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Contract OI history

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Dec 18, 2026 EXPIRATION

MRK $185.00 Call

MRK261218C00185000

Latest saved OI125Oct 23, 2026
Last change+5vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
MRK $185.00 call open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 125620 2026-10-02: 113 OI2026-10-05: 112 OI2026-10-06: 112 OI2026-10-07: 112 OI2026-10-08: 112 OI2026-10-09: 112 OI2026-10-13: 113 OI2026-10-14: 113 OI2026-10-15: 113 OI2026-10-16: 113 OI2026-10-21: 120 OI2026-10-23: 125 OI Oct 02, 2026Oct 23, 2026

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

MRK contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing125+5
Oct 21, 2026120+7
Oct 16, 20261130
Oct 15, 20261130
Oct 14, 20261130
Oct 13, 2026113+1
Oct 09, 20261120
Oct 08, 20261120
Oct 07, 20261120
Oct 06, 20261120
Oct 05, 2026112-1
Oct 02, 2026113No prior observation