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Contract OI history

Back to BRK.B

Jan 15, 2027 EXPIRATION

BRK.B $420.00 Put

BRKB270115P00420000

Latest saved OI2,256Oct 23, 2026
Last change-6vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BRK.B $420.00 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. 2,3081,1540 2026-10-02: 2,263 OI2026-10-05: 2,298 OI2026-10-06: 2,304 OI2026-10-07: 2,308 OI2026-10-08: 2,308 OI2026-10-09: 2,308 OI2026-10-13: 2,262 OI2026-10-14: 2,262 OI2026-10-15: 2,262 OI2026-10-16: 2,262 OI2026-10-21: 2,262 OI2026-10-23: 2,256 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, 2026Viewing2,256-6
Oct 21, 20262,2620
Oct 16, 20262,2620
Oct 15, 20262,2620
Oct 14, 20262,2620
Oct 13, 20262,262-46
Oct 09, 20262,3080
Oct 08, 20262,3080
Oct 07, 20262,308+4
Oct 06, 20262,304+6
Oct 05, 20262,298+35
Oct 02, 20262,263No prior observation