Arresto Biosciences, Inc. was a privately-held, development-stage biotechnology company headquartered in Palo Alto, California, focused on medicines to treat fibrotic diseases and cancer by targeting enzymes involved in the synthesis of the extracellular matrix. Its lead product was AB0024, a humanized monoclonal antibody targeting the human lysyl oxidase-like-2 (LOXL2) protein, then in Phase I studies for idiopathic pulmonary fibrosis and advanced solid tumors. Founded circa 2007 and backed by Kleiner Perkins Caufield & Byers, HealthCare Ventures, Northgate Capital, DAG Ventures and Abbott Biotech Ventures, Arresto was acquired by Gilead Sciences for $225 million; the deal was announced December 20, 2010 and had closed by February 2011. The company no longer operates as an independent entity, publishes no developer or API surface, and its former domain (arrestobio.com) no longer resolves.
Arresto Biosciences is profiled on the APIs.io network. Tagged areas include Company, Healthcare, Biotechnology, Biopharmaceutical, and Life Sciences.
Regulatory Posture applies to this provider. Its tags matched the
Health regime, so
Regulatory Posture carries 15 points of the composite.
If this regime is wrong for your business, say so on your
provider repo — the
applicability map is public and we will correct it.
Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for
this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero:
never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and
several others — scorable at all.
The six quality facets above are damped to 85 points between them,
because the conditional facet above carries the other
15. That is why each facet's contribution is shown against a damped
maximum: raising a quality facet moves the composite by 85% of its nominal
weight, not 100%. The full arithmetic is at apis.io/rating/.
aid: arresto-biosciences
deliveryModel:
model: unknown
open_source: false
commercial: false
callable_host: false
label: Delivery model not determined — needs a product licence on record
confidence: low
source:
- none
generated: '2026-08-28'
method: derived
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/arresto-biosciences.png
name: Arresto Biosciences
description: Arresto Biosciences, Inc. was a privately-held, development-stage biotechnology company headquartered in Palo
Alto, California, focused on medicines to treat fibrotic diseases and cancer by targeting enzymes involved in the synthesis
of the extracellular matrix. Its lead product was AB0024, a humanized monoclonal antibody targeting the human lysyl oxidase-like-2
(LOXL2) protein, then in Phase I studies for idiopathic pulmonary fibrosis and advanced solid tumors. Founded circa 2007
and backed by Kleiner Perkins Caufield & Byers, HealthCare Ventures, Northgate Capital, DAG Ventures and Abbott Biotech
Ventures, Arresto was acquired by Gilead Sciences for $225 million; the deal was announced December 20, 2010 and had closed
by February 2011. The company no longer operates as an independent entity, publishes no developer or API surface, and its
former domain (arrestobio.com) no longer resolves.
url: https://raw.githubusercontent.com/api-evangelist/arresto-biosciences/refs/heads/main/apis.yml
x-api-posture: no-product-api
x-api-posture-basis: observed
x-type: company
x-source: vc-portfolio
x-backed-by:
- kleiner-perkins
x-status: acquired
x-status-detail: 'Acquired by Gilead Sciences (Nasdaq: GILD) for $225 million; announced 2010-12-20, closed Q1 2011. No longer
an independent operating company.'
x-acquisition:
acquirer: Gilead Sciences, Inc.
acquirer_slug: gilead-sciences
amount_usd: 225000000
announced: '2010-12-20'
closed_by: '2011-02-21'
source: https://www.sec.gov/Archives/edgar/data/882095/000129993310004530/exhibit1.htm
x-former-website: http://www.arrestobio.com
x-investors:
- Kleiner Perkins Caufield & Byers
- HealthCare Ventures
- Northgate Capital
- DAG Ventures
- Abbott Biotech Ventures
x-headquarters: Palo Alto, California, United States
x-lead-asset: AB0024, humanized monoclonal antibody targeting LOXL2
x-api-surface: none
x-api-surface-reason: Defunct pre-clinical biotechnology company; never published a public API, developer portal, or documentation.
Former domain does not resolve (no A/NS records, 2026-07-19).
x-tier: stub
x-tier-reason: defunct-acquired-no-api-surface
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Healthcare
- Biotechnology
- Biopharmaceutical
- Life Sciences
- Drug Discovery
- Oncology
- Fibrosis
- Monoclonal Antibodies
- Acquired
apis: []
common:
- type: ParentCompany
url: https://apis.io/providers/gilead-sciences/
name: Gilead Sciences
x-relationship: acquired
x-evidence: Founded circa 2007 and backed by Kleiner Perkins Caufield & Byers, HealthCare Ventures, Northgate Capital, DAG
Ventures and Abbott Biotech Ventures, Arresto was acquired by Gilead Sciences for $225 million; the deal was announced
December 2
- type: LLMsTxt
url: llms/arresto-biosciences-llms.txt
maintainers:
- FN: Kin Lane
email: kin@apievangelist.com
- FN: APIs.json
email: info@apis.io
x-enrichment:
date: '2026-07-19'
status: minimal
artifacts_added: 1
pass: local-v1
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