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Interactive Brokers shares owned by Custom Index Systems

Quarter-by-quarter ownership of Interactive Brokers (IBKR) shares owned by Custom Index Systems from 13F filings

Historical chart of Custom Index Systems investment in Interactive Brokers

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All positions including Interactive Brokers held by Custom Index Systems consolidated in one spreadsheet with up to 7 years of data

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Quarterly reported holdings in Interactive Brokers by Custom Index Systems

Quarter filed Position value Share count Share price at filing
2025-09-30 $809k 12k 68.81