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quarterly holdings since 2019, from its SEC Form N-PORT filings, TickerInside, https://tickerinside.com/api/v1/quarterly/idna.json","answer":"In IDNA's SEC filings, its largest position went from SGEN at 6.43% on 2019-10-31 to Bayer AG (BAYN.DE) at 4.81% on 2026-07-31, across 28 quarterly reports."}