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Contract OI history

Back to BRK.B

Jan 21, 2028 EXPIRATION

BRK.B $540.00 Put

BRKB280121P00540000

Latest saved OI309Oct 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 $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. 4172080 2026-10-02: 401 OI2026-10-05: 396 OI2026-10-06: 375 OI2026-10-07: 375 OI2026-10-08: 375 OI2026-10-09: 417 OI2026-10-13: 294 OI2026-10-14: 294 OI2026-10-15: 250 OI2026-10-16: 250 OI2026-10-21: 308 OI2026-10-23: 309 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, 2026Viewing309+1
Oct 21, 2026308+58
Oct 16, 20262500
Oct 15, 2026250-44
Oct 14, 20262940
Oct 13, 2026294-123
Oct 09, 2026417+42
Oct 08, 20263750
Oct 07, 20263750
Oct 06, 2026375-21
Oct 05, 2026396-5
Oct 02, 2026401No prior observation