Company: CNTB
Filing Date: 2025-06-10
Form Type: F-3
Source: 0001193125-25-138482
Chunk: 127

Company: Connect Biopharma Holdings Ltd
Filing Date: 2025-06-10
Form: F-3
Chunk 127
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 pledge) of the ADSs or Ordinary Shares, unless you make a “mark-to-market”election as discussed below. Distributions you receive in a 43

taxable year that are greater than 125% of the average annual distributions you received during the shorter of the three preceding taxable years or your holding period for the ADSs or Ordinary Shares will be treated as an excess distribution. Under these special tax rules:

| • |     | the excess distribution or gain will be allocated ratably over your holding period for the ADSs or Ordinary 
 Shares;                                                                                                     |

| • |     | the amount allocated to the current taxable year, and any taxable year in your holding period prior to the 
 first taxable year in which we were a PFIC, will be treated as ordinary income; and                        |

| • |     | the amount allocated to each other year will be subject to the highest tax rate in effect for individuals or                                                                               
 corporations, as applicable, for each such year, and the interest charge generally applicable to underpayments of tax will be imposed on the resulting tax attributable to each such year. |

In addition, non-corporateU.S. Holders will not be eligible for reduced rates of taxation on any dividends received from us (as described above under “—Taxation of Dividends and Other Distributions on the ADSs or Ordinary Shares”) if we are a PFIC in the taxable year in which such dividends are paid or in the preceding taxable year. The tax liability for amounts allocated to taxable years prior to the year of disposition or “excess distribution” cannot be offset by any net operating losses for such years, and gains (but not losses) realized on the sale or other disposition of the ADSs or Ordinary Shares cannot be treated as capital, even if you hold the ADSs or Ordinary Shares as capital assets. If we are treated as a PFIC with respect to you for any taxable year, to the extent any of our subsidiaries are also PFICs or we make direct or indirect equity investments in other entities that are PFICs, you may be deemed to own shares in such lower-tier PFICs that are directly or indirectly owned by us in that proportion which the value of the ADSs and Ordinary Shares you own bears to the value of all of the ADSs and Ordinary Shares, and you may be subject to the adverse tax consequences described in the preceding paragraphs with respect to the shares of such lower-tier PFICs that you would be deemed to own. You should consult your tax advisor