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quarterly holdings since 2022, from its SEC Form N-PORT filings, TickerInside, https://tickerinside.com/api/v1/quarterly/ibrn.json","answer":"In IBRN's SEC filings, its largest position went from Prothena Corporation plc (PRTA) at 7.28% on 2022-10-31 to Dianthus Therapeutics, Inc. (DNTH) at 5.34% on 2026-07-31, across 16 quarterly reports."}