About Celares
Celares is a Healthcare company based in Berlin (Germany) founded in 2003 by Ralf Kraehmer, Frank Leenders, and Guenther Paetz, and was acquired by Biosynth in July 2023. Drug delivery systems using PEGylation for biopharmaceuticals are developed. Its focus areas include Life Sciences, Life Sciences Platforms and Tools, Research Services and Diversified.
Company details
Celares was founded in 2003 in Berlin, Germany, within the biopharmaceutical sector. PEGylation technologies are focused on for enhancing peptide and protein drugs through prolonged half-life, reduced immunogenicity, and improved stability. Patent applications are held for branched, monodispersed PEG reagents. Contract development services and customized reagent synthesis are also provided to support biopharmaceutical operations.
- Headquarters Berlin, Germany
- Founders Ralf Kraehmer, Frank Leenders, Guenther Paetz
- Stage Acquired
- SectorsHealthcare
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- Website celares.com
- Acquired by Biosynth (Jul 2023)
Investors in Celares
Celares has secured backing from 1 investor. Prominent investors backing the company include Biosynth.
| Investor | Description | Founded Year | Domain | Location |
|---|---|---|---|---|
Biosynth is engaged in supplying critical raw materials and services for life sciences and diagnostics. | 1966 | biosynth.com | Thal, Switzerland |
Investor details for Celares
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People of Celares
3 people are tracked at Celares (3 in leadership).
| Name | Role | Group |
|---|---|---|
Ralf Kraehmer | Co-Founder & CSO | Leadership |
Frank Leenders | Co-Founder & Managing Director | Leadership |
Guenther Paetz | Co-Founder | Leadership |
Complete people profiles for Celares
Full employee and board profiles, team structure, tenure and professional contact details require an active premium plan.
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Timeline of Celares
2 dated milestones of Celares across 20 years, from founding to its latest funding, stage changes and deals.
- Founded Celares is founded.
- Exit Acquired by Biosynth.
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Related news about Celares
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Frequently Asked Questions about Celares
Celares was founded in 2003.
Celares is headquartered in Berlin, Germany. It is registered at Berlin, Berlin, Germany.
Celares was founded in 2003 in Berlin, Germany, within the biopharmaceutical sector. PEGylation technologies are focused on for enhancing peptide and protein drugs through prolonged half-life, reduced immunogenicity, and improved stability. Patent applications are held for branched, monodispersed PEG reagents. Contract development services and customized reagent synthesis are also provided to support biopharmaceutical operations.
Celares has 1 investor. Key investors include Biosynth.
Yes. Celares was acquired by Biosynth in July 2023.

