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Contract OI history

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Jun 17, 2027 EXPIRATION

ONTO $180.00 Put

ONTO270617P00180000

Latest saved OI502Oct 23, 2026
Last change+1vs previous saved observation
Saved market days4Oct 15, 2026 onwards
Daily open interest Hover a point for its date and OI
ONTO $180.00 put open interest history 4 saved observations from 2026-10-15 to 2026-10-23. Exact values and changes are listed in the table below. 5022510 2026-10-15: 0 OI2026-10-16: 500 OI2026-10-21: 501 OI2026-10-23: 502 OI Oct 15, 2026Oct 23, 2026

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

ONTO contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing502+1
Oct 21, 2026501+1
Oct 16, 2026500+500
Oct 15, 20260No prior observation