Daniel Sundheim | $1B+
Get in touch with Daniel Sundheim | Daniel Sundheim is the American billionaire founder and Chief Investment Officer of D1 Capital Partners, a high-conviction global investment firm launched in 2018. A former CIO at Viking Global with 15 years of experience, he built D1 into a multi‑billion‑dollar firm investing across public and private markets—including leading positions in Instacart and SpaceX. He also serves on boards of MoMA, NYU Langone, and Columbia Grammar.
Daniel Sundheim
Founder and Chief Investment Officer
of D1 Capital Partners
Daniel Sundheim has served on Instacart’s Board of Directors since June 2020. Sundheim is the Founder and Chief Investment Officer of D1 Capital Partners. D1 is a global investment firm that operates across public and private markets. The firm combines the talent and operational excellence of a large, premier asset management firm with the flexible mandate and long-term time horizon of a family office. Founded in 2018, D1 focuses on investing in the global internet, technology, telecom, media, consumer, healthcare, financial, industrial and real estate sectors.
Prior to forming D1, Dan spent 15 years at Viking Global Investors where he most recently served as the CIO responsible for managing a team of analysts and a diversified portfolio. He began his career in the Merchant Banking Group at Bear Stearns researching and executing private equity investments.
Dan graduated from the Wharton School of the University of Pennsylvania in 1999 with a B.S. in Economics. Dan is a board member of several D1 portfolio companies, including Instacart. He is a member of the Board of Trustees of the Museum of Modern Art (MoMA) and NYU Langone Medical Center.
D1 Capital Partners is an American investment firm based in New York City. The firm invests in public and private markets globally.
History and background
D1 Capital Partners was founded in July 2018 by Daniel Sundheim,[1] who is a minority owner of the Charlotte Hornets.[5] "D1" stands for "Day One,"[6] a concept espoused by Amazon.com, Inc.'s Jeff Bezos as detailed in Amazon's 1997 Letter to Shareholders.[7] Sundheim was previously the Chief Investment Officer of Viking Global Investors[8] and put in more than $500 million of his own money to start the firm.[9] D1 Capital Partners is usually grouped with other Tiger Cub funds due to the firm being spun out from one.[10]
The firm originally managed $3 billion of capital, which rose to $20 billion by the end of 2020 with annualized returns of nearly 30%.[9] D1 returned 60% in 2020.[8]
In January 2021, the firm lost $4 billion (20% of its capital) due to the GameStop short squeeze.[8] As of April 2021, D1 recouped about 90% of its loss in January.[9]
In June 2021, the firm signed a 10-year lease to open another office in Miami.[11]
In May 2022, It was reported that the fund lost 23% of its value since the start of the year, with its public equities strategy losing 44%.[12]
In October 2024, it was reported that D1 gained 34% that year through September, after gaining 19% in 2023. D1 had made changes which included reducing its risk profile and increasing diversification of its investment coverage.[13]
As of the first quarter of 2025, D1 Capital's largest U.S.-listed long position was Maplebear Inc.[14]
Strategy and operations
D1 Capital Partners focuses on companies within the consumer, business services, financial services, healthcare, industrials, real estate, and technology, media and telecommunication sectors. Between June 2022 and April 2024, D1 Capital's public portfolio grew by 85%, following strategic shifts in risk management and increased stock diversification.[15]
Public strategy
D1 Capital Partners invests in publicly traded equities as well as related securities, including equity derivatives and convertible bonds. The firm employs a global long/short equity strategy focusing on generating medium- to long-term returns.[16]
Private strategy
In the private markets, D1 Capital Partners primarily takes later-stage non-controlling stakes in growth companies to support their expansion.[17] Notable private investments include Robinhood,[18] GitLab,[19] Instacart[20] and DriveNets
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