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Contract OI history

Back to BRK.B

Jun 17, 2027 EXPIRATION

BRK.B $420.00 Put

BRKB270617P00420000

Latest saved OI536Oct 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 $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. 5382690 2026-10-02: 525 OI2026-10-05: 528 OI2026-10-06: 528 OI2026-10-07: 527 OI2026-10-08: 527 OI2026-10-09: 538 OI2026-10-13: 537 OI2026-10-14: 537 OI2026-10-15: 537 OI2026-10-16: 538 OI2026-10-21: 537 OI2026-10-23: 536 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, 2026Viewing536-1
Oct 21, 2026537-1
Oct 16, 2026538+1
Oct 15, 20265370
Oct 14, 20265370
Oct 13, 2026537-1
Oct 09, 2026538+11
Oct 08, 20265270
Oct 07, 2026527-1
Oct 06, 20265280
Oct 05, 2026528+3
Oct 02, 2026525No prior observation