QUANTUM CORP /DE/

NOTE 9: INCOME TAXES

The effective tax rate for the three months ended June 30, 2026 and 2025 was -0.5%, and -1.1%, respectively. The effective tax rates differed from the federal statutory tax rate of 21% during each of these periods due primarily to unbenefited losses experienced in jurisdictions with valuation allowances on deferred tax assets as well as the forecasted mix of earnings in domestic and international jurisdictions.

As of June 30, 2026, including interest and penalties, the Company had $78.3 million of unrecognized tax benefits, $69.1 million of which, if recognized, would favorably affect the effective tax rate without consideration of the valuation allowance. As of June 30, 2026, the Company had accrued interest and penalties related to these unrecognized tax benefits of $1.2 million. The Company recognizes interest and penalties related to income tax matters in the income tax provision in the condensed consolidated statements of operations and comprehensive loss. As of June 30, 2026, $71.3 million of unrecognized tax benefits were recorded as a contra deferred tax asset in other long-term assets in the condensed consolidated balance sheets and $7.0 million (including interest and penalties) were recorded in other long-term liabilities in the condensed consolidated balance sheets. During the next 12 months, it is reasonably possible that approximately $1.8 million of tax benefits, inclusive of interest and penalties, that are currently unrecognized could be recognized as a result of the expiration of applicable statutes of limitations. Upon recognition of the tax benefit related to the expiring statutes of limitation, $0.8 million will be offset by the establishment of a related valuation allowance. The net tax benefit recognized in the statements of operations and comprehensive loss is estimated to be $1.0 million.