NX Filtration N.V.

Share Issue/Capital Change • Jun 21, 2021

NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION IN WHOLE OR IN PART, DIRECTLY OR INDIRECTLY, IN OR INTO THE UNITED STATES, CANADA, AUSTRALIA, JAPAN OR SOUTH AFRICA OR ANY OTHER JURISDICTION IN VIOLATION OF THE RELEVANT LAWS OF SUCH JURISDICTION.

Underwriters exercise over-allotment option and end of stabilisation period

Enschede, the Netherlands, 18 June 2021 – NX Filtration N.V. ("NX Filtration" or the "Company"), the global provider of breakthrough direct nanofiltration technology for pure and affordable water, today announces that ABN AMRO Bank N.V., in cooperation with ODDO BHF SCA ("ABN AMRO") and Joh. Berenberg, Gossler & Co KG ("Berenberg") (together the "Joint Global Coordinators" and the "Underwriters") have partially exercised the over-allotment option, selling an additional 465,642 Shares (as defined below) of NX Filtration at a price of EUR 11.00 per Share.

Over-allotment option

As part of the initial public offering of NX Filtration on Euronext Amsterdam (the "IPO" or the "Offering") and as set forth in the prospectus dated 8 June 2021 (the "Prospectus"), the Company's shareholder Infestos Holding E B.V. ("Infestos"), has granted ABN AMRO, as stabilisation agent (the "Stabilisation Agent"), on behalf of the Underwriters, the option to sell up to 2,250,000 of NX Filtration's existing ordinary shares (the "Shares") at a price of EUR 11.00 per Share. This over-allotment option has partly been exercised for 465,642 Shares.

Stabilisation

Stabilisation transactions have been carried out between 11 June 2021 and 16 June 2021 at a EUR 11.00 price level. No further stabilisation transactions have been carried out after 16 June 2021. The stabilisation period commenced on 11 June 2021 and ended on 18 June 2021. No further stabilisation transactions will be carried out. Further details of the stabilisation activity carried out by the Stabilisation Agent are set out in the table below..

Date	Buy/Sell	Volume	Lowest price	Highest price	Currency	Stabilisation Trading Venue
11 June	Buy	1,158,447	11.00	11.00	Euro	Amsterdam
14 June	Buy	317,677	11.00	11.00	Euro	Amsterdam
15 June	Buy	300,661	11.00	11.00	Euro	Amsterdam
16 June	Buy	7,573	11.00	11.00	Euro	Amsterdam

As a result of the Offering and the stabilisation trades carried out, the total number of shares sold in the Offering is 15,465,642 representing approximately 30.93% of the total number of 50,000,000 issued and outstanding ordinary shares in the capital of NX Filtration. Infestos now holds approximately 60% of the total number of outstanding shares in the capital of NX Filtration.

Underwriters

ABN AMRO and Berenberg acted as joint global coordinators and joint bookrunners for the Offering. ABN AMRO acted as Listing & Paying Agent and as coordinator for the Offering to certain retail investors and as Stabilisation Agent on behalf of the Underwriters. ABN AMRO has acted as Green IPO adviser to NX Filtration.

Enquiries

Hill+Knowlton Strategies

Ariën Stuijt

T: +31 20 404 4707

Arien.Stuijt@hkstrategies.com

DISCLAIMER

These materials are not for release, distribution or publication, whether directly or indirectly and whether in whole or in part, in or into the United States, Canada, Australia, Japan or South Africa or any other jurisdiction where to do so would constitute a violation of the relevant laws of such jurisdiction.

These materials are for information purposes only and are not intended to constitute, and should not be construed as, an offer to sell or a solicitation of any offer to buy the Shares in the capital of NX Filtration N.V. (the "Company", and such Shares, the "Securities") in the United States, Canada, Australia, Japan or South Africa or in any other jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration, exemption from registration or qualification under the securities laws of such jurisdiction.

This announcement is not for publication or distribution, directly or indirectly, in or into the United States. This announcement is not an offer of Securities for sale into the United States. The Securities have not been and will not be registered under the U.S. Securities Act of 1933, as amended, and may not be offered or sold in the United States, except pursuant to an applicable exemption from registration. No public offering of Securities is being made in the United States.

In the United Kingdom, this document and any other materials in relation to the Securities is only being distributed to, and is only directed at, and any investment or investment activity to which this document relates is available only to, and will be engaged in only with, "qualified investors" (within the meaning of the Prospectus Regulation (EU) 2017/1129 as it forms part of retained EU law by virtue of the European Union (Withdrawal) Act 2018) and who are (i) persons having professional experience in matters relating to investments who fall within the definition of "investment professionals" in Article 19(5) of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005 (the "Order"); or (ii) high net worth entities falling within Article 49(2)(a) to (d) of the Order (all such persons together being referred to as "relevant persons"). Persons who are not relevant persons should not take any action on the basis of this document and should not act or rely on it.

The Company has not authorised any offer to the public of Securities in any Member State of the European Economic Area other than the Netherlands. With respect to any Member State of the European Economic Area, other than the Netherlands (each a "Relevant Member State"), no action has been undertaken or will be undertaken to make an offer to the public of Securities requiring publication of a prospectus in any Relevant Member State. As a result, the Securities may only be offered in Relevant Member States (i) to any person or legal entity which is a qualified investor within the meaning of Article 2(e) of the Prospectus Regulation; or (ii) in any other circumstances falling within Article 1(4) of the Prospectus Regulation. For the purpose of this paragraph, the expression "offer of securities to the public" means the communication in any form and by any means of sufficient information on the terms of the offer and the Securities to be offered so as to enable the investor to decide to purchase or subscribe for the Securities and the expression "Prospectus Regulation" means Regulation (EU) 2017/1129 and includes any amendments thereto.

No action has been taken by the Company that would permit an offer of Securities or the possession or distribution of these materials or any other offering or publicity material relating to such Securities in any jurisdiction where action for that purpose is required.

The release, publication or distribution of these materials in certain jurisdictions may be restricted by law and therefore persons in such jurisdictions into which they are released, published or distributed, should inform themselves about, and observe, such restrictions.

These materials may include statements, including the Company's financial and operational mediumterm objectives that are, or may be deemed to be, ''forward-looking statements''. These forward-looking statements may be identified by the use of forward-looking terminology, including the terms ''believes'', "aims", "forecasts", ''estimates'', ''plans'', ''anticipates'', ''expects'', ''intends'', ''may'', ''will'' or ''should'' or, in each case, their negative or other variations or comparable terminology, or by discussions of strategy, plans, objectives, goals, future events or intentions. Forward-looking statements may and often do differ materially from actual results. Any forward-looking statements reflect the Company's current view with respect to future events and are subject to risks relating to future events and other risks, uncertainties and assumptions relating to the Company's business, results of operations, financial position, liquidity, prospects, growth or strategies. Forward-looking statements speak only as of the date they are made.

Each of the Company, as well as Berenberg and ABN AMRO and their respective affiliates expressly disclaims any obligation or undertaking to update, review or revise any forward-looking statement contained in these materials whether as a result of new information, future developments or otherwise.

The Underwriters are acting exclusively for the Company and no one else in connection with any offering of Securities. They will not regard any other person as their respective clients in relation to any offering of Securities and will not be responsible to anyone other than the Company for providing the protections afforded to their respective clients nor for providing advice in relation to any offering of Securities, the contents of these materials or any transaction, arrangement or other matter referred to herein. None of the Underwriters or any of their respective subsidiary undertakings, affiliates or any of their respective directors, officers, employees, advisers, agents, alliance partners or any other entity or person accepts any responsibility or liability whatsoever for, or makes any representation, warranty or undertaking, express or implied, as to the truth, accuracy, completeness or fairness of the information or opinions in these materials (or whether any information has been omitted from these materials) or any other information relating to the group, its subsidiaries or associated companies, whether written, oral or in a visual or electronic form, and howsoever transmitted or made available or for any loss howsoever arising from any use of these materials or its contents or otherwise arising in connection therewith. Accordingly, the Underwriters disclaim, to the fullest extent permitted by applicable law, all and any liability, whether arising in tort or contract or that they might otherwise be found to have in respect of these materials and/or any such statement.

This announcement does not constitute a prospectus. An offer to acquire Securities pursuant to the proposed offering will be made, and any investor should make his investment, solely on the basis of information that will be contained in the Prospectus to be made generally available in the Netherlands in connection with such offering. When made generally available, copies of the Prospectus may be obtained at no cost from the Company or through the website of the Company.

This document contains information that qualifies as inside information within the meaning of Article 7(1) of Regulation (EU) No 596/2014 on market abuse.

Information for distributors

Solely for the purposes of the product governance requirements contained within: (a) EU Directive 2014/65/EU on markets in financial instruments, as amended ("MiFID II"); (b) Articles 9 and 10 of

Commission Delegated Directive (EU) 2017/593 supplementing MiFID II; and (c) local implementing measures (together, the "MiFID II Product Governance Requirements"), and disclaiming all and any liability, whether arising in tort, contract or otherwise, which any "manufacturer" (for the purposes of the MiFID II Product Governance Requirements) may otherwise have with respect thereto, the Offer Shares subject of the Offering have been subject to a product approval process, which has determined that such Offer Shares are: (i) compatible with an end target market of retail investors and investors who meet the criteria of professional clients and eligible counterparties, each as defined in MiFID II; and (ii) eligible for distribution through all distribution channels as are permitted by MiFID II (the "Target Market Assessment"). Notwithstanding the Target Market Assessment, "distributors" (for the purposes of the MiFID II Product Governance Requirements) should note that: the price of the Offer Shares may decline and investors could lose all or part of their investment; the Offer Shares offer no guaranteed income and no capital protection; and an investment in the Offer Shares is compatible only with investors who do not need a guaranteed income or capital protection, who (either alone or in conjunction with an appropriate financial or other adviser) are capable of evaluating the merits and risks of such an investment and who have sufficient resources to be able to bear any losses that may result therefrom. The Target Market Assessment is without prejudice to the requirements of any contractual, legal or regulatory selling restrictions in relation to the Offering.

For the avoidance of doubt, the Target Market Assessment does not constitute: (a) an assessment of suitability or appropriateness for the purposes of MiFID II; or (b) a recommendation to any investor or group of investors to invest in, or purchase, or take any other action whatsoever with respect to the Offer Shares.

Each distributor is responsible for undertaking its own target market assessment in respect of the Offer Shares and determining appropriate distribution channels.