| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated  | 
| Metastatic colorectal cancer with Acquired Resistance to Anti-EGFR Monoclonal Antibodies | 
 
 
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| E.1.1.1 | Medical condition in easily understood language  | 
 | 
| E.1.1.2 | Therapeutic area  | Diseases [C] - Cancer [C04] | 
| MedDRA Classification | 
| E.1.2 Medical condition or disease under investigation | 
| E.1.2 | Version  | 19.1 | 
 
| E.1.2 | Level  | LLT | 
 
| E.1.2 | Classification code  | 10052362 | 
 
| E.1.2 | Term  | Metastatic colorectal cancer | 
 
| E.1.2 | System Organ Class  | 100000004864 | 
 
 
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| E.1.3 | Condition being studied is a rare disease  |  No  | 
| E.2 Objective of the trial | 
| E.2.1 | Main objective of the trial  | 
To assess the efficacy of 2 different weekly dosing regimens (9 mg/kg
 loading dose followed by 6 mg/kg/week dose versus 12 mg/kg/week) of Sym004 compared with investigator`s choice in terms of overall survival time in subjects with metastatic colorectal cancer (mCRC). | 
 
 
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| E.2.2 | Secondary objectives of the trial  | 
- To assess the efficacy of the 2 different weekly dosing regimens of Sym004 in subjects with mCRC in terms of best overall response and progression-free survival time and time to treatment failure;
 - To determine the safety profile of the 2 different weekly dosing regimens;
 - To evaluate the dose intensity for the 2 different weekly dosing regimens;
 - To determine the pharmacokinetic (PK) profile;
 - To evaluate the occurrence of antidrug antibody (ADA);
 - To identify potential predictive biomarkers of response to treatment
 including but not limited to RAS pathway mutations, HER2 and MET
 status, EGFR and HER3 ligands plasma protein levels; tumor localization;
 - To evaluate quality of life | 
 
 
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| E.2.3 | Trial contains a sub-study  |  No  | 
| E.3 | Principal inclusion criteria  | 
- Written informed consent obtained before undergoing any study-related activities
 - Male or female, at least 18 years of age
 - Subjects with histologically or cytologically confirmed mCRC, KRAS WT at initial diagnosis
 - Failure of or intolerance to 5-FU, Oxaliplatin, and Irinotecan
 - Acquired resistance to marketed anti-EGFR mAbs as defined in the protocol
 - Measurable disease defined as one or more target lesions according to Response Evaluation Criteria in Solid Tumors (RECIST)
 - Life expectancy of at least 3 months
 - ECOG performance status ≤ 1
 - Other predefined inclusion criteria may apply | 
 
 
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| E.4 | Principal exclusion criteria | 
- Pretreatment with regorafenib
 - Subjects who in the opinion of the subject and investigator would benefit more from regorafenib treatment (except where regorafenib is not reimbursed in the country)
 - Skin rash Common Terminology Criteria for Adverse Events (CTCAE) Grade > 1 from previous anti-EGFR
 therapy at time of randomization
 - Magnesium < 0.9mg/dL
 - Known hypersensitivity to any of the treatment ingredients. Known previous Grade 3-4 infusion related
 reactions with anti-EGFR mABs
 - Other predefined exclusion criteria may apply | 
 
 
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| E.5 End points | 
| E.5.1 | Primary end point(s) | 
| The primary endpoint is overall survival (OS) | 
 
 
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| E.5.1.1 | Timepoint(s) of evaluation of this end point | 
| OS will be evaluated when 181 events of randomized patients are reported; expected in 2.5 years | 
 
 
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| E.5.2 | Secondary end point(s) | 
- Best overall response according to RECIST v1.1
 - Progression-free survival time
 - Time to treatment failure
 - number of subjects with AEs, serious AEs, treatment emergent AEs, AEs leading to death, and AEs with Grade >= 3 NCI-CTCAE (V.4.03)
 - Relative dose intensity
 - Pharmacokinetic profile (area under curve AUC 0-t, half-life, clearance, volume of distribution, C max, C trough, t max)
 - Host immune response, number of subjects with anti-drug antibodies (ADA)
 - Biomarkers: including but not limited to RAS pathway mutations, HER2
 and MET status, EGFR and HER3 ligand levels
 - Quality of life by subject reporting questionnaires using EORTC QLQ-C30 (version 3)
 - Quality of life by subject reporting questionnaires using EORTC QLQ-CR29
 - Quality of life by subject reporting questionnaires using FACT-EGFR18 | 
 
 
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| E.5.2.1 | Timepoint(s) of evaluation of this end point | 
Efficacy endpoints:
 - from randomization until first event, where an event can be a progression [radiologically confirmed or clinical progression] or death due to any cause, where death will only be considered as an event if it occurs within 12 weeks after last tumor response assessment without progression
 Biomarkers: 
 - as defined in the protocol
 Pharmacokinetics: 
 - as defined in the protocol
 Quality of life: 
 - every 3/6 weeks during the Treatment Period
 Safety endpoints: 
 - until 28 days after the last IMP administration or up to 21 months | 
 
 
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| E.6 and E.7 Scope of the trial | 
| E.6 | Scope of the trial | 
| E.6.1 | Diagnosis |  No  | 
| E.6.2 | Prophylaxis |  No  | 
| E.6.3 | Therapy |  Yes  | 
| E.6.4 | Safety |  Yes  | 
| E.6.5 | Efficacy |  Yes  | 
| E.6.6 | Pharmacokinetic |  Yes  | 
| E.6.7 | Pharmacodynamic |  No  | 
| E.6.8 | Bioequivalence |  No  | 
| E.6.9 | Dose response |  Yes  | 
| E.6.10 | Pharmacogenetic |  Yes  | 
| E.6.11 | Pharmacogenomic |  No  | 
| E.6.12 | Pharmacoeconomic |  No  | 
| E.6.13 | Others |  Yes  | 
| E.6.13.1 | Other scope of the trial description | 
 | 
| E.7 | Trial type and phase | 
| E.7.1 | Human pharmacology (Phase I) |  No  | 
| E.7.1.1 | First administration to humans |  No  | 
| E.7.1.2 | Bioequivalence study |  No  | 
| E.7.1.3 | Other |  No  | 
| E.7.1.3.1 | Other trial type description |  | 
| E.7.2 | Therapeutic exploratory (Phase II) |  Yes  | 
| E.7.3 | Therapeutic confirmatory (Phase III) |  No  | 
| E.7.4 | Therapeutic use (Phase IV) |  No  | 
| E.8 Design of the trial | 
| E.8.1 | Controlled |  Yes  | 
| E.8.1.1 | Randomised |  Yes  | 
| E.8.1.2 | Open |  Yes  | 
| E.8.1.3 | Single blind |  No  | 
| E.8.1.4 | Double blind  |  No  | 
| E.8.1.5 | Parallel group |  No  | 
| E.8.1.6 | Cross over  |  No  | 
| E.8.1.7 | Other |  No  | 
| E.8.2 |  Comparator of controlled trial | 
| E.8.2.1 | Other medicinal product(s) |  Yes  | 
| E.8.2.2 | Placebo  |  No  | 
| E.8.2.3 | Other |  No  | 
| E.8.2.4 | Number of treatment arms in the trial | 3 | 
| E.8.3 | 
                                The trial involves single site in the Member State concerned
                             |  Information not present in EudraCT  | 
| E.8.4 |  The trial involves multiple sites in the Member State concerned  |  Yes  | 
| E.8.5 | The trial involves multiple Member States |  Yes  | 
| E.8.5.1 | Number of sites anticipated in the EEA | 58 | 
| E.8.6 Trial involving sites outside the EEA | 
| E.8.6.1 | Trial being conducted both within and outside the EEA |  Yes  | 
| E.8.6.2 | Trial being conducted completely outside of the EEA |  No  | 
| E.8.6.3 | If E.8.6.1 or E.8.6.2 are Yes, specify the regions in which trial sites are planned | 
| Austria | 
 
| Belgium | 
 
| France | 
 
| Germany | 
 
| Hungary | 
 
| Italy | 
 
| Poland | 
 
| Russian Federation | 
 
| Spain | 
 
| United States | 
 
 
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| E.8.7 | Trial has a data monitoring committee |  Yes  | 
| E.8.8 | 
                        Definition of the end of the trial and justification where it is not the last
                        visit of the last subject undergoing the trial
                     | 
| Patients will be on study in survival follow-up extending up to 2 years after the last patient is randomized. If subjects remain on treatment beyond 2 years after last patient randomized, then 28 days after the last subject receives the last dose of trial treatment. | 
 
 
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| E.8.9 Initial estimate of the duration of the trial | 
| E.8.9.1 | In the Member State concerned years | 2 | 
| E.8.9.1 | In the Member State concerned months | 8 | 
| E.8.9.1 | In the Member State concerned days |  | 
| E.8.9.2 | In all countries concerned by the trial years | 2 | 
| E.8.9.2 | In all countries concerned by the trial months | 8 |