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Contract OI history

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Nov 20, 2026 EXPIRATION

ASPN $5.00 Put

ASPN261120P00005000

Latest saved OI400Oct 20, 2026
Last change+11vs previous saved observation
Saved market days10Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
ASPN $5.00 put open interest history 10 saved observations from 2026-10-02 to 2026-10-20. Exact values and changes are listed in the table below. 4002000 2026-10-02: 364 OI2026-10-05: 364 OI2026-10-06: 371 OI2026-10-07: 371 OI2026-10-08: 371 OI2026-10-09: 371 OI2026-10-13: 376 OI2026-10-14: 379 OI2026-10-16: 389 OI2026-10-20: 400 OI Oct 02, 2026Oct 20, 2026

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

ASPN contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 20, 2026Viewing400+11
Oct 16, 2026389+10
Oct 14, 2026379+3
Oct 13, 2026376+5
Oct 09, 20263710
Oct 08, 20263710
Oct 07, 20263710
Oct 06, 2026371+7
Oct 05, 20263640
Oct 02, 2026364No prior observation