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Contract OI history

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Jan 21, 2028 EXPIRATION

ARDX $4.00 Call

ARDX280121C00004000

Latest saved OI800Oct 20, 2026
Last change+150vs previous saved observation
Saved market days6Oct 08, 2026 onwards
Daily open interest Hover a point for its date and OI
ARDX $4.00 call open interest history 6 saved observations from 2026-10-08 to 2026-10-20. Exact values and changes are listed in the table below. 8004000 2026-10-08: 597 OI2026-10-09: 596 OI2026-10-13: 646 OI2026-10-14: 651 OI2026-10-16: 650 OI2026-10-20: 800 OI Oct 08, 2026Oct 20, 2026

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

ARDX contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 20, 2026Viewing800+150
Oct 16, 2026650-1
Oct 14, 2026651+5
Oct 13, 2026646+50
Oct 09, 2026596-1
Oct 08, 2026597No prior observation