OITracker Cboe delayed data

Contract OI history

Back to BRK.B

Jan 21, 2028 EXPIRATION

BRK.B $400.00 Put

BRKB280121P00400000

Latest saved OI1,606Oct 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 $400.00 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. 1,6068030 2026-10-02: 1,606 OI2026-10-05: 1,606 OI2026-10-06: 1,606 OI2026-10-07: 1,606 OI2026-10-08: 1,606 OI2026-10-09: 1,606 OI2026-10-13: 1,606 OI2026-10-14: 1,606 OI2026-10-15: 1,606 OI2026-10-16: 1,606 OI2026-10-21: 1,606 OI2026-10-23: 1,606 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, 2026Viewing1,6060
Oct 21, 20261,6060
Oct 16, 20261,6060
Oct 15, 20261,6060
Oct 14, 20261,6060
Oct 13, 20261,6060
Oct 09, 20261,6060
Oct 08, 20261,6060
Oct 07, 20261,6060
Oct 06, 20261,6060
Oct 05, 20261,6060
Oct 02, 20261,606No prior observation