OITracker Cboe delayed data

Contract OI history

Back to BRK.B

Nov 20, 2026 EXPIRATION

BRK.B $525.00 Put

BRKB261120P00525000

Latest saved OI198Oct 23, 2026
Last change+1vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BRK.B $525.00 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. 198990 2026-10-02: 74 OI2026-10-05: 79 OI2026-10-06: 79 OI2026-10-07: 79 OI2026-10-08: 79 OI2026-10-09: 76 OI2026-10-13: 66 OI2026-10-14: 66 OI2026-10-15: 111 OI2026-10-16: 95 OI2026-10-21: 197 OI2026-10-23: 198 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, 2026Viewing198+1
Oct 21, 2026197+102
Oct 16, 202695-16
Oct 15, 2026111+45
Oct 14, 2026660
Oct 13, 202666-10
Oct 09, 202676-3
Oct 08, 2026790
Oct 07, 2026790
Oct 06, 2026790
Oct 05, 202679+5
Oct 02, 202674No prior observation