AUM
Est. $3B+ (Wilmar holdings and other investments)
Principals
4
Principal Net Worth
$3.5B
Data Flags
Wealth tied to Wilmar International stock; limited public family office information
Sitorus Family Office
SFOHigh ConfidenceSingapore / Indonesia
Last verified: Jan 17, 2026
Details
- Source of Wealth
- Agribusiness (Palm Oil - Wilmar International)
- Assets Under Management
- Est. $3B+ (Wilmar holdings and other investments)
- Source File
- research/organizations/sitorus-family-office.md
- UID
- fo-sitorus-family-office
Also Known As
Martua Sitorus Family OfficeSitorus CapitalThio Seng Hap (birth name)
Principals (4)
Team Members (1)
Related Entities (7)
Aviva TowerSubsidiary
London skyscraper
Gama CorporationSubsidiary
Property and cement conglomerate (co-founded with brother)
Gama LandSubsidiary
Property development subsidiary
Gama TowerSubsidiary
64-story tower in Jakarta (tallest in Indonesia)
Murni Teguh Memorial HospitalSubsidiary
Healthcare facility in Medan
Semen Merah Putih (PT Cemindo Gemilang)Subsidiary
Cement manufacturing
Wilmar InternationalSubsidiary
(SGX listed) - World's largest palm oil producer
Relationship Strength
Loading relationships...
Sources (4)
Changelog
- 2026-01-17Upgraded to High confidence - verified $3.55B net worth via Forbes #23 Indonesia 2025, Wikipedia confirms billionaire status
- 2026-01-16Enriched with full biography, birth date (Feb 18, 1960), birth name (Thio Seng Hap), education (HKBP Nomensen University), wife Rosa, brother Ganda Thio, Gama Corporation, Aviva Tower ownership
- 2026-01-15Auto-generated from principal Martua Sitorus