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Dec 18, 2026 EXPIRATION

ONTO $200.00 Put

ONTO261218P00200000

Latest saved OI479Oct 23, 2026
Last change+40vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
ONTO $200.00 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. 4792390 2026-10-02: 357 OI2026-10-05: 357 OI2026-10-06: 357 OI2026-10-07: 357 OI2026-10-08: 357 OI2026-10-09: 357 OI2026-10-13: 355 OI2026-10-14: 357 OI2026-10-15: 454 OI2026-10-16: 419 OI2026-10-21: 439 OI2026-10-23: 479 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, 2026Viewing479+40
Oct 21, 2026439+20
Oct 16, 2026419-35
Oct 15, 2026454+97
Oct 14, 2026357+2
Oct 13, 2026355-2
Oct 09, 20263570
Oct 08, 20263570
Oct 07, 20263570
Oct 06, 20263570
Oct 05, 20263570
Oct 02, 2026357No prior observation