My Climate Journey Collective (MCJ) Research
Investment Thesis
MCJ Collective is a climate-focused venture capital fund dedicated to backing extraordinary founders leading the transition of energy and industry while solving the inevitable impacts of climate change. The firm discovers and invests in startups rewriting industries to be cleaner, more profitable, and more resilient. MCJ's thesis centers on accelerating the necessary industrial and energy transition through strategic venture capital deployment, paired with deep ecosystem engagement through media, community, and talent initiatives.
Sector Focus
MCJ invests across the full spectrum of climate and clean energy sectors:
Energy Transition: Nuclear and advanced nuclear, renewable energy (solar, wind, geothermal), energy storage and batteries, hydrogen, grid modernization and electrification
Industrial Decarbonization: Carbon capture/utilization/removal, industrial process decarbonization, synthetic biology, novel materials, manufacturing improvements
Climate Adaptation & Resilience: Climate risk management, wildfire suppression, water and resource management, infrastructure resilience
Mobility & Transportation: Electric vehicles, charging infrastructure, low-carbon shipping, sustainable aviation fuels, micromobility
Resource Efficiency & Circularity: Waste reduction, recycling, circular economy, sustainable food systems, resource optimization
Infrastructure & Built Environment: Building electrification, heat pumps, carbon accounting software, smart buildings, sustainable materials
Stage & Check Size
MCJ operates as a seed-stage to early Series A investor with:
- Primary Stage Focus: Seed to early Series A
- Check Size: $500K - $3M typical
- Fund Size: $115M+ AUM across two funds (Fund II: $80.6M, closed September 2024)
- Deployment Rate: 21 investments in 2025 ($15M+ deployed), showing active deployment from Fund II
Lead Tendency & Investment Style
MCJ demonstrates strong lead tendency, actively leading or co-leading seed and early Series A rounds. The firm provides hands-on support including:
- Introductions to portfolio companies and ecosystem partners
- Talent placement support (100+ hires facilitated in 2025)
- Strategic advisory and founder guidance
- Access to deep climate expertise and networks
Recent Activity & Deployment
Fund II is in active deployment phase with 2025 highlights:
- 21 total investments (13 new portfolio companies)
- $15M+ deployed into clean energy, abundance, infrastructure resilience, and new industrialism
- Portfolio companies achieving significant milestones (Crusoe's $500B Project Stargate partnership)
- Strong co-investor relationships
Notable recent investments: Crusoe Energy, Exowatt, Hammerhead AI, Aalo, Moment Energy, Pacific Fusion, New Mantle Technologies
Portfolio Depth
MCJ has built portfolio of 80+ companies across climate and clean tech with:
- Strong distribution across energy transition, industrial decarbonization, and adaptation
- Companies ranging from pre-seed through growth stage
- Both pre-revenue startups and revenue-generating companies
- Additional investment from top-tier venture and strategic investors
- Strong momentum with enterprise partnerships and government support
Team Composition
Core team brings deep technical knowledge and extensive climate networks:
- David Aronoff: Chairman/Managing Partner with deep climate expertise
- Cody Simms: Managing Partner, now UCLA Anderson lecturer on impact investing
- Yin Lu: Partner in energy and industrial transition
- Thai Nguyen: Partner with international cleantech expertise (recent China tour)
- Jason Jacobs: Founder and Venture Partner, Inevitable podcast host
- Supporting team in CFO, investments, talent, and marketing roles
Decision Process
Partnership-driven decision making with estimated 3-4 week timeline for seed stage. Warm introductions strongly preferred and likely necessary given MCJ's market position and deal flow. The firm typically takes board seats or observer rights in investments.
Geographic Focus
Primary: US (California, Texas, climate hubs). Secondary: Europe. Emerging: China for international cleantech leaders. Global: Open to exceptional founders solving global problems.
Founder Preferences
MCJ seeks technically sophisticated founders with:
- Deep domain expertise in energy, industrial processes, or climate science
- Operational track records in relevant industries
- Mission-driven commitment to climate impact alongside financial returns
- Global mindset understanding international challenges
- Resilience and resourcefulness for capital-intensive industries
- Strong communication skills (firm features founders on podcast)
Differentiation & Notable Characteristics
Media & Community: Inevitable Podcast (53 episodes in 2025), curated newsletter, MCJ Collective community (3,500+ members in 50+ countries, 100+ annual events, 600+ portfolio introductions). Positions MCJ uniquely as both capital provider and ecosystem hub.
Talent Initiative: Coordinated placement/hiring for portfolio companies, talent marketplace, ecosystem partnerships
Thought Leadership: Policy engagement, enterprise procurer relationships (Microsoft $1B fund discussions), international expertise
Fund Philosophy: Patient capital for capital-intensive climate tech, belief in energy abundance as climate prerequisite, dual focus on impact and returns, multi-fund support strategy
Competitive Position
MCJ is the leading US climate-focused VC firm, differentiated by community scale, founder platform, and operational depth. Works with top-tier co-investors (a16z, Sequoia, strategic investors, corporate venture arms).
Fund III Prospects
Strong market position and 2025 metrics suggest MCJ well-positioned for Fund III within 12-24 months.