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 THAT JURISDICTION

FOR IMMEDIATE RELEASE

14 October 2025

RECOMMENDED CASH ACQUISITION

of

Spirent Communications plc ("Spirent")

by

Keysight Technologies Inc. ("Keysight")

to be effected by means of a scheme of arrangement under

 Part 26 of the Companies Act 2006

SCHEME SANCTIONED BY COURT

On 28 March 2024, the boards of Spirent and Keysight announced that they had reached an agreement on the terms and conditions of a recommended all-cash acquisition of the entire issued and to be issued ordinary share capital of Spirent (the "Acquisition"), to be effected through a Court-sanctioned scheme of arrangement under Part 26 of the Companies Act 2006 (the "Scheme").

Further to the announcement made on 22 May 2024 in relation to the results of the Court Meeting and General Meeting and the announcement made on 29 September 2025 in relation to the receipt of applicable regulatory approvals, Spirent is pleased to announce that the Court has today sanctioned the Scheme by which the Acquisition is being implemented.

The Scheme will become effective upon, and remains conditional on, the Court Order being delivered to the Registrar of Companies, which is expected to occur on 15 October 2025. The Scheme Record Time is expected to be 6.00 p.m. on 15 October 2025.

Applications have been made for the suspension of: (i) trading in Spirent Shares on the London Stock Exchange's main market for listed securities (the "Main Market"); and (ii) the listing of Spirent Shares on the Official List, and such suspensions are expected to take effect from 7:30 a.m. on 16 October 2025. The last day for dealings in, and for registration of transfers of, and disablement in CREST of, Spirent Shares is therefore expected to be 15 October 2025.

Applications have also been made for the: (i) de-listing of Spirent Shares from the Official List; and (ii) cancellation of the admission to trading in Spirent Shares on the Main Market, and such de-listing and cancellation is expected, subject to the Scheme becoming Effective, to take effect by 7:30 a.m. on 17 October 2025.

Other

All references to times in this announcement are to London time, unless otherwise stated.

Defined terms used but not defined in this announcement have the meanings set out in the Scheme Document dated 25 April 2024.

Enquiries:

Linklaters LLP is retained as legal adviser to Spirent.

Important notices

UBS AG London Branch ("UBS") is authorised and regulated by the Financial Market Supervisory Authority in Switzerland. It is authorised by the Prudential Regulation Authority and subject to regulation by the Financial Conduct Authority and limited regulation by the Prudential Regulation Authority in the UK. UBS is acting exclusively as corporate broker and financial adviser to Spirent and no one else in connection with the Acquisition. In connection with such matters, UBS will not regard any other person as its client, nor will it be responsible to any other person for providing the protections afforded to its clients or for providing advice in relation to the Acquisition, the contents of this announcement or any other matter referred to herein.

N.M. Rothschild & Sons Limited ("Rothschild & Co"), which is authorised and regulated by the Financial Conduct Authority in the UK, is acting exclusively as financial adviser to Spirent and no one else in connection with the Acquisition and will not be responsible to anyone other than Spirent for providing the protections afforded to clients of Rothschild & Co nor for providing advice in connection with the Acquisition or any matter referred to herein. Neither Rothschild & Co nor any of its affiliates (nor their respective directors, officers, employees or agents) owes or accepts any duty, liability or responsibility whatsoever (whether direct or indirect, whether in contract, in tort, under statute or otherwise) to any person who is not a client of Rothschild & Co in connection with this announcement, any statement contained in this announcement, the acquisition of Spirent or otherwise. No representation or warranty, express or implied, is made by Rothschild & Co as to the contents of this announcement.

Jefferies International Limited ("Jefferies") is authorised and regulated in the UK by the Financial Conduct Authority. Jefferies is acting exclusively as financial adviser and corporate broker to Spirent and no one else in connection with the Acquisition and will not be responsible to anyone other than Spirent for providing the protections afforded to clients of Jefferies nor for providing advice in connection with the Acquisition or any matter referred to herein. Neither Jefferies nor any of its affiliates (nor their respective directors, officers, employees or agents) owes or accepts any duty, liability or responsibility whatsoever (whether direct or indirect, whether in contract, in tort, under statute or otherwise) to any person who is not a client of Jefferies in connection with this announcement, any statement contained in this announcement, the Acquisition or otherwise. No representation or warranty, express or implied, is made by Jefferies as to the contents of this announcement.

This announcement is for information purposes only and is not intended to, and does not, constitute, or form part of any offer to sell, or an invitation to purchase, any securities or the solicitation of an offer to buy any securities, or of any vote or approval in any jurisdiction, pursuant to the Acquisition or otherwise.

This announcement has been prepared for the purpose of complying with English law and the Takeover Code and the information disclosed may not be the same as that which would have been disclosed if this announcement had been prepared in accordance with the laws and regulations of jurisdictions other than England and Wales.

Disclosure requirements of the Takeover Code (the "Code")

Under Rule 8.3(a) of the Code, any person who is interested in 1% or more of any class of relevant securities of an offeree company or of any securities exchange offeror (being any offeror other than an offeror in respect of which it has been announced that its offer is, or is likely to be, solely in cash) must make an Opening Position Disclosure following the commencement of the offer period and, if later, following the announcement in which any securities exchange offeror is first identified. 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) 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 becomes, interested in 1% or more of any class of relevant securities of the offeree company or of any securities exchange offeror must make a Dealing Disclosure if the person deals in any relevant securities of the offeree company or of any securities exchange offeror. 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. A Dealing Disclosure by a person to whom Rule 8.3(b) applies must be made by no later than 3.30 pm (London time) on the business day following the date of the relevant dealing.

If two or more persons act together pursuant to an agreement or understanding, whether formal or informal, to acquire or control an interest in relevant securities of an offeree company or a securities exchange offeror, they will be deemed to be a single person for the purpose of Rule 8.3.

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).

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 http://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.

Publication on Website

In accordance with Rule 26.1 of the Code, a copy of this announcement will be made available, subject to certain restrictions relating to persons resident in restricted jurisdictions on Spirent's and Keysight's websites at https://corporate.spirent.com and http://investor.keysight.com/investor-resources/proposed-acquisition-of-spirent respectively by no later than 12 noon (London time) on the business day following the date of this announcement. For the avoidance of doubt, the contents of those websites are not incorporated and do not form part of this announcement.