X0607 3 2026-06-30 0 0001699963 Neutron Holdings, Inc. LIME 0001552050 GUGINO ANN B false C/O NEUTRON HOLDINGS, INC. 444 TOWNSEND STREET, FL 1 SAN FRANCISCO CA 94107 true Chief Financial Officer Common Stock 165644 D Stock Option (Right to Buy) 10.0128 2029-12-25 Common Stock 74404 D Stock Option (Right to Buy) 10.0128 2033-12-14 Common Stock 223214 D Represents restricted stock units ("RSUs"), each of which represents a contingent right to receive one share of Common Stock of the Issuer. The RSUs vest in approximately equal quarterly installments over four years, subject to the Reporting Person's continuous service with the Issuer. The stock option will vest on the 10th day after the Common Stock trades publicly for at least 90 consecutive trading days at or above a price per share that would result in the Issuer's market capitalization being at or above $4,000,000,000, subject to the Reporting Person's continuous service with the Issuer. One-third of the stock option vested on December 11, 2024; the remaining stock option vests in 24 approximately equal monthly installments thereafter, subject to the Reporting Person's continuous service with the Issuer. Exhibit 24- Power of Attorney. /s/ Susie Giordano, Attorney-in-Fact 2026-06-30