Press release

Paris, 2026, May 5th

DESCRIPTION OF THE SHARE REPURCHASE PROGRAM

1) Result of the previous plan

Declaration of the operations realized on treasury shares from 2025, May 6th, until 2026 May 5th, (covering the period which starting on the day following the assessment of the previous program was established and ending on 2026, May 5th):

Amounted gross flow (3)

2) Allocation by objectives of shares owned the day of the publication of the hereby document:

Number of treasury shares owned directly and indirectly: 244,120 representing 1.23 % of the company capital.

Number of shares owned by objective:

• Animation of the stock through a liquidity contract AMAFI: 0
• External growth operations: 0
• Covering option plan for stock or other employees ‘shareholding system: 244,120
• Coverage of securities giving right to share attribution: 0
• Cancellation: 0

3) New share repurchase program:

• Program Authority: Shareholders ‘Meeting on May 5th, 2026
• Securities covered: Ordinary shares
• Maximum proportion of the share capital authorised for buyback: 10 % currently equivalent to 1,986,202 shares. Considering the number of shares already held and amounting to 244,120 (1.23 % of the share capital), the maximum number of additional shares that can be bought will be 1,742,082 shares (8.77 % of the share capital) unless the Company sells or cancels the shares already held.
• Maximum purchase price: €50
• Objectives in decreasing order of priority:
  • Stimulate the market or the liquidity of the Company’s shares through an investment service provider under a liquidity agreement that complies with the AMAFI Ethics Charter recognized by the AMF,
  • Acquire shares to be held and subsequently delivered in payment or exchanged as part of corporate acquisition transactions,
  • Award or transfer stock to employees and/or corporate officers (on the terms and in the manner provided for by law) in particular as part of a stock option plan, a bonus share award plan or a company savings plan,
  • Award stock by the delivery of shares when exercising the rights attached to securities giving the right via redemption, conversion, exchange or presentation of a warrant, or in any other way, to an allocation of the Company’s stock,
  • Potentially cancel the shares acquired, under the conditions of the authorization granted by the Shareholder’s Meeting.
• Program duration: 18 months as from the Shareholders ‘Meeting of May 5th, 2026, until November the 5th, 2027.

This press release is available at www.kaufmanbroad.fr

Contacts

Chief Financial Officer
Bruno Coche -01 41 43 44 73/infos-invest@ketb.com

Press relations
Primatice : Thomas de Climens -06 78 12 97 95/thomasdeclimens@primatice.fr
Kaufman & Broad : Emmeline Cacitti -06 72 42 66 24/ecacitti@ketb.com

About KAUFMAN & BROAD

As a developer and urban planner, the Kaufman & Broad group works alongside and serves local authorities and its customers. Through its various subsidiaries, the group offers comprehensive expertise and 55 years of experience in the construction of apartment buildings, detached houses, managed housing (for students and seniors), commercial premises, logistics platforms, and office buildings.

The group’s employees hold and share the belief that Building is action! Acting for people by promoting health and community living, acting for the city by contributing to its attractiveness and development, and acting for the planet by reducing the daily carbon footprint of building construction and use.

All the operations developed by the group thus make a positive contribution to the ecological transition and innovate to create a more virtuous city.

For more information: www.corporate.kaufmanbroad.fr

The Universal Registration Document of Kaufman & Broad was filed on March 27, 2026 with the Autorité des marchés financiers ( the “ AMF”) under number D.26-0156. It is available on the websites of the AMF (www.amf-france.org) and Kaufman & Broad (www.kaufmanbroad.fr). It contains a detailed description of Kaufman & Broad's business, results and outlook as well as the associated risk factors. Kaufman & Broad draws particular attention to the risk factors described in section 4 of the Universal Registration Document. The occurrence of one or more of these risks could have a material adverse effect on the activities, assets, financial position, results or outlook of the Kaufman & Broad group, as well as on the market price of Kaufman & Broad shares.

This press release does not constitute and should not be considered as constituting a public offer, a sales offer or a subscription offer as intended to solicit a purchase or subscription order in any country

Notes

1. On May 5th, 2026 (market close on May 4th, 2026)
2. In the last 24 months prior to May 4th, 2026
3. Covering the period which starting on the day following the assessment of the previous program was established and ending on May 4th,2026. It concerns transaction made as part of block transactions or liquidity contract.