X0609 4 2026-07-22 0 0001804176 Butterfly Network, Inc. BFLY 0001076352 ROTHBERG JONATHAN M false C/O BUTTERFLY NETWORK, INC. 1600 DISTRICT AVENUE BURLINGTON MA 01803 1 0 0 0 1 Class B Common Stock 2026-07-22 4 S 0 54143 6.4698 D 0 I By GBR TR, LLC Class B Common Stock 2026-07-22 4 S 0 72724 6.4698 D 0 I By NVR TR, LLC Class B Common Stock 2026-07-22 4 S 0 496680 6.4698 D 0 I By EJR TR, LLC Class B Common Stock 2026-07-22 4 S 0 36366 6.4698 D 0 I By JNR TR, LLC Class A Common Stock 105881 D Class A Common Stock 726696 I By Bonnie E Gould Rothberg MD Class B Common Stock 4716596 I By 4C Holdings I, LLC Class B Common Stock 2621701 I By 4C Holdings II, LLC Class B Common Stock 2621701 I By 4C Holdings III, LLC Class B Common Stock 2621701 I By 4C Holdings IV, LLC Class B Common Stock 8845238 I By 4C Holdings V, LLC In accordance with its terms, the Class B common stock automatically converted into Class A common stock, on a one-to-one basis, upon sale. The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 13, 2026 for estate planning purposes. Represents the weighted average sales price per share. The shares sold at prices ranging from $6.355 to $6.78 per share. Full information regarding the number of shares sold at each price shall be provided upon request to the staff of the U.S. Securities and Exchange Commission, the Issuer, or a security holder of the Issuer. Dr. Rothberg is the Manager of 4C Holdings I, LLC, 4C Holdings II, LLC, 4C Holdings III, LLC, 4C Holdings IV, LLC, 4C Holdings V, LLC, NVR TR, LLC, JNR TR, LLC, GBR TR, LLC and EJR TR, LLC, and is the spouse of Bonnie E Gould Rothberg MD. Dr. Rothberg disclaims beneficial ownership of the securities held by these persons and entities except to the extent of his pecuniary interest therein. /s/ Jonathan M. Rothberg, Ph.D. 2026-07-24