<div id="readability-page-1"><div>RNS Number : 4514K Porvair PLC 05 December 2025 TR-1: Standard form for notification of major holdings1. Issuer DetailsISINGB0006963689Issuer NamePORVAIR PLCUK or Non-UK IssuerUK2. Reason for NotificationAn acquisition or disposal of voting rights3. Details of person subject to the notification obligationNameG.G.G. S.p.ACity of registered office (if applicable)Porto MantovanoCountry of registered office (if applicable)Italy4. Details of the shareholder<div><table><tbody><tr><td>Name</td><td>GIORGIO GIRONDI</td></tr><tr><td>City of registered office</td><td>PORTO MANTOVANO</td></tr><tr><td>Country of registered office</td><td>ITALY</td></tr></tbody></table></div>5. Date on which the threshold was crossed or reached05-Dec-20256. Date on which Issuer notified03-Dec-20257. Total positions of person(s) subject to the notification obligation<div><table><tbody><tr><td></td><td>% of voting rights attached to shares (total of 8.A)</td><td>% of voting rights through financial instruments (total of 8.B 1 + 8.B 2)</td><td>Total of both in % (8.A + 8.B)</td><td>Total number of voting rights held in issuer</td></tr><tr><td>Resulting situation on the date on which threshold was crossed or reached</td><td>27.080000</td><td>0.000000</td><td>27.080000</td><td>12592531</td></tr><tr><td>Position of previous notification (if applicable)</td><td>26.020000</td><td>0.000000</td><td>26.020000</td><td></td></tr></tbody></table></div>8. Notified details of the resulting situation on the date on which the threshold was crossed or reached8A. Voting rights attached to shares<div><table><tbody><tr><td>Class/Type of shares ISIN code(if possible)</td><td>Number of direct voting rights (DTR5.1)</td><td>Number of indirect voting rights (DTR5.2.1)</td><td>% of direct voting rights (DTR5.1)</td><td>% of indirect voting rights (DTR5.2.1)</td></tr><tr><td>GB0006963689</td><td>12592531</td><td></td><td>27.080000</td><td></td></tr><tr><td>Sub Total 8.A</td><td colspan="2">12592531</td><td colspan="2">27.080000%</td></tr></tbody></table></div>8B1. Financial Instruments according to (DTR5.3.1R.(1) (a))<div><table><tbody><tr><td>Type of financial instrument</td><td>Sub Total 8.B1</td></tr><tr><td>Expiration date</td><td colspan="2"></td></tr><tr><td>Exercise/conversion period</td><td></td></tr><tr><td>Number of voting rights that may be acquired if the instrument is exercised/converted</td><td></td></tr><tr><td>% of voting rights</td></tr></tbody></table></div>8B2. Financial Instruments with similar economic effect according to (DTR5.3.1R.(1) (b))<div><table><tbody><tr><td>Type of financial instrument</td><td>Sub Total 8.B2</td></tr><tr><td>Expiration date</td><td colspan="3"></td></tr><tr><td>Exercise/conversion period</td><td></td></tr><tr><td>Physical or cash settlement</td><td></td></tr><tr><td>Number of voting rights</td></tr><tr><td>% of voting rights</td></tr></tbody></table></div>9. Information in relation to the person subject to the notification obligation2. Full chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held starting with the ultimate controlling natural person or legal entities (please add additional rows as necessary)<div><table><tbody><tr><td>Ultimate controlling person</td><td>GIORGIO GIRONDI</td></tr><tr><td>Name of controlled undertaking</td><td>GGG SPA</td></tr><tr><td>% of voting rights if it equals or is higher than the notifiable threshold</td><td>27.080000</td></tr><tr><td>% of voting rights through financial instruments if it equals or is higher than the notifiable threshold</td><td></td></tr><tr><td>Total of both if it equals or is higher than the notifiable threshold</td><td>27.080000%</td></tr></tbody></table></div>10. In case of proxy votingName of the proxy holderThe number and % of voting rights heldThe date until which the voting rights will be held11. Additional Information12. Date of Completion05-Dec-202513. Place Of CompletionPorto MantovanoThis information is provided by RNS, the news service of the London Stock Exchange. RNS is approved by the Financial Conduct Authority to act as a Primary Information Provider in the United Kingdom. Terms and conditions relating to the use and distribution of this information may apply. For further information, please contact rns@lseg.com or visit www.rns.com.RNS may use your IP address to confirm compliance with the terms and conditions, to analyse how you engage with the information contained in this communication, and to share such analysis on an anonymised basis with others as part of our commercial services. For further information about how RNS and the London Stock Exchange use the personal data you provide us, please see our Privacy Policy. END HOLPKPBDCBDKFBK</div></div>

Porvair PLC has announced a change in major holdings, with G.G.G. S.p.A acquiring 27.08% of voting rights. The notification was made on December 3, 2025, with the threshold being crossed on December 5, 2025. The acquisition involves direct voting rights attached to shares, with no financial instruments involved. The ultimate controlling person is Giorgio Girondi, and the registered office is in Porto Mantovano, Italy.

REG - Porvair PLC GGG S.p.A. - Holding(s) in Company