OITracker Cboe delayed data

Contract OI history

Back to BRK.B

Dec 18, 2026 EXPIRATION

BRK.B $525.00 Put

BRKB261218P00525000

Latest saved OI295Oct 23, 2026
Last change+99vs 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. 2951470 2026-10-02: 128 OI2026-10-05: 128 OI2026-10-06: 134 OI2026-10-07: 134 OI2026-10-08: 134 OI2026-10-09: 134 OI2026-10-13: 156 OI2026-10-14: 156 OI2026-10-15: 146 OI2026-10-16: 147 OI2026-10-21: 196 OI2026-10-23: 295 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, 2026Viewing295+99
Oct 21, 2026196+49
Oct 16, 2026147+1
Oct 15, 2026146-10
Oct 14, 20261560
Oct 13, 2026156+22
Oct 09, 20261340
Oct 08, 20261340
Oct 07, 20261340
Oct 06, 2026134+6
Oct 05, 20261280
Oct 02, 2026128No prior observation