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quarterly holdings since 2019, from its SEC Form N-PORT filings, TickerInside, https://tickerinside.com/api/v1/quarterly/vioo.json","answer":"In VIOO's SEC filings, its largest position went from Arrowhead Pharmaceuticals, Inc. (ARWR) at 0.90% on 2019-11-30 to Sanmina Corporation (SANM) at 0.83% on 2026-05-31, across 27 quarterly reports."}