OITracker Cboe delayed data

Contract OI history

Back to BRK.B

Jan 21, 2028 EXPIRATION

BRK.B $520.00 Put

BRKB280121P00520000

Latest saved OI749Oct 23, 2026
Last change+26vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BRK.B $520.00 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. 7493740 2026-10-02: 715 OI2026-10-05: 715 OI2026-10-06: 715 OI2026-10-07: 715 OI2026-10-08: 715 OI2026-10-09: 718 OI2026-10-13: 719 OI2026-10-14: 719 OI2026-10-15: 718 OI2026-10-16: 723 OI2026-10-21: 723 OI2026-10-23: 749 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, 2026Viewing749+26
Oct 21, 20267230
Oct 16, 2026723+5
Oct 15, 2026718-1
Oct 14, 20267190
Oct 13, 2026719+1
Oct 09, 2026718+3
Oct 08, 20267150
Oct 07, 20267150
Oct 06, 20267150
Oct 05, 20267150
Oct 02, 2026715No prior observation