OITracker Cboe delayed data

Contract OI history

Back to BRK.B

Dec 18, 2026 EXPIRATION

BRK.B $450.00 Put

BRKB261218P00450000

Latest saved OI2,741Oct 23, 2026
Last change+61vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BRK.B $450.00 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. 2,7411,3700 2026-10-02: 2,736 OI2026-10-05: 2,739 OI2026-10-06: 2,720 OI2026-10-07: 2,719 OI2026-10-08: 2,719 OI2026-10-09: 2,710 OI2026-10-13: 2,718 OI2026-10-14: 2,718 OI2026-10-15: 2,716 OI2026-10-16: 2,715 OI2026-10-21: 2,680 OI2026-10-23: 2,741 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, 2026Viewing2,741+61
Oct 21, 20262,680-35
Oct 16, 20262,715-1
Oct 15, 20262,716-2
Oct 14, 20262,7180
Oct 13, 20262,718+8
Oct 09, 20262,710-9
Oct 08, 20262,7190
Oct 07, 20262,719-1
Oct 06, 20262,720-19
Oct 05, 20262,739+3
Oct 02, 20262,736No prior observation