Growth Equity

D1 Capital Partners

D1 Capital Partners is a New York City-based global investment firm founded in July 2018 by Daniel Sundheim, the former Chief Investment Officer of Viking Global Investors, who seeded the firm with more than $500 million of his own capital. The name "D1" references Amazon founder Jeff Bezos's "Day One" philosophy. D1 deploys capital across both public and private markets: in public markets it runs a global long/short equity strategy (including equity derivatives and convertible bonds) targeting medium- to long-term returns, while in private markets it takes later-stage, non-controlling growth-equity stakes in expanding companies. The firm's private portfolio spans consumer, business services, financial services, healthcare, industrials, real estate, and technology, media and telecommunications, with notable positions in companies such as SpaceX, Stripe, Anthropic, OpenAI, Ramp, Robinhood, GitLab, and Instacart. As a "Tiger Cub" descended from Viking Global, D1 grew from roughly $3 billion at launch to more than $20 billion by the end of 2020, and has been reported managing on the order of $24 billion in assets. It is headquartered at 9 West 57th Street in Manhattan.

50 portfolio companies 22 publish APIs here 4 properties

Venture Capital Growth Equity Crossover Later Stage Fintech Artificial Intelligence Technology Consumer Healthcare New York Global

D1 Capital Partners has 50 portfolio companies tracked on the APIs.io network, of which 22 (44%) publish APIs indexed here.

Its highest-rated API providers on the network are Stripe, Anthropic, Airtable, OpenAI, GitLab.

Portfolio on the Network

Portfolio companies that publish APIs indexed on APIs.io, grouped by their API Evangelist rating. Exemplar and Strong are expanded by default.

Exemplar 2 Complete, well-documented, and agent-ready

Stripe 57 APIs 80.1 Anthropic 11 APIs 72.6

Strong 4 Solid coverage with minor gaps

Airtable 6 APIs 67.7 OpenAI 25 APIs 67.0 GitLab 41 APIs 64.6 Unity Technologies 27 APIs 63.4

Developing 3 Usable, with meaningful gaps to close

Ramp 1 API 58.9 Squarespace 7 APIs 52.8 dLocal 4 APIs 50.1

Thin 8 Limited public surface area

SpaceX 1 API 42.6 Groq 13 APIs 42.5 Wise 10 APIs 40.8 Gopuff 2 APIs 38.6 Instacart 5 APIs 37.6 Cognition 1 API 36.6 Bolt 4 APIs 35.4 Highspot 2 APIs 33.7

Emerging 5 Early or largely undocumented

Lacework 1 API 29.8 Procore 1 API 24.0 Revolut 4 APIs 22.0 Ualá 1 API 19.5 Faire 2 APIs 15.9

Rest of Portfolio

28 further portfolio companies that don’t yet have a provider page on the network.

AbsciAlkamiByHeartCazooCelLinkCollectorsCourse HeroDream11DriveNetsFoxtrotGeek+GenesysGuildImperative CareLineageLoftMultiverseOneStreamRivianRobinhoodSalioGen TherapeuticsSmartRentSweetgreenUrbanicVulcanFormsWarby ParkerZetwerkZomato

Scroll for all 28

Properties

Portfolio

Where the firm publishes its investments

Portfolio

Portfolio

Firm

The firm itself

Website

Website

Crunchbase

Crunchbase

LinkedIn

Source (apis.yml)

aid: d1-capital
name: D1 Capital Partners
description: >-
  D1 Capital Partners is a New York City-based global investment firm founded in
  July 2018 by Daniel Sundheim, the former Chief Investment Officer of Viking
  Global Investors, who seeded the firm with more than $500 million of his own
  capital. The name "D1" references Amazon founder Jeff Bezos's "Day One"
  philosophy. D1 deploys capital across both public and private markets: in
  public markets it runs a global long/short equity strategy (including equity
  derivatives and convertible bonds) targeting medium- to long-term returns,
  while in private markets it takes later-stage, non-controlling growth-equity
  stakes in expanding companies. The firm's private portfolio spans consumer,
  business services, financial services, healthcare, industrials, real estate,
  and technology, media and telecommunications, with notable positions in
  companies such as SpaceX, Stripe, Anthropic, OpenAI, Ramp, Robinhood, GitLab,
  and Instacart. As a "Tiger Cub" descended from Viking Global, D1 grew from
  roughly $3 billion at launch to more than $20 billion by the end of 2020, and
  has been reported managing on the order of $24 billion in assets. It is
  headquartered at 9 West 57th Street in Manhattan.
image: https://logo.clearbit.com/d1capital.com
x-type: venture-capital
x-category: Growth Equity
tags:
  - Venture Capital
  - Growth Equity
  - Crossover
  - Later Stage
  - Fintech
  - Artificial Intelligence
  - Technology
  - Consumer
  - Healthcare
  - New York
  - Global
created: '2026-07-17'
modified: '2026-07-17'
specificationVersion: '0.20'
apis: []
common:
  - type: Website
    url: https://www.d1capital.com
  - type: Portfolio
    url: portfolio/d1-capital-portfolio.yml
  - type: Crunchbase
    url: https://www.crunchbase.com/organization/d1-capital-partners
  - type: LinkedIn
    url: https://www.linkedin.com/company/d1-capital-partners
  - type: Features
    data:
      - 'Firm type: Global investment firm / crossover hedge fund (Tiger Cub)'
      - 'Strategy: Public long/short equity + private later-stage growth equity'
      - 'Stage (private): Later stage, growth, pre-IPO'
      - 'Investment type: Non-controlling minority stakes'
      - >-
        Sectors: consumer, business services, financial services, healthcare,
        industrials, real estate, technology media & telecommunications
      - 'Geography: Global (US-led, with Europe, Latin America and Asia)'
      - 'AUM: ~$24 billion (reported)'
      - 'Founded: July 2018'
      - 'Founder / CIO: Daniel Sundheim'
      - 'HQ: 9 West 57th Street, New York, NY'
    sources:
      - https://en.wikipedia.org/wiki/D1_Capital_Partners
      - https://www.crunchbase.com/organization/d1-capital-partners
    updated: '2026-07-17'
maintainers:
  - FN: Kin Lane
    email: kin@apievangelist.com
    url: https://apievangelist.com
  - FN: APIs.json
    url: http://apisjson.org
  - FN: D1 Capital Partners
    url: https://www.d1capital.com