- Counteract
- Energy Revolution Ventures
- 2050
- 2150
- 8090 Industries
- a.s.r
- Aavishkaar Group
- ABB Ventures
- Achmea Investment Management
- ADB Ventures
- AENU
- Aligned Climate Capital
- Allivate Impact Capital
- āltitude
- ANEB (ABP’s Nederlands Energie Transitie en Biodiversiteit Fonds).
- Aquila Capital
- Aramco Ventures
- Arborview Capital LLC
- ArcelorMittal XCarb Fund
- ArcLight Capital Partners