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quarterly holdings since 2022, from its SEC Form N-PORT filings, TickerInside, https://tickerinside.com/api/v1/quarterly/thro.json","answer":"In THRO's SEC filings, its largest position went from Microsoft (MSFT) at 8.93% on 2022-01-31 to Apple Inc. (AAPL) at 8.16% on 2026-07-31, across 19 quarterly reports."}