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Contract OI history

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Dec 18, 2026 EXPIRATION

ISRG $350.00 Put

ISRG261218P00350000

Latest saved OI1,217Oct 23, 2026
Last change+45vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
ISRG $350.00 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. 1,3596790 2026-10-09: 1,359 OI2026-10-13: 1,355 OI2026-10-14: 1,355 OI2026-10-15: 1,355 OI2026-10-16: 1,178 OI2026-10-21: 1,172 OI2026-10-23: 1,217 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, 2026Viewing1,217+45
Oct 21, 20261,172-6
Oct 16, 20261,178-177
Oct 15, 20261,3550
Oct 14, 20261,3550
Oct 13, 20261,355-4
Oct 09, 20261,359No prior observation