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Contract OI history

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Jan 21, 2028 EXPIRATION

ASPN $2.50 Put

ASPN280121P00002500

Latest saved OI43Oct 20, 2026
Last change-29vs previous saved observation
Saved market days10Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
ASPN $2.50 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. 72360 2026-10-02: 72 OI2026-10-05: 72 OI2026-10-06: 72 OI2026-10-07: 72 OI2026-10-08: 72 OI2026-10-09: 72 OI2026-10-13: 72 OI2026-10-14: 72 OI2026-10-16: 72 OI2026-10-20: 43 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, 2026Viewing43-29
Oct 16, 2026720
Oct 14, 2026720
Oct 13, 2026720
Oct 09, 2026720
Oct 08, 2026720
Oct 07, 2026720
Oct 06, 2026720
Oct 05, 2026720
Oct 02, 202672No prior observation