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Contract OI history

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Oct 23, 2026 EXPIRATION

BIIB $225.00 Call

BIIB261023C00225000

Latest saved OI204Oct 23, 2026
Last change-5vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
BIIB $225.00 call open interest history 7 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 2151070 2026-10-09: 201 OI2026-10-13: 215 OI2026-10-14: 214 OI2026-10-15: 210 OI2026-10-16: 210 OI2026-10-21: 209 OI2026-10-23: 204 OI Oct 09, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

BIIB contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing204-5
Oct 21, 2026209-1
Oct 16, 20262100
Oct 15, 2026210-4
Oct 14, 2026214-1
Oct 13, 2026215+14
Oct 09, 2026201No prior observation