OITracker Cboe delayed data

Contract OI history

Back to BRK.B

Dec 18, 2026 EXPIRATION

BRK.B $425.00 Put

BRKB261218P00425000

Latest saved OI1,260Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BRK.B $425.00 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. 1,2606300 2026-10-02: 1,165 OI2026-10-05: 1,171 OI2026-10-06: 1,177 OI2026-10-07: 1,177 OI2026-10-08: 1,177 OI2026-10-09: 1,177 OI2026-10-13: 1,177 OI2026-10-14: 1,177 OI2026-10-15: 1,177 OI2026-10-16: 1,243 OI2026-10-21: 1,260 OI2026-10-23: 1,260 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, 2026Viewing1,2600
Oct 21, 20261,260+17
Oct 16, 20261,243+66
Oct 15, 20261,1770
Oct 14, 20261,1770
Oct 13, 20261,1770
Oct 09, 20261,1770
Oct 08, 20261,1770
Oct 07, 20261,1770
Oct 06, 20261,177+6
Oct 05, 20261,171+6
Oct 02, 20261,165No prior observation