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Contract OI history

Back to BRK.B

Jan 21, 2028 EXPIRATION

BRK.B $470.00 Put

BRKB280121P00470000

Latest saved OI878Oct 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 $470.00 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. 8794390 2026-10-02: 505 OI2026-10-05: 505 OI2026-10-06: 505 OI2026-10-07: 505 OI2026-10-08: 505 OI2026-10-09: 505 OI2026-10-13: 499 OI2026-10-14: 499 OI2026-10-15: 628 OI2026-10-16: 628 OI2026-10-21: 879 OI2026-10-23: 878 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, 2026Viewing878-1
Oct 21, 2026879+251
Oct 16, 20266280
Oct 15, 2026628+129
Oct 14, 20264990
Oct 13, 2026499-6
Oct 09, 20265050
Oct 08, 20265050
Oct 07, 20265050
Oct 06, 20265050
Oct 05, 20265050
Oct 02, 2026505No prior observation