X0609 4 2026-09-01 0 0002084026 QumulusAI, Inc. QMLS 0002098854 Gertz Stephen Ralph false C/O FOX ROTHSCHILD LLP 33 S. SIXTH STREET, SUITE 3600 MINNEAPOLIS MN 55402 0 1 0 0 Chief Growth Officer 0 Common Stock 2026-09-01 4 A 0 46848 0 A 98558 D Common Stock 2026-09-01 4 A 0 58329 0 A 156887 D Common Stock 2026-09-01 4 A 0 90112 0 A 246999 D Common Stock 2026-09-01 4 A 0 19165 0 A 266164 D Common Stock 83336 I By JGS Partners LLC These shares vest with respect to 11,712 shares on March 1, 2027 and with respect to 6.25% of the remaining shares quarterly over 12 quarters commencing June 1, 2027 pursuant to a restricted stock unit award granted under the QumulusAI, Inc. 2026 Equity Incentive Plan, conditioned upon the Reporting Person remaining an employee of QumulusAI, Inc. through the applicable vesting date. These shares vest on March 1, 2027 pursuant to a restricted stock unit award granted under the QumulusAI, Inc. 2026 Equity Incentive Plan. These shares vest with respect to 22,528 shares on September 1, 2027 and with respect to 6.25% of the remaining shares quarterly over 12 quarters commencing December 1, 2027 pursuant to a restricted stock unit award granted under the QumulusAI, Inc. 2026 Equity Incentive Plan, conditioned upon the Reporting Person remaining an employee of QumulusAI, Inc. through the applicable vesting date. These shares vest on October 1, 2026 pursuant to a restricted stock unit award granted under the QumulusAI, Inc. 2026 Equity Incentive Plan. Includes 214,454 shares to be issued upon vesting pursuant to restricted stock unit awards granted under the QumulusAI, Inc. 2026 Equity Incentive Plan, conditioned upon the Reporting Person remaining an employee of QumulusAI through the applicable vesting dates. /s/ Stephen Ralph Gertz 2026-09-02