QUANTUM CORP /DE/

NOTE 8: NET LOSS PER SHARE

The Company has performance share units, restricted stock units and options to purchase shares under its Employee Stock Purchase Plan, as amended and restated on July 25, 2023 (“ESPP”), granted under various stock incentive plans that, upon exercise and vesting, would increase shares outstanding. The Company has also issued a warrant to purchase shares of Common Stock.

The dilutive impact related to shares of Common Stock from incentive plans and the outstanding warrant is determined by applying the treasury stock method to the assumed vesting of outstanding performance share units and restricted stock units and the exercise of outstanding options and warrants. The dilutive impact related to shares of Common Stock from contingently issuable performance share units is determined by applying a two-step approach using both the contingently issuable share guidance and the treasury stock method. In periods of a net loss, all potentially dilutive weighted-average outstanding shares of Common Stock equivalents were excluded from the computation of diluted net income (loss) per share attributable to common stockholders for the periods presented because including them would have been anti-dilutive.

The following weighted-average outstanding shares of Common Stock equivalents were excluded from the computation of diluted net loss per share attributable to common stockholders for the periods presented because including them would have been anti-dilutive (in thousands):

The Company had outstanding market based restricted stock units as of September 30, 2025 that were eligible to vest into shares of the Common Stock subject to the achievement of certain stock price targets in addition to a time-based vesting period. These contingently issuable shares are excluded from the computation of diluted earnings per share if, based on current period results, the shares would not be issuable if the end of the reporting period were the end of the contingency period. There were 34,201 shares of contingently issuable market-based restricted stock units that were excluded from the table above as the market conditions were not satisfied as of September 30, 2025.