LeaderPortfolio
Sundheim
D
Rank #1102
UNITED STATESFinance & InvestmentsHedge funds

Daniel Sundheim

Net Worth
$3.831B
0% (24h)
Daniel Sundheim is an American investor and the founder and Chief Investment Officer (CIO) of D1 Capital Partners, a global investment firm managing assets in public and private markets. His net worth, estimated at $2.6 billion as of March 2026, reflects his success in the hedge fund industry. Sundheim's wealth stems from management and performance fees at D1 Capital, prior earnings from Viking Global Investors where he served as CIO, and his personal investments. His career includes 15 years at Viking Global Investors before starting D1 Capital in 2018. Sundheim is also recognized for his philanthropic work and serves on the boards of the Museum of Modern Art (MoMA), NYU Langone Health, and Columbia Grammar and Preparatory School.

How to read Daniel Sundheim's profile

Public net-worth figures are estimates. They combine observable inputs—typically listed equity, disclosed transactions, and market prices—with editorial judgment where filings are incomplete (for example, private holdings, debt, or cross-holdings). For Daniel Sundheim, we anchor the narrative to Hedge funds and Hedge funds, then update the headline number as markets move. The chart on this page is meant to show trajectory, not a certified balance sheet.

When you see $3.831B alongside global rank #1102, interpret it as our best synthesis of widely cited ownership and price signals—not a claim about cash on hand. Estimates can diverge from other publishers because of different treatment of options, trusts, charitable vehicles, or illiquid assets. We document the general approach in methodology and welcome corrections via corrections.

Country (UNITED STATES) and career milestones on this page are curated for reader context; they should be verified against primary sources when used for research. Editorial metadata for this profile is refreshed on a rolling basis, with deeper audits at least annually (last noted cycle: 2026).

Looking for depth? When available, the dossier and timeline sections below add long-form context beyond the headline number—prioritize those modules when evaluating claims about strategy, controversies, or philanthropic commitments.

The Full Dossier

Early Life

Daniel Sundheim was born outside of Philadelphia and grew up influenced by his father's interest in investing, despite his father's medical profession and his mother being an occupational therapist. Sundheim graduated from the Wharton School at the University of Pennsylvania with a B.S. in Economics in 1999.

Rise to Success

Sundheim's career began at Bear Stearns in the Merchant Banking Group, focusing on private equity investments. He then joined Viking Global Investors in 2002, where he spent 15 years, rising to Co-Chief Investment Officer in 2010 and becoming the sole CIO in 2014. In 2018, Sundheim founded D1 Capital Partners in New York City, using over $500 million of his own money to start the firm. D1 Capital Partners quickly became one of the top-performing hedge funds and manages a mix of public and private investments.

Key Business Strategies

Sundheim's business philosophy emphasizes flexibility and a long-term view, which is reflected in his founding of D1 Capital Partners. D1 Capital invests across various sectors, including technology, healthcare, and consumer markets, adapting strategies to market changes. The firm's name, "D1", reflects the idea of maintaining entrepreneurial energy as espoused by Jeff Bezos, emphasizing a continuous focus on innovation. In 2020, D1 returned 60% and has also had strong gains in private investments.

Philanthropy

Daniel Sundheim and his wife, Brett, are actively involved in philanthropy, supporting education, healthcare, and the arts. They have made significant contributions, including a $10 million gift to the University of Pennsylvania to create the Sundheim International Scholars Fund, a $7.5 million gift for a new humanities building at Ransom Everglades School, and $5 million to the UHealth—University of Miami Health System. The Sundheims' philanthropy also extends to supporting diabetes research.

Career Timeline

2018

Founded D1 Capital Partners

Launched D1 Capital Partners, an investment firm, after leaving Viking Global Investors.

2014

Chief Investment Officer at Viking Global Investors

Became the sole Chief Investment Officer.

2010

Co-Chief Investment Officer at Viking Global Investors

Promoted to Co-Chief Investment Officer.

2002

Joined Viking Global Investors

Worked at Viking Global Investors for 15 years.

1999

Began Career at Bear Stearns

Started in the Merchant Banking Group, focusing on private equity investments.

Philanthropic Impact

Education$9M

Sundheim International Scholars Fund

Scholarship aid for international students at Penn Arts & Sciences

Education$7.5M

Humanities Building at Ransom Everglades School

Gift for a new humanities building on the upper school campus

Healthcare$5M

UHealth – University of Miami Health System

Committed $5 million to UHealth – the University of Miami Health System

Healthcare$1M

Diabetes Research Institute (DRI)

Gift to the Diabetes Research Institute (DRI)

EducationUnknown

Sundheim Family Scholarship

Established the Sundheim Family Scholarship at the University of Pennsylvania

Key Business Ventures & Holdings

CompanyStakeValue
Maplebear Inc.9.48%$1.01M

Net Worth History

In-Depth Analysis

Early Life

Daniel Sundheim was born outside of Philadelphia and grew up influenced by his father's interest in investing, despite his father's medical profession and his mother being an occupational therapist. Sundheim graduated from the Wharton School at the University of Pennsylvania with a B.S. in Economics in 1999.

Rise to Success

Sundheim's career began at Bear Stearns in the Merchant Banking Group, focusing on private equity investments. He then joined Viking Global Investors in 2002, where he spent 15 years, rising to Co-Chief Investment Officer in 2010 and becoming the sole CIO in 2014. In 2018, Sundheim founded D1 Capital Partners in New York City, using over $500 million of his own money to start the firm. D1 Capital Partners quickly became one of the top-performing hedge funds and manages a mix of public and private investments.

Key Business Strategies

Sundheim's business philosophy emphasizes flexibility and a long-term view, which is reflected in his founding of D1 Capital Partners. D1 Capital invests across various sectors, including technology, healthcare, and consumer markets, adapting strategies to market changes. The firm's name, "D1", reflects the idea of maintaining entrepreneurial energy as espoused by Jeff Bezos, emphasizing a continuous focus on innovation. In 2020, D1 returned 60% and has also had strong gains in private investments.

Philanthropy

Daniel Sundheim and his wife, Brett, are actively involved in philanthropy, supporting education, healthcare, and the arts. They have made significant contributions, including a $10 million gift to the University of Pennsylvania to create the Sundheim International Scholars Fund, a $7.5 million gift for a new humanities building at Ransom Everglades School, and $5 million to the UHealth—University of Miami Health System. The Sundheims' philanthropy also extends to supporting diabetes research.

Data Sources & Methodology

Figures for Daniel Sundheim are synthesized from the sources below and cross-checked against our net worth methodology. Estimates may lag market moves; see corrections to report discrepancies.