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Business Alliances4888STELLA PHARMA CORPORATIONPharmaceuticals

Notice of the Signing of a Basic Agreement with QST Hospital, National Institutes for Quantum Science and Technology, Toward the Realization of New Particle Therapy

STELLA PHARMA CORPORATION entered into a basic agreement with QST Hospital to assess the feasibility of a new particle beam therapy by combining QST Hospital’s particle research facilities and expertise in particle beams with the Company’s expertise relating to its BNCT drug, “Steboronin®.” The parties will discuss entering into a joint research agreement covering activities from basic research through clinical trials and regulatory approval.

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Agreements reached under this partnership

Business Alliances
4888STELLA PHARMA CORPORATION
Alliance partnerNational Institutes for Quantum Science and Technology (QST), QST Hospital
Details of the alliance
  1. 1

    Consideration of entering into a joint research agreement covering basic research, nonclinical studies, clinical trials and other activities directed toward regulatory approval

  2. 2

    Verification of the feasibility of a new cancer treatment technology combining “Steboronin®” with “particle beams other than neutron beams”

These are items that the documents state the two companies will work on. The lines above and below represent arrangements between the two companies.

About the partner
Business DescriptionQST is a national research and development agency engaged in research and development relating to radiation medicine and quantum science and technology. QST Hospital provides radiation-based medical care, including heavy-ion cancer treatment, and conducts research and development. It operates particle research facilities.
LocationChiba, Chiba Prefecture
Impact on Business Performance

The impact of this matter on the Company’s results for the fiscal year ending March 2027 will be limited.

Contract Date28 July 2026
Agreements reached under this partnership
ItemDetails
Name of alliance partnerNational Institutes for Quantum Science and Technology (QST), QST Hospital
Alliance partner's business activitiesQST is a national research and development agency engaged in research and development relating to radiation medicine and quantum science and technology. QST Hospital provides radiation-based medical care, including heavy-ion cancer treatment, and conducts research and development. It operates particle research facilities.
Alliance partner's locationChiba, Chiba Prefecture
Type of allianceBusiness Alliances
Details of the allianceConsideration of entering into a joint research agreement covering basic research, nonclinical studies, clinical trials and other activities directed toward regulatory approval, Verification of the feasibility of a new cancer treatment technology combining “Steboronin®” with “particle beams other than neutron beams”
Contract Date28 July 2026
Impact on Business PerformanceThe impact of this matter on the Company’s results for the fiscal year ending March 2027 will be limited.
Items this document does not state (16)
Alliance partner's capitalAlliance partner's net salesAlliance partner's operating incomeNumber of shares acquiredAcquisition priceShareholding ratioOverview of the joint ventureOwnership ratioDispatch of directors and officersContract PeriodNumerical targets under the allianceShareholding PolicyDate of board resolutionAlliance start dateShare Acquisition Date and Payment DateChange in major shareholders

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The reasons the company gives

The company's own explanation, not something inferred from the numbers.

To assess the feasibility of a new cancer treatment technology by combining QST Hospital’s research infrastructure and expertise relating to particle research facilities and particle beams with the Company’s expertise in the research and development, manufacturing and regulatory affairs of boron-based pharmaceuticals.

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Notice of the Signing of a Basic Agreement with QST Hospital, National Institutes for Quantum Science and Technology, Toward the Realization of New Particle Therapy | STELLA PHARMA CORPORATION (4888) timely disclosure | Komori