Sustainable Investing Solutions

What Sustainable Investing Solutions does

Sustainable Investing Solutions (SIS) is a London-based private advisory boutique founded in 2017 by David Short, focused exclusively on the renewable energy sector. The firm provides specialized advisory services spanning project development support, transaction structuring, financial advisory, M&A, and capital arrangement, and serves project developers, financial institutions, and investment funds. SIS claims a cumulative track record of advising on more than 4.5GW of renewable energy capacity and over $17bn in capital values across its mandates, with stated coverage of more than ten renewable technologies.

The firm operates without a disclosed proprietary technology platform and generates revenue from professional advisory fees on episodic, long-cycle mandates. Its registered office is at Kemp House, 160 City Road, London, and it holds FSQS certification, a credential typically required for engagements with financial institutions and large corporates. SIS is led by its founder and principal David Short, who brings over 35 years of renewable energy experience including a prior role heading Mizuho's EMEA renewable energy practice from 2007. The firm reports active operations across the UK, Germany, France, Spain, Italy, Dubai, Abu Dhabi, Saudi Arabia, Jordan, Kuwait, Tunisia, and Japan.

In 2024, an investment vehicle SIS co-founded completed a £242.6m IPO on the London Stock Exchange, representing the firm's most material public market event. The business is uncapitalized by external funding, does not disclose headcount, and shows no AI/ML capabilities or proprietary technology components in available materials. SIS is fundamentally a relationship-driven advisory boutique with deep sector specialization but limited operational transparency.

Name

Sustainable Investing Solutions

Legal name

Sustainable Investing Solutions Limited

Website

https://sustainableisl.com

Company type

Private

Founded year

2017

Operating status

Operating

Headcount range

1–10 employees

Short description

Sustainable Investing Solutions is a London-based private advisory boutique founded in 2017 that provides renewable energy transaction structuring, M&A, and capital advisory services to project developers, financial institutions, and investment funds across more than twelve markets.

Ownership category

akta.pro rank

Product category

Renewable Energy Advisory Services

NAICS

Portfolio Management and Investment Advice (523940)

SIC

Investment Advice (6282)

akta.pro primary industry

ESG/Sustainable Investment Advisory (FSAEAAAJ)

akta.pro secondary industries

Sustainable Private Markets (Impact PE/VC, Private Credit, Infrastructure) (FSAAALAG), Sustainable Infrastructure & Resilient Cities Funds (FSANAJAC)

Keywords

• Renewable energy advisory
• Sustainable investing
• Project development services
• Transaction structuring
• Financial advisory

Headquarters

HQ city

London

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Marketing or Sales, Operations, Technology or R&D

Revenue model

1. Advisory and Consulting Services: Professional advisory services for renewable energy project development, transaction structuring, financial advisory including M&A, and investment arrangement. Revenue generated through consulting fees for advisory engagements covering project development support, financial modelling, contractual arrangements, and bankability assessments through to financial close.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels1 record

Core offering

Sustainable Investing Solutions is an advisory boutique providing specialised renewable energy and sustainable investing services to project developers, financial institutions, and investment funds. Core offerings include project development (site identification, land acquisition, planning/grid, EPC, O&M, PPA), transaction structuring (financial modelling, contractual arrangements, bankability), financial advisory including M&A, community project financing, equity and debt investment arrangement, capital access facilitation, UN SDG compliance reviews, and portfolio management across ten plus renewable energy technologies.

Product overview

Sustainable Investing Solutions (SIS) is an advisory boutique offering specialized renewable energy consultancy services. The company provides a comprehensive suite of advisory services including project development support, transaction structuring, financial advisory (including M&A), community project financing, and equity/debt investment arrangement. SIS also offers capital access facilitation from various financier sources, UN Sustainable Development Goals compliance reviews, and portfolio management. The firm covers multiple renewable energy technologies including onshore and offshore wind, solar PV (crystalline, bifacial, thin film), concentrated solar power, biomass, hydro, biogas, battery storage, waste-to-energy, district heating, and carbon capture/utilisation/storage. The offering is structured as a unified consultancy service rather than a software platform with distinct modules.

Differentiator

Problem solved

Functional benefit

Products and services

• Project Development Services End-to-end project development support covering site identification, land acquisition, planning and grid applications, EPC contract negotiations, O&M arrangements, and PPA contract negotiations for renewable energy projects. For project developers seeking to bring renewable energy assets to financial close.
• Transaction Structuring Services Financial modelling, contractual arrangements, and bankability assessment through to financial close for renewable energy transactions. For project developers, financial institutions, and investment funds structuring renewable energy deals.
• Financial Advisory Services Financial advisory services for project developers, financial institutions, and investment funds including mergers and acquisitions support on renewable energy and sustainable infrastructure transactions.
• Community Project Financing Financing support for community projects from construction through to operation. For community-scale renewable energy developers and investors.
• Equity and Debt Investment Services Arrangement of equity and debt investment for renewable energy projects, covering both public and private markets. For developers and funds seeking capital across the project lifecycle.
• Capital Access Services Facilitation of access to capital from financiers, institutional investors, private investors, investment funds, and mezzanine debt providers for renewable energy projects.
• UN Sustainable Development Goals Compliance Review Review and assessment of compliance with United Nations Sustainable Development Goals for renewable energy projects. For developers and investors seeking SDG-aligned validation of sustainable investments.
• Portfolio Management Services Portfolio management services for sustainable investments and renewable energy assets across investment funds and asset owners.
• Renewable Energy Technology Advisory Specialised advisory across multiple renewable energy technologies including onshore wind, offshore wind (fixed bottom and floating foundations), solar PV (crystalline, bifacial, thin film), concentrated solar power (parabolic trough, tower, linear fresnel), biomass (combustion, gasification, pyrolysis), hydro (run-of-river, tidal), biogas (landfill, anaerobic digestion, bio-methane), battery storage (front-of-meter, behind-the-meter), waste-to-energy, district heating, and carbon capture, utilisation and storage (CCUS). For developers, financial institutions, and funds seeking technology-specific expertise on renewable energy assets.

Quantifiable outcome

• 4.5GW+ of renewable energy technologies advised and financed globally
• +2 more outcomes

Named customers3 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Scale indicators4 records

Recent moves4 records

Expansion highlights4 records

Broad incumbents

• AFRY Management Consulting: Global engineering and advisory firm with a dedicated renewable energy practice covering wind, solar, storage, and bioenergy, providing financial and technical advisory to developers and investors. Comparable in renewable energy technology breadth and advisory scope, but at significantly larger scale.
• Wood Mackenzie: Global research and consultancy firm covering renewables, power, and energy transition, advising investors, developers, and financial institutions on transactions and strategy. Comparable on serving similar institutional clients in renewable energy deal-making, but at substantially larger scale and with proprietary research/data.
• Lane Clark & Peacock (LCP): Independent advisory firm with renewable energy and energy transition advisory capabilities serving investors, developers, and pension funds. Comparable in serving similar institutional client types for renewable energy transactions, though LCP operates across broader advisory domains.
• Baringa Partners: Independent consulting firm with a strong energy and renewables practice advising financial institutions, investors, and developers on energy transition strategy and transactions. Comparable on advisory mandate scope but operates at much larger scale across multiple sectors.
• Bain & Company Energy Practice: Global strategy consulting firm with a dedicated renewable energy and energy transition practice advising corporates, investors, and financial institutions. Comparable on advisory service type for institutional renewable energy clients, though delivered from a generalist strategy platform.
• Deloitte Renewable Energy Advisory: Big Four firm with significant renewable energy advisory practice covering project finance, M&A, and ESG strategy for utilities, developers, and investors. Comparable on advisory service mix and enterprise client base but competes from a much broader platform.
• KPMG Sustainable Finance: Big Four advisory practice with dedicated renewable energy and sustainable finance advisory teams serving financial institutions and developers. Comparable on transaction advisory and ESG advisory services, though delivered as part of a much wider professional services portfolio.

Direct peers

• Pollination: Climate-focused advisory and investment firm providing strategic advisory, capital raising, and project development services in sustainable infrastructure and renewable energy. Comparable as a specialist sustainability advisory boutique serving similar institutional clients.
• Green Giraffe: Specialist financial advisory boutique focused exclusively on the renewable energy sector, advising developers, investors, and lenders on project finance, M&A, and capital raising. Closely comparable in business model, target clients, and deal-type focus to Sustainable Investing Solutions.

Others

• Clean Energy Council: Industry peak body for the renewable energy sector in Australia, not a direct advisory competitor, but serves as an ecosystem participant in the same renewable energy value chain where SIS operates.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/sustainable-investing-solutions

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Sustainable Investing Solutions