OITracker Cboe delayed data

Contract OI history

Back to BRK.B

Nov 20, 2026 EXPIRATION

BRK.B $450.00 Put

BRKB261120P00450000

Latest saved OI422Oct 23, 2026
Last change+2vs 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. 4252120 2026-10-02: 409 OI2026-10-05: 413 OI2026-10-06: 424 OI2026-10-07: 425 OI2026-10-08: 425 OI2026-10-09: 415 OI2026-10-13: 417 OI2026-10-14: 417 OI2026-10-15: 414 OI2026-10-16: 415 OI2026-10-21: 420 OI2026-10-23: 422 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, 2026Viewing422+2
Oct 21, 2026420+5
Oct 16, 2026415+1
Oct 15, 2026414-3
Oct 14, 20264170
Oct 13, 2026417+2
Oct 09, 2026415-10
Oct 08, 20264250
Oct 07, 2026425+1
Oct 06, 2026424+11
Oct 05, 2026413+4
Oct 02, 2026409No prior observation