OITracker Cboe delayed data

Contract OI history

Back to BRK.B

Nov 20, 2026 EXPIRATION

BRK.B $320.00 Put

BRKB261120P00320000

Latest saved OI345Oct 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 $320.00 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. 3451720 2026-10-02: 280 OI2026-10-05: 280 OI2026-10-06: 280 OI2026-10-07: 280 OI2026-10-08: 280 OI2026-10-09: 345 OI2026-10-13: 345 OI2026-10-14: 345 OI2026-10-15: 345 OI2026-10-16: 345 OI2026-10-21: 345 OI2026-10-23: 345 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, 2026Viewing3450
Oct 21, 20263450
Oct 16, 20263450
Oct 15, 20263450
Oct 14, 20263450
Oct 13, 20263450
Oct 09, 2026345+65
Oct 08, 20262800
Oct 07, 20262800
Oct 06, 20262800
Oct 05, 20262800
Oct 02, 2026280No prior observation