Non‑profit
CH
Chai School
Education & culture
Supporting a bilingual, values‑driven Jewish school community in Rio de Janeiro.
Private Family Office
SOJ LLC
We steward capital and relationships for the long term, investing with discipline across private and public markets while supporting philanthropic work that compounds for generations.
Capital Preservation
Impact that Endures
Philanthropy with measurable, lasting outcomes.
1 — Family Office
Long-term · Private · PrincipledSOJ LLC is a single-family office focused on preserving and compounding family capital. We invest across stages and structures—direct control, minority growth, co-investments, funds, and public markets—anchored by underwriting that prioritizes durability, quality of cash flows, and aligned incentives.
Mandate
Capital preservation first, then growth.
Strategy
Concentrated where we have an edge; diversified where we don’t.
Focus Areas
Essential services, real assets, niche software, healthcare enablement, and compounding cash businesses.
2 — Manager
Engineer
Executive
Founder
Manager — Marcelo Najnudel
Marcelo is an engineer who held executive positions in international companies for over 20 years. He also founded multiple internet companies, completed successful exits, and now manages the family office and its foundation.
20+ yrs leadership
Founder & exits
Global operating experience
Foundation & FO management
3 — Investments
Current focus areas.
Stocks
FF
Family Fund
Public equities
Long‑term holdings in quality, cash‑generative businesses.
Private Holdings
SC
Shares in Companies
Online agencies, software & technology ventures
Equity positions in select private businesses across online services, digital platforms, and software sectors.
4 — Foundation
Chai SchoolChai School (Non‑profit)
Chai School weaves Jewish life through the school day—from Kindergarten, where Hebrew and songs introduce culture in playful ways, to Elementary School milestones such as a collective Bat Mitzvah. The curriculum pairs broad academic knowledge with Jewish roots to strengthen ethics, cooperation, and the joy of belonging for students and families.
- Educational approach: curiosity & knowledge; cooperation & courage (Tikkun Olam); integrity & diversity (Derech Eretz); reflection & dialogue; self‑reflection & balance (Neshama / Cheshbon Hanefesh).
- Purpose: transform lives through bilingual, inclusive, innovative education that forms ethical, critical individuals.
- Mission: student‑centered bilingual excellence with respect for plurality and social responsibility.
- Vision: be a global reference for academic excellence, pedagogical innovation, and human development.
- Location: Estr. do Joá, 3597 — Itanhangá, Rio de Janeiro (CEP 22611‑021).