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Contract OI history

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Dec 18, 2026 EXPIRATION

ISRG $430.00 Put

ISRG261218P00430000

Latest saved OI251Oct 23, 2026
Last change-4vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
ISRG $430.00 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. 2551270 2026-10-09: 159 OI2026-10-13: 158 OI2026-10-14: 158 OI2026-10-15: 158 OI2026-10-16: 158 OI2026-10-21: 255 OI2026-10-23: 251 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, 2026Viewing251-4
Oct 21, 2026255+97
Oct 16, 20261580
Oct 15, 20261580
Oct 14, 20261580
Oct 13, 2026158-1
Oct 09, 2026159No prior observation