OITracker Cboe delayed data

Contract OI history

Back to BRK.B

Dec 18, 2026 EXPIRATION

BRK.B $350.00 Put

BRKB261218P00350000

Latest saved OI335Oct 23, 2026
Last change-10vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BRK.B $350.00 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. 3491740 2026-10-02: 341 OI2026-10-05: 341 OI2026-10-06: 342 OI2026-10-07: 342 OI2026-10-08: 342 OI2026-10-09: 349 OI2026-10-13: 347 OI2026-10-14: 347 OI2026-10-15: 347 OI2026-10-16: 345 OI2026-10-21: 345 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, 2026Viewing335-10
Oct 21, 20263450
Oct 16, 2026345-2
Oct 15, 20263470
Oct 14, 20263470
Oct 13, 2026347-2
Oct 09, 2026349+7
Oct 08, 20263420
Oct 07, 20263420
Oct 06, 2026342+1
Oct 05, 20263410
Oct 02, 2026341No prior observation