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Contract OI history

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Mar 19, 2027 EXPIRATION

WELL $220.00 Put

WELL270319P00220000

Latest saved OI803Oct 23, 2026
Last change+34vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
WELL $220.00 put open interest history 11 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 8034010 2026-10-02: 660 OI2026-10-05: 660 OI2026-10-06: 760 OI2026-10-07: 760 OI2026-10-08: 770 OI2026-10-09: 770 OI2026-10-14: 770 OI2026-10-15: 770 OI2026-10-16: 770 OI2026-10-21: 769 OI2026-10-23: 803 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, 2026Viewing803+34
Oct 21, 2026769-1
Oct 16, 20267700
Oct 15, 20267700
Oct 14, 20267700
Oct 09, 20267700
Oct 08, 2026770+10
Oct 07, 20267600
Oct 06, 2026760+100
Oct 05, 20266600
Oct 02, 2026660No prior observation