OITracker Cboe delayed data

Contract OI history

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Jan 15, 2027 EXPIRATION

GSK $40.00 Put

GSK270115P00040000

Latest saved OI1,874Oct 23, 2026
Last change+5vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
GSK $40.00 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. 1,8799390 2026-10-02: 1,878 OI2026-10-05: 1,879 OI2026-10-06: 1,874 OI2026-10-07: 1,874 OI2026-10-09: 1,874 OI2026-10-13: 1,874 OI2026-10-14: 1,874 OI2026-10-15: 1,874 OI2026-10-16: 1,868 OI2026-10-21: 1,869 OI2026-10-23: 1,874 OI Oct 02, 2026Oct 23, 2026

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

GSK contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing1,874+5
Oct 21, 20261,869+1
Oct 16, 20261,868-6
Oct 15, 20261,8740
Oct 14, 20261,8740
Oct 13, 20261,8740
Oct 09, 20261,8740
Oct 07, 20261,8740
Oct 06, 20261,874-5
Oct 05, 20261,879+1
Oct 02, 20261,878No prior observation