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Contract OI history

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Jan 15, 2027 EXPIRATION

ALGN $155.00 Put

ALGN270115P00155000

Latest saved OI132Oct 23, 2026
Last change-1vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
ALGN $155.00 put open interest history 7 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 133660 2026-10-09: 120 OI2026-10-13: 132 OI2026-10-14: 133 OI2026-10-15: 133 OI2026-10-16: 133 OI2026-10-21: 133 OI2026-10-23: 132 OI Oct 09, 2026Oct 23, 2026

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

ALGN contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing132-1
Oct 21, 20261330
Oct 16, 20261330
Oct 15, 20261330
Oct 14, 2026133+1
Oct 13, 2026132+12
Oct 09, 2026120No prior observation