OITracker Cboe delayed data

Contract OI history

Back to BRK.B

Jan 21, 2028 EXPIRATION

BRK.B $270.00 Put

BRKB280121P00270000

Latest saved OI117Oct 23, 2026
Last change-75vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BRK.B $270.00 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. 192960 2026-10-02: 190 OI2026-10-05: 190 OI2026-10-06: 190 OI2026-10-07: 190 OI2026-10-08: 190 OI2026-10-09: 190 OI2026-10-13: 190 OI2026-10-14: 190 OI2026-10-15: 190 OI2026-10-16: 190 OI2026-10-21: 192 OI2026-10-23: 117 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, 2026Viewing117-75
Oct 21, 2026192+2
Oct 16, 20261900
Oct 15, 20261900
Oct 14, 20261900
Oct 13, 20261900
Oct 09, 20261900
Oct 08, 20261900
Oct 07, 20261900
Oct 06, 20261900
Oct 05, 20261900
Oct 02, 2026190No prior observation