SEC Filing Details Document Details Form 8-K Filing Date Dec 16, 2021 Document Date Dec 15, 2021 Form Description Report of unscheduled material events or corporate event Filing Group Current Reports Company Alpine Immune Sciences Filing Formats View HTML Download PDF Download DOC Download XLS XBRL XBRL Viewer EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA EX-101.LAB - XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT EX-101.PRE - XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT XML - XBRL INSTANCE DOCUMENT