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Contract OI history

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Nov 20, 2026 EXPIRATION

ALGM $22.50 Put

ALGM261120P00022500

Latest saved OI216Oct 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
ALGM $22.50 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. 2171080 2026-10-09: 216 OI2026-10-13: 216 OI2026-10-14: 216 OI2026-10-15: 217 OI2026-10-16: 217 OI2026-10-21: 215 OI2026-10-23: 216 OI Oct 09, 2026Oct 23, 2026

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

ALGM contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing216+1
Oct 21, 2026215-2
Oct 16, 20262170
Oct 15, 2026217+1
Oct 14, 20262160
Oct 13, 20262160
Oct 09, 2026216No prior observation