Purple Biotech Completes Public Offering of Up to $18 Million, Securing $6 Million Initially with Potential for an Additional $12 Million from Short-Term Warrant Exercises
Public Offering Announcement: Purple Biotech Ltd. has closed a public offering of 5,999,999 American Depositary Shares (ADSs) at $1.00 per share, raising approximately $6 million, with potential additional proceeds of $12 million from short-term warrants.
Use of Proceeds: The company plans to utilize the net proceeds for the development of its oncology therapeutic candidates and for general working capital and corporate purposes.
Company Overview: Purple Biotech is a clinical-stage company focused on developing therapies to combat tumor immune evasion and drug resistance, with a pipeline that includes CAPTN-3, CM24, and NT219.
Forward-Looking Statements: The press release includes forward-looking statements regarding the exercise of warrants and the anticipated use of proceeds, highlighting the inherent risks and uncertainties in drug development and commercialization.
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Purple Biotech Reports Significant Anti-Tumor Activity of CAPTN-3 Platform at ESMO IO 2025
- Significant Anti-Tumor Activity: Purple Biotech's CAPTN-3 platform demonstrates substantial anti-tumor activity through its tri-specific antibodies IM1240 and IM1305 across different tumor antigens, particularly showing strong efficacy in PD-1 resistant models, indicating the platform's potential applicability in various solid tumors.
- Key Role of NKG2A Arm: Transcriptomic analysis of approximately 11,000 TCGA samples reveals a strong correlation between NKG2A expression and tumor expression of 5T4 or TROP2, supporting the inclusion of the NKG2A arm in CAPTN-3 designs, which enhances anti-cancer immune activity, especially in PD-1 resistant patient-derived samples.
- Platform Adaptability Validation: The new candidate IM1305, targeting TROP2, shows high-affinity binding (EC₅₀ ~2 nM) and potent PBMC-mediated tumor cell killing across multiple tumor types, further validating the adaptability and broad application potential of the CAPTN-3 platform, particularly in triple-negative breast cancer.
- Future Development Roadmap: Purple Biotech plans to advance CAPTN-3 toward IND-enabling studies in 2026, demonstrating the company's strategic commitment to addressing tumor immune evasion and drug resistance, aiming to capture market opportunities through continuous innovation.

Purple Biotech Reports New Anti-Tumor Data from CAPTN-3 Platform
- Significant Anti-Tumor Activity: Purple Biotech's CAPTN-3 platform demonstrates substantial anti-tumor activity through its tri-specific antibodies IM1240 and IM1305 across different tumor antigens, particularly showing strong apoptosis induction in PD-1 resistant models, indicating the platform's potential applicability in various solid tumors.
- Key Role of NKG2A Arm: Transcriptomic analysis of approximately 11,000 TCGA samples reveals a strong correlation between NKG2A expression and the expression of tumor antigens 5T4 or TROP2, supporting the inclusion of the NKG2A arm in CAPTN-3 designs, thereby enhancing anti-cancer immune activity, especially in PD-1 resistant patient-derived samples.
- Platform Adaptability Validation: The new candidate IM1305 exhibits high affinity binding to both TROP2 and NKG2A, achieving potent tumor cell killing at low concentrations (EC₅₀ 1-5 pM) across multiple tumor types, further validating the adaptability and broad application potential of the CAPTN-3 platform.
- Future Development Roadmap: Purple Biotech plans to advance the CAPTN-3 platform toward IND-enabling studies in 2026, with CEO Gil Efron emphasizing that the platform's multifunctional mechanisms will help overcome immune evasion challenges in solid tumor treatments, showcasing strong market prospects.






