OITracker Cboe delayed data

Contract OI history

Back to BRK.B

Dec 18, 2026 EXPIRATION

BRK.B $440.00 Put

BRKB261218P00440000

Latest saved OI2,200Oct 23, 2026
Last change+52vs 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. 2,2001,1000 2026-10-02: 2,161 OI2026-10-05: 2,161 OI2026-10-06: 2,162 OI2026-10-07: 2,162 OI2026-10-08: 2,162 OI2026-10-09: 2,155 OI2026-10-13: 2,154 OI2026-10-14: 2,154 OI2026-10-15: 2,153 OI2026-10-16: 2,153 OI2026-10-21: 2,148 OI2026-10-23: 2,200 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, 2026Viewing2,200+52
Oct 21, 20262,148-5
Oct 16, 20262,1530
Oct 15, 20262,153-1
Oct 14, 20262,1540
Oct 13, 20262,154-1
Oct 09, 20262,155-7
Oct 08, 20262,1620
Oct 07, 20262,1620
Oct 06, 20262,162+1
Oct 05, 20262,1610
Oct 02, 20262,161No prior observation