Reportedly reduced workforce by about 60% (34 employees) and refocused resources on lead candidate AB248.
SourcePublic company, workplace, funding, and market signals
Updated Jul 30, 2026
Asher Bio (Asher Biotherapeutics) is a clinical-stage, privately held biotechnology company founded in 2019 that develops cis-targeted immunotherapies designed to selectively activate specific immune cells and reduce off-target toxicity. Its lead product is etakafusp alfa (AB248), a CD8-targeted IL-2 immunotherapy in Phase 1 oncology studies; the broader pipeline includes AB821 and other cis-targeted cytokine programs.
Primary product
Etakafusp alfa (AB248), a CD8-targeted IL-2 immunotherapy
Founded
2019
Headquarters
650 Gateway Blvd. Suite 100, South San Francisco, CA 94080, USA
Team size
11-50
Work style
Flexible
Industry
Biotechnology Research
Sub-industry
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Cis-targeted immunotherapies / immuno-oncology cytokine fusion proteins
Offices
Business model
Stage
Series C
Total raised
$218.3M
Latest round
Series C · Apr 2024
Latest amount
$55M
Apr 2024 · RA Capital Management
Sep 2021 · Wellington Management Company LLP
Mar 2021 · Third Rock Ventures
Sep 2019
Aug 2019 · Y Combinator
Leadership
Founder, Chief Executive Officer, Board Member
Founder, Board Observer, Scientific Advisor
Consulting Chief Medical Officer
Consulting Chief Financial Officer / Chief Business Officer
Head of Operations
Founders
Robert Schreiber
Academic co-founder; Professor of Pathology & Immunology, Washington University School of Medicine
Ton Schumacher
Academic co-founder; Senior Member, Netherlands Cancer Institute; Professor of Immunotechnology, Leiden University
Mission-driven, entrepreneurial, and patient-focused. The company emphasizes rigorous decision-making, enthusiastic execution, inspired innovation, and seamless collaboration.
Work style
Flexible
Compensation
No public salary bands or compensation ranges were disclosed on the careers page; the careers page also states there are currently no open positions.
Benefits
Pricing
Not publicly disclosed; as a clinical-stage biopharma, the model appears to rely on equity financing, sponsored clinical collaborations, and eventual therapeutic commercialization/licensing.
Differentiators
Technology
Customers
Competitors
Estimated revenue
USD 1M-10M
Estimated monthly visits
2.3K
Traffic estimate as of Jul 2026
Reportedly reduced workforce by about 60% (34 employees) and refocused resources on lead candidate AB248.
SourceAsher Bio · May 2026
Announced ASCO 2026 presentations for AB248 and AB821, highlighting updated clinical data and early program design progress.
Asher Bio · Jan 2025
Announced an Amgen-sponsored clinical trial collaboration to test etakafusp alfa (AB248) with IMDELLTRA in extensive-stage small cell lung cancer.
Business Wire · Jan 2025
Announced a supply agreement with AstraZeneca to support a global NSCLC study of AB248 with rilvegostomig.
Asher Bio · Apr 2024
Closed a $55M Series C led by RA Capital Management with participation from AstraZeneca, Bristol Myers Squibb, Janus Henderson Investors, Third Rock Ventures, Wellington Management, Boxer Capital and others.
Asher Bio · Apr 2024
Announced publication of two Cancer Discovery manuscripts on AB248 design and preclinical data.