Boskalis Sustainability Report 2020

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CO2 DATA The CO 2 data covers all fuel consumed by vessels of the Dredging & Inland Infra and Offshore Energy divisions. ISO and ISM standards are used for the conversion of fuel to CO 2 . The following ISO and ISM standards are used for the conversion of fuel to CO 2 : ‚ Conversion of MT of fuel to CO 2 takes place according to IMO Resolution MEPC.212(63), using the following conversion factor per MT of fuel: – MGO/MDO 3.206 MT CO 2 – HFO 3.114 MT CO 2 ‚ Conversion of m 3 of biofuel to CO 2 takes place according to DEFRA carbon emission factors, using the following conversions factor per MT of fuel: – Biofuel 0.1863 MT CO 2 The energy use and associated CO 2 emissions from our offices in the Netherlands are from renewable sources and are therefore excluded from the CO 2 data in this report. subcontractors that work under our supervision. Lost Time Injury (LTI) expresses the number of workplace accidents serious enough to result in absence from work. Lost Time Injury Frequency (LTIF) expresses the number of workplace accidents resulting in absence from work per 200,000 hours worked. The LTIF overview on page 97 shows a breakdown for the various divisions. In addition to LTIF, we also provide the Total Recordable Injury Rate (TRIR). TRIR is composed of LTIs, Medical Treatment Cases and Restricted Work Cases, per 200,000 hours worked. SUPPLY CHAIN DATA The supply chain data refers to the procurement spend by the strategic suppliers of the Central Procurement department. 212 of these suppliers are regarded as strategic partners who account for some 90% of the Corporate Procurement department’s purchasing volume. REVENUE PER PRIORITY SDG For revenue mapping to the SDG’s, each project is assigned a pre-determined sustainability tag. A project can only have one Sustainability tag. Even if a project contributes to multiple SDG sub targets, there is no disaggregation of revenue within a project to multiple tags; the largest revenue share determines which tag is applicable to any given project. There is one exception: SDG 8 Decent Work and Economic Growth. In principle, all projects contribute to this overarching SDG. Per SDG, the following types of projects are presumed to contribute to the SDG goals: SAFETY DATA Our safety data covers all our own employees including

‚ SDG 7 - Affordable and Clean Energy: Includes all projects and services primarily related to energy transition including renewables, (natural) gas, and all decommissioning related activities; ‚ SDG 9 - Industry, Innovation and Infrastructure: Includes all projects and services primarily to the maintenance and/or development of maritime infrastructure such as ports, land reclamation, inland infra such as road related developments; ‚ SDG 13 - Climate Action: Includes all projects and services primarily related to adaptive measures against climate change such as protection of land from flooding, development of polders and dike related activities; ‚ SDG 14 - Life Below Water: Includes all projects and services primarily related to the salvaging of vessels; ‚ SDG 8 - Decent Work and Economic Growth: In principle, all projects contribute to SDG 8. PUBLICATION DATE The Sustainability Report 2020 was published at the same time as the Annual Report 2020 on 4 March 2021 on the corporate website. CONTACT Any suggestions you may have for improving our sustainability policy or the way we report on it are greatly appreciated. We are happy to engage with you on this subject, in which case you are kindly requested to contact:

Claire Bryant Sustainability Manager Telephone: +31 78 6969310 Email: csr@boskalis.com Website: www.boskalis.com/sustainabilityreport

SUSTAINABILITY REPORT 2020 – BOSKALIS