OITracker Cboe delayed data

Contract OI history

Back to BRK.B

Jan 21, 2028 EXPIRATION

BRK.B $550.00 Put

BRKB280121P00550000

Latest saved OI890Oct 23, 2026
Last change+1vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BRK.B $550.00 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. 8904450 2026-10-02: 881 OI2026-10-05: 881 OI2026-10-06: 880 OI2026-10-07: 880 OI2026-10-08: 880 OI2026-10-09: 879 OI2026-10-13: 889 OI2026-10-14: 889 OI2026-10-15: 889 OI2026-10-16: 889 OI2026-10-21: 889 OI2026-10-23: 890 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, 2026Viewing890+1
Oct 21, 20268890
Oct 16, 20268890
Oct 15, 20268890
Oct 14, 20268890
Oct 13, 2026889+10
Oct 09, 2026879-1
Oct 08, 20268800
Oct 07, 20268800
Oct 06, 2026880-1
Oct 05, 20268810
Oct 02, 2026881No prior observation