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Quinbrook Infrastructure Partners
Quinbrook Infrastructure Partners was founded in 2015 by David Scaysbrook and Rory Quinlan, who previously led the North American and Australian...
Quinbrook Infrastructure Partners
Quinbrook Infrastructure Partners was founded in 2015 by David Scaysbrook and Rory Quinlan, who previously led the North American and Australian operations of Babcock & Brown, the infrastructure investment firm that collapsed in 2009. The partners structured Quinbrook as a specialist investment manager rather than a family office, retaining a permanent capital base from institutional allocators and co-investment partners. The firm targets energy transition infrastructure across three core pillars: renewables (solar, wind, battery storage), power delivery (transmission and distribution networks), and industrial decarbonization (green hydrogen, carbon capture, and sustainable fuels). Quinbrook holds a notable portfolio position in the Gemini Solar Project in Nevada, one of the largest solar-plus-battery facilities in the US, and has invested in the Ironbark green hydrogen project in Queensland, Australia. Geographically, the firm operates across North America, Europe, and Australia, with offices in London, New York, Houston, Stamford, Boulder, Brisbane, and Sydney. Quinbrook manages capital for institutional investors including pension funds, endowments, and insurance companies, though the firm does not publicly disclose total AUM. In January 2025, Quinbrook closed the Quinbrook Net Zero Power Fund at $3.6 billion, marking one of the largest infrastructure fundraisings focused on power transition that year (per the firm's announcement, January 2025). The firm's team size is undisclosed, but it maintains six offices across three continents. A structural differentiator is Quinbrook's vertically integrated investment and asset management model: the firm not only finances but also develops and actively manages many of its portfolio assets through a dedicated operations and project management team. This hands-on posture — closer to an independent power producer than a conventional fund manager — allows Quinbrook to influence construction, operational efficiency, and offtake arrangements directly.
General information
Firm type
Asset Manager
Year founded
2015
AUM
>$10 billion (Altss estimate)
Location
Region
Europe
Country
United Kingdom
City
London
Corporate office
London, United Kingdom
Additional offices
New York, NY, United States · Houston, TX, United States · Stamford, CT, United States · Boulder, CO, United States · Brisbane, Australia · Sydney, Australia
Principals
David Scaysbrook
Co-Founder and Managing Partner
Rory Quinlan
Co-Founder and Managing Partner
Sector focus
Frequently asked questions
Who runs investment decisions at Quinbrook Infrastructure Partners?
David Scaysbrook and Rory Quinlan serve as co-founders and managing partners, leading the firm's investment committee. Both previously led Babcock & Brown's North American and Australian infrastructure activities before its collapse in 2009. The firm maintains a dedicated investment team across its offices, though specific composition is not publicly detailed.
How does Quinbrook source proprietary deal flow?
Quinbrook combines a traditional fund origination model with an in-house development and asset management team that identifies and structures projects from the ground up. This vertically integrated approach allows the firm to access early-stage development opportunities in renewables, power grids, and industrial decarbonization that may not be available through competitive auction processes.
Is Quinbrook structured as a single family office or does it operate more like a venture firm?
Quinbrook is structured as a specialist infrastructure asset manager, not a family office. It manages institutional capital through commingled funds and separate accounts, with a permanent capital base from pension funds and endowments. The firm does not manage wealth for any single family and is not a family office.
Does Quinbrook participate in fund commitments or only direct deals?
Quinbrook primarily makes direct infrastructure investments through its commingled funds, such as the Quinbrook Net Zero Power Fund, which closed at $3.6 billion in January 2025. The firm also engages in co-investments alongside institutional limited partners and structures separate accounts for certain clients, but it does not operate as a fund-of-funds.
What investment stages does Quinbrook typically target?
Quinbrook targets mid- to late-stage infrastructure assets, including new-build projects under construction, operational assets, and expansion-stage energy infrastructure. The firm does not typically invest in early-stage venture or technology companies, focusing instead on capital-intensive energy transition projects with predictable cash flows.
Which sectors does Quinbrook explicitly focus on?
Quinbrook focuses exclusively on energy transition infrastructure across three pillars: renewables (solar, wind, battery storage), power delivery (transmission and distribution), and industrial decarbonization (green hydrogen, carbon capture, sustainable fuels). The firm does not invest in fossil-fuel production, general real estate, or unconnected sectors.
Does Quinbrook maintain philanthropic structures, and how are they separated?
There is no public disclosure of a separate philanthropic foundation operated by Quinbrook Infrastructure Partners. The firm's principals may engage in personal philanthropy, but the investment manager itself is structured as a for-profit asset manager with no significant charitable arm visible in public records.
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