Report of the statutory auditor

Statutory auditor’s report to the shareholders’ meeting of Galapagos NV for the year ended 31 December 2021 – Consolidated financial statements

The original text of this report is in Dutch

In the context of the statutory audit of the consolidated financial statements of Galapagos NV (“the company”) and its subsidiaries (jointly “the group”), we hereby submit our statutory audit report. This report includes our report on the consolidated financial statements and the other legal and regulatory requirements. These parts should be considered as integral to the report.

We were appointed in our capacity as statutory auditor by the shareholders’ meeting of 28 April 2020, in accordance with the proposal of the board of directors, now supervisory board (“bestuursorgaan” / “organe d’administration”) issued upon recommendation of the audit committee. Our mandate will expire on the date of the shareholders’ meeting deliberating on the financial statements for the year ending 31 December 2022. We have performed the statutory audit of the consolidated financial statements of Galapagos NV for 16 consecutive periods. We are the statutory auditor of Galapagos NV for 22 consecutive years.

Report on the consolidated financial statements

Unqualified opinion

We have audited the consolidated financial statements of the group, which comprise the consolidated statement of financial position as at 31 December 2021, the consolidated statement of income and comprehensive income/loss, the consolidated statement of changes in equity and the consolidated cash flow statement for the year then ended, as well as the summary of significant accounting policies and other explanatory notes. The consolidated statement of financial position shows total assets of 5 193 160 (000) EUR and the consolidated statement of income and comprehensive income/loss shows a loss for the year then ended of 103 231 (000) EUR.

In our opinion, the consolidated financial statements give a true and fair view of the group’s net equity and financial position as of 31 December 2021 and of its consolidated results and its consolidated cash flow for the year then ended, in accordance with International Financial Reporting Standards (IFRS) as adopted by the European Union and with the legal and regulatory requirements applicable in Belgium.

Basis for the unqualified opinion

We conducted our audit in accordance with International Standards on Auditing (ISA), as applicable in Belgium. In addition, we have applied the International Standards on Auditing approved by the IAASB applicable to the current financial year, but not yet approved at national level. Our responsibilities under those standards are further described in the “Responsibilities of the statutory auditor for the audit of the consolidated financial statements” section of our report. We have complied with all ethical requirements relevant to the statutory audit of consolidated financial statements in Belgium, including those regarding independence.

We have obtained from the supervisory board and the company’s officials the explanations and information necessary for performing our audit.

We believe that the audit evidence obtained is sufficient and appropriate to provide a basis for our opinion.

Key audit matters

Key audit matters are those matters that, in our professional judgment, were of most significance in our audit of the consolidated financial statements of the current period. These matters were addressed in the context of our audit of the consolidated financial statements as a whole and in forming our opinion thereon, and we do not provide a separate opinion on these matters.

Determination of the estimated costs impacting the percentage of completion used for revenue recognition related to the license and collaboration agreement for filgotinib – Refer to Notes 2, 4, 6, and 25 to the consolidated financial statements

Key Audit Matter Description

As described in notes 2, 4, 6 and 25 to the consolidated financial statements, the company recognized collaboration revenues of 235,7 million EUR in 2021 from upfront payments and milestone payments in relation to the Gilead collaboration agreement for filgotinib (the “agreement”). For this filgotinib performance obligation, the company recognized revenue using the cost-to-cost input method, which management believes best depicts the transfer of control to the customer, being Gilead. Under the cost-to-cost input method, the extent of progress towards completion is measured based on the ratio of actual costs incurred to the total estimated costs expected upon satisfying the filgotinib performance obligation.

Significant management judgment is required in determining the total estimated costs required under the agreement and the period over which the company is expected to complete its performance obligation. This significant estimate is the principal consideration for our conclusion that procedures relating to the determination of the estimated costs to complete the performance obligation, impacting the revenue recognition of the filgotinib performance obligation is a key audit matter. This increased level of judgment by management led to a high degree of auditor judgment, complexity, and effort in performing procedures and in evaluating audit evidence related to management’s assumptions related to the estimation of total costs to complete.

How the Key Audit Matter Was Addressed in the Audit

Our procedures included testing the effectiveness of controls relating to the revenue recognition process, including controls over the actual costs incurred to date and controls over the inputs and assumptions used to estimate the total costs required to complete the performance obligation, as well as increasing the nature and extent of our audit procedures where such controls were not operating effectively.

These procedures included, among others (i) evaluating and testing management’s process for determining the estimate of total costs to complete the performance obligation, which included evaluating the reasonableness of significant assumptions related to the estimate, and (ii) testing, on a sample basis, the actual costs incurred to date.

Our procedures on the reasonableness of the assumptions used also included evaluating management’s ability to reasonably estimate costs to complete the performance obligation by (i) evaluating the appropriateness of changes made during the period to management’s estimates of total costs to complete; (ii) performing a comparison of management’s prior period cost estimates to actual costs incurred and approved; (iii) evaluating the period over which management is expecting the company to complete its performance obligation; (iv) comparing certain costs to third-party supporting evidence, and (v) performing sensitivities on the current year’s revenue recognition resulting from changes to these estimates.

Responsibilities of the supervisory board for the preparation of the consolidated financial statements

The supervisory board is responsible for the preparation and fair presentation of the consolidated financial statements in accordance with International Financial Reporting Standards (IFRS) as adopted by the European Union and with the legal and regulatory requirements applicable in Belgium and for such internal control as the supervisory board determines is necessary to enable the preparation of consolidated financial statements that are free from material misstatement, whether due to fraud or error.

In preparing the consolidated financial statements, the supervisory board is responsible for assessing the group’s ability to continue as a going concern, disclosing, as applicable, matters to be considered for going concern and using the going concern basis of accounting unless the supervisory board either intends to liquidate the group or to cease operations, or has no other realistic alternative but to do so.

Responsibilities of the statutory auditor for the audit of the consolidated financial statements

Our objectives are to obtain reasonable assurance about whether the consolidated financial statements as a whole are free from material misstatement, whether due to fraud or error, and to issue a statutory auditor’s report that includes our opinion. Reasonable assurance is a high level of assurance, but is not a guarantee that an audit conducted in accordance with ISA will always detect a material misstatement when it exists. Misstatements can arise from fraud or error and are considered material if, individually or in the aggregate, they could reasonably be expected to influence the economic decisions of users taken on the basis of these consolidated financial statements.

During the performance of our audit, we comply with the legal, regulatory and normative framework as applicable to the audit of consolidated financial statements in Belgium. The scope of the audit does not comprise any assurance regarding the future viability of the company nor regarding the efficiency or effectiveness demonstrated by the supervisory board in the way that the company’s business has been conducted or will be conducted.

As part of an audit in accordance with ISA, we exercise professional judgment and maintain professional skepticism throughout the audit. We also:

• identify and assess the risks of material misstatement of the consolidated financial statements, whether due to fraud or error, design and perform audit procedures responsive to those risks, and obtain audit evidence that is sufficient and appropriate to provide a basis for our opinion. The risk of not detecting a material misstatement resulting from fraud is higher than for one resulting from an error, as fraud may involve collusion, forgery, intentional omissions, misrepresentations, or the override of internal control;
• obtain an understanding of internal control relevant to the audit in order to design audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the group’s internal control;
• evaluate the appropriateness of accounting policies used and the reasonableness of accounting estimates and related disclosures made by the supervisory board;
• conclude on the appropriateness of the use of the going concern basis of accounting by the supervisory board and, based on the audit evidence obtained, whether a material uncertainty exists related to events or conditions that may cast significant doubt on the group’s ability to continue as a going concern. If we conclude that a material uncertainty exists, we are required to draw attention in our statutory auditor’s report to the related disclosures in the consolidated financial statements or, if such disclosures are inadequate, to modify our opinion. Our conclusions are based on the audit evidence obtained up to the date of our statutory auditor’s report. However, future events or conditions may cause the group to cease to continue as a going concern;
• evaluate the overall presentation, structure and content of the consolidated financial statements, and whether the consolidated financial statements represent the underlying transactions and events in a manner that achieves fair presentation.
• obtain sufficient appropriate audit evidence regarding the financial information of the entities and business activities within the group to express an opinion on the consolidated financial statements. We are responsible for the direction, supervision and performance of the group audit. We remain solely responsible for our audit opinion.

We communicate with the audit committee regarding, amongst other matters, the planned scope and timing of the audit and significant audit findings, including any significant deficiencies in internal control that we identify during our audit.

We also provide the audit committee with a statement that we have complied with relevant ethical requirements regarding independence, and we communicate with them about all relationships and other matters that may reasonably be thought to bear on our independence, and where applicable, related safeguards.

From the matters communicated to the audit committee, we determine those matters that were of most significance in the audit of the consolidated financial statements of the current period and are therefore the key audit matters. We describe these matters in our report unless law or regulation precludes any public disclosure about the matter.

Other legal and regulatory requirements

Responsibilities of the supervisory board

The supervisory board is responsible for the preparation and the content of the directors’ report on the consolidated financial statements, the statement of non-financial information attached to the directors’ report on the consolidated financial statements and other matters disclosed in the annual report on the consolidated financial statements.

Responsibilities of the statutory auditor

As part of our mandate and in accordance with the Belgian standard complementary to the International Standards on Auditing (ISA) as applicable in Belgium, our responsibility is to verify, in all material respects, the director’s report on the consolidated financial statements, the statement of non-financial information attached to the directors’ report on the consolidated financial statements and other matters disclosed in the annual report on the consolidated financial statements, as well as to report on these matters.

Aspects regarding the directors’ report on the consolidated financial statements and other information disclosed in the annual report on the consolidated financial statements

In our opinion, after performing the specific procedures on the directors’ report on the consolidated financial statements, this report is consistent with the consolidated financial statements for that same year and has been established in accordance with the requirements of article 3:32 of the Code of companies and associations.

In the context of our statutory audit of the consolidated financial statements we are responsible to consider, in particular based on information that we became aware of during the audit, if the directors’ report on the consolidated financial statements and other information disclosed in the annual report on the consolidated financial statements, are free of material misstatements, either by information that is incorrectly stated or otherwise misleading. In the context of the procedures performed, we are not aware of such a material misstatement.

The non-financial information as required by article 3:32, § 2 of the Code of companies and associations, has been disclosed in the directors’ report on the consolidated financial statements that is part of the section on corporate social responsibility of the annual report (section “CSR Report”). This non-financial information has been established by the company in accordance with the United Nations’ Sustainable Development Goals (“SDG’s”). In accordance with article 3:80 § 1, 5° of the Code of companies and associations we do not express any opinion on the question whether this non-financial information has been established in accordance with these SDG’s.

Statements regarding independence

• Our audit firm and our network have not performed any prohibited services and our audit firm has remained independent from the group during the performance of our mandate.
• The fees for the additional non-audit services compatible with the statutory audit, as defined in article 3:65 of the Code of companies and associations, have been properly disclosed and disaggregated in the notes to the consolidated financial statements.

Single European Electronic Format (ESEF)

In accordance with the draft standard on the audit of the compliance of the financial statements with the Single European Electronic Format (“ESEF”), we have also performed the audit of the compliance of the ESEF format and of the tagging with the technical regulatory standards as defined by the European Delegated Regulation No. 2019/815 of 17 December 2018 (“Delegated Regulation”).

The supervisory board is responsible for the preparation, in accordance with the ESEF requirements, of the consolidated financial statements in the form of an electronic file in ESEF format (“digital consolidated financial statements”) included in the annual financial report.

Our responsibility is to obtain sufficient and appropriate evidence to conclude that the format and the tagging of the digital consolidated financial statements comply, in all material respects, with the ESEF requirements as stipulated by the Delegated Regulation.

Based on our work, in our opinion, the format and the tagging of information in the official Dutch version of the digital consolidated financial statements included in the annual financial report of Galapagos NV as of 31 December 2021 are, in all material respects, prepared in accordance with the ESEF requirements as stipulated by the Delegated Regulation.

Other statements

• This report is consistent with our additional report to the audit committee referred to in article 11 of Regulation (EU) No 537/2014.

Signed at Zaventem, March 24, 2022.
The statutory auditor

Deloitte Bedrijfsrevisoren/Réviseurs d’Entreprises BV/SRL
Represented by Nico Houthaeve