National Storage Mechanism | Additional information

TR-1: Standard form for notification of major holdings

1. Issuer Details

ISIN

GB0006963689

Issuer Name

PORVAIR PLC

UK or Non-UK Issuer

2. Reason for Notification

An acquisition or disposal of voting rights

3. Details of person subject to the notification obligation

Name

Impax Asset Management Group plc

City of registered office (if applicable)

London

Country of registered office (if applicable)

United Kingdom

4. Details of the shareholder

Full name of shareholder(s) if different from the person(s) subject to the notification obligation, above

City of registered office (if applicable)

Country of registered office (if applicable)

5. Date on which the threshold was crossed or reached

21-Jul-2025

6. Date on which Issuer notified

23-Jul-2025

7. Total positions of person(s) subject to the notification obligation

	% of voting rights attached to shares (total of 8.A)	% of voting rights through financial instruments (total of 8.B 1 + 8.B 2)	Total of both in % (8.A + 8.B)	Total number of voting rights held in issuer
Resulting situation on the date on which threshold was crossed or reached	0.000000	0.000000	0.000000	0
Position of previous notification (if applicable)

8. Notified details of the resulting situation on the date on which the threshold was crossed or reached

8A. Voting rights attached to shares

Class/Type of shares ISIN code(if possible)	Number of direct voting rights (DTR5.1)	Number of indirect voting rights (DTR5.2.1)	% of direct voting rights (DTR5.1)	% of indirect voting rights (DTR5.2.1)
GB0006963689	0	0	0.000000	0.000000
Sub Total 8.A	0		0.000000%

8B1. Financial Instruments according to (DTR5.3.1R.(1) (a))

Type of financial instrument	Expiration date	Exercise/conversion period	Number of voting rights that may be acquired if the instrument is exercised/converted	% of voting rights

Sub Total 8.B1

8B2. Financial Instruments with similar economic effect according to (DTR5.3.1R.(1) (b))

Type of financial instrument	Expiration date	Exercise/conversion period	Physical or cash settlement	Number of voting rights	% of voting rights

Sub Total 8.B2

9. Information in relation to the person subject to the notification obligation

2. 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)

Ultimate controlling person	Name of controlled undertaking	% of voting rights if it equals or is higher than the notifiable threshold	% of voting rights through financial instruments if it equals or is higher than the notifiable threshold	Total of both if it equals or is higher than the notifiable threshold
Impax Asset Management Group plc	Impax Asset Management Limited	0.000000	0.000000	0.000000%

10. In case of proxy voting

Name of the proxy holder

The number and % of voting rights held

The date until which the voting rights will be held

11. Additional Information

Impax Asset Management Group plc (Impax Group) is the parent company (parent undertaking) of Impax Asset Management Limited (IAML) - a controlled undertaking of Impax Group. IAML is the delegated investment man-ager with delegated voting rights on behalf of the managed portfolios. The shares are managed by IAML on behalf of underlying clients whereby the client has delegated the exercise of voting power. IAML is also the dele-gated investment manager of the shares and voting rights for Impax Asset Management (AIFM) Limited funds, our Impax Asset Management Ireland (UCITS) funds, and certain Impax Asset Management LLC funds.

12. Date of Completion

23-Jul-2025

13. Place Of Completion

London, United Kingdom