OITracker Cboe delayed data

Contract OI history

Back to BRK.B

Jan 15, 2027 EXPIRATION

BRK.B $440.00 Put

BRKB270115P00440000

Latest saved OI1,655Oct 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 $440.00 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. 1,6698340 2026-10-02: 1,664 OI2026-10-05: 1,667 OI2026-10-06: 1,669 OI2026-10-07: 1,669 OI2026-10-08: 1,669 OI2026-10-09: 1,669 OI2026-10-13: 1,666 OI2026-10-14: 1,666 OI2026-10-15: 1,666 OI2026-10-16: 1,661 OI2026-10-21: 1,656 OI2026-10-23: 1,655 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, 2026Viewing1,655-1
Oct 21, 20261,656-5
Oct 16, 20261,661-5
Oct 15, 20261,6660
Oct 14, 20261,6660
Oct 13, 20261,666-3
Oct 09, 20261,6690
Oct 08, 20261,6690
Oct 07, 20261,6690
Oct 06, 20261,669+2
Oct 05, 20261,667+3
Oct 02, 20261,664No prior observation