aid: halda-therapeutics
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/halda-therapeutics.png
name: Halda Therapeutics
description: >-
  Halda Therapeutics was a clinical-stage biotechnology company and Yale
  University spinout developing oral, targeted cancer therapies built on its
  proprietary RIPTAC (Regulated Induced Proximity TArgeting Chimera) platform, a
  novel "hold and kill" modality for the precision treatment of solid tumors. Its
  lead program, HLD-0915, is a first-in-class oral RIPTAC therapeutic in
  development for metastatic castration-resistant prostate cancer (mCRPC), with
  earlier-stage candidates spanning breast, lung, and other tumor types. Backed by
  investors including Canaan Partners, Halda was acquired by Johnson & Johnson in
  2025 for approximately $3.05 billion in cash, with its platform folded into
  Johnson & Johnson Innovative Medicine's oncology pipeline. As a therapeutics
  developer, Halda operated no public developer platform, API, or documentation
  surface; this profile is maintained in the API Evangelist network as a company
  identity and portfolio-graph record rather than an API producer.
url: https://raw.githubusercontent.com/api-evangelist/halda-therapeutics/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
x-status: acquired
x-acquired-by: johnson-and-johnson
x-acquisition-value-usd: '3050000000'
x-acquisition-year: '2025'
x-industry: biotechnology
x-no-api-surface: 'true'
x-enrichment-note: >-
  Enrichment 2026-07-19: haldatx.com now redirects to jnj.com/innovativemedicine
  following the Johnson & Johnson acquisition. No public API, developer portal,
  documentation, SDK, or technical surface exists (searched). Identity-only
  enrichment; no API artifacts produced (no fabrication).
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Biotechnology
- Pharmaceuticals
- Oncology
- Cancer Therapeutics
- Prostate Cancer
- Drug Discovery
- Life Sciences
- Yale Spinout
apis: []
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