28 February 2019

Proton Partners International Limited

Admission to the NEX Exchange Growth Market, First Day of Dealings

Proton Partners International Limited (NEX: PPI, the "Company" or the "Group"), the holding company of a group committed to providing innovative cancer care of the highest quality, is pleased to announce that Admission of the Company's Shares to trading on the NEX Exchange Growth Market will take place at 8.00 a.m. today, 28 February 2019 ("Admission"). Dealings will commence under the ticker "PPI" and the Company's ISIN is GB00BJCWB146 and its SEDOL is BJCWB14.

On Admission, the Company will have a market capitalisation of approximately GBP344 million. The Directors believe that the Admission will raise the profile of the Group among investors and give confidence to patients, suppliers and regulatory authorities.

Following Admission, the total number of Ordinary Shares in the Company in issue will be 152,701,897. Total Voting Rights immediately following Admission will be 150,357,744. The difference between the Issued Share Capital and Total Voting Rights is the result of the limit of 19.50 per cent. on voting rights held by shareholders in the Company LF Woodford Equity Income Fund and Omnis Income and Growth Fund, in accordance with the articles of association of the Company.

For the purposes of the Financial Conduct Authority's Disclosure Guidance and Transparency Rules ("DTRs"), this figure of 150,357,744 may be used by shareholders in the Company as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in the Company, under the DTRs.

The Company will provide updates whenever the total number of voting rights changes.

The Company's admission document, together with further details of the Company can be found on the Company's website: www.proton-int.com/investors

The directors of the Company accept responsibility for the content of this announcement.