Major shareholder announcement

Aquaporin A/S, Nymøllevej 78, DK-2800 Kongens Lyngby, aquaporin.com, Company registration no.: DK28315694

Company announcement
No. 18/2023

Kongens Lyngby, Denmark, March 7, 2023– Pursuant to section 38(1) of the Danish Capital Markets Act, Aquaporin A/S (ticker: AQP), (“Aquaporin” or the “Company”) hereby notifies receipt of major shareholder notification from Topsøe Holding A/S.

Topsøe Holding A/S has notified Aquaporin that Topsøe Holding A/S has increased its direct shareholding and holds an aggregate of 573,219 shares and voting rights in the Company corresponding to 5.24% of the share capital and voting rights of Aquaporin. This announcement is being made in accordance with section 30 of the Danish Capital Markets Act.

For further information, please contact:

Klaus Juhl Wulff, Chief Financial Officer

+45 53 55 55 19, investorrelations@aquaporin.com

About Aquaporin A/S
Aquaporin is an innovative water technology company dedicated to natural water treatment with operations in Denmark (HQ), Singapore, Turkey, China, and the United States. Aquaporin works to preserve the Earth’s most valuable resource – water – by combining advanced bioengineering, membrane chemistry, open innovation, and natural aquaporins – nature's own water purifiers – which they embed into water purification membranes. Their proprietary technology, Aquaporin Inside®, is based on Nobel Prize-winning research and used to clean and reuse water in industries, in our homes, and even by NASA in space. Aquaporin works with customers and partners around the globe to sustainably treat industrial wastewater, concentrate food & beverage products, and enhance drinking water quality and accessibility.