Dj Hartford Insurance Group Inc. Stock Climbs 3.9%, Outperforms Peers

TR-1: Standard form for notification of major holdings

1. Issuer Details

ISIN

GB0006963689

Issuer Name

PORVAIR PLC

UK or Non-UK Issuer

UK

2. Reason for Notification

An acquisition or disposal of voting rights

3. Details of person subject to the notification obligation

Name

BlackRock, Inc.

City of registered office (if applicable)

Wilmington

Country of registered office (if applicable)

USA

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

10-Dec-2025

6. Date on which Issuer notified

11-Dec-2025

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

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

8A. Voting rights attached to shares

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

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

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)

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

BlackRock Regulatory Threshold Reporting Team

Jana Blumenstein

020 7743 3650

12. Date of Completion

11th December 2025

13. Place Of Completion

12 Throgmorton Avenue, London, EC2N 2DL, U.K.

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FORM 8.3

IRISH TAKEOVER PANEL

OPENING POSITION DISCLOSURE/DEALING DISCLOSURE UNDER RULE 8.3 OF THE IRISH TAKEOVER PANEL ACT, 1997, TAKEOVER

RULES, 2022 BY PERSONS WITH INTERESTS IN RELEVANT SECURITIES REPRESENTING 1% OR MORE

1.             KEY INFORMATION

2.             INTERESTS AND SHORT POSITIONS

If there are interests and short positions to disclose in more than one class of relevant securities of the offeror or offeree named in 1(c), copy table 2 for each additional class of relevant security.

Interests and short positions in the relevant securities of the offeror or offeree to which the disclosure relates following the dealing (if any)

(Note 2)

All interests and all short positions should be disclosed.

Details of options including rights to subscribe for new securities and any open stock-settled derivative positions (including traded options), or agreements to purchase or sell relevant securities, should be given on a Supplemental Form 8.

3.             DEALINGS (IF ANY) BY THE PERSON MAKING THE DISCLOSURE (Note 4)

Where there have been dealings in more than one class of relevant securities of the offeror or offeree named in 1(c), copy table 3(a), (b), (c) or (d) (as appropriate) for each additional class of relevant security dealt in.

The currency of all prices and other monetary amounts should be stated.

(a)           Purchases and sales

(b)           Cash-settled derivative transactions

• Class of relevant security

• Product

  description

  e.g. CFD

• Nature of dealing

  e.g. opening/ closing a long/ short position, increasing/ reducing a long/ short position

• Number of

  reference

  securities

  (Note 6)

• Price

  per unit

  (Note 5)

(c)           Stock-settled derivative transactions (including options)

(i)            Writing, selling, purchasing or varying

• Class of relevant security

• Product

  description e.g. call

  option

• Writing, purchasing, selling, varying

  etc.

• Number of

  securities to which option relates (Note 6)

• Exercise

  price per

  unit

• Type

  e.g. American,

  European etc.

• Expiry

  date

• Option money

  paid/

  received per unit

(ii)           Exercise

• Class of relevant security

• Product description

  e.g. call option

• Exercising/

  exercised against

• Number of securities

• Exercise price per unit (Note 5)

(d)           Other dealings (including transactions in respect of new securities) (Note 3)

4.             OTHER INFORMATION

(a)           Indemnity and other dealing arrangements

Details of any indemnity or option arrangement, or any agreement or understanding, formal or informal, relating to relevant securities which may be an inducement to deal or refrain from dealing entered into by the person making the disclosure and any party to the offer or any person acting in concert with a party to the offer.

Irrevocable commitments and letters of intent should not be included. If there are no such agreements, arrangements or understandings, state "none"

(b)           Agreements, arrangements or understandings relating to options or derivatives

Full details of any agreement, arrangement or understanding between the person disclosing and any other person relating to the voting rights of any relevant securities under any option referred to on this form or relating to the voting rights or future acquisition or disposal of any relevant securities to which any derivative referred to on this form is referenced. If none, this should be stated.

(c)           Attachments

• Is a Supplemental Form 8 attached?

• NO

Public disclosures under Rule 8.3 of the Rules must be made to a Regulatory Information Service.

NOTES ON FORM 8.3

1.             See the definition of "connected fund manager" in Rule 2.2 of Part A of the Rules.

2.             See the definition of "interest in a relevant security" in Rule 2.5 of Part A of the Rules and see Rule 8.6(a) and (b) of Part B of the Rules.

3.             See the definition of "relevant securities" in Rule 2.1 of Part A of the Rules.

4.             See the definition of "dealing" in Rule 2.1 of Part A of the Rules.

5.             If the economic exposure to changes in the price of securities is limited, for example, by virtue of a stop loss arrangement relating to a spread bet, full details must be given.

6.             See Rule 2.5(d) of Part A of the Rules.

7.             If details included in a disclosure under Rule 8 are incorrect, they should be corrected as soon as practicable in a subsequent disclosure. Such disclosure should state clearly that it corrects details disclosed previously, identify the disclosure or disclosures being corrected, and provide sufficient detail for the reader to understand the nature of the corrections. In the case of any doubt, the Panel should be consulted.

For full details of disclosure requirements, see Rule 8 of the Rules. If in doubt, consult the Panel.

References in these notes to "the Rules" are to the Irish Takeover Panel Act, 1997, Takeover Rules, 2022.

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FORM 8.3

PUBLIC OPENING POSITION DISCLOSURE/DEALING DISCLOSURE BY

A PERSON WITH INTERESTS IN RELEVANT SECURITIES REPRESENTING 1% OR MORE

Rule 8.3 of the Takeover Code (the "Code")

1.         KEY INFORMATION

2.         POSITIONS OF THE PERSON MAKING THE DISCLOSURE

If there are positions or rights to subscribe to disclose in more than one class of relevant securities of the offeror or offeree named in 1(c), copy table 2(a) or (b) (as appropriate) for each additional class of relevant security.

(a)        Interests and short positions in the relevant securities of the offeror or offeree to which the disclosure relates following the dealing (if any)

*BlackRock, Inc. does not have voting authority over 2,983,188 shares, however investment discretion is retained.

All interests and all short positions should be disclosed.

Details of any open stock-settled derivative positions (including traded options), or agreements to purchase or sell relevant securities, should be given on a Supplemental Form 8 (Open Positions).

(b)        Rights to subscribe for new securities (including directors' and other employee options)

• Class of relevant security in relation to which subscription right exists:

• Details, including nature of the rights concerned and relevant percentages:

3.         DEALINGS (IF ANY) BY THE PERSON MAKING THE DISCLOSURE

Where there have been dealings in more than one class of relevant securities of the offeror or offeree named in 1(c), copy table 3(a), (b), (c) or (d) (as appropriate) for each additional class of relevant security dealt in.

The currency of all prices and other monetary amounts should be stated.

(a)        Purchases and sales

(b)        Cash-settled derivative transactions

(c)        Stock-settled derivative transactions (including options)

(i)         Writing, selling, purchasing or varying

• Class of relevant security

• Product description e.g. call option

• Writing, purchasing, selling, varying etc.

• Number of securities to which option relates

• Exercise price per unit

• Type

  e.g. American, European etc.

• Expiry date

• Option money paid/ received per unit

(ii)        Exercise

• Class of relevant security

• Product description

  e.g. call option

• Exercising/ exercised against

• Number of securities

• Exercise price per unit

(d)        Other dealings (including subscribing for new securities)

• Class of relevant security

• Nature of dealing

  e.g. subscription, conversion

• Details

• Price per unit (if applicable)

4.         OTHER INFORMATION

(a)        Indemnity and other dealing arrangements

• Details of any indemnity or option arrangement, or any agreement or understanding, formal or informal, relating to relevant securities which may be an inducement to deal or refrain from dealing entered into by the person making the disclosure and any party to the offer or any person acting in concert with a party to the offer:

  Irrevocable commitments and letters of intent should not be included.  If there are no such agreements, arrangements or understandings, state "none"

• None.

(b)        Agreements, arrangements or understandings relating to options or derivatives

• Details of any agreement, arrangement or understanding, formal or informal, between the person making the disclosure and any other person relating to:

  (i)  the voting rights of any relevant securities under any option; or

  (ii) the voting rights or future acquisition or disposal of any relevant securities to which any derivative is referenced:

  If there are no such agreements, arrangements or understandings, state "none"

• None.

(c)        Attachments

• Is a Supplemental Form 8 (Open Positions) attached?

• No

Public disclosures under Rule 8 of the Code must be made to a Regulatory Information Service. 

The Panel's Market Surveillance Unit is available for consultation in relation to the Code's disclosure requirements on +44 (0)20 7638 0129.

The Code can be viewed on the Panel's website at www.thetakeoverpanel.org.uk.

.

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FORM 8.3

PUBLIC OPENING POSITION DISCLOSURE/DEALING DISCLOSURE BY

A PERSON WITH INTERESTS IN RELEVANT SECURITIES REPRESENTING 1% OR MORE

Rule 8.3 of the Takeover Code (the "Code")

1.         KEY INFORMATION

2.         POSITIONS OF THE PERSON MAKING THE DISCLOSURE

If there are positions or rights to subscribe to disclose in more than one class of relevant securities of the offeror or offeree named in 1(c), copy table 2(a) or (b) (as appropriate) for each additional class of relevant security.

(a)        Interests and short positions in the relevant securities of the offeror or offeree to which the disclosure relates following the dealing (if any)

*BlackRock, Inc. does not have voting authority over 2,298,832 shares, however investment discretion is retained.

All interests and all short positions should be disclosed.

Details of any open stock-settled derivative positions (including traded options), or agreements to purchase or sell relevant securities, should be given on a Supplemental Form 8 (Open Positions).

(b)        Rights to subscribe for new securities (including directors' and other employee options)

• Class of relevant security in relation to which subscription right exists:

• Details, including nature of the rights concerned and relevant percentages:

3.         DEALINGS (IF ANY) BY THE PERSON MAKING THE DISCLOSURE

Where there have been dealings in more than one class of relevant securities of the offeror or offeree named in 1(c), copy table 3(a), (b), (c) or (d) (as appropriate) for each additional class of relevant security dealt in.

The currency of all prices and other monetary amounts should be stated.

(a)        Purchases and sales

(b)        Cash-settled derivative transactions

• Class of relevant security

• Product description

  e.g. CFD

• Nature of dealing

  e.g. opening/closing a long/short position, increasing/reducing a long/short position

• Number of reference securities

• Price per unit

(c)        Stock-settled derivative transactions (including options)

(i)         Writing, selling, purchasing or varying

• Class of relevant security

• Product description e.g. call option

• Writing, purchasing, selling, varying etc.

• Number of securities to which option relates

• Exercise price per unit

• Type

  e.g. American, European etc.

• Expiry date

• Option money paid/ received per unit

(ii)        Exercise

• Class of relevant security

• Product description

  e.g. call option

• Exercising/ exercised against

• Number of securities

• Exercise price per unit

(d)        Other dealings (including subscribing for new securities)

• Class of relevant security

• Nature of dealing

  e.g. subscription, conversion

• Details

• Price per unit (if applicable)

4.         OTHER INFORMATION

(a)        Indemnity and other dealing arrangements

• Details of any indemnity or option arrangement, or any agreement or understanding, formal or informal, relating to relevant securities which may be an inducement to deal or refrain from dealing entered into by the person making the disclosure and any party to the offer or any person acting in concert with a party to the offer:

  Irrevocable commitments and letters of intent should not be included.  If there are no such agreements, arrangements or understandings, state "none"

• None.

(b)        Agreements, arrangements or understandings relating to options or derivatives

• Details of any agreement, arrangement or understanding, formal or informal, between the person making the disclosure and any other person relating to:

  (i)  the voting rights of any relevant securities under any option; or

  (ii) the voting rights or future acquisition or disposal of any relevant securities to which any derivative is referenced:

  If there are no such agreements, arrangements or understandings, state "none"

• None.

(c)        Attachments

• Is a Supplemental Form 8 (Open Positions) attached?

• No

Public disclosures under Rule 8 of the Code must be made to a Regulatory Information Service. 

The Panel's Market Surveillance Unit is available for consultation in relation to the Code's disclosure requirements on +44 (0)20 7638 0129.

The Code can be viewed on the Panel's website at www.thetakeoverpanel.org.uk.

.

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FORM 8.3

PUBLIC OPENING POSITION DISCLOSURE/DEALING DISCLOSURE BY

A PERSON WITH INTERESTS IN RELEVANT SECURITIES REPRESENTING 1% OR MORE

Rule 8.3 of the Takeover Code (the "Code")

1.         KEY INFORMATION

2.         POSITIONS OF THE PERSON MAKING THE DISCLOSURE

If there are positions or rights to subscribe to disclose in more than one class of relevant securities of the offeror or offeree named in 1(c), copy table 2(a) or (b) (as appropriate) for each additional class of relevant security.

(a)        Interests and short positions in the relevant securities of the offeror or offeree to which the disclosure relates following the dealing (if any)

*BlackRock, Inc. does not have voting authority over 466,573 shares, however investment discretion is retained.

All interests and all short positions should be disclosed.

Details of any open stock-settled derivative positions (including traded options), or agreements to purchase or sell relevant securities, should be given on a Supplemental Form 8 (Open Positions).

(b)        Rights to subscribe for new securities (including directors' and other employee options)

• Class of relevant security in relation to which subscription right exists:

• Details, including nature of the rights concerned and relevant percentages:

3.         DEALINGS (IF ANY) BY THE PERSON MAKING THE DISCLOSURE

Where there have been dealings in more than one class of relevant securities of the offeror or offeree named in 1(c), copy table 3(a), (b), (c) or (d) (as appropriate) for each additional class of relevant security dealt in.

The currency of all prices and other monetary amounts should be stated.

(a)        Purchases and sales

(b)        Cash-settled derivative transactions

• Class of relevant security

• Product description

  e.g. CFD

• Nature of dealing

  e.g. opening/closing a long/short position, increasing/reducing a long/short position

• Number of reference securities

• Price per unit

(c)        Stock-settled derivative transactions (including options)

(i)         Writing, selling, purchasing or varying

• Class of relevant security

• Product description e.g. call option

• Writing, purchasing, selling, varying etc.

• Number of securities to which option relates

• Exercise price per unit

• Type

  e.g. American, European etc.

• Expiry date

• Option money paid/ received per unit

(ii)        Exercise

• Class of relevant security

• Product description

  e.g. call option

• Exercising/ exercised against

• Number of securities

• Exercise price per unit

(d)        Other dealings (including subscribing for new securities)

• Class of relevant security

• Nature of dealing

  e.g. subscription, conversion

• Details

• Price per unit (if applicable)

4.         OTHER INFORMATION

(a)        Indemnity and other dealing arrangements

• Details of any indemnity or option arrangement, or any agreement or understanding, formal or informal, relating to relevant securities which may be an inducement to deal or refrain from dealing entered into by the person making the disclosure and any party to the offer or any person acting in concert with a party to the offer:

  Irrevocable commitments and letters of intent should not be included.  If there are no such agreements, arrangements or understandings, state "none"

• None.

(b)        Agreements, arrangements or understandings relating to options or derivatives

• Details of any agreement, arrangement or understanding, formal or informal, between the person making the disclosure and any other person relating to:

  (i)  the voting rights of any relevant securities under any option; or

  (ii) the voting rights or future acquisition or disposal of any relevant securities to which any derivative is referenced:

  If there are no such agreements, arrangements or understandings, state "none"

• None.

(c)        Attachments

• Is a Supplemental Form 8 (Open Positions) attached?

• No

Public disclosures under Rule 8 of the Code must be made to a Regulatory Information Service. 

The Panel's Market Surveillance Unit is available for consultation in relation to the Code's disclosure requirements on +44 (0)20 7638 0129.

The Code can be viewed on the Panel's website at www.thetakeoverpanel.org.uk.

.

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  RETFIFFAFRLLLIE