OITracker Cboe delayed data

Contract OI history

Back to BRK.B

Dec 15, 2028 EXPIRATION

BRK.B $400.00 Put

BRKB281215P00400000

Latest saved OI570Oct 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 $400.00 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. 5752870 2026-10-02: 575 OI2026-10-05: 575 OI2026-10-06: 575 OI2026-10-07: 575 OI2026-10-08: 575 OI2026-10-09: 575 OI2026-10-13: 573 OI2026-10-14: 573 OI2026-10-15: 571 OI2026-10-16: 571 OI2026-10-21: 570 OI2026-10-23: 570 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, 2026Viewing5700
Oct 21, 2026570-1
Oct 16, 20265710
Oct 15, 2026571-2
Oct 14, 20265730
Oct 13, 2026573-2
Oct 09, 20265750
Oct 08, 20265750
Oct 07, 20265750
Oct 06, 20265750
Oct 05, 20265750
Oct 02, 2026575No prior observation