OITracker Cboe delayed data

Contract OI history

Back to BRK.B

Nov 20, 2026 EXPIRATION

BRK.B $340.00 Put

BRKB261120P00340000

Latest saved OI518Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BRK.B $340.00 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. 5532760 2026-10-02: 553 OI2026-10-05: 523 OI2026-10-06: 533 OI2026-10-07: 528 OI2026-10-08: 528 OI2026-10-09: 528 OI2026-10-13: 518 OI2026-10-14: 518 OI2026-10-15: 518 OI2026-10-16: 518 OI2026-10-21: 518 OI2026-10-23: 518 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, 2026Viewing5180
Oct 21, 20265180
Oct 16, 20265180
Oct 15, 20265180
Oct 14, 20265180
Oct 13, 2026518-10
Oct 09, 20265280
Oct 08, 20265280
Oct 07, 2026528-5
Oct 06, 2026533+10
Oct 05, 2026523-30
Oct 02, 2026553No prior observation