GKB Partners

The wealth originated from the 2018 take-private of AmTrust Financial Services, a multinational property and casualty insurer co-founded by George Karfunkel and his brother Michael. The deal, led by Stone Point Capital alongside the Karfunkel family, valued AmTrust at approximately $2.7 billion. George Karfunkel had served as CEO of the company, which he built over two decades from a single-line workers' compensation carrier into a diversified insurance platform.

George Karfunkel is the principal and directly oversees investment decisions. He brings operational underwriting experience from his tenure as CEO of AmTrust. The office does not publicly list a separate CIO or external investment committee, consistent with a principal-led single-family office structure.

The office concentrates on direct real estate in the New York metropolitan area, with a focus on value-add multifamily and select office properties. Outside of real assets, GKB Partners makes opportunistic allocations to venture and growth equity, particularly in fintech and insurtech companies where the Karfunkel family's insurance-industry operating experience provides a due-diligence edge. The office also participates in fund commitments within insurance-linked strategies.

Yes. GKB Partners operates as the single-family office for George Karfunkel and his immediate family. It does not manage outside capital or operate a multi-family office platform. Its mandate is exclusively to preserve and grow the Karfunkel family's wealth.

GKB Partners is known to pursue both direct investments — particularly in real estate — and fund commitments in insurance-linked and venture strategies. The mix varies by asset class, with real estate favoring direct ownership and venture exposed through a combination of direct seed and early-stage checks alongside limited partner stakes in external funds.