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quarterly holdings since 2019, from its SEC Form N-PORT filings, TickerInside, https://tickerinside.com/api/v1/quarterly/iwr.json","answer":"In IWR's SEC filings, its largest position went from Fiserv (FISV) at 0.77% on 2019-09-30 to Datadog (DDOG) at 0.62% on 2026-06-30, across 28 quarterly reports."}