Insights

Strategic focus Targeting multi-specific active immunotherapies for sqNSCLC and other hard-to-treat cancers positions CelSiege as a niche partner for collaborators seeking innovative oncology biologics and resistance-overcoming strategies.

Early program upside Lead program CS-01 depleting EGF in squamous NSCLC suggests opportunities to engage with translational and clinical development partners, contract researchers, or CROs focused on targeted growth factor pathways.

Global reach Headquartered in Europe with U.S. operations indicates potential for cross-continental partnerships, tech transfer discussions, and co-development or licensing deals to accelerate clinical milestones.

Financial potential Current revenue and modest funding pointing to a lean, high-visibility investment target for strategic investors or pharma partnerships seeking early-stage biotech assets with clear unmet-need therapeutic areas.

Digital and ops readiness Existing tech stack and infrastructure (cloud, CRM, support, collaboration tools) supports scalable business development activities, partner due diligence, and efficient outreach to potential collaborators and suppliers.

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CelSiege Biosciences Tech Stack

CelSiege Biosciences uses 8 technology products and services including iCIMS, Amazon Web Services, Cloudflare, and more. Explore CelSiege Biosciences's tech stack below.

CelSiege Biosciences's Email Address Formats

CelSiege Biosciences uses at least 1 email format:
CelSiege Biosciences Email FormatsExamplePercentage
FLast@bakxtx.comJDoe@bakxtx.com
100%

Frequently Asked Questions

What is CelSiege Biosciences's official website and social media links?

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CelSiege Biosciences's official website is celsiege.com and has social profiles on LinkedIn and Crunchbase.

How much revenue does CelSiege Biosciences generate?

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As of August 2026, CelSiege Biosciences's annual revenue is estimated to be $1M - $10M.

What is CelSiege Biosciences's SIC code and NAICS code?

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CelSiege Biosciences's SIC code is 8731 - Commercial Physical and Biological Research and NAICS code is 541714 - Research and Development in Biotechnology (except Nanobiotechnology).

How many employees does CelSiege Biosciences have currently?

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As of August 2026, CelSiege Biosciences has approximately 5 employees across 2 continents, including North America and Asia. Key team members include Director Of Finance And Operations: J. M. Explore CelSiege Biosciences's employee directory with LeadIQ.

What industry does CelSiege Biosciences belong to?

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CelSiege Biosciences operates in the Biotechnology Research industry.

What technology does CelSiege Biosciences use?

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CelSiege Biosciences's tech stack includes iCIMS, Amazon Web Services, Cloudflare, Zendesk, Cloudflare DNS, Microsoft 365, Webflow and Piwik PRO Core.

What is CelSiege Biosciences's email format?

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CelSiege Biosciences's email format typically follows the pattern of FLast@bakxtx.com. Find more CelSiege Biosciences email formats with LeadIQ.

How much funding has CelSiege Biosciences raised to date?

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As of August 2026, CelSiege Biosciences has raised $25M in funding. The last funding round occurred on Nov 18, 2021 for $25M.

When was CelSiege Biosciences founded?

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CelSiege Biosciences was founded in 2025.
CelSiege Biosciences logo

CelSiege Biosciences

Biotechnology ResearchProvence-Alpes-Côte d'Azur, France2-10 Employees

CelSiege Biosciences is a biotechnology research company focused on developing multi-specific active immunotherapies aimed at providing lasting control for squamous non-small cell lung cancer and other challenging cancers. Its lead program, CS-01, is designed to selectively deplete an epidermal growth factor to address resistance to existing therapies in sqNSCLC, a patient population with limited recent treatment advances. Based in Marseille, France, with operations in the United States, the company brings together scientists, clinicians, and partners to pursue new therapeutics intended to be globally accessible for patients in need. The organization positions itself within the biotechnology research industry as a developer of first-in-class biologics built on a proprietary active immunotherapy platform, pursuing solutions for difficult-to-treat cancers.

Section iconCompany Overview

SIC Code
8731 - Commercial Physical and Biological Research
NAICS Code
541714 - Research and Development in Biotechnology (except Nanobiotechnology)
Founded
2025
Employees
2-10

Section iconFunding & Financials

  • $25M

    CelSiege Biosciences has raised a total of $25M of funding over 1 rounds. Their latest funding round was raised on Nov 18, 2021 in the amount of $25M as a Series A.

  • $1M - $10M

    CelSiege Biosciences's revenue is estimated to be in the range of $1M - $10M

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