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Contract OI history

Back to BRK.B

Jun 17, 2027 EXPIRATION

BRK.B $440.00 Put

BRKB270617P00440000

Latest saved OI736Oct 23, 2026
Last change-5vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BRK.B $440.00 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. 7413700 2026-10-02: 674 OI2026-10-05: 678 OI2026-10-06: 679 OI2026-10-07: 679 OI2026-10-08: 679 OI2026-10-09: 679 OI2026-10-13: 681 OI2026-10-14: 681 OI2026-10-15: 737 OI2026-10-16: 739 OI2026-10-21: 741 OI2026-10-23: 736 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, 2026Viewing736-5
Oct 21, 2026741+2
Oct 16, 2026739+2
Oct 15, 2026737+56
Oct 14, 20266810
Oct 13, 2026681+2
Oct 09, 20266790
Oct 08, 20266790
Oct 07, 20266790
Oct 06, 2026679+1
Oct 05, 2026678+4
Oct 02, 2026674No prior observation