Over these years, our team has brought together roughly three decades of experience in private markets and sustainability-driven investing, helping allocate hundreds of millions in impact capital, reviewing hundreds of fund and direct investment opportunities, and engaging in thousands of meetings and exchanges with fellow investors, fund managers, entrepreneurs, experts and institutions.

Our focus remains clear

Profitable, risk-robust, private markets strategies in the themes shaping the New Economy, including Energy Transition, Food Transition, Circular Economy, Nature Finance and Climate Tech.

Alongside capital allocation, we have remained active in Ecosystem Building, market development and thought leadership. We have participated as sponsor, speaker and partner across leading global investment and sustainability forums, sharing our experience, advancing the discussion on how to scale and mobilise capital, and contributing to the development of a stronger, more future-fit economy, aligned with environmental and societal needs.

None of this would have been possible without the trust of our clients, the dedication of our team, the quality of our partners, and the ambition of our investees working every day to build real solutions on the ground.

The SIO is now entering its scale phase. We are delighted of our new strategic collaborations that started this year, and the next chapter is about adding new mandates, scaling existing ones, strengthening senior management capacity, deepening collaboration with capital owners, and deploying more capital into exceptional investments as we move toward our 2030 goals.

We look forward to welcoming new clients, senior experts and strategic partners who are ready to move with conviction, inspired by our work, and keen to co-create this next phase of growth with us!

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SIO Managing Partner Kostis Tselenis held a speech at the Family Office Investors Summit during Davos #WEF2026, contributing to two panels focused on how family offices are shaping long-term capital allocation and impact-driven investment strategies

Panel #1 | Family Offices Insights: The DNA of Success
Capital Allocation, Governance & Risk Culture 2030
(Together with Camila Clarke, Clarke Capital, Abdul Rafay Gadit Family Office Investor & ZIGChain)

Panel #7 | Impact Investment & Global Capital Deployment
(Together with: Karen Korponai, BlueLight Humanitarian Airlines | Blue Terra Capital | GBBC, Alexander von Koenig, Pioneeress von Koenig Rescue Association, Tami Kesselman, LOHAS Impact Investing | ReThink Packaging | Next Gen Success)

The discussions explored how global private capital, and especially family offices, can move from intention to execution in Impact Investing, across generations, geographies and asset classes.

Watch the full Impact Investing Trends presentation at the Family Office Investors Gathering of the #WEF2026:

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SIO was delighted to co-host our – full-house – Impact Gathering & Christmas Apero together with INOKS Capital S.A. last week in Zurich. The discussion focused on how alternativeinvestments, realassets and impact strategies are converging around sustainable food and agriculture, driven by foodsecurity, climate pressures and changing investor expectations.

Nicolas Laporte, mentioned that private debt is becoming a mainstream asset class, increasingly used as a proxy for fixed income in diversified portfolios. The universe of ESG and impact managers remains limited, requiring pragmatic allocation choices and selective arbitrage. Interest in ESG and impact strategies is steadily increasing, especially among younger private banking clients, where sustainability is becoming a baseline expectation.

Rosa Sangiorgio, mentioned that Switzerland faces a defining choice: to be remembered as the place that protected yesterday’s wealth, or as the place that helped design the financial system for tomorrow. Impact investing is not a niche; it is good risk management in a world where climate, health and social tensions are now priced.

Mirjam Garzon, stated that the impact investing community continues to grow fast each year, while methodological challenges around definitions and measurement remain. Sustainable food and agriculture stand out as one of the most important and widely supported themes across the global impact community.

Nabil Marc ABDUL-MASSIH, presented short-term, asset-backed food chain financing in developing economies, mentioning it usually carries lower risk than perceived when properly structured and monitored, while delivering tangible local impact including job creation and women empowerment. In Europe, a significant “missing middle” financing gap exists for agri-food SMEs, creating an attractive private debt opportunity. aligned with the EU’s food security agenda.

Yullie (Panagiota) Matsouka mentioned that impact investments increasingly deliver on investor expectations, often more consistently than traditional strategies. They are fundamentally real-economy investments and do not carry higher risk by default.

Kostis A. Tselenis highlighted clear macro trends: impact strategies are becoming a structural allocation in institutional portfolios, not a niche. Evergreen structures, particularly in private debt, are gaining momentum as investors seek income, resilience and real-asset exposure. The traditional narrative of impact versus returns is increasingly obsolete.

Thank you to all speakers and participants for a thoughtful, investor-driven discussion!

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“…Investments totaling 50 million euros in Greek agri-food businesses – Which fund wants to finance Greek producers, what are its criteria and why the impact is critical?…

Among the investors who have placed capital in INOKS Capital is the Swiss Impact Office, a multi-family office and investment advisor that combines efficiency with impact.

“We work with families, institutions and private banks that want to invest in real sustainability projects, with profitability and measurable results,” explains Kostis Tselenis, managing partner of the Swiss Impact Office, which made its first investment in Greece a few years ago, in Βrite Solar, an agrophotovoltaic technology company that combines food and energy production.

“Our goal is to prove that impact investing is a new form of profitable investment, not charity. Zurich has evolved into a center for such investment strategies, and Greece has all the conditions to become the hub of southeastern Europe for sustainable investments,” emphasizes K. Tselenis…”

Read the full article (in Greek) here.

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The SIO’s mission is to accelerate the transition towards a regenerative and inclusive economy by allocating institutional and private capital into profitable and impactful companies and funds. We focus in parallel on fostering learning, education, and collaboration across the ecosystem.

We are honoured to support the Hellenic Impact Investing Network in shaping this truly international and transformational ImpactEvent.

Join us in Athens for the ImpactWeekend & two days of inspiration, partnerships, and new opportunities to scale impact!

Register here: www.impactconference.gr and join the celebration, join the movement and be part of the change!

Main sponsors of the #HIIC25: swiss impact office, INOKS Capital S.A., Good Move Initiatives, Sporos Platform, Helidoni Group, AE4RIA

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We will have the honour of joining Alexandra Mitsotaki at the World Human Forum’s 3rd Symposium for a New Eleusis, to explore how Impact Investing can align profit with purpose, mobilising capital for reforestation, regenerative agriculture, water security, and biodiversity protection.

We will reflect on the third wave of Nature Finance that is emerging: a shift in values from seeing nature as a resource to recognising it as a living system built on contributions, stewardship, and trust.

Join us at the Old Oil Mill Factory in Elefsina, Athens, on the 26th of September. More information

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via: forbes.com

The SIO and its MD Kostis A. Tselenis featured at Forbes Article of Francois Botha on the Impact Investing & Philanthropy Panel, at Verbier Summit 2024.

Francois Botha wrote about how “sustainable deployment of capital has filled several gaps between traditional investing purely for financial gain on the one end of the spectrum and pure philanthropy”, and mentioned:

“…Panel participants included Jostein Urne, a co-founder and the head of Impact at Oslo Family Office; Naava Mashiah, CEO at ME Links, an advisor to UHNW Families on sustainable private equity investments; Kostis Tselenis, Managing partner at Swiss Impact Office, an impact and sustainability investment boutique in Zurich and Bastien Varoutsikos, a cultural heritage expert and archaeologist, and the director of strategy at the ALIPH Foundation that works at the intersection of climate change and cultural heritage. Other impact & sustainability heavyweights were also at the event, including Damian Payiatakis, Head of Sustainable and Impact Investing at Barclays.

Needless to say, there was plenty of deep knowledge and experience at the event and on the stage; for that reason, the live questions that came in from the audience were equally insightful, especially when trying to understand perspectives around impact investing.”

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via: forbes.com

The SIO and its MD Kostis A. Tselenis featured at Forbes Article of Francois Botha on the Impact Investing & Philanthropy Panel at this year’s Verbier Summit. Francois Botha wrote about how “sustainable deployment of capital has filled several gaps between traditional investing purely for financial gain and pure philanthropy“, reporting about the Verbier Summit 2024:

“…The summit facilitated several discussions on how to close the trillion-dollar funding gap of capital needed for sustainable solutions, including a session about the role of Impact Investing & Philanthropy, the current challenges, and tips on how to move forward. Panel participants included Jostein Urne, a co-founder and the head of Impact at Oslo Family Office; Naava Mashiah, CEO at ME Links, an advisor to UHNW Families on sustainable private equity investments; Kostis Tselenis, Managing partner at Swiss Impact Office, an impact and sustainability investment boutique in Zurich and Bastien Varoutsikos, a cultural heritage expert and archaeologist, and the director of strategy at the ALIPH Foundation that works at the intersection of climate change and cultural heritage. Other impact & sustainability heavyweights were also at the event, including Damian Payiatakis, Head of Sustainable and Impact Investing at Barclays…“

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Impact Summit Europe 2022

Looking forward to our panel with top speakers Alexander Neil, Nicolas Mougeot, Bart Vanhaeren, Graig Reeves and Daniel Ung, CFA, CQF, CAIA, FRM, discussing current challenges and outlook of ESG strategies. Thank you Maxime Laurent!

ESG & Sustainable Investing: Evolution, opportunities and work to be done.

Panelists:
– Mr. Alexander Neil, Head of Equity Advisory, HSBC Private Bank
– Nicolas Mougeot, Head of Global Trends and ESG Advisory, CA Indosuez
– Bart Vanhaeren, Chief Executive Officer, InvestSuite
– Graig Reeves, Prestige Funds, Director Founder
– Daniel Ung, Ung Head of Quantitative Research Analysis ETF Portfolio Solutions EMEA APAC

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