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Contract OI history

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Dec 18, 2026 EXPIRATION

WELL $220.00 Call

WELL261218C00220000

Latest saved OI528Oct 23, 2026
Last change-1vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
WELL $220.00 call open interest history 11 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 5342670 2026-10-02: 529 OI2026-10-05: 529 OI2026-10-06: 529 OI2026-10-07: 529 OI2026-10-08: 529 OI2026-10-09: 529 OI2026-10-14: 534 OI2026-10-15: 529 OI2026-10-16: 529 OI2026-10-21: 529 OI2026-10-23: 528 OI Oct 02, 2026Oct 23, 2026

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

WELL contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing528-1
Oct 21, 20265290
Oct 16, 20265290
Oct 15, 2026529-5
Oct 14, 2026534+5
Oct 09, 20265290
Oct 08, 20265290
Oct 07, 20265290
Oct 06, 20265290
Oct 05, 20265290
Oct 02, 2026529No prior observation