Prelude Ventures

Prelude Ventures Research

Investment Thesis

Prelude Ventures is a climate-focused venture capital firm that invests exclusively in early-stage companies developing frontier technologies for climate change mitigation. Founded in 2009 and based in San Francisco, Prelude manages capital exclusively for Nat and Laura Simons' family philanthropic entities, creating a unique single-LP structure that combines venture returns discipline with climate impact focus. Their fundamental belief: "Climate is everything." The firm backs visionaries accelerating climate innovation that will reshape the global economy while delivering venture-scale returns.

Prelude's approach emphasizes two core principles: "Screen for impact, invest for scale" and "The best ideas come from everywhere." They operate where many venture firms can't or won't, viewing climate entrepreneurship from all angles and supporting diverse opportunities across the entire low-carbon economy.

Investment Strategy and Stage Focus

Prelude Ventures invests early and accepts informed risks through emphasis on venture-level returns combined with deep understanding of frontier technology challenges and markets. The firm focuses on Pre-Seed, Seed, Series A, and Series B stages, with particular concentration in earlier rounds where they can provide foundational support.

Their check size ranges from $100K to $5M, with flexibility to write larger follow-on checks. The firm maintains meaningful reserves for follow-on investments in successful portfolio companies, believing in supporting founders over the long term.

Investment Philosophy

Prelude Ventures differentiates itself through deep technical operating experience combined with climate activism roots. The team has invested continuously through climate tech's challenging periods since 2009, positioning itself as a climate generalist comfortable with:

• High capital intensity
• Long hardware development timelines
• Ambitious, category-defining businesses
• Technologies addressing hard-to-decarbonize industries
• Cross-sector climate solutions

A hard "no fossil fuels" rule firmly rejects any technology making oil, gas, or coal extraction cheaper or longer-lived, providing a clear ethical boundary to their investments.

Portfolio Coverage and Bedrock Sectors

Prelude organizes its investment focus around seven core sector verticals (their "Bedrock"):

1. Built Environment: Infrastructure and materials adapting cities, homes, and offices for the low-carbon future. Companies like LuxWall (vacuum-insulated glass for buildings).

2. Carbon Management: Durable CO2 capture, sequestration, and measurement technologies. Companies like Ebb Carbon, Heirloom Technologies, Living Carbon (enhanced carbon removal), and Vaulted Deep (biomass carbon removal and storage).

3. Compute: Advanced software and hardware solving climate change's hardest problems. Companies like Atom Computing (quantum computers for materials science), Citrine Informatics (AI materials discovery), Xcimer (laser fusion), Quaise (deep drilling for geothermal).

4. Energy: Optimizing energy supply/demand and advancing grid infrastructure with clean power and storage. Portfolio includes Form Energy (long-duration battery storage), Fervo Energy (geothermal), Terabase Energy (Direct Air Capture), Electric Hydrogen, and Voltus (demand response).

5. Food & Agriculture: Lowering greenhouse gas emissions through plant-based alternatives, smart-farming, and food waste management. Investments in Pivot Bio (nitrogen-fixing biologics), Rumin8 (enteric methane reduction), CoverCress (cover crops, acquired by Bayer), and Ripple Foods (plant-based dairy).

6. Manufacturing & Industrials: Hardware, software, and processes driving emissions reductions in hard-to-decarbonize industries. Boston Metal (steelmaking without carbon), Brightband (industrial heat), and others.

7. Mobility: Minimizing carbon emissions for transport. Portfolio includes Pyka (electric aircraft), Unspun (electric vehicles), and Lime (micro-mobility). Invested in Planet (earth-imaging satellites) for climate monitoring.

Team and Leadership

Founders & Structure: Nat Simons and Laura Baxter-Simons co-founded Prelude Ventures in 2009 after establishing Sea Change Foundation (2006) to focus on climate philanthropy. They previously worked together at Renaissance Technologies (Jim Simons' quantitative hedge fund) and Meritage Group LP. Their unique structure—managing capital exclusively for their family philanthropic entities—provides strategic flexibility, long-term perspective, and alignment with impact goals. Both are UC Berkeley alumni; Laura is a Stanford Law graduate. They joined the Giving Pledge in 2017.

Managing Directors:

1. Mark Cupta (Managing Director, joined 2013): Invests in emerging technologies applied to energy and resource-intensive industries. Background: Chemical and biomolecular engineering from Georgia Tech, MBA from Stanford. Held technical and commercial roles at Celanese Corporation (Fortune 500), Terawatt Ventures (Chevron solar team), and Novomer (sustainable chemistry startup). Led investments in advanced materials, microelectronics, and chemicals.

2. Matt Eggers (Managing Director, joined 2023): Former Genentech executive (led commercial launch of breakthrough cancer drug), then 15 years in climatetech operations and product leadership at Sunrun, Bloom Energy, and Tesla. Grew Sunrun from 30 employees to 1,200+ with 55,000+ installations while managing $300M equity raises. Previously invested at Breakthrough Energy Ventures in grid, aerospace, buildings, and SaaS sectors. Duke BS in molecular biology, Stanford MBA.

3. Gabriel Kra (Managing Director, co-founder 2013): 25+ years as investor, entrepreneur, scientist, activist. Previously investment banker at Deutsche Bank (solar and semiconductor groups), early employee at venture-backed telecommunications and semiconductors startups. Lifelong climate commitment from early experience at Yellowstone National Park and Greenpeace. Holds MBAs from Columbia and UC Berkeley, MS in atmospheric chemistry from SUNY Stony Brook, BA in philosophy from Columbia College. Board director for Activate, CREO Syndicate; advisory board for Carbon180.

4. Tim Woodward (Managing Director, joined 2013): 30+ years in venture capital focused on energy, industrial, and environmental technologies. Silicon Valley native. Previously Managing Director for 15 years at Nth Power, leading investments in renewable energy, demand response, advanced materials, and outsourced utility management. Led successful investments in Evergreen Solar (ESLR), Comverge (COMV), and Proton Energy Systems (DESC).

Notable Portfolio Companies and Exits

Recent Active Investments (2025):

• Ripple (plant-based dairy, December 2025)
• Form Energy (long-duration battery storage, actively scaling)
• Fervo Energy (geothermal, public markets discussion)
• Atom Computing (quantum computing with neutral atoms)
• Boston Metal (emission-free steelmaking)
• Xcimer (laser fusion energy)

Notable Exits:

• Planet (earth-imaging satellites, IPO)
• QuantumScape (solid-state batteries, IPO)
• Zymergen (bioengineered materials, acquired and spun to Ginkgo Bioworks, IPO)
• ClearMetal (logistics, acquired by project44)
• Raxium (MicroLED displays, acquired by Google)
• CoverCress (cover crop biologics, acquired by Bayer)
• Sense Photonics (flash LiDAR, acquired by Ouster)
• SolarBridge Technologies (microinverters, acquired by SunPower)
• PLANT PV (photovoltaic materials, acquired by Hitachi Chemical)
• EnergySavvy (now Uplight, utility software)

Geographic Focus

Primarily United States-based, with particular concentration in:

• San Francisco Bay Area (headquarters and operations hub)
• California (solar, battery, cleantech clusters)
• East Coast (biotech, advanced materials)
• Selective international investments where climate innovation hubs exist

Recent Activity and Fund Status

Prelude Ventures is actively deploying capital with recent investments through 2025. December 2025 investment in Ripple confirms ongoing deployment. The firm invests across pre-seed to Series B stages, with demonstrated follow-on capacity.

Based on portfolio analysis spanning 80+ companies, the firm has:

• Sustained early-stage investing discipline since 2009
• Strong track record of successful exits and IPOs
• Active reinvestment of proceeds into new opportunities
• Demonstrated ability to support companies through challenging climate tech development timelines

Decision Process and Founder Partnerships

Prelude emphasizes partnership and trust as core to success: "We invest early and have the capital to support for the long term." The team's deep technical expertise allows for substantive engagement with technical founders.

Investors are thesis-driven subject matter experts who partner with founders, other investors, and industry leaders. The decision process involves partnership-level discussions with demonstrated technical knowledge in specific sectors.

Competitive Positioning

Prelude Ventures occupies a unique position in climate venture capital:

• Single-LP structure enables long-term patience and climate-first decision-making
• Deep sector expertise across seven verticals with technical founders as managing directors
• Continuous investing through climate tech's challenging periods (2009-present)
• Hardware comfort in high-capital-intensity, long-timeline businesses
• Scale orientation balancing impact screening with venture returns discipline
• NO fossil fuels hard line as ethical boundary

Anti-Thesis

Prelude explicitly avoids technologies:

• That make fossil fuel extraction cheaper or longer-lived
• That serve primarily developed-world consumption without addressing emissions
• Pure infrastructure plays without technology innovation
• Consumer plays without systemic emissions impact

Founder Preferences

Prelude seeks entrepreneurs and founders with:

• Technical depth in their climate domain
• Willingness to tackle hard, capital-intensive problems
• Commitment to sustainable, profitable business models
• Vision for category-defining companies
• Operating experience (preferred in executive teams)
• Long-term conviction about climate solutions

The firm particularly values founders from climatetech adjacencies (energy, materials science, agriculture, advanced manufacturing) who understand both technical and market constraints.