G2 Venture Partners

Co-founders Brook Porter and David Mount serve as Managing Partners and lead the investment committee. Both were previously partners at Kleiner Perkins, where they co-managed the Green Growth Fund before spinning out G2 in 2021. The firm's partnership structure concentrates decision-making authority in the two co-founders, with sector specialists contributing to diligence and portfolio support.

G2 draws on a network built during its Kleiner Perkins tenure, which included early relationships with executives now leading clean-energy unicorns. The firm also benefits from corporate limited partner relationships that provide visibility into supply-chain bottlenecks and procurement needs across industrial and utility sectors. Co-founder Brook Porter has publicly cited the firm's ability to reference-check technical talent through former Kleiner portfolio founders as a distinct sourcing advantage.

The spinout, completed in 2021, allowed the team to raise capital from institutional investors who prefer pure-play climate managers without exposure to a generalist venture platform's broader strategy. Independence also eliminated internal competition for partner carry and GP commitment pacing. Limited partners in Fund I gained direct exposure to a concentrated climate growth portfolio without the blended returns of Kleiner's early-stage software and healthcare investments.

G2 targets growth-stage companies — typically Series B through pre-IPO — that have already proven their core technology and are focused on scaling manufacturing, sales, and deployment. The firm explicitly avoids seed and Series A science risk, preferring to invest once technical milestones are met and commercial contracts are in place. This stage focus reflects the partnership's view that venture-scale climate returns accrue during the industrialization phase, not the lab phase.

The firm invests primarily in North America and Europe, with portfolio exposure including US-based Arcadia and European-headquartered 1Komma5°. G2 evaluates opportunities where clean-energy regulation, grid modernization, or electrification mandates create near-term demand pull. Cross-border logistics and trade-corridor efficiency — such as the US-Mexico route that portfolio company Nuvocargo serves — represent a secondary geographic thesis.

G2 is a dedicated climate-only manager, meaning its entire partnership, diligence team, and limited partner base are aligned around energy transition outcomes rather than allocating a portion of a multi-sector fund to green deals. This focus eliminates the opportunity cost of passing on a higher-return software deal to preserve climate allocation, a conflict generalist growth platforms routinely manage.

Public statements from the firm indicate a 7- to 10-year hold horizon, which is longer than the 5- to 7-year median for growth equity. G2's partners have argued that hardware-heavy climate businesses, including battery manufacturing and EV infrastructure, require slower capital compounding that rewards patient ownership over quick flips to strategics or public markets.