OITracker Cboe delayed data

Contract OI history

Back to BRK.B

Oct 30, 2026 EXPIRATION

BRK.B $520.00 Put

BRKB261030P00520000

Latest saved OI501Oct 23, 2026
Last change+217vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BRK.B $520.00 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. 5012500 2026-10-02: 11 OI2026-10-05: 11 OI2026-10-06: 12 OI2026-10-07: 12 OI2026-10-08: 12 OI2026-10-09: 12 OI2026-10-13: 63 OI2026-10-14: 63 OI2026-10-15: 66 OI2026-10-16: 100 OI2026-10-21: 284 OI2026-10-23: 501 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, 2026Viewing501+217
Oct 21, 2026284+184
Oct 16, 2026100+34
Oct 15, 202666+3
Oct 14, 2026630
Oct 13, 202663+51
Oct 09, 2026120
Oct 08, 2026120
Oct 07, 2026120
Oct 06, 202612+1
Oct 05, 2026110
Oct 02, 202611No prior observation