| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated | 
| Fibrostenotic Crohn’s Disease |  | 
| E.1.1.1 | Medical condition in easily understood language |  | 
| E.1.1.2 | Therapeutic area | Diseases [C] - Digestive System Diseases [C06] | 
| MedDRA Classification | 
| E.1.2 Medical condition or disease under investigation | 
| 
| E.1.2 | Version | 20.0 |  
| E.1.2 | Level | PT |  
| E.1.2 | Classification code | 10011401 |  
| E.1.2 | Term | Crohn's disease |  
| E.1.2 | System Organ Class | 10017947 - Gastrointestinal disorders |  | 
| 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 demonstrate that spesolimab is effective in maintaining Symptomatic Stenosis Response and/or inducing Radiographic Stenosis Response in patients with symptomatic CD-related small bowel stenosis, who have achieved Symptomatic Stenosis Response after standard medical therapy. |  | 
| E.2.2 | Secondary objectives of the trial |  | 
| E.2.3 | Trial contains a sub-study | No | 
| E.3 | Principal inclusion criteria | 
| - Male and female patients, 18 to 75 years when signing informed consent at screening - Established diagnosis of clinical CD prior to screening
 - Suspicion of symptomatic small bowel stenosis, as defined by inclusion criteria 3 and 4
 - Presence of abdominal pain after eating or limitation in amount or types of food at screening
 - 1 or 2 naïve or anastomotic stenoses in the terminal ileum at screening, confirmed by MRE at randomization
 - Have achieved Symptomatic Stenosis Response before randomization (i.e. 7 day average scores <2 for diary questions on the abdominal pain after eating AND on the limitation in amount or types of food)
 - Endoscopic activity defined by Colonic Simple Endoscopic Score in CD (SES-CD) ≤12 after Lead-in Period, at the time of randomization
 
 |  | 
| E.4 | Principal exclusion criteria | 
| - No stenosis in reach of ileocolonoscopy - Systemic corticosteroid treatment of current obstructive symptoms for >1 week prior to screening
 - Endoscopic balloon dilation (EBD) or surgical treatment of the same small bowel stenosis within the last 6 months prior to screening Visit 1
 - More than 2 smal intestinal stenoses
 - Patients who require immediate EBD or surgical intervention as per the investigator´s discretion
 - Failure of >2 different biological drug classes prior to screening (e.g. TNF inhibitors, Integrin Receptor antagonists and
 IL-12 / IL-23 antagonists)
 - Current complications of CD at screening Visit 1 and randomization (Day 1) that would possibly confound the evaluation of benefit from treatment with spesolimab
 - Current stenosis in the colon
 - Previous strictureplasty on current stricture
 - Current ileostomy or colostomy
 - Any kind of bowel resection or diversion within 6 months of screening Visit 1
 - Any other intra-abdominal surgery (except for abscess drainage) within 3 months prior to screening Visit
 - Colorectal cancer (CRC) present and past (<5 years) history
 |  | 
| E.5 End points | 
| E.5.1 | Primary end point(s) | 
| 1) Proportion of patients with maintained Symptomatic Stenosis Response 2) Proportion of patients with Radiographic Stenosis Response
 |  | 
| E.5.1.1 | Timepoint(s) of evaluation of this end point |  | 
| E.5.2 | Secondary end point(s) | 
| 1) Proportion of patients with maintained Symptomatic Stenosis Response 2) Proportion of patients with Radiographic Stenosis Response
 
 |  | 
| E.5.2.1 | Timepoint(s) of evaluation of this end point |  | 
| 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 | No | 
| E.6.10 | Pharmacogenetic | No | 
| E.6.11 | Pharmacogenomic | Yes | 
| E.6.12 | Pharmacoeconomic | No | 
| E.6.13 | Others | No | 
| 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 | No | 
| E.8.1.3 | Single blind | No | 
| E.8.1.4 | Double blind | Yes | 
| E.8.1.5 | Parallel group | Yes | 
| 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) | No | 
| E.8.2.2 | Placebo | Yes | 
| E.8.2.3 | Other | No | 
| E.8.2.4 | Number of treatment arms in the trial | 2 | 
| E.8.3 | The trial involves single site in the Member State concerned | No | 
| E.8.4 | The trial involves multiple sites in the Member State concerned | Yes | 
| E.8.4.1 | Number of sites anticipated in Member State concerned | 8 | 
| E.8.5 | The trial involves multiple Member States | Yes | 
| E.8.5.1 | Number of sites anticipated in the EEA | 70 | 
| 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 | 
| Australia |  
| Brazil |  
| Canada |  
| China |  
| Hong Kong |  
| Israel |  
| Japan |  
| Korea, Republic of |  
| Mexico |  
| Taiwan |  
| United States |  
| Austria |  
| France |  
| Poland |  
| Sweden |  
| Netherlands |  
| Romania |  
| Spain |  
| Switzerland |  
| Germany |  
| Italy |  
| Belgium |  
| Denmark |  
| Hungary |  
| Ireland |  
| Norway |  
| Portugal |  
| Serbia |  
| United Kingdom |  | 
| 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 |  | 
| 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 | 9 | 
| E.8.9.1 | In the Member State concerned days | 3 | 
| 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 | 9 | 
| E.8.9.2 | In all countries concerned by the trial days | 3 |