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Contract OI history

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Dec 18, 2026 EXPIRATION

ONTO $220.00 Put

ONTO261218P00220000

Latest saved OI98Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
ONTO $220.00 put open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 2061030 2026-10-02: 202 OI2026-10-05: 202 OI2026-10-06: 202 OI2026-10-07: 202 OI2026-10-08: 202 OI2026-10-09: 202 OI2026-10-13: 204 OI2026-10-14: 206 OI2026-10-15: 200 OI2026-10-16: 109 OI2026-10-21: 98 OI2026-10-23: 98 OI Oct 02, 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, 2026Viewing980
Oct 21, 202698-11
Oct 16, 2026109-91
Oct 15, 2026200-6
Oct 14, 2026206+2
Oct 13, 2026204+2
Oct 09, 20262020
Oct 08, 20262020
Oct 07, 20262020
Oct 06, 20262020
Oct 05, 20262020
Oct 02, 2026202No prior observation