PEN +28.9%. 3M +7.9%, Becton Dickinson +1.4%, Stryker −21.3%, Boston Scientific −55.3%. Weekly closes, Oct 17, 2025 = 100, log scale.

End-of-day closes (Databento EOD), the last close of each week. The four peers are the largest US-listed companies by market value in PEN’s SEC industry (Surgical & Medical Instruments & Apparatus) with a year of closes. It shows what the closes did; a move here is not a cause, a forecast or a call.