise to the right investor profile:
If you need strategic distribution and utility access: Look for investors with strategic LPs in the energy value chain. Energy Impact Partners and S2G both have this — their LPs can become your first customers.
If you're building first-of-a-kind hardware: You need investors comfortable with project finance timelines and follow-on capital. Galvanize's credit strategy and the All Aboard Coalition (more on this below) are designed exactly for this gap.
If you're pre-seed or seed with deep-tech risk: Congruent, Clean Energy Ventures, Prelude, and Lowercarbon all stay active at formation stage. They understand that climate companies take longer to prove out than software.
If you'll scale in Europe: World Fund, Systemiq Capital, Planet A, Extantia, and Kiko Ventures bring EU regulatory fluency, policy relationships, and on-the-ground networks that U.S.-based funds typically can't replicate.
One filter that saves time: Prioritize funds that closed new vehicles or led rounds in the last 12 months. If a firm's last lead was in 2023, they may be fully deployed or between funds. You'll see recency signals for each firm below.
15 Climate Tech Investors Actively Deploying Capital
1. Breakthrough Energy Ventures (BEV)
Website: breakthroughenergy.org Focus: Science-driven decarbonization across five grand challenges — electricity, manufacturing, agriculture, transportation, buildings Stage: Early through growth | AUM: $3.5B+ across three venture funds
What's new: BEV launched a Sustainable Aviation Fuel fund with oneworld member airlines in September 2025, with $150M in initial commitments (American Airlines Newsroom). Important distinction worth noting: Breakthrough Energy Catalyst (the project-finance arm) halted new investments in February 2026 and laid off staff (Axios), but the venture arm (BEV) is separate and continues operating.
How to approach: Show potential to mitigate ≥0.5 GtCO₂e and a credible FOAK-to-scale plan. BEV wants transformative science with a clear commercialization pathway.
2. Energy Impact Partners (EIP)
Website: energyimpactpartners.com Focus: Energy transition software, hardware, and services — with strategic utility LPs who can become customers Stage: Multi-stage | AUM: $4.5B+
What's new: Closed Flagship Fund III at $1.36B in October 2025, 40% larger than its predecessor. Total AUM now exceeds $4.5B. EIP's LP base includes major utilities across the power value chain, making them uniquely positioned to help portfolio companies find first customers. (BusinessWire)
How to approach: Lead with utility-grade reliability, interoperability, and a pathway to enterprise-scale deployments. If your solution needs utility adoption to succeed, EIP is a top-tier match.
3. Galvanize Climate Solutions
Website: galvanizeclimate.com Focus: Multi-asset climate platform spanning venture, growth, and credit Stage: All stages including project finance
What's new: Announced a $1.3B Credit & Capital Solutions strategy in September 2025 to finance electrification, efficiency, renewable manufacturing, and grid/storage projects. This is one of the few climate firms that can bridge venture equity and infrastructure-grade credit under one roof. (Leadership note: co-founder Tom Steyer stepped back to run for California governor; Katie Hall is now CEO alongside Co-Chair John Kerry, and the firm continues operating normally.) (PR Newswire)
How to approach: Best for companies with clear asset-level revenue and FOAK/NOAK project milestones. If you need both equity and debt, Galvanize can structure both sides.
4. Just Climate (Generation Investment Management)
Website: justclimate.com Focus: High-abatement solutions across industry, nature, and infrastructure Stage: Growth
What's new: Led NatureMetrics' Series B, and its Natural Climate Solutions strategy — which opened with $175M from Microsoft and CalSTRS — reached $375M by late 2025 with Achmea, the Environment Agency Pension Fund, and RBC joining the roster (Just Climate). Just Climate is Generation IM's dedicated climate growth vehicle with patient capital and deep institutional backing. (Just Climate)
How to approach: Quantify abatement potential and durability. Bring procurement contracts or policy tailwinds. Just Climate wants measurable impact alongside commercial viability — not one or the other.
5. Lowercarbon Capital
Website: lowercarbon.com Focus: Broad — carbon removal, fusion, novel processes, and "boring but huge" decarbonization wins Stage: Early to growth | AUM: ~$2.4B
What's new: Raising a dedicated second fusion fund (reported November 2025, larger than the original ~$250M 2022 vehicle) and joined Focused Energy's ~$240M Series A — the largest fully secured Series A in global fusion (July 2026). Also led Earthmover's $7.2M seed (climate data infrastructure). Lowercarbon is one of the few climate VCs willing to back genuinely audacious science bets alongside practical efficiency plays. (Earthmover)
How to approach: Be audacious but cost-anchored. Show the step-change versus incumbents. Lowercarbon respects conviction and contrarian thinking — they'd rather fund something wild with real physics than something safe with incremental improvement.
6. Congruent Ventures
Website: congruentvc.com Focus: Seed and Series A across mobility, energy, materials, carbon, agriculture, and the built world Stage: Early
What's new: Published their 2025 "50 by 2050" analysis on climate capital flows and a January 2026 outlook on resilience and adaptation, while maintaining active deployment — including leading Cloneable's $4.6M seed (agentic AI for infrastructure operations). Congruent was also a founding member of the All Aboard Coalition. (Congruent Ventures)
How to approach: Tight wedge with clear LCOE/opex math and a unit-economic pathway to scale. Congruent likes founders who can articulate the specific cost curve that makes their technology win.
7. Clean Energy Ventures (CEV)
Website: cleanenergyventures.com Focus: Seed and Series A with a science-based 2.5 Gt mitigation target by 2050 Stage: Early
What's new: Closed Fund II at $305M in 2024 and has been actively deploying throughout 2025. CEV is another founding member of the All Aboard Coalition, and their impact methodology is among the most rigorous in climate VC — they'll calculate your abatement potential independently. (Clean Energy Ventures)
How to approach: Quantify impact with LCAs and cost curves. Show manufacturability and supply chain realism. CEV will run their own assessment, so come prepared with the underlying data.
8. Prelude Ventures
Website: preludeventures.com Focus: Early-stage climate spanning energy, carbon management, the built world, compute, and mobility Stage: Early
What's new: Portfolio company Fervo Energy went public on Nasdaq in May 2026 (FRVO, ~$2.2B raised, $10B+ valuation) — a landmark exit validating Prelude's early bet on next-gen geothermal. Prelude also backed Quaise Energy's Series B (June 2026, deep geothermal drilling), and Form Energy and Terabase continue to scale. Prelude is a founding All Aboard Coalition member. (Prelude Ventures)
How to approach: Strong technical team paired with crisp go-to-market targeting utilities, EPCs, or OEMs. Prelude values deep technical differentiation plus practical commercialization plans.
9. S2G Investments (formerly S2G Ventures)
Website: s2ginvestments.com Focus: Energy, oceans, and agriculture/food decarbonization Stage: Venture to growth | AUM: $2.8B
What's new: Closed the $1B Solutions Fund I in May 2026 — its largest fund ever, aimed at growth-stage "missing middle" companies (BusinessWire). S2G rebranded from S2G Ventures in January 2025 and has operated as an independent registered investment adviser since May 2024 — Builders Vision is heritage, not parent. S2G invests at the "seams" between sectors, which means interdisciplinary solutions that touch food-energy-water nexus points tend to resonate. (New Private Markets)
How to approach: Systems-level story with practical customer pull and channel partners. Show how your solution connects across value chains rather than optimizing within a single silo.
10. World Fund (Europe)
Website: worldfund.vc Focus: Europe-focused climate VC using a science-based "Climate Performance Potential" methodology Stage: Seed through growth
What's new: Closed first fund at €300M in 2024 — the largest dedicated European climate VC fund — and is fundraising for Fund II targeting €500M+. World Fund runs in-house CPP assessments that quantify the maximum CO₂ reduction potential of each investment. (TechCrunch, Impact Investor)
How to approach: Tie your LCA and abatement math to European industrial policy and end-market buyers. World Fund will run their own CPP assessment, so bring strong underlying data.
11. Systemiq Capital
Website: systemiqcapital.earth Focus: Early-stage climate tech across materials, industry, food, nature, and mobility Stage: Early
What's new: Fund II had its first close at $70M back in July 2022 (targeting $200M; no final close announced) — but deployment is genuinely current: five investments in 2025 and two more in 2026, including Cable's pre-seed (May 2026) and Subbyx (March 2026). Active platform content on technology tipping points and systems-change investing continues. Systemiq's parent consultancy gives them unusually deep expertise in industrial systems and policy dynamics. (Systemiq Capital)
How to approach: Evidence-heavy roadmaps and policy-aware commercialization. Show that you understand the system your technology plugs into, not just the technology itself.
12. Planet A Ventures (Europe)
Website: planet-a.com Focus: Early-stage European green tech with an in-house LCA team Stage: Early
What's new: Deploying from its €160M Fund I (closed February 2023, 60% above target) — ten deals in 2025 and a January 2026 investment in one•five (sustainable packaging) — with their distinctive approach intact: Planet A conducts independent lifecycle assessments of every potential investment before committing. If your impact story doesn't survive scrutiny, they'll find out during diligence — not after. (Climate Ventures CO₂)
How to approach: Lead with LCAs, end-to-end supply chain analysis, and EU regulatory fit. Planet A's in-house science team is a genuine differentiator among early-stage climate funds.
13. Blue Bear Capital
Website: bluebearcap.com Focus: AI and data software for energy, infrastructure, and climate Stage: Early growth
What's new: Closed Fund III at $160M in late 2024 to back AI founders solving energy and industrial problems. Blue Bear sits squarely at the intersection of the two hottest investment themes: AI and energy infrastructure. (Latitude Media)
How to approach: Software-led value creation — yield improvement, uptime optimization, O&M cost reduction — with quick payback periods. Blue Bear wants AI companies solving real energy problems, not climate-washed AI.
14. Extantia Capital (Europe)
Website: extantia.com Focus: EU deep-tech decarbonization — hydrogen, advanced materials, circularity Stage: Early
What's new: Closed its €204M flagship fund in November 2024 (Article 9, oversubscribed) and is deploying fast — 11 deals in 2025 and four more in 2026 so far, including Epoch Biodesign and Renasens' $12M seed (both March 2026). Extantia is building a strong position in European industrial decarbonization, backing founders working on hard chemistry and materials science problems. (Tech Funding News)
How to approach: Big abatement potential plus realistic scale economics. Expect rigorous technical diligence — Extantia's team has deep materials science and engineering backgrounds.
15. Kiko Ventures (IP Group)
Website: kiko.vc Focus: Evergreen cleantech platform backed by FTSE-listed IP Group; lab to commercial scale Stage: All stages with patient capital
What's new: The honest read: Kiko is the slowest deployer on this list — roughly 14 portfolio companies and no new investments announced in 2026 so far. That is partly the model: the evergreen, balance-sheet-funded structure (IP Group committed ~$245M over five years) means no fund-timeline pressure and genuinely patient capital for hard-tech timelines that don't fit a 10-year fund — but do not expect a fast-moving lead here. (Global Venturing)
How to approach: Science-heavy teams with defensible IP and realistic but long time horizons. Kiko is a strong fit for university spinouts and deep-science companies that need a capital partner willing to wait.
Notable trend: coalition investing is rising. In September 2025, fourteen climate VC firms — including Breakthrough Energy, Khosla Ventures, DCVC, Clean Energy Ventures, Congruent, EIP, and Prelude — launched the All Aboard Coalition with a "missing middle" fund that targeted $300M and reached final close at $133M in 2026; the coalition itself has since grown to 20 member firms (ESG Today). The goal: bridge the gap between venture and infrastructure capital for companies too big for seed rounds but too early for project finance. If your company sits in that awkward middle, this coalition is worth targeting directly. (ESG Today)
How Do You Pitch Climate Investors? Five Practical Tips
1. Lead with Unit Economics, Not Mission
Put today's cost and your projected Series-next cost on one slide with clear learning-rate assumptions. For fuels, materials, or power: show where you beat the incumbent on delivered cost or reliability — and when. This is the single biggest filter across every firm above.
2. Show Bankability Early
Even at seed, bring customer intent (LOIs, MOUs), offtake frameworks, interconnection or permitting status, and your path to project finance. This de-risks FOAK and signals that you understand the capital stack beyond venture.
3. Make Policy a Tailwind, Not a Crutch
Map your exposure to the IRA phase-out timeline under the One Big Beautiful Bill Act, CBAM, EU ETS, local content rules, and grid incentives — and show how you're resilient across policy scenarios. After the OBBBA accelerated most clean energy credit phase-outs, investors are increasingly wary of pure subsidy dependency.
4. Pilot Design Matters More Than Pilot Hype
Name the site host, define success criteria, specify what data you'll publish, and show the step from pilot to NOAK plant. Investors want pilots that look like products, not science fairs.
5. Be Supply-Chain Serious
Who supplies your critical materials? Where's your offtake? What's your QA/QC plan? Pair this with a crisp LCA summary if you sell on impact — especially important for EU-focused funds like Planet A and World Fund that will verify your numbers independently.
How Should You Organize Your Climate Tech Fundraise?
Climate tech fundraising means sharing documentation that's often genuinely sensitive — lifecycle assessments, proprietary engineering data, pilot results, supply chain details. A disorganized or insecure setup costs you time and credibility with the investors above.
Peony — the data room platform 6,800+ customers use — provides AI-powered rooms built for this: automatic document organization, page-level analytics to see which investors engage deeply with your materials versus which ones skim, and enterprise-grade security (dynamic watermarks, screenshot protection, access revocation) to protect your IP throughout the process.
Track which VCs spend time on your unit economics versus your team slide, identify your hottest leads before they go cold, and follow up at the right moment. For the full folder structure climate investors expect to find, see the investor data room guide.
Set up your climate tech data room →