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Contract OI history

Back to BRK.B

Dec 18, 2026 EXPIRATION

BRK.B $540.00 Put

BRKB261218P00540000

Latest saved OI422Oct 23, 2026
Last change+28vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BRK.B $540.00 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. 4222110 2026-10-02: 350 OI2026-10-05: 351 OI2026-10-06: 351 OI2026-10-07: 351 OI2026-10-08: 351 OI2026-10-09: 351 OI2026-10-13: 351 OI2026-10-14: 351 OI2026-10-15: 350 OI2026-10-16: 366 OI2026-10-21: 394 OI2026-10-23: 422 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, 2026Viewing422+28
Oct 21, 2026394+28
Oct 16, 2026366+16
Oct 15, 2026350-1
Oct 14, 20263510
Oct 13, 20263510
Oct 09, 20263510
Oct 08, 20263510
Oct 07, 20263510
Oct 06, 20263510
Oct 05, 2026351+1
Oct 02, 2026350No prior observation