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Contract OI history

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Nov 20, 2026 EXPIRATION

IONS $55.00 Call

IONS261120C00055000

Latest saved OI156Oct 19, 2026
Last change-21vs previous saved observation
Saved market days5Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
IONS $55.00 call open interest history 5 saved observations from 2026-10-09 to 2026-10-19. Exact values and changes are listed in the table below. 177880 2026-10-09: 144 OI2026-10-13: 173 OI2026-10-14: 175 OI2026-10-16: 177 OI2026-10-19: 156 OI Oct 09, 2026Oct 19, 2026

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

IONS contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 19, 2026Viewing156-21
Oct 16, 2026177+2
Oct 14, 2026175+2
Oct 13, 2026173+29
Oct 09, 2026144No prior observation