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Contract OI history

Back to BRK.B

Dec 18, 2026 EXPIRATION

BRK.B $505.00 Put

BRKB261218P00505000

Latest saved OI819Oct 23, 2026
Last change+45vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BRK.B $505.00 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. 8194090 2026-10-02: 542 OI2026-10-05: 545 OI2026-10-06: 566 OI2026-10-07: 577 OI2026-10-08: 577 OI2026-10-09: 591 OI2026-10-13: 613 OI2026-10-14: 613 OI2026-10-15: 684 OI2026-10-16: 757 OI2026-10-21: 774 OI2026-10-23: 819 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, 2026Viewing819+45
Oct 21, 2026774+17
Oct 16, 2026757+73
Oct 15, 2026684+71
Oct 14, 20266130
Oct 13, 2026613+22
Oct 09, 2026591+14
Oct 08, 20265770
Oct 07, 2026577+11
Oct 06, 2026566+21
Oct 05, 2026545+3
Oct 02, 2026542No prior observation