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Contract OI history

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Jan 15, 2027 EXPIRATION

IONS $35.00 Put

IONS270115P00035000

Latest saved OI367Oct 19, 2026
Last change+15vs previous saved observation
Saved market days5Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
IONS $35.00 put open interest history 5 saved observations from 2026-10-09 to 2026-10-19. Exact values and changes are listed in the table below. 3671830 2026-10-09: 321 OI2026-10-13: 321 OI2026-10-14: 321 OI2026-10-16: 352 OI2026-10-19: 367 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, 2026Viewing367+15
Oct 16, 2026352+31
Oct 14, 20263210
Oct 13, 20263210
Oct 09, 2026321No prior observation