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quarterly holdings since 2020, from its SEC Form N-PORT filings, TickerInside, https://tickerinside.com/api/v1/quarterly/qtum.json","answer":"In QTUM's SEC filings, its largest position went from 8036.JP at 1.88% on 2020-03-31 to Arqit Quantum Inc. (ARQQ) at 2.41% on 2026-06-30, across 26 quarterly reports."}