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Contract OI history

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Nov 20, 2026 EXPIRATION

ALGN $155.00 Call

ALGN261120C00155000

Latest saved OI542Oct 23, 2026
Last change+184vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
ALGN $155.00 call open interest history 7 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 5422710 2026-10-09: 50 OI2026-10-13: 52 OI2026-10-14: 358 OI2026-10-15: 358 OI2026-10-16: 358 OI2026-10-21: 358 OI2026-10-23: 542 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, 2026Viewing542+184
Oct 21, 20263580
Oct 16, 20263580
Oct 15, 20263580
Oct 14, 2026358+306
Oct 13, 202652+2
Oct 09, 202650No prior observation