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quarterly holdings since 2019, from its SEC Form N-PORT filings, TickerInside, https://tickerinside.com/api/v1/quarterly/iwm.json","answer":"In IWM's SEC filings, its largest position went from NovoCure Limited (NVCR) at 0.33% on 2019-09-30 to Moog Inc. Class A (MOG.A) at 0.38% on 2026-06-30, across 28 quarterly reports."}