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Contract OI history

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Dec 18, 2026 EXPIRATION

ALDX $1.50 Call

ALDX261218C00001500

Latest saved OI143Oct 21, 2026
Last change+38vs previous saved observation
Saved market days5Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
ALDX $1.50 call open interest history 5 saved observations from 2026-10-09 to 2026-10-21. Exact values and changes are listed in the table below. 143710 2026-10-09: 96 OI2026-10-13: 96 OI2026-10-14: 98 OI2026-10-16: 105 OI2026-10-21: 143 OI Oct 09, 2026Oct 21, 2026

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

ALDX contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 21, 2026Viewing143+38
Oct 16, 2026105+7
Oct 14, 202698+2
Oct 13, 2026960
Oct 09, 202696No prior observation