Company: CNTB
Filing Date: 2025-06-10
Form Type: F-3
Source: 0001193125-25-138482
Chunk: 125

Company: Connect Biopharma Holdings Ltd
Filing Date: 2025-06-10
Form: F-3
Chunk 125
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. dollars, the amount realized by the U.S. Holder generally will be the U.S. dollar value of the payment received determined by reference to the spot rate of exchange on the date of the sale or other
taxable disposition. However, if the ADSs or Ordinary Shares, as applicable, are traded on an established securities market for U.S. federal income tax purposes, as our ADSs (but not our Ordinary Shares) currently are, a cash basis U.S. Holder (and
if it elects, an accrual method U.S. Holder) will determine the U.S. dollar value of the amount realized in a non-U.S. dollar currency with respect to the ADSs or Ordinary

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Shares, as applicable, by translating the amount received (or deemed received) at the spot rate of exchange on the settlement date of the sale or other taxable disposition. If an accrual method U.S. Holder makes the election described above, the election must be applied consistently from year to year and cannot be changed without the consent of the U.S. Internal Revenue Service. An accrual method U.S. Holder that does not make the election will recognize foreign currency exchange gain or loss to the extent attributable to the difference between the exchange rates on the date of the sale or other taxable disposition and the settlement date. U.S. Holders should consult their tax advisors regarding how to account for any payments made in a foreign currency with respect to the sale or other taxable disposition of ADSs or Ordinary Shares and the proper treatment of gain or loss in their particular circumstances, including the effects of any applicable income tax treaties. Passive Foreign Investment Company A non-UnitedStates corporation will be a PFIC for U.S. federal income tax purposes for any taxable year if, after applying certain look-through rules, either:

| • |     | at least 75% of its gross income for such taxable year is passive income (the income test), or |

| • |     | at least 50% of the total value of its assets (generally based on an average of the quarterly values of the                                                        
 assets during such year) is attributable to assets, including cash, that produce passive income or are held for the production of passive income (the asset test). |

For this purpose, we will be treated as owning our proportionate share of the assets and earning our proportionate share of the income of any other corporation in which we own, directly or indirectly, 25% or more (by value) of the stock. Based on the