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Contract OI history

Back to BRK.B

Dec 18, 2026 EXPIRATION

BRK.B $400.00 Put

BRKB261218P00400000

Latest saved OI532Oct 23, 2026
Last change-17vs 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. 5632810 2026-10-02: 541 OI2026-10-05: 563 OI2026-10-06: 558 OI2026-10-07: 558 OI2026-10-08: 558 OI2026-10-09: 554 OI2026-10-13: 550 OI2026-10-14: 550 OI2026-10-15: 550 OI2026-10-16: 549 OI2026-10-21: 549 OI2026-10-23: 532 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, 2026Viewing532-17
Oct 21, 20265490
Oct 16, 2026549-1
Oct 15, 20265500
Oct 14, 20265500
Oct 13, 2026550-4
Oct 09, 2026554-4
Oct 08, 20265580
Oct 07, 20265580
Oct 06, 2026558-5
Oct 05, 2026563+22
Oct 02, 2026541No prior observation