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Contract OI history

Back to BRK.B

Nov 20, 2026 EXPIRATION

BRK.B $400.00 Put

BRKB261120P00400000

Latest saved OI165Oct 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 $400.00 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. 166830 2026-10-02: 90 OI2026-10-05: 90 OI2026-10-06: 91 OI2026-10-07: 91 OI2026-10-08: 91 OI2026-10-09: 91 OI2026-10-13: 166 OI2026-10-14: 166 OI2026-10-15: 166 OI2026-10-16: 166 OI2026-10-21: 166 OI2026-10-23: 165 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, 2026Viewing165-1
Oct 21, 20261660
Oct 16, 20261660
Oct 15, 20261660
Oct 14, 20261660
Oct 13, 2026166+75
Oct 09, 2026910
Oct 08, 2026910
Oct 07, 2026910
Oct 06, 202691+1
Oct 05, 2026900
Oct 02, 202690No prior observation