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Greenlight Capital
Greenlight Capital is a $4B hedge fund founded by David Einhorn in 1996, known for activist long/short value investing in financials, tech, and healthcare.
Greenlight Capital
David Einhorn launched Greenlight Capital in 1996 with $900,000 from family and friends, a firm that would become synonymous with deep-value, event-driven investing. The firm's public track record includes a 44.1% return in 2008 during the financial crisis, betting against Lehman Brothers and other banks. Greenlight concentrates capital in a small number of high-conviction positions across equities, credit, and derivatives. The firm takes activist or publicly engaged stances — Einhorn has published detailed short theses on companies such as Allied Capital, Green Mountain Coffee Roasters, and Tesla. Major long positions have included Apple, General Motors, and Brighthouse Financial. Geographically, the firm focuses on US-listed equities with occasional European exposure. The firm has managed peak AUM of approximately $7–8B (per Bloomberg, 2014) but saw redemptions after a multi-year drawdown from 2015–2018. As of Q1 2026, AUM is roughly $4B (per SEC filings). Greenlight operates from a single New York office with a lean investment team; Einhorn remains the key decision-maker. Greenlight's structural differentiator is its transparent, public-facing investment process — quarterly letters, investor conferences, and litigation around short positions — combined with a long-term patient capital base that tolerated a multi-year underperformance cycle. The firm is not a standard family office but a hedge fund run by its founder-operator.
General information
Firm type
Hedge Fund
Year founded
1996
AUM
Approximately $4B (per SEC filings, 2026)
Location
Region
North America
Country
United States
City
New York
Corporate office
New York, NY, United States
Principals
David Einhorn
President and Founder
Daniel Roitman
Chief Operating Officer
Sector focus
Frequently asked questions
Who runs investment decisions at Greenlight Capital?
David Einhorn serves as President and Founder, making all significant investment decisions. He has run the firm since its inception in 1996. Daniel Roitman serves as Chief Operating Officer, handling operational oversight.
Does Greenlight Capital participate in fund commitments or direct deals?
Greenlight operates primarily as a long/short equity hedge fund through a single pooled vehicle. The firm does not run separate direct-investment arms or co-investment funds; instead, it takes concentrated positions via its main fund. Einhorn does participate in activist campaigns, which often involve public communication and board influence.
What investment stages and sectors does Greenlight focus on?
The firm invests in publicly traded equities and credit, with a focus on US large-cap value stocks. Einhorn has historically targeted financials, industrial cyclicals, and select technology and healthcare names. The firm also maintains a short book, often betting against overvalued companies with questionable business models.
How does Greenlight source proprietary deal flow?
Greenlight does not have proprietary deal flow typical of private equity. Its edge comes from deep fundamental research, public filings analysis, and Einhorn's network of contacts in the financial community. The firm's public short campaigns can move stock prices, giving it a unique ability to influence outcomes before taking positions.
Is Greenlight Capital a single-family office?
No. Greenlight Capital is a registered investment adviser operating as a hedge fund. While David Einhorn is the founder and core decision-maker, the fund has taken outside capital from institutional investors. The firm does not manage a concentrated family fortune but pools capital from various LPs, including pension funds and endowments.
What is Greenlight's known posture on co-investments alongside external GPs?
Greenlight does not typically engage in co-investments alongside other GPs. Its strategy is centered on public market securities, and it does not have a dedicated private equity or venture capital arm. The firm's public 13F filings show no CDO or CLO activity.
How is Greenlight Capital related to Einhorn's philanthropic work?
David Einhorn and his wife Cheryl Einhorn run the Einhorn Foundation, which focuses on biomedical research, education, and children's health. The foundation is funded by the family and is separate from Greenlight Capital's operations. Einhorn also founded the Einhorn Collaborative, a foundation focused on social justice.
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