v3.26.1
Income tax benefit/(expense) (Tables)
 12 Months Ended
Jun. 30, 2026
Major components of tax expense (income) [abstract]  
Summary of Reconciliation of Income Tax to Prima Facie Tax Payable
Year Ended June 30,
(in U.S. dollars, in thousands)202620252024
(a)Reconciliation of income tax to prima facie tax payable
Loss from continuing operations before income tax(56,887)(101,812)(88,147)
Tax benefit at the Australian tax rate of 30% (2025: 30%, 2024: 30%)
(17,066)(30,544)(26,444)
Tax effect of amounts which are not deductible/(exempt) in calculating taxable income:
Share-based payments expense1,413 5,911 1,752 
Bonus restructure expense180 1,973 — 
Non-Deductible Executive Compensation999 — — 
Research and development tax concessions(1,211)(1,236)324 
Foreign exchange translation (losses)/gains(789)(63)(103)
Contingent consideration(3,617)4,466 2,908 
Remeasurement of warrants(209)1,557 — 
Other sundry items1,106 447 (231)
Subtotal(19,194)(17,489)(21,794)
Adjustments for current tax of prior periods582 4,540 198 
Differences in overseas tax rates(1)
(6,600)14,330 6,051 
Tax benefit/(expense) not recognized25,825 (1,051)15,354 
Income tax expense/(benefit) attributable to loss before income tax613 330 (191)
(1)
In the year ended June 30, 2026, there was a change in the expected tax rate applicable on unused tax losses in the United States to include an apportioned state tax rate. The unused tax losses have been revalued accordingly.

In the year ended June 30, 2025, there was a change in the expected tax rate applicable on unused tax losses in Singapore for the years 2018-2020. For the tax years 2018-2020, the Singapore tax losses have been revalued from the statutory tax rate of 17% to the concessionary tax rate applicable under the Singapore tax incentives granted by the Singapore Economic Development Board.
Summary of income tax expense/(benefit)
Year Ended June 30,
(in U.S. dollars, in thousands)202620252024
(b)Income tax (benefit)/expense
Current tax
Current tax— — — 
Total current tax (benefit)/expense— — — 
Deferred tax
(Increase)/decrease in deferred tax assets(9,414)999 56 
Increase/(decrease) in deferred tax liabilities10,027 (669)(247)
Total deferred tax expense/(benefit)613 330 (191)
Income tax expense/(benefit)613 330 (191)
Summary of Amounts That Would Be Recognized Directly in Equity if Brought to Account
Year Ended June 30,
(in U.S. dollars, in thousands)202620252024
(c)Amounts that would be recognized directly in equity if brought to account
Aggregate current and deferred tax arising in the reporting period and not recognized in net loss or other comprehensive income but which would have been directly applied to equity had it been brought to account:
Current tax recorded in equity (if brought to account)(128)(1,514)(1,329)
Deferred tax recorded in equity (if brought to account)881 881 1,029 
753 (633)(300)
Summary of Amounts That Would Be Recognized Directly in Equity
Year Ended June 30,
(in U.S. dollars, in thousands)202620252024
(d)Amounts recognized directly in equity
Aggregate current and deferred tax arising in the reporting period and not recognized in net loss or other comprehensive income but debited/credited to equity
Current tax recorded in equity— — — 
Deferred tax recorded in equity(613)(330)191 
(613)(330)191 
Summary of Deferred Tax Assets Not Brought to Account
Year Ended June 30,
(in U.S. dollars, in thousands)202620252024
(e)Deferred tax assets not brought to account
Unused tax losses
Potential tax benefit at local tax rates153,678 138,740 140,129 
Other temporary differences
Potential tax benefit at local tax rates19,259 12,636 14,204 
Other tax credits
Potential tax benefit at local tax rates3,220 3,220 3,220 
176,157 154,596 157,553