X0508 4 2026-02-13 0 0001321732 Penumbra Inc PEN 0001796068 Shiu Lambert ONE PENUMBRA PLACE ALAMEDA CA 94502 0 1 0 0 Chief Accounting Officer 0 Common Stock 2026-02-13 4 A 0 2300 0 A 37585 D Common Stock 2026-02-15 4 F 0 412 339.30 D 37173 D Common Stock 2026-02-17 4 A 0 2300 0 A 39473 D Common Stock 300 I By Spouse's IRA On February 13, 2026, the Reporting Person was granted 2,300 restricted stock units (RSUs) under the Issuer's Amended and Restated 2014 Equity Incentive Plan, of which 1/4 of the RSUs will vest equally on February 15, 2026, February 15, 2027, February 15, 2028 and February 15, 2029, subject to continued service by the Reporting Person on the applicable vesting date. 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 continued service by the Reporting Person through such date. A portion of these shares is subject to vesting. Shares were withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting of RSUs granted to the Reporting Person. On February 17, 2026, the Reporting Person was granted 2,300 RSUs under the Issuer's Amended and Restated 2014 Equity Incentive Plan, of which 1/4 of the RSUs will vest equally on an annual basis, beginning on February 15, 2027, subject to continued service by the Reporting Person on the applicable vesting date. 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 continued service by the Reporting Person through such date. Shares are held by the Reporting Person's spouse in an IRA. /s/ Johanna Roberts, as attorney-in-fact for Lambert Shiu 2026-02-18