OITracker Cboe delayed data

Contract OI history

Back to BRK.B

Jan 21, 2028 EXPIRATION

BRK.B $340.00 Call

BRKB280121C00340000

Latest saved OI3,304Oct 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 $340.00 call open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 3,3151,6570 2026-10-02: 3,302 OI2026-10-05: 3,315 OI2026-10-06: 3,315 OI2026-10-07: 3,315 OI2026-10-08: 3,315 OI2026-10-09: 3,314 OI2026-10-13: 3,306 OI2026-10-14: 3,306 OI2026-10-15: 3,306 OI2026-10-16: 3,306 OI2026-10-21: 3,305 OI2026-10-23: 3,304 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, 2026Viewing3,304-1
Oct 21, 20263,305-1
Oct 16, 20263,3060
Oct 15, 20263,3060
Oct 14, 20263,3060
Oct 13, 20263,306-8
Oct 09, 20263,314-1
Oct 08, 20263,3150
Oct 07, 20263,3150
Oct 06, 20263,3150
Oct 05, 20263,315+13
Oct 02, 20263,302No prior observation