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quarterly holdings since 2021, from its SEC Form N-PORT filings, TickerInside, https://tickerinside.com/api/v1/quarterly/ibbq.json","answer":"In IBBQ's SEC filings, its largest position went from Moderna (MRNA) at 11.91% on 2021-08-31 to Gilead Sciences (GILD) at 7.39% on 2026-05-31, across 20 quarterly reports."}