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Contract OI history

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Nov 20, 2026 EXPIRATION

ISRG $355.00 Put

ISRG261120P00355000

Latest saved OI165Oct 23, 2026
Last change-5vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
ISRG $355.00 put open interest history 7 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 174870 2026-10-09: 174 OI2026-10-13: 174 OI2026-10-14: 174 OI2026-10-15: 174 OI2026-10-16: 174 OI2026-10-21: 170 OI2026-10-23: 165 OI Oct 09, 2026Oct 23, 2026

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

ISRG contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing165-5
Oct 21, 2026170-4
Oct 16, 20261740
Oct 15, 20261740
Oct 14, 20261740
Oct 13, 20261740
Oct 09, 2026174No prior observation