OITracker Cboe delayed data

Contract OI history

Back to BRK.B

Dec 18, 2026 EXPIRATION

BRK.B $370.00 Put

BRKB261218P00370000

Latest saved OI660Oct 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 $370.00 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. 6603300 2026-10-02: 649 OI2026-10-05: 648 OI2026-10-06: 655 OI2026-10-07: 655 OI2026-10-08: 655 OI2026-10-09: 653 OI2026-10-13: 653 OI2026-10-14: 653 OI2026-10-15: 652 OI2026-10-16: 652 OI2026-10-21: 660 OI2026-10-23: 660 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, 2026Viewing6600
Oct 21, 2026660+8
Oct 16, 20266520
Oct 15, 2026652-1
Oct 14, 20266530
Oct 13, 20266530
Oct 09, 2026653-2
Oct 08, 20266550
Oct 07, 20266550
Oct 06, 2026655+7
Oct 05, 2026648-1
Oct 02, 2026649No prior observation