SERCO GROUP PLC

Shareholders of SERCO GROUP PLC

SERCO GROUP PLC’s ordinary shares are admitted to trading on the Premium segment of the Main Market of the London Stock Exchange, so shareholder disclosure follows the UK’s Disclosure Guidance and Transparency Rules (DTR5) major-shareholding notification regime rather than a private-company shareholder register: only holders whose voting rights cross the 5% (and subsequent) thresholds are required to notify the company via a TR-1 form, and the underlying shares are typically held through nominee and custodian accounts on behalf of the beneficial institutional investors. The most recent verified notifications on record are from FIL Limited (Fidelity), which notified an increase to 5.1337% of voting rights (51,477,739 voting rights), threshold crossed 18 February 2026 and the issuer notified 19 February 2026, and Wellington Management Group LLP, which notified an increase to 5.03% of voting rights (49,179,634 voting rights, held via multiple nominee accounts and equity swap instruments), threshold crossed 29 July 2026 and the issuer notified 30 July 2026. As at 24 April 2026, Serco Group plc reported total voting rights of 994,569,014 following its ongoing share buyback programme. Because only holders above the 5% notification threshold are required to disclose, this profile does not capture the company’s full shareholder base.

Data availability

Classification: Major shareholders only. SERCO GROUP PLC has been exempt from the UK persons-with-significant-control (PSC) register requirement since 11 March 2018 because its shares are admitted to trading on a UK regulated market; no individual ultimate beneficial owner is disclosed under this regime. Shareholder information is limited to major holders that have crossed the 5% DTR5 notification threshold; holdings below this threshold and any subsequent movements are not separately disclosed.

Sources

• Companies House – Persons with Significant Control register, company number 02048608
• Regulatory News Service (RNS) – TR-1 Standard form for notification of major holdings, FIL Limited, 19 February 2026 (via Investegate)
• Regulatory News Service (RNS) – TR-1 Standard form for notification of major holdings, Wellington Management Group LLP, 31 July 2026 (via Investegate/TradingView)
• Regulatory News Service (RNS) – Transactions in Own Shares, Serco Group plc, 24 April 2026 (via Investegate)

Directors and officers of SERCO GROUP PLC

Companies House records 11 active officers of SERCO GROUP PLC as of 22 September 2026, alongside 47 earlier resignations. The active board comprises Group Chief Executive Anthony Andrew Kirby (appointed 1 March 2025), Group Chief Financial Officer Mark James Reid (appointed 6 March 2026), Board Chair Keith Williams (appointed to the Board 1 August 2025), and seven further non-executive directors: Ann Kirsty Bashforth, Krupali Desai, Ian Ramsey Safwat El-Mokadem, Victoria Mary Hull, Timothy Ralph Henry Lodge, Dame Susan Jane Owen and Lynne Peacock. Company Secretary Amanda Miller was appointed 1 October 2025. All active officers are recorded with British nationality (Mark James Reid also holds French nationality) and a country of residence in the United Kingdom or England. This overview reflects Companies House officer data reviewed 22 September 2026.

Recent officer changes

• Mark James Reid appointed Director and Group Chief Financial Officer, 6 March 2026, succeeding Nigel Crossley, who resigned as Director on 5 March 2026 after 11 years with the company (source: Companies House; Serco Group plc announcement).
• Keith Williams became Board Chair from 1 January 2026, having joined the Board as a Non-Executive Director on 1 August 2025, succeeding John Rishton, who stepped down as Chair on 31 December 2025 after nine years on the board (source: Companies House; Serco Group plc announcement).
• Amanda Miller appointed Company Secretary, 1 October 2025, succeeding Nickesha Graham-Burrell, who resigned the same date (source: Companies House).

Data availability

Classification: Full. Companies House publishes current and historical officer appointment and resignation dates together with nationality and country of residence for SERCO GROUP PLC’s directors and secretary; occupation, as distinct from legal role, and residential addresses are not separately reported. Given the high number of historical appointments (47 resignations on record), this overview covers only the current board and the most recent changes rather than the full appointment history.

Sources

• Companies House – Officers list, company number 02048608
• Serco Group plc – “Mark Reid appointed as Group CFO; Nigel Crossley to retire,” serco.com, 2025
• Serco Group plc – “Serco appoints Keith Williams as Board Chair,” regulatory announcement, 2025
• Serco Group plc – “Mark Irwin to retire; Anthony Kirby appointed Group Chief Executive designate,” serco.com, 2025

Group structure of SERCO GROUP PLC

SERCO GROUP PLC is the ultimate parent company of the Serco Group and is not controlled by any other corporate parent; it has been exempt from the UK persons-with-significant-control regime since 11 March 2018 because its shares are admitted to trading on a UK regulated market, and its shareholding is dispersed among institutional investors, none of whom is known to control 25% or more of its voting rights. Two direct UK subsidiaries have been independently verified as active on the Companies House register during this research: SERCO LIMITED (company number 00242246), the Group’s principal UK operating company, incorporated 10 September 1929 (formerly R.C.A. Limited), and SERCO HOLDINGS LIMITED (company number 03970268), an intermediate UK holding company, incorporated 11 April 2000. Serco’s own reported corporate-linkage records additionally list a wide international structure of operating subsidiaries spanning Australia, the United States, continental Europe, the Middle East and elsewhere, including Serco Inc. (Virginia, USA) and Serco Group Pty Limited (Australia), reflecting the Group’s operations in defence, justice, transport, health and citizen services outside the UK; these entities were not individually re-verified against their home-country registries during this research. Group information reviewed 22 September 2026.

Verified corporate relationships

Recent structural changes

• Serco Inc., a US subsidiary, announced an agreement in January 2025 to acquire Northrop Grumman’s Mission Training and Satellite ground network communications software business for $327 million, expected to add around 1,000 employees to the Group’s US defence operations (source: Serco Group plc announcement, 30 January 2025).

Data availability

Classification: Partial. SERCO GROUP PLC’s status as an independent, exchange-listed ultimate parent is confirmed via Companies House, and two UK subsidiaries (Serco Limited and Serco Holdings Limited) are independently verified as active. The wider international group structure reflects Serco’s own reported corporate-linkage data rather than entity-by-entity verification against each jurisdiction’s registry in this research, and ownership percentages within the group are not disclosed in the sources reviewed.

Sources

• Companies House – Company overview, company numbers 02048608, 00242246 and 03970268
• Companies House – Persons with Significant Control register, company number 02048608
• Serco Group plc – “Serco Announces Intent to Acquire Northrop Grumman’s Mission Training and Satellite Ground Network Communications Software Business,” 30 January 2025, serco.com / globenewswire.com