NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION, IN WHOLE OR IN PART, IN, INTO OR FROM ANY JURISDICTION WHERE TO DO SO WOULD CONSTITUTE A VIOLATION OF THE RELEVANT LAWS OF SUCH JURISDICTION

FOR IMMEDIATE RELEASE

17 September 2026

Harworth Group plc

("Harworth")

Rule 2.9 Announcement

Harworth has allotted and issued a further 31,422 new ordinary shares of 10 pence each, pursuant to its block listing facility, in satisfaction of the exercise of share options granted under Harworth’s Save As You Earn Scheme. In accordance with Rule 2.9 of the City Code on Takeovers and Mergers (the “Code”), Harworth confirms that, as at the date and time of this announcement, it has in issue 326,987,774 ordinary shares of 10 pence each. The ordinary shares are admitted to trading on the main market of the London Stock Exchange.

The International Securities Identification Number of the ordinary shares is GB00BYZJ7G42 and Harworth’s LEI number is 213800R8JSSGK2KPFG21.

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Enquiries

Publication on a website

In accordance with Rule 26.1 of the City Code on Takeovers and Mergers, a copy of this announcement will be available at www.harworthgroup.com/investors/unrecommended-offer-landing-page/ by no later than 12 noon (London time) on the business day following the date of this announcement. The content of the website referred to in this announcement is not incorporated into and does not form part of this announcement.

Disclosure requirements of the Code

Under Rule 8.3(a) of the Code, any person who at the relevant time is interested (directly or indirectly) in 1% or more of any class of relevant securities of the offeree company or any securities exchange offeror must make a public Opening Position Disclosure (i) after the commencement of an offer period; and (ii) if later, after the announcement that first identifies any securities exchange offeror. An Opening Position Disclosure must contain details of the person's interests and short positions in, and rights to subscribe for, any relevant securities of each of (i) the offeree company and (ii) any securities exchange offeror(s). An Opening Position Disclosure by a person to whom Rule 8.3(a) of the Code applies must be made by no later than 3.30 pm (London time) on the 10th business day following the commencement of the offer period and, if appropriate, by no later than 3.30 pm (London time) on the 10th business day following the announcement in which any securities exchange offeror is first identified. Relevant persons who deal in the relevant securities of the offeree company or of a securities exchange offeror prior to the deadline for making an Opening Position Disclosure must instead make a Dealing Disclosure.

Under Rule 8.3(b) of the Code, any person who is (or as a result of any dealing becomes) interested (directly or indirectly) in 1% or more of any class of relevant securities of the offeree company or any securities exchange offeror must make a public Dealing Disclosure if the person deals in any relevant securities of the offeree company or any securities exchange offeror during an offer period. A Dealing Disclosure must contain details of the dealing concerned and of the person's interests and short positions in, and rights to subscribe for, any relevant securities of each of (i) the offeree company and (ii) any securities exchange offeror(s), save to the extent that these details have previously been disclosed under Rule 8 of the Code. A Dealing Disclosure by a person to whom Rule 8.3(b) of the Code applies must be made by no later than 3.30 pm (London time) on the business day following the date of the relevant dealing.

Where two or more persons act pursuant to an agreement or understanding, whether formal or informal, to acquire or control an interest in relevant securities, they will normally be deemed to be a single person for the purpose of this Rule 8.3 of the Code. Opening Position Disclosures must also be made by the offeree company and by any offeror and Dealing Disclosures must also be made by the offeree company, by any offeror and by any persons acting in concert with any of them (see Rules 8.1, 8.2 and 8.4 of the Code).

Details of the offeree and offeror companies in respect of whose relevant securities Opening Position Disclosures and Dealing Disclosures must be made can be found in the Disclosure Table on the Takeover Panel's website at www.thetakeoverpanel.org.uk, including details of the number of relevant securities in issue, when the offer period commenced and when any offeror was first identified. You should contact the Panel's Market Surveillance Unit on +44 (0)20 7638 0129 if you are in any doubt as to whether you are required to make an Opening Position Disclosure or a Dealing Disclosure.