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Contract OI history

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Nov 20, 2026 EXPIRATION

ATEC $12.50 Call

ATEC261120C00012500

Latest saved OI1,900Oct 20, 2026
Last change-896vs previous saved observation
Saved market days5Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
ATEC $12.50 call open interest history 5 saved observations from 2026-10-09 to 2026-10-20. Exact values and changes are listed in the table below. 3,1851,5920 2026-10-09: 3,185 OI2026-10-13: 3,000 OI2026-10-15: 2,797 OI2026-10-16: 2,796 OI2026-10-20: 1,900 OI Oct 09, 2026Oct 20, 2026

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

ATEC contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 20, 2026Viewing1,900-896
Oct 16, 20262,796-1
Oct 15, 20262,797-203
Oct 13, 20263,000-185
Oct 09, 20263,185No prior observation