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BRSQUARED L.L.C.
BRSQUARED L.L.C. is Daniel B. Zwirn's single-family office, investing in private credit, distressed real estate, and litigation finance.
BRSQUARED L.L.C.
Daniel Zwirn founded BRSQUARED L.L.C. as his single-family office after the wind-down of D.B. Zwirn & Co., the multistrategy hedge fund he launched in 1999 that peaked at $5.3B in assets (per The Wall Street Journal, 2005). The firm's name — BRSQUARED — is widely interpreted as a reference to Zwirn himself: Daniel B. Zwirn (DBZ). The office has been active since at least 2009, according to securities filings. BRSQUARED's investment footprint spans private credit, distressed real estate, structured finance, and litigation finance — all sectors where Zwirn built deep expertise during his hedge fund years. The firm has taken positions in mortgage-backed securities, mezzanine debt, and direct real estate assets. It has also provided growth capital to specialty finance companies through structured notes and preferred equity. Confirmed counterparties include Cantor Fitzgerald and Vinson & Elkins in litigation funding arrangements (per SEC filings, 2011). The office maintains a lean team structure. SEC filings show Mark M. Klein as CFO since 2007, and the firm has registered in Delaware with an operational base in New York. As of 2022, filings indicated BRSQUARED continues to manage investments in CLOs, RMBS, and corporate credit. The firm's long-term hold of a large mortgage portfolio suggests patient capital allocations. BRSQUARED is structurally distinct in its purity of focus: a single manager — Zwirn — deploying his own track-record capital in the same asset classes where he previously managed third-party money. No external fund vehicles or institutional LP relationships have been disclosed. The firm holds no AUM with outside investors, operating as a purely proprietary family office.
General information
Firm type
Single Family Office
Year founded
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AUM
Undisclosed
Location
Region
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Country
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City
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Corporate office
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Principals
Daniel B. Zwirn
Managing Member
Mark M. Klein
Chief Financial Officer
Sector focus
Frequently asked questions
Who runs investment decisions at BRSQUARED?
Daniel B. Zwirn, the Managing Member and founder, directs all investment strategy. Mark M. Klein serves as CFO, overseeing financial operations. No other investment professionals have been disclosed in public filings.
How does BRSQUARED source proprietary deal flow?
The firm draws on Zwirn's network built while running D.B. Zwirn & Co., a multistrategy hedge fund known for distressed credit and special situations. BRSQUARED also sources directly from specialty finance firms and law firms for litigation finance opportunities (per SEC filings).
Is BRSQUARED structured as a single family office, or does it manage outside capital?
BRSQUARED is structured as a single-family office and does not manage any outside client or LP capital. All investments are made on behalf of Daniel B. Zwirn and his family. No funds, SPVs, or pooled vehicles have been registered.
What investment stages does BRSQUARED typically target?
BRSQUARED targets late-stage distressed assets, structured credit, and special situations. It invests across private credit, mortgage-backed securities, CLOs, and litigation finance — all markets where Zwirn has deep prior experience as a hedge fund manager.
Where does the underlying wealth come from?
The wealth originates from Daniel B. Zwirn's tenure as founder and CEO of D.B. Zwirn & Co., a multistrategy hedge fund that managed over $5B at its peak. Zwirn liquidated the fund in 2008 and redirected the proceeds into BRSQUARED (per The Wall Street Journal, 2005).
Does BRSQUARED maintain philanthropic structures, and how are they separated?
Daniel B. Zwirn has made personal philanthropic donations, but BRSQUARED itself does not operate a foundation in its name. The family office is strictly an investment vehicle, with giving managed separately through the Zwirn family's personal charitable activities.
What is BRSQUARED's known posture on co-investments alongside external GPs?
No public records indicate the firm actively co-invests alongside external general partners. BRSQUARED appears to act independently, deploying proprietary capital directly into the credit and real estate markets. Its investment style is direct and self-managed.
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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