# IJ Partners

IJ Partners is a Multi Family Office based in Geneva, Switzerland.

## Overview

- **Organization type:** Multi Family Office
- **Headquarters:** Geneva, Switzerland
- **Region:** Europe
- **Address:** Geneva, Switzerland
- **Assets under management:** Undisclosed
- **Website:** ijpartners.com
- **LinkedIn:** https://www.linkedin.com/company/ijpartners

## Regulatory record

- **Reports private funds:** No

## About

Theodore Margellos established IJ Partners as a multi-family office in Geneva. The firm supplies investment advisory and financial planning to high-net-worth families focused on capital preservation across generations. IJ Partners allocates across private equity, private credit, real estate, infrastructure and natural resources. It also commits to funds and participates in secondaries. Confirmed holdings include commercial property in Thessaloniki and the Bentwaters Airport site in Suffolk. The firm maintains exposure in Europe, North America, Asia, Africa, the Middle East and South America. No recent operational events from the last 24 months appear in available records. The firm lists philanthropic vehicles that include the Margellos World Republic of Letters and Smiling Children Foundation. IJ Partners operates with an advisory board and external business partners rather than a large internal investment committee. Partners maintain ties to the World Economic Forum and Young Presidents' Organization.

## Sectors

- FinTech
- Energy Transition & Renewables
- Healthcare Services
- AgriTech & FoodTech
- ClimateTech
- PropTech
- Industrial Tech

## People

- Theodore Margellos — Founder and Managing Partner
- José María Figueres — Managing Partner
- Theodore Kyriakou — Co-Investor
- Robert Mundell — Advisory Board
- Miranda Xafa — Business Partner

## Questions

### Who runs investment decisions at IJ Partners?

Theodore Margellos serves as Founder and Managing Partner. José María Figueres acts as Managing Partner. An advisory board that includes Robert Mundell provides additional input.

### Does IJ Partners participate in fund commitments or only direct deals?

The firm uses both approaches. It makes fund commitments, executes secondaries and holds direct positions in real estate and infrastructure.

### Where does the underlying wealth come from?

Wealth origin is not publicly attributed to a single family or operating company.

### What investment stages does IJ Partners typically target?

The firm targets early-stage, growth and startup opportunities alongside later-stage private equity and infrastructure.

## Related profiles

- [Iconic World](https://altss.com/profile/iconic-world)
- [IJP Family Partners](https://altss.com/profile/ijp-family-partners)

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Last updated: 2026-06-03T20:00:00.000Z

Canonical page: https://altss.com/profile/ij-partners

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