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Contract OI history

Back to BRK.B

Nov 20, 2026 EXPIRATION

BRK.B $485.00 Put

BRKB261120P00485000

Latest saved OI539Oct 23, 2026
Last change-21vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BRK.B $485.00 put open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 5732860 2026-10-02: 394 OI2026-10-05: 403 OI2026-10-06: 481 OI2026-10-07: 489 OI2026-10-08: 489 OI2026-10-09: 489 OI2026-10-13: 538 OI2026-10-14: 538 OI2026-10-15: 550 OI2026-10-16: 573 OI2026-10-21: 560 OI2026-10-23: 539 OI Oct 02, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

BRK.B contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing539-21
Oct 21, 2026560-13
Oct 16, 2026573+23
Oct 15, 2026550+12
Oct 14, 20265380
Oct 13, 2026538+49
Oct 09, 20264890
Oct 08, 20264890
Oct 07, 2026489+8
Oct 06, 2026481+78
Oct 05, 2026403+9
Oct 02, 2026394No prior observation