aid: day-one-biopharmaceuticals
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://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/day-one-biopharmaceuticals.png
name: Day One Biopharmaceuticals
description: >-
  Day One Biopharmaceuticals is a commercial-stage biopharmaceutical company developing and
  commercializing targeted therapies for people of all ages living with life-threatening diseases,
  with an initial focus on pediatric and rare cancers. Its lead product OJEMDA (tovorafenib) is an
  FDA-approved treatment for relapsed or refractory pediatric low-grade glioma, and its pipeline
  includes DAY301 and the antibody-drug conjugate Emi-Le. Headquartered in Brisbane, California, the
  company was acquired by and is now part of the Servier Group as of March 2026. Day One was surfaced
  as a portfolio company of Canaan Partners and added to the API Evangelist network; it maintains a
  corporate and investor-relations web presence but publishes no public developer API, SDK, or
  programmatic surface.
url: https://raw.githubusercontent.com/api-evangelist/day-one-biopharmaceuticals/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- canaan-partners
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Biopharmaceutical
- Oncology
- Pediatric Cancer
- Rare Disease
- Pharmaceuticals
- Biotechnology
- Life Sciences
- Servier Group
apis: []
common:
- type: DomainSecurity
  url: security/day-one-biopharmaceuticals-domain-security.yml
- type: WellKnown
  url: well-known/day-one-biopharmaceuticals-well-known.yml
- type: LLMsTxt
  url: llms/day-one-biopharmaceuticals-llms.txt
- type: Website
  url: https://www.dayonebio.com
- type: PrivacyPolicy
  url: https://www.dayonebio.com/privacy-notice
- type: TermsOfService
  url: https://www.dayonebio.com/terms-of-use
- type: Support
  name: Contact Us
  url: https://www.dayonebio.com/our-company/contact-us/
- type: Investors
  url: https://ir.dayonebio.com/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence