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Contract OI history

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Nov 20, 2026 EXPIRATION

ALGM $42.50 Put

ALGM261120P00042500

Latest saved OI284Oct 23, 2026
Last change0vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
ALGM $42.50 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. 2851420 2026-10-09: 284 OI2026-10-13: 285 OI2026-10-14: 285 OI2026-10-15: 285 OI2026-10-16: 284 OI2026-10-21: 284 OI2026-10-23: 284 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, 2026Viewing2840
Oct 21, 20262840
Oct 16, 2026284-1
Oct 15, 20262850
Oct 14, 20262850
Oct 13, 2026285+1
Oct 09, 2026284No prior observation