BI 655130 Long-term Treatment in Patients With moderate-to Severe Ulcerative Colitis

Inclusion Criteria: * Male or female patients, aged ≥18 years * Signed and dated written informed consent for 1368.17, in accordance with GCP and local legislation prior to admission into the trial * Women of childbearing potential (WOCBP) must be ready to use highly effective methods of birth control per ICH M3 (R2) that result in a low failure rate of less than 1% per year when used consistently and correctly. A list of contraception methods meeting these criteria is provided in the patient information. Note: A woman is considered of childbearing potential (WOCBP), i.e. fertile, following menarche and until becoming postmenopausal unless permanently sterile. Permanent sterilisation methods include hysterectomy, bilateral salpingectomy and bilateral oophorectomy. Tuba ligation is NOT a method of permanent sterilisation. A postmenopausal state is defined as no menses for 12 months without an alternative medical cause. * Have completed treatment and the EOT visit in the previous trial and are willing and able to continue treatment in 1368.17. Exclusion Criteria: * Have experienced study treatment-limiting adverse events during induction treatment with study drug * Have developed any of the exclusion criteria from the original induction study with the following exceptions: * Cases of disease limited to the rectum extending \<15 cm past the anal verge are allowed to be included in study 1368.17 * Cases of latent TB. Patients with newly emerging latent TB during preceding study are allowed to be included in study 1368.17, provided they receive appropriate treatment according to local guidelines