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Contract OI history

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Dec 18, 2026 EXPIRATION

ALGN $160.00 Put

ALGN261218P00160000

Latest saved OI168Oct 23, 2026
Last change0vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
ALGN $160.00 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. 173860 2026-10-09: 173 OI2026-10-13: 173 OI2026-10-14: 173 OI2026-10-15: 173 OI2026-10-16: 168 OI2026-10-21: 168 OI2026-10-23: 168 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, 2026Viewing1680
Oct 21, 20261680
Oct 16, 2026168-5
Oct 15, 20261730
Oct 14, 20261730
Oct 13, 20261730
Oct 09, 2026173No prior observation