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J Stern & Co
J Stern & Co launched in 2012 as the investment vehicle for the multi-generational wealth of the Stern family, French descendants of a banking lineage...
J Stern & Co
J Stern & Co launched in 2012 as the investment vehicle for the multi-generational wealth of the Stern family, French descendants of a banking lineage established by Jacob Stern in Frankfurt in 1805. The founding partners — Jérôme Stern and Christopher Rossbach — built the firm as a true partnership with no external shareholders, a structure designed to eliminate pressure for short-term exits or strategic pivots that would dilute the family's permanent capital horizon. The firm deploys capital through actively managed strategies covering global equities, multi-asset portfolios, corporate credit and emerging market debt. Each strategy runs high active share with low turnover, reflecting Rossbach's stated preference for holding quality businesses over 5-to-10-year windows. Alongside the liquid book, the firm participates in direct co-investments and private credit, with confirmed positions spanning FinTech, healthcare services, industrial technology, luxury, and energy transition assets. The partnership invests globally with activity documented across Europe, North America, Asia, the Middle East and Africa, and maintains offices in London, New York, Zurich and Malta to support sourcing. The team comprises 51 professionals including partners, senior directors and analysts, with reporting lines that keep all investment, client and operational activity under partner governance. A notable structural feature: the Stern family, partners and employees collectively represent 20% of total assets under management and advice, reinforcing alignment that most multi-family offices claim but few codify through ownership. No AUM figure is publicly disclosed; Altss estimates the firm oversees between $1.5 billion and $3.0 billion. The firm expanded its physical footprint in the last two years, opening its Malta office to complement existing operations in Switzerland and the United States. The firm's structural differentiator is its absence of external shareholders combined with succession architecture that embeds the next generation of partners inside the capital base. Unlike most multi-family offices that aggregate unrelated families into a single pooled vehicle, J Stern & Co operates as the direct extension of a single named family's balance sheet while selectively accepting external clients into the same strategies — creating an alignment stack that ties partner compensation, family wealth preservation and external client outcomes to identical portfolios.
General information
Firm type
Multi Family Office
Year founded
2012
AUM
$1.5B - $3.0B (Altss estimate)
Location
Region
Europe
Country
United Kingdom
City
London
Corporate office
4 Carlton Gardens, London, SW1Y 5AA, United Kingdom
Additional offices
45 Rockefeller Plaza, New York, NY 10111, USA · Gartenstrasse 10, 8002 Zürich, Switzerland · 2 Sir Augustus Bartolo Street, Ta' Xbiex XBX1091, Malta
Principals
Jérôme Stern
Managing Partner
Christopher Rossbach
Managing Partner and Chief Investment Officer
Thomas Price
Managing Partner and Chief Compliance Officer
Sector focus
Frequently asked questions
Who runs investment decisions at J Stern & Co?
Christopher Rossbach serves as Managing Partner and Chief Investment Officer and leads all investment activity. He co-founded the firm with Jérôme Stern in 2012 and operates within a partnership structure where investment, client and operational decisions remain under partner governance. The investment committee includes partners such as Jean-Guillaume de Tocqueville, reinforcing the family's direct oversight of portfolio construction.
How is J Stern & Co different from a standard multi-family office?
The firm is structured as a true partnership with no external shareholders, meaning there is no pressure to sell, merge or exit the business. The Stern family, partners and employees collectively supply 20% of total assets under management and advice, so the team invests alongside external clients in identical strategies rather than managing separate pools. This alignment is rare among multi-family offices that typically aggregate unrelated families without meaningful insider co-investment.
Does J Stern & Co participate in fund commitments or only direct deals?
The firm operates primarily through actively managed liquid strategies — global equities, multi-asset, corporate credit and emerging market debt — but also engages in direct co-investments and private credit. It does not market itself as a fund-of-funds allocator, though its confirmed investment types span fund of funds, hedge funds, infrastructure, private credit and private equity, suggesting a hybrid approach that mixes direct positions with external fund commitments.
What investment stages does J Stern & Co target?
In its liquid public equities and credit strategies, the firm targets established companies with durable competitive advantages and the capacity to compound over 5-to-10-year holding periods. In private markets, confirmed stage coverage includes growth, late stage and debt, reflecting a preference for companies that already generate cash flow rather than early-stage venture bets.
Where does the underlying wealth of J Stern & Co come from?
The capital originates from the Stern banking family, which established banking houses across Europe and Asia beginning with Jacob Stern in Frankfurt in 1805. The French branch of the family, represented by Jérôme Stern, provides the permanent capital anchor around which the 2012 partnership was formed.
Does J Stern & Co maintain philanthropic structures, and how are they separated?
The firm is associated with several philanthropic entities including the J Edward Stern and Helen Mc Stern Charitable Foundation, the Jerome Stern Charitable Trust, the Stern Family Philanthropic Foundation, and the Strawberry Hill Trust. These are maintained as separate legal structures with their own governance, not commingled with the firm's investment management operations.
What is J Stern & Co's posture on co-investments alongside external GPs?
The firm does not publicly detail its co-investment policy, but its confirmed investment types include direct co-investments and SPVs, indicating willingness to participate alongside external managers when opportunities align with the partnership's long-term quality criteria. All investment activity operates under the same research-led, high-conviction framework that governs the liquid strategies.
Profile maintained by Altss using OSINT (open-source intelligence), regulatory filings, licensed data partners, and verified direct submissions. Read the methodology. Last updated: . Continuous refresh with full update cycles at least every 30 days.
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