X0508 4 2026-02-13 0 0001321732 Penumbra Inc PEN 0001651318 Bose Arani ONE PENUMBRA PLACE ALAMEDA CA 94502 1 0 0 0 0 Common Stock 2026-02-13 4 A 0 589 0 A 1147 D Common Stock 258462 I By LLC Restricted stock units (RSUs) vest as to 1/4 on each of March 31, 2026, June 30, 2026, September 30, 2026, and December 31, 2026, subject to Dr. Bose's continued service as director through such dates. Notwithstanding the foregoing, if the Closing (as defined in that certain Agreement and Plan of Merger, dated as of January 14, 2026, among the Issuer, Boston Scientific Corporation, a Delaware corporation, and Pinehurst Merger Sub, Inc., a Delaware corporation) occurs, any of the RSUs that remain unvested will fully vest on the Closing, subject to Dr. Bose's continued service as director through such date. A portion of these shares is subject to vesting. Shares are held by Bose Family Holdings II, LLC. /s/ Johanna Roberts, as attorney-in-fact for Arani Bose 2026-02-18