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Note 2 - Significant Accounting Policies - Activity in Number and Value of Shares Created and Redeemed (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2026 | Mar. 31, 2025 | Mar. 31, 2026 | Mar. 31, 2025
Activity in Number of Shares Created and Redeemed: |  |  |  |
Creations (in shares) | 34,900,000 | 38,500,000 | 74,800,000 | 57,300,000
Redemptions (in shares) | (6,700,000) | (2,100,000) | (25,400,000) | (17,700,000)
Net Change in Number of Shares Created and Redeemed (in shares) |  |  | 49,400,000 | 39,600,000
Activity in Value of Shares Created and Redeemed: |  |  |  |
Creations | $ 3,335,199 | $ 2,241,476 | $ 6,658,061 | $ 3,235,706
Redemptions | $ (658,530) | $ (118,064) | (2,233,429) | (944,204)
Net change in Value of Shares Created and Redeemed |  |  | $ 4,424,632 | $ 2,291,503
SPDR Gold Mini Shares Trust [Member] |  |  |  |
Activity in Number of Shares Created and Redeemed: |  |  |  |
Creations (in shares) | 34,900,000 | 38,500,000 | 74,800,000 | 57,300,000
Redemptions (in shares) | (6,700,000) | (2,100,000) | (25,400,000) | (17,700,000)
Net Change in Number of Shares Created and Redeemed (in shares) |  |  | 49,400,000 | 39,600,000
Activity in Value of Shares Created and Redeemed: |  |  |  |
Creations | $ 3,335,199 | $ 2,241,476 | $ 6,658,061 | $ 3,235,706
Redemptions | $ (658,530) | $ (118,064) | (2,233,429) | (944,204)
Net change in Value of Shares Created and Redeemed |  |  | $ 4,424,632 | $ 2,291,503

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