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Contract OI history

Back to BRK.B

Nov 20, 2026 EXPIRATION

BRK.B $505.00 Put

BRKB261120P00505000

Latest saved OI409Oct 23, 2026
Last change-19vs 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. 4282140 2026-10-02: 283 OI2026-10-05: 308 OI2026-10-06: 373 OI2026-10-07: 390 OI2026-10-08: 390 OI2026-10-09: 377 OI2026-10-13: 388 OI2026-10-14: 388 OI2026-10-15: 389 OI2026-10-16: 403 OI2026-10-21: 428 OI2026-10-23: 409 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, 2026Viewing409-19
Oct 21, 2026428+25
Oct 16, 2026403+14
Oct 15, 2026389+1
Oct 14, 20263880
Oct 13, 2026388+11
Oct 09, 2026377-13
Oct 08, 20263900
Oct 07, 2026390+17
Oct 06, 2026373+65
Oct 05, 2026308+25
Oct 02, 2026283No prior observation