X0609 4 2026-05-19 0 0001852131 Nextpower Inc. NXT 0001209945 LEDESMA BRUCE false C/O NEXTPOWER INC. 6200 PASEO PADRE PARKWAY FREMONT CA 94555 0 1 0 0 Chief Legal & Compliance Ofc 1 Common Stock 2026-05-19 4 M 0 122502 0 A 378810 D Common Stock 2026-05-20 4 J 0 1950 123.21 D 376860 D Common Stock 2026-05-20 4 J 0 27521 124.28 D 349339 D Common Stock 2026-05-20 4 J 0 60122 125.16 D 289217 D Common Stock 2026-05-20 4 J 0 23448 125.97 D 265769 D Common Stock 2026-05-20 4 J 0 8650 126.92 D 257119 D Common Stock 2026-05-20 4 J 0 811 127.86 D 256308 D Stock Option (Right to Buy) 21 2026-05-19 4 M 0 122502 0.00 D 2026-04-01 2027-03-15 Common Stock 122502 0 D Reflects an award of performance-based options ("Performance Options") to purchase shares of the Issuer's common stock ("Common Stock") that vested and became exercisable as of April 1, 2026 upon the achievement of both a continuous service requirement and the achievement of certain Nextpower equity valuation growth conditions. These Performance Options contain unique restrictions which (i) provide a limited period of time following vesting to exercise such Performance Options (i.e., by no later than March 15, 2027) or otherwise such Performance Options terminate and (ii) cap the maximum "gain" value realizable by Mr. Ledesma upon exercise of the total award of Performance Options at 250% of the aggregate exercise price (the "Max Benefit Limit"). The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person on September 10, 2024. A portion of this sale includes the sale of shares of Common Stock required to be sold in order to satisfy the exercise price and tax withholding obligations in connection with the exercise of the Performance Options. The price reported in Column 4 is a weighted average price. The reported securities were sold in multiple transactions at prices ranging from $122.58 to $123.57, inclusive. The Reporting Person undertakes to provide to the issuer, any security holder of the issuer or the staff of the Securities and Exchange Commission (SEC), upon request, full information regarding the number of shares sold at each separate price within such ranges. The price reported in Column 4 is a weighted average price. The reported securities were sold in multiple transactions at prices ranging from $123.59 to $124.58, inclusive. The Reporting Person undertakes to provide to the issuer, any security holder of the issuer or the staff of the Securities and Exchange Commission (SEC), upon request, full information regarding the number of shares sold at each separate price within such ranges. The price reported in Column 4 is a weighted average price. The reported securities were sold in multiple transactions at prices ranging from $124.59 to $125.585, inclusive. The Reporting Person undertakes to provide to the issuer, any security holder of the issuer or the staff of the Securities and Exchange Commission (SEC), upon request, full information regarding the number of shares sold at each separate price within such ranges. The price reported in Column 4 is a weighted average price. The reported securities were sold in multiple transactions at prices ranging from $125.59 to $126.58, inclusive. The Reporting Person undertakes to provide to the issuer, any security holder of the issuer or the staff of the Securities and Exchange Commission (SEC), upon request, full information regarding the number of shares sold at each separate price within such ranges. The price reported in Column 4 is a weighted average price. The reported securities were sold in multiple transactions at prices ranging from $126.60 to $127.59, inclusive. The Reporting Person undertakes to provide to the issuer, any security holder of the issuer or the staff of the Securities and Exchange Commission (SEC), upon request, full information regarding the number of shares sold at each separate price within such ranges. The price reported in Column 4 is a weighted average price. The reported securities were sold in multiple transactions at prices ranging from $127.63 to $128.09, inclusive. The Reporting Person undertakes to provide to the issuer, any security holder of the issuer or the staff of the Securities and Exchange Commission (SEC), upon request, full information regarding the number of shares sold at each separate price within such ranges. As a result of the application of the Max Benefit Limit, 125,117 Performance Options were forfeited and cancelled without any consideration. /s/ Philip Reuther, as attorney-in-fact for Bruce Ledesma 2026-05-21