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Contract OI history

Back to BRK.B

Dec 18, 2026 EXPIRATION

BRK.B $520.00 Put

BRKB261218P00520000

Latest saved OI684Oct 23, 2026
Last change+121vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BRK.B $520.00 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. 6843420 2026-10-02: 461 OI2026-10-05: 461 OI2026-10-06: 461 OI2026-10-07: 461 OI2026-10-08: 461 OI2026-10-09: 557 OI2026-10-13: 570 OI2026-10-14: 570 OI2026-10-15: 581 OI2026-10-16: 584 OI2026-10-21: 563 OI2026-10-23: 684 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, 2026Viewing684+121
Oct 21, 2026563-21
Oct 16, 2026584+3
Oct 15, 2026581+11
Oct 14, 20265700
Oct 13, 2026570+13
Oct 09, 2026557+96
Oct 08, 20264610
Oct 07, 20264610
Oct 06, 20264610
Oct 05, 20264610
Oct 02, 2026461No prior observation