Shareholder Communications

Porvair has, today, posted a circular to shareholders requesting them, should they wish, to accept electronic communications from the Company. This has several advantages for all stakeholders; increasing the speed of communication, reducing print and distribution costs, and is in line with the Group's sustainability goals.

The circular gives shareholders 28 days from today's date to respond to the Company's Registrar. A copy of the text of the circular is attached to this release.

Shareholder communications

The majority of shareholders choose to receive Annual Reports and Notices of meetings electronically. This has a number of advantages for the Company and shareholders. It increases the speed of communication, saves you time, reduces print and distribution costs, and our impact on the environment.

Company law requires that the Company asks shareholders to consent to the receipt of communications electronically and via a website*. If you consent to website publication you will continue to be notified in writing and through the release of an announcement on the London Stock Exchange each time the Company places a statutory communication on the website. Annual Reports and other documents which are required to be sent to shareholders ('shareholder information') are published on our website at www.porvair.com/investors. If you consent, the website will be the way in which you access all future shareholder information. You still have the right to request hard copies of shareholder information at no charge, should you wish.

• If you would like to receive shareholder information by means of our website, there is nothing more you need to do. You will be notified by post when shareholder information has been placed on the website.
• If you would like to receive notifications by email, you can register your email address via the Share Portal https://www.signalshares.com or write to FREEPOST SAS, 29 Wellington Street, LS1 4DL (no stamp or further address detail is required. Please write in BLOCK CAPITALS).

If you hold your shares corporately or in a CREST account, you are not able to use the Share Portal to inform us of your preferred method of communication and should instead write to FREEPOST SAS, 29 Wellington Street, LS1 4DL (no stamp or further address detail is required. Please write in BLOCK CAPITALS).

If we do not receive a reply from you within 28 days of the date of dispatch of this notice, you will be deemed to have consented to website publication of shareholder information and you will not receive hard copies of shareholder information in the post.

* The Company reserves the right to send hard copy documents to shareholders where, for example, overseas securities laws do not permit electronic communication or in other circumstances where the Company considers that electronic delivery may not be appropriate.