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 50 publish APIs here 4 properties

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

Portfolio Strength across 50 profiled portfolio companies on the network

8 top-rated API companies 5 exemplar · 3 strong

15 agent-ready companies 3 agent-native · 12 agent-ready

Average quality of the book:

Composite emerging 29.5

Agent-Readiness agent-aware 20.0

Firms are ranked by cumulative portfolio strength — how many highly-rated API companies they've backed, weighted by tier across composite quality and agent-readiness. The averages below are a secondary read on the typical company in the book.

D1 Capital Partners has 50 portfolio companies tracked on the APIs.io network, of which 50 (100%) publish APIs indexed here.

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

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 5 Complete, well-documented, and agent-ready

Stripe 159 APIs 84.7 Anthropic 24 APIs 75.0 GitLab 44 APIs 74.3 Airtable 12 APIs 70.9 OpenAI 51 APIs 69.0

Strong 3 Solid coverage with minor gaps

Unity Technologies 33 APIs 65.2 Ramp 11 APIs 64.3 Genesys 87 APIs 59.0

Developing 8 Usable, with meaningful gaps to close

Squarespace 7 APIs 53.0 Revolut 46 APIs 51.1 Robinhood 5 APIs 47.4 Groq 9 APIs 47.3 Wise 47 APIs 47.0 dLocal 17 APIs 46.0 SpaceX 11 APIs 45.0 Cognition 8 APIs 43.9

Thin 8 Limited public surface area

Instacart 10 APIs 41.7 Gopuff 6 APIs 40.1 Bolt 3 APIs 35.8 Collectors 1 API 33.8 OneStream 1 API 32.7 Procore 1 API 32.4 Highspot 2 APIs 31.3 Lacework 1 API 28.7

Emerging 7 Early or largely undocumented

ByHeart 24.2 Alkami 1 API 21.0 Lineage 17.5 Ualá 1 API 16.2 DriveNets 15.0 Multiverse 14.8 Faire 2 APIs 14.2

Minimal 19 Almost no public developer surface

Loft 12.5 Dream11 12.3 Guild 12.3 Urbanic 11.9 Imperative Care 11.6 CelLink 11.3 Course Hero 10.8 Geek+ 10.5 Rivian 10.2 VulcanForms 9.7 Warby Parker 8.9 SmartRent 6.8 Cazoo 6.1 SalioGen Therapeutics 5.4 Zetwerk 5.4 Absci 5.0 Foxtrot 5.0 Sweetgreen 5.0 Zomato 4.1

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.
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
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