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Contract OI history

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Dec 18, 2026 EXPIRATION

ISRG $405.00 Put

ISRG261218P00405000

Latest saved OI145Oct 23, 2026
Last change+11vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
ISRG $405.00 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. 145720 2026-10-09: 127 OI2026-10-13: 127 OI2026-10-14: 127 OI2026-10-15: 127 OI2026-10-16: 129 OI2026-10-21: 134 OI2026-10-23: 145 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, 2026Viewing145+11
Oct 21, 2026134+5
Oct 16, 2026129+2
Oct 15, 20261270
Oct 14, 20261270
Oct 13, 20261270
Oct 09, 2026127No prior observation