OITracker Cboe delayed data

Contract OI history

Back to BRK.B

Nov 20, 2026 EXPIRATION

BRK.B $520.00 Put

BRKB261120P00520000

Latest saved OI335Oct 23, 2026
Last change+13vs 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. 3351670 2026-10-02: 242 OI2026-10-05: 244 OI2026-10-06: 243 OI2026-10-07: 243 OI2026-10-08: 243 OI2026-10-09: 238 OI2026-10-13: 298 OI2026-10-14: 298 OI2026-10-15: 303 OI2026-10-16: 310 OI2026-10-21: 322 OI2026-10-23: 335 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, 2026Viewing335+13
Oct 21, 2026322+12
Oct 16, 2026310+7
Oct 15, 2026303+5
Oct 14, 20262980
Oct 13, 2026298+60
Oct 09, 2026238-5
Oct 08, 20262430
Oct 07, 20262430
Oct 06, 2026243-1
Oct 05, 2026244+2
Oct 02, 2026242No prior observation