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Oak Group Holding

company 1 Deal 3 Partners

London-based infrastructure investment firm with $4.5B AUM focused on energy transition and digital infrastructure across Europe and Australia. Develops, acquires, and operates utility-scale solar, onshore wind, and battery storage projects, with over 3.2 GW of renewable capacity developed or under management.

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Founded 2004 150 employees
Investment FundInvestorDeveloperAsset Manager

Strategic Overview

  • Increasing focus on hybrid renewable projects combining solar and battery storage, particularly in Australia and Southern Europe.
  • Expanding digital infrastructure investments, with recent entry into data center development in partnership with tech operators.
  • Prefers control positions in development platforms but accepts minority stakes in high-growth technology-enabled developers.
  • Active in secondary buyouts, acquiring portfolios from developers seeking to recycle capital.

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Investment Focus

Technologies
Hybrid1
Geography
Egypt1

Key People

Mark Clare
Chief Executive Officer
James Dean
Chief Investment Officer

Track Record

3,200
MW Total
38
Deals Completed
20
Years Active
$M6,800M
Total Value
Notable projects: Cestas Solar Farm, France, Lynn and Inner Dowsing Wind Farm, UK, Aurora Battery Storage, Australia

Detailed Analysis

Sectors
Energy Transition (32 deals)Digital/Telecom (6 deals)Utilities (3 deals)
Geographies
Western Europe (28 deals)UK (12 deals)France (8 deals)Germany (7 deals)Italy (4 deals)Spain (3 deals)Australia/NZ (5 deals)Australia (5 deals)Nordics (2 deals)Sweden (1 deal)
Deal Stage
GreenfieldBrownfieldOperating
Deal Structure
AcquisitionJoint VentureDevelopmentMinority Investment

Portfolio Companies

Enerparc AG — renewablesGreenVolt — renewablesZolar — renewables

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