AUM
Est. $8B+ (based on Berkshire sale proceeds + remaining family holdings)
Principals
6
Principal Net Worth
$7.6B
Data Flags
Founder Stef died March 2025; son Eitan died 2022; Berkshire Hathaway owns ISCAR
Wertheimer Family Office (ISCAR / IMC Group)
Multi-generational Family OfficeHigh ConfidenceTefen Industrial Park, Israel
Last verified: Jan 16, 2026
Details
- Source of Wealth
- Industrial manufacturing (ISCAR cutting tools)
- Assets Under Management
- Est. $8B+ (based on Berkshire sale proceeds + remaining family holdings)
- Source File
- research/organizations/wertheimer-family-office.md
- UID
- fo-wertheimer-family-office
Also Known As
Principals (6)
Team Members (4)
Related Entities (7)
Jet engine blades (sold 51% to Pratt & Whitney, 2014)
(UK holding company) - 100% ownership Chanel S.A.S. (France - fashion, accessories) Chanel Inc. (USA - North American operations) Chanel Watch Division (Switzerland) Revenue: ~$17B (2022 estimate)
Cutting tools manufacturer (now owned by Berkshire Hathaway)
Parent holding company
Zillow Group (NASDAQ: Z, ZG): Online real estate marketplace Founded 2005, went public 2011 Market cap: ~$10-15B (varies) Rich Barton owns significant stake Portfolio includes: Zillow, Trulia, StreetEasy, HotPads, Out East, ShowingTime Expedia Group (NASDAQ: EXPE): Online travel company Rich Barton founded 1996 within Microsoft Spun out as independent company 1999 Rich Barton served as CEO 1999-2003 No longer actively involved (sold most stake) Glassdoor: Company review and job search platform Co-founded 2007 with Robert Hohman and Tim Besse Acquired by Recruit Holdings in 2018 for $1.2B Rich Barton served on board as founding investor Successfully exited
Tel Hai, Dalton, Lavon, Nazareth, Omer (Israel); Gebze (Turkey)
Model industrial park (founded 1982)
Relationship Strength
Sources (5)
- https://en.wikipedia.org/wiki/Stef_Wertheimer
- https://www.iscar.com/en-hq/about/founders
- https://www.forbes.com/profile/stef-wertheimer/
- https://www.timesofisrael.com/billionaire-industrialist-stef-wertheimer-dies-at-98/
- https://www.thejc.com/news/obituaries/stef-wertheimer-israeli-business-mogul-and-advocate-for-arab-jewish-peace-dies-at-98-lkrj16po
Changelog
- 2026-01-16Comprehensive enrichment - added Stef Wertheimer biography (1926-2025, ISCAR founder, $7.6B, Israel Prize), Eitan Wertheimer (son, died 2022), Miriam (wife), granddaughter Maya Wertheimer (actress), ISCAR history (sold to Berkshire for $6B total), industrial parks (7 locations), philanthropy and peace efforts. Updated confidence to High.
- 2026-01-15Auto-generated from principal Stef Wertheimer & family