Investor Profile: D1 Capital Partners — Thesis, Cheque Size & How to Apply

Researching D1 Capital Partners funding leads you to one of the most deliberately low-profile giants in investing. D1 Capital Partners L.P. is a private global investment firm — a hedge fund with a large crossover private book — founded in July 2018 by Daniel Sundheim, previously Chief Investment Officer at Viking Global Investors for 15 years. The firm has no public website and publishes nothing about itself; reported AUM stood at US$24 billion in 2022 (dated — later coverage describes a $19–21bn multi-strategy manager, so treat current figures as unverified).

Investment thesis

The mandate is fundamentally-oriented, research-intensive investing across public and private markets, aiming to compound capital over the long term in "the world's best companies and management teams". The firm describes the model as combining the operational excellence of a large asset manager with the flexible mandate and long horizon of a family office.

Sectors, stages and cheque size

Sectors span consumer, business services, financial services, healthcare, industrials, real estate, and TMT (technology, media, telecom). On stages, D1 Capital Partners runs long/short public equities — a global long/short equity strategy using equity derivatives, convertibles and fixed income — alongside late-stage and growth private crossover investments: pre-IPO rounds and buyout-style minority stakes. This is not seed or Series A territory; it is a late-stage, pre-IPO cheque writer with a public-markets engine behind it.

Notable portfolio and leadership

The defining private bet was Instacart: D1 Capital Partners led its US$871 million financing (November 2018) and its US$600 million round (October 2018) at a US$7.6bn valuation, with Sundheim sitting on the board. Sundheim also served on the board of Collectors Universe. More recent reporting places Anthropic and OpenAI in the public book, with Lineage noted as a notable private exit via its IPO.

Daniel Sundheim is Founder and Chief Investment Officer — ex-Viking Global Investors CIO (15 years), previously at Bear Stearns Merchant Banking, Wharton BS Economics 1999. Amanda Hector is General Counsel and Chief Compliance Officer, named on SEC filings.

How to get funding from D1 Capital Partners

There is no public application route — no website, no pitch or application page. Founder access is via relationships and co-investors; a contact phone number historically listed for accredited investors is (212) 390-9100. For founders, the realistic path is through crossover co-investors already in the cap table at the pre-IPO stage.