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Contract OI history

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Dec 18, 2026 EXPIRATION

ISRG $370.00 Put

ISRG261218P00370000

Latest saved OI296Oct 23, 2026
Last change-12vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
ISRG $370.00 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. 3081540 2026-10-09: 285 OI2026-10-13: 284 OI2026-10-14: 284 OI2026-10-15: 284 OI2026-10-16: 284 OI2026-10-21: 308 OI2026-10-23: 296 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, 2026Viewing296-12
Oct 21, 2026308+24
Oct 16, 20262840
Oct 15, 20262840
Oct 14, 20262840
Oct 13, 2026284-1
Oct 09, 2026285No prior observation