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Contract OI history

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Oct 30, 2026 EXPIRATION

ALGN $172.50 Call

ALGN261030C00172500

Latest saved OI32Oct 23, 2026
Last change+31vs previous saved observation
Saved market days2Oct 21, 2026 onwards
Daily open interest Hover a point for its date and OI
ALGN $172.50 call open interest history 2 saved observations from 2026-10-21 to 2026-10-23. Exact values and changes are listed in the table below. 32160 2026-10-21: 1 OI2026-10-23: 32 OI Oct 21, 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, 2026Viewing32+31
Oct 21, 20261No prior observation