OITracker Cboe delayed data

Contract OI history

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Jan 21, 2028 EXPIRATION

GSK $40.00 Put

GSK280121P00040000

Latest saved OI1,437Oct 23, 2026
Last change0vs 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. 1,4457220 2026-10-02: 1,445 OI2026-10-05: 1,445 OI2026-10-06: 1,445 OI2026-10-07: 1,445 OI2026-10-09: 1,445 OI2026-10-13: 1,445 OI2026-10-14: 1,445 OI2026-10-15: 1,445 OI2026-10-16: 1,445 OI2026-10-21: 1,437 OI2026-10-23: 1,437 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, 2026Viewing1,4370
Oct 21, 20261,437-8
Oct 16, 20261,4450
Oct 15, 20261,4450
Oct 14, 20261,4450
Oct 13, 20261,4450
Oct 09, 20261,4450
Oct 07, 20261,4450
Oct 06, 20261,4450
Oct 05, 20261,4450
Oct 02, 20261,445No prior observation