The latest data point for ISRG's P/B Ratio in Q1'26 stands at 9.30, reflecting a slight decline from the previous quarter's value of 9.54 in Q4'25 and indicating a moderation in valuation multiples amid potential market adjustments. Over the period from Q2'23 to Q1'26, the P/B Ratio has exhibited an overall upward trend with notable volatility, starting at 9.57 and peaking at 12.41 in Q4'24 before retreating to current levels. Key inflection points include a dip to 7.49 in Q3'23, followed by consistent recovery and growth through Q3'25, suggesting strengthening investor confidence in ISRG's book value, though recent quarters show stabilization around the 9-11 range typical for the medical device sector.