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Contract OI history

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May 21, 2027 EXPIRATION

COLB $35.00 Call

COLB270521C00035000

Latest saved OI99Oct 23, 2026
Last change+15vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
COLB $35.00 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. 99490 2026-10-09: 70 OI2026-10-13: 74 OI2026-10-14: 74 OI2026-10-15: 75 OI2026-10-16: 75 OI2026-10-21: 84 OI2026-10-23: 99 OI Oct 09, 2026Oct 23, 2026

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

COLB contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing99+15
Oct 21, 202684+9
Oct 16, 2026750
Oct 15, 202675+1
Oct 14, 2026740
Oct 13, 202674+4
Oct 09, 202670No prior observation