No history of any prior stroke (hemorrhagic or ischemic) History of stroke within 6 months. Stroke. Known history of stroke or cerebrovascular accident within 6 months before enrollment. Any history of hemorrhagic stroke History or evidence of central nervous system bleeding as defined by stroke or intraocular bleed (including embolic stroke) not associated with any antitumor surgery within 6 months before enrolment Stroke, serious cardiac arrhythmia within the 6 months prior to study drug administration History of ischemic stroke within 6 months prior to enrollment. History of hemorrhagic or ischemic stroke within the last 6 months Previous stroke < 12 months History of stroke within the last 5-years History of stroke or cerebral hemorrhage within 2 months History of central nervous system bleeding as defined by stroke or intraocular bleed within 6 months of enrollment. History of stroke or cerebral hemorrhage within 6 months History of stroke or cerebral hemorrhage within 2 month Patient with stroke in the last 3 months History of stroke within 6 months History of stroke within 6 months History (within the last 3 months) or presence of stroke/cerebrovascular accident TIA or stroke in the last 1 month. TIA or stroke in the last 1 month History of stroke within six months History of cerebral vascular accident or stroke within the previous 2 years Known history of stroke or cerebrovascular accident within 6 months prior to enrollment History of thrombotic or hemorrhagic stroke or myocardial infarction within 6 months. Stroke or other symptoms of cerebral vascular insufficiency within the last 3 months. History of stroke or cerebral hemorrhage within 6 months Known history of stroke or cerebrovascular accident within 6 months prior to enrollment Known history of stroke or cerebrovascular accident within 6 months prior to enrollment History of stroke or cerebral hemorrhage within 2 months Known history of stroke or cerebrovascular accident within 6 months prior to the first dose of study drug PART B: Any history of myocardial infarction or embolic/occlusive cerebro-vascular accident (stroke) History of stroke within 6 months prior to study registration History of stroke within 6 months of registration History of stroke within 6 months prior to day 1 History of stroke Known history of stroke or cerebrovascular accident within 6 months prior to the first dose of protocol therapy. Known history of stroke or cerebrovascular accident within 6 months prior to the first dose of study drug. 5. Known history of stroke or cerebrovascular accident within 6 months prior to the first dose of study drug. Known history of stroke or cerebrovascular accident within 6 months. History of stroke within 6 months History of hemorrhagic or ischemic stroke within 6 months prior to first dose of mirvetuximab soravtansine Hemorrhagic, embolic, or thrombotic stroke within 6 months of scheduled dosing day 1; History of stroke within 6 months prior to study enrollment. History of a prior symptomatic stroke, dementia, or other significant central neurologic condition (i.e. multiple sclerosis) History of stroke within six months History (within the last 6 months) or presence of stroke/cerebrovascular accident History of stroke or cerebral hemorrhage within 2 months EXCLUSION - STUDY 1: Stroke Stroke within the past 2 years History of stroke No history of hemorrhagic stroke stroke (within the last 6 month) History of bleeding disorder or hemorrhagic stroke Stroke in the last six months History of severe brain-injury or stroke. History of bleeding disorder or hemorrhagic stroke History of cerebrovascular accident (stroke) Stroke or TIA within 12 last months History of stroke with the past year History of thrombotic or hemorrhagic stroke or myocardial infarction within 6 months