OITracker Cboe delayed data

Contract OI history

Back to BRK.B

Jan 21, 2028 EXPIRATION

BRK.B $450.00 Put

BRKB280121P00450000

Latest saved OI559Oct 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 $450.00 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. 5592790 2026-10-02: 524 OI2026-10-05: 524 OI2026-10-06: 524 OI2026-10-07: 526 OI2026-10-08: 526 OI2026-10-09: 526 OI2026-10-13: 550 OI2026-10-14: 550 OI2026-10-15: 549 OI2026-10-16: 553 OI2026-10-21: 559 OI2026-10-23: 559 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, 2026Viewing5590
Oct 21, 2026559+6
Oct 16, 2026553+4
Oct 15, 2026549-1
Oct 14, 20265500
Oct 13, 2026550+24
Oct 09, 20265260
Oct 08, 20265260
Oct 07, 2026526+2
Oct 06, 20265240
Oct 05, 20265240
Oct 02, 2026524No prior observation