OITracker Cboe delayed data

Contract OI history

Back to BRK.B

Jan 21, 2028 EXPIRATION

BRK.B $500.00 Put

BRKB280121P00500000

Latest saved OI972Oct 23, 2026
Last change-18vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BRK.B $500.00 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. 1,0055020 2026-10-02: 997 OI2026-10-05: 1,005 OI2026-10-06: 1,004 OI2026-10-07: 1,004 OI2026-10-08: 1,004 OI2026-10-09: 1,001 OI2026-10-13: 1,000 OI2026-10-14: 1,000 OI2026-10-15: 1,001 OI2026-10-16: 1,005 OI2026-10-21: 990 OI2026-10-23: 972 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, 2026Viewing972-18
Oct 21, 2026990-15
Oct 16, 20261,005+4
Oct 15, 20261,001+1
Oct 14, 20261,0000
Oct 13, 20261,000-1
Oct 09, 20261,001-3
Oct 08, 20261,0040
Oct 07, 20261,0040
Oct 06, 20261,004-1
Oct 05, 20261,005+8
Oct 02, 2026997No prior observation