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

13 January 2021

G4S plc (the “Company” or “G4S”)

Allied Universal Offer: Employee Representatives’ Opinion

G4S announces that it has received an opinion from the G4S European Works Council on the effects of the offer by Atlas UK Bidco Limited, a newly incorporated entity that is indirectly controlled by Allied Universal Topco LLC, to acquire the entire issued and to be issued ordinary share capital of G4S.

G4S has published the opinion on its website at https://www.g4s.com/investors/offers in accordance with Rule 25.9 of the City Code on Takeovers and Mergers (the “Code”).

For further enquiries, please contact:

G4S plc

Helen Parris                           Director of Investor Relations              +44 (0) 207 9633189

Media enquiries

Sophie McMillan                                Head of Media                        +44 (0) 759 5523483

Press office                                                                                    +44 (0) 207 9633333

G4S Joint Lead Financial Advisers and Corporate Brokers

Citigroup Global Markers Limited

J.P. Morgan Cazenove

G4S Financial Advisers

Lazard & Co., Limited

Goldman Sachs International

G4S Legal Advisers

Linklaters LLP

Media Advisers

Brunswick

Important Notices

Citigroup Global Markets Limited ("Citi"), which is authorised by the Prudential Regulation Authority (”PRA”) and regulated in the UK by the Financial Conduct Authority (”FCA”) and the PRA, is acting exclusively for G4S and no one else in connection with the matters set out in this announcement and will not regard any other person as its client in relation to the matters in this announcement and will not be responsible to anyone other than G4S for providing the protections afforded to clients of Citi nor for providing advice in relation to any matter referred to herein.

J.P. Morgan Securities plc (which conducts its UK investment banking business as J.P. Morgan Cazenove) ("J.P. Morgan Cazenove") which is authorised in the United Kingdom by the PRA and regulated in the United Kingdom by the PRA and the FCA, is acting as financial adviser exclusively for G4S plc and no one else in connection with the matters set out in this announcement and will not regard any other person as its client in relation to the matters set out in this announcement and will not be responsible to anyone other than G4S plc for providing the protections afforded to clients of J.P. Morgan Cazenove or its affiliates, nor for providing advice in relation to any matter referred to herein.

Lazard & Co., Limited, which is authorised and regulated in the United Kingdom by the Financial Conduct Authority, is acting exclusively as financial adviser to G4S and no one else in connection with the matters set out in this announcement and will not be responsible to anyone other than G4S for providing the protections afforded to clients of Lazard & Co., Limited nor for providing advice in relation to the matters set out in this announcement. Neither Lazard & Co., Limited nor any of its affiliates 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 Lazard & Co., Limited in connection with this announcement, any statement contained herein or otherwise.

Goldman Sachs International (“Goldman Sachs”), which is authorised in the United Kingdom by the PRA and regulated in the United Kingdom by the PRA and the FCA, is acting exclusively for G4S and no one else in connection with the matters set out in this announcement. Goldman Sachs will not be responsible to anyone other than G4S for providing the protections afforded to clients of Goldman Sachs nor for providing advice in relation to any matter referred to herein.

Disclosure requirements of 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

A copy of this announcement will be made available at www.g4s.com/investors/offers, by no later than 12 noon (London time) on the business day following this announcement. For the avoidance of doubt, the contents of this website are not incorporated into and do not form part of this announcement.