The purpose of this study is to determine the appropriate dosage, safety and effectiveness of a new study drug IPN01195 in adults with advanced solid tumours.

The participants in this study will have advanced solid tumours. 'Advanced solid tumours' refers to cancers that can occur in several places, including cancers in organs or tissues that have spread from their original site to nearby tissues or other parts of the body.

The study consists of two phases, called phase I and phase II.

Phase I will be conducted in two parts:

Part A: Phase I Part A study (dose escalation) is designed to find the dose range showing activity on the tumour that can be tolerated by the participants by testing different doses of IPN01195.

Part B: Phase I Part B of the study (dose confirmation) will assess the ability of study drug to prevent, slow down, or stop the growth of tumours (abnormal cell growths that can lead to cancer) and how the body processes and responds to the study drug when administered in a "low dose" or "high dose" and further explore the safety and tolerability.

These parts will consist of the following periods:

• A period to assess eligibility (screening period).
• A treatment period that will require at least two visits for the first month followed by one visit every month. There will be also one visit, at the end of treatment, at 30 days after the last administration of study drug.

An assessment visit will be required every 6 weeks up to Week 24 and every 12 weeks thereafter to measure the tumour again and to assess how it is evolving, whether it is getting bigger, smaller, is stable or has gone away.

Based on the results obtained from phase I, a phase II extension study will be included through to an updated study plan, to further evaluate the study drug.

In both study phases, participants will undergo blood samplings, urine collections, physical examinations and clinical evaluations. They may continue some other medications, but the details need to be recorded.

Inclusion Criteria:

• Participants must be ≥18 years of age or the country's legal age of majority if the legal age is more than 18 years at the time of signing the informed consent.
• Participants with histologically confirmed metastatic solid tumour for whom no suitable alternative standard therapy exists.
• Participants must bear tumours harbouring selected classes of genetic alterations of MAPK pathway based on an analytically validated assay performed by an accredited laboratory.
• Part A: Participants must consent to the use of archival tumour tissue or, if not available, collection of fresh tumour biopsy at screening, for central confirmation of mutation status.
• Part B: Participants must consent to the use of archival tumour tissue or, if not available, collection of fresh tumour biopsy at screening, for MAPK genomic testing to confirm eligibility.
• Participants must have measurable disease per Response Evaluation Criteria in Solid Tumours (RECIST) version 1.1
• Eastern Cooperative Oncology Group (ECOG)/performance status (PS) of 0 or 1
• Contraceptive use by men or women should be consistent with local regulations regarding the methods of contraception for those participating in clinical studies.
• Capable of giving signed informed consent which includes compliance with the requirements and restrictions listed in the informed consent form (ICF) and in this protocol.

Exclusion Criteria:

• Gastrointestinal conditions that could impair absorption of IPN01195 (specific cases e.g. remote history of gastrointestinal surgery, may be enrolled after discussion with the medical monitor)

• Any evidence of severe active infection or inflammatory condition.

• Non-adequate cardiac function

• Known psychiatric or substance abuse disorder, or any other cognitive disorder per the opinion of the investigator that would interfere with the participant's ability to cooperate with the requirements of the study.

• Underlying medical conditions that, in the investigator's or sponsor's opinion, will obscure the interpretation of toxicity determination or AEs.

• Known second malignancy either progressing or requiring active treatment within the last 2 years prior to first dose of the study intervention.

• Active brain metastases or leptomeningeal

• Current enrolment or past participation in any other clinical studies involving an investigational study treatment within the last 28 days

• Live vaccine(s) within 28 days prior to first dose of the study intervention or plan to receive such vaccines during the study.

• Concurrent treatment with any other anti-cancer therapy (including radiotherapy or investigational agents).

• Washout period of less than 28 days prior anti-cancer therapy (including chemotherapy, targeted agents, radiotherapy). If the participant was treated with an agent having a short half-life, washout can be <28 days but not shorter than 5 times the half-life.

• Condition requiring systemic treatment with either corticosteroids (>10 mg daily prednisone equivalents) or other immunosuppressive medications within 2 weeks prior to first dose of the study intervention.

• Non-adequate bone marrow function

• Non-adequate renal function

• Non-adequate hepatic function

• Known human immunodeficiency virus (HIV) infection. HIV testing will be performed in any countries where mandatory per local requirements.

• Known uncontrolled or untreated hepatitis infection.

  • (a) Known uncontrolled hepatitis B virus (HBV) infection.
  • (b) Known untreated current hepatitis C virus (HCV) infection.

• Sensitivity to IPN01195 or any of its components.

Qualified researchers may request access to patient level data and related study documents including the clinical study report, study protocol with any amendments, annotated case report form, statistical analysis plan, and dataset specifications.

Patient level data will be anonymized and study documents will be redacted to protect the privacy of study participants.

Where applicable, data from eligible studies are available 6 months after the studied medicine and indication have been approved in the US and/or EU.

Further details on Ipsen's sharing criteria and process for sharing are available here (https://www.ipsen.com/science/clinical-trials/clinical-data-transparency/).