OITracker Cboe delayed data

Contract OI history

Back to BRK.B

Jan 15, 2027 EXPIRATION

BRK.B $340.00 Put

BRKB270115P00340000

Latest saved OI422Oct 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. 4242120 2026-10-02: 423 OI2026-10-05: 423 OI2026-10-06: 424 OI2026-10-07: 424 OI2026-10-08: 424 OI2026-10-09: 424 OI2026-10-13: 424 OI2026-10-14: 424 OI2026-10-15: 424 OI2026-10-16: 424 OI2026-10-21: 422 OI2026-10-23: 422 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, 2026Viewing4220
Oct 21, 2026422-2
Oct 16, 20264240
Oct 15, 20264240
Oct 14, 20264240
Oct 13, 20264240
Oct 09, 20264240
Oct 08, 20264240
Oct 07, 20264240
Oct 06, 2026424+1
Oct 05, 20264230
Oct 02, 2026423No prior observation