Carbon & Climate Finance

Voluntary & Compliance Markets

Platforms and mechanisms for carbon and removal credit markets.

14 tracked carbon and climate offerings →120 tracked energy transition offerings →

Largest SEC filers in this category

Ranked by the total reported sold on the latest Form D or Regulation A notice. Each page carries the filing record, the related persons and what to check; AltStreet gives no verdict on an issuer.

Stonepeak Infrastructure Fund V LP2025 · $7.3B · 98 investors
Manulife Infrastructure Fund III, L.P.2026 · $3.6B · 100 investors
KKR Global Climate Transition Fund (USD) SCSp2025 · $3.0B · 26 investors
KKR Global Climate Transition Fund (EUR) SCSp2025 · $3.0B · 26 investors
HARRISON STREET INFRASTRUCTURE FUND A, L.P.2026 · $1.4B · 20 investors
Stonepeak-Plus Infrastructure Fund (TE) LP2026 · $819M · 104 investors
Stonepeak-Plus Infrastructure Fund LP2026 · $819M · 213 investors
Nanook Energy Fund, LP2025 · $607M · 81 investors
Hotwire Sidecar I LP2026 · $505M · 8 investors
Manulife Forest Climate Fund LP2024 · $479M · 6 investors
HARRISON STREET INFRASTRUCTURE FUND B, L.P.2026 · $386M · 3 investors
CSC Carbon Credit Fund, L.P.2026 · $252M · 4 investors
Aiga Climate Fund I LP2024 · $208M · 10 investors
Climate Asset Management - Nature Based Carbon Fund B SCSp2024 · $195M · 4 investors
World Carbon Fund, a sub fund of Ardan QIAIF ICAV2025 · $149M · 20 investors
Charter Oak Carbon Fund I LP2022 · $145M · 31 investors
Grove Carbon Fund I LP2024 · $130M · 56 investors
MV Global Carbon Fund LP2026 · $96.1M · 92 investors
Aligned Climate Fund 2 LP2025 · $85.1M · 52 investors
Overture Climate Fund I LP2024 · $59.5M · 99 investors

All 41 this category filers on EDGAR →

Investment Overview

Voluntary carbon markets enable companies and individuals to purchase carbon credits voluntarily (vs. regulatory compliance markets like EU ETS, California cap-and-trade). Market size: $2B voluntary (2024) vs. $850B compliance. Voluntary market fractured across registries (Verra, Gold Standard, ACR, CAR, Puro.earth) with varying quality standards. Corporate buyers (Microsoft, Amazon, Delta) drive 80% of demand. Integrity Council for Voluntary Carbon Markets (ICVCM) launched Core Carbon Principles (2023) to standardize quality. Prices: $5-$30/ton avoidance credits, $50-$200/ton removal credits.

Market Context & Trends

Voluntary market crashed 40% in 2023 after investigations exposed low-quality REDD+ (forest protection) credits. Buyers shifted to high-integrity removal credits and nature-based solutions with strong additionality. ICVCM CCP standards now required by major corporate buyers. Compliance markets (EU ETS, California) saw $850B volume but retail investors cannot access directly.

How to Invest in Voluntary & Compliance Markets

Verra VCS Credits: Largest registry, 1,600+ projects, quality varies (due diligence critical)

Gold Standard Credits: Higher quality standard, mostly renewable energy and cookstove projects

ACR/CAR Credits: North American registries, forestry and agriculture focus

Puro.earth CDR Credits: Engineered removal only, 1,000+ year permanence

Toucan Protocol: Tokenized Verra credits on blockchain, fractional ownership

Key Platforms & Access Points

Verra Registry: 1,600+ projects globally, open marketplace for credit trading

Gold Standard: Premium registry, cookstoves and renewable energy focus

Puro.earth: Engineered CDR only, highest integrity standards

Toucan Protocol: Blockchain-based, fractional Verra credit ownership

Patch: API access to multiple registries, corporate purchasing

Key Investment Metrics

Registry: Verra (largest), Gold Standard (quality), Puro.earth (CDR), ACR/CAR (North America)

Vintage: Credit issuance year; recent vintages (2020+) more credible

Project type: Avoidance (renewables, forests) vs. removal (DAC, biochar, mineralization)

ICVCM CCP status: Do credits meet Core Carbon Principles? Requirement for institutional buyers

Additionality assessment: Independent verification that project wouldn't happen without carbon revenue

Risk Considerations

Understanding these risks is critical before investing in voluntary & compliance markets.

Quality variance: 70% of Verra REDD+ credits failed independence studies (2023 investigations)
Registry fragmentation: 5+ major registries with different standards create confusion
Price crashes: Avoidance credit prices fell 50% (2023) after quality scandals
Regulatory uncertainty: Potential mandatory compliance markets could disrupt voluntary markets
Double counting: Same emission reductions claimed multiple times across registries

Latest Research & Analysis

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carbon-climate-finance•Nov 25, 2025

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