Document

Capitalised terms used in this opinion letter have the meanings set forth in Exhibit A to this opinion letter. The section headings used in this opinion letter are for convenience of reference only and are not to affect its construction or to be taken into consideration in its interpretation.

This opinion letter is strictly limited to the matters stated in it and may not be read as extending by implication to any matters not specifically referred to in it. Nothing in this opinion letter should be taken as expressing an opinion in respect of any representations or warranties, or other information, contained in any document reviewed by us in connection with this opinion letter.

In rendering the opinions expressed in this opinion letter, we have reviewed and relied upon a draft of the Plan, a draft of the Registration Statement and pdf copies of the Corporate Documents and we have assumed that Awards under the Plan shall be made for bona fide commercial reasons. We have not investigated or verified any factual matter disclosed to us in the course of our review.

This opinion letter sets out our opinion on certain matters of the laws with general applicability of the Netherlands, and, insofar as they are directly applicable in the Netherlands, of the European Union, as at today's date and as presently interpreted under published authoritative case law of the Dutch courts, the General Court and the Court of Justice of the European Union. We do not express any opinion on Dutch or European competition law, data protection law, tax law, securitisation law or regulatory law. No undertaking is assumed on our part to revise, update or amend this opinion letter in connection with, or to notify or inform you of, any developments and/or changes of Dutch law subsequent to today's date. We do not purport to opine on the consequences of amendments to the Plan, the Registration Statement or the Corporate Documents subsequent to the date of this opinion letter.

The opinions expressed in this opinion letter are to be construed and interpreted in accordance with Dutch law. The competent courts at Amsterdam, the Netherlands, have exclusive jurisdiction to settle any issues of interpretation or liability arising out of or in connection with this opinion letter. Any legal

All legal relationships are subject to NautaDutilh N.V.'s general terms and conditions (see https://www.nautadutilh.com/terms), which apply mutatis mutandis to our relationship with third parties relying on statements of NautaDutilh N.V., include a limitation of liability clause, have been filed with the Rotterdam District Court and will be provided free of charge upon request. NautaDutilh N.V.; corporate seat Rotterdam; trade register no. 24338323.

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relationship arising out of or in connection with this opinion letter (whether contractual or non-contractual), including the above submission to jurisdiction, is governed by Dutch law and shall be subject to the general terms and conditions of NautaDutilh. Any liability arising out of or in connection with this opinion letter shall be limited to the amount which is paid out under NautaDutilh's insurance policy in the matter concerned. No person other than NautaDutilh may be held liable in connection with this opinion letter.

In this opinion letter, legal concepts are expressed in English terms. The Dutch legal concepts concerned may not be identical in meaning to the concepts described by the English terms as they exist under the law of other jurisdictions. In the event of a conflict or inconsistency, the relevant expression shall be deemed to refer only to the Dutch legal concepts described by the English terms.

b.if any signature under any document is an electronic signature (as opposed to a handwritten ("wet ink") signature) only, it is either a qualified electronic signature within the meaning of the eIDAS Regulation, or the method used for signing is otherwise sufficiently reliable;

e.at each Relevant Moment, (i) Class A Shares shall have been admitted for trading on a trading system outside the European Economic Area comparable to a regulated market or a multilateral trading facility as referred to in Section 2:86c(1) DCC and (ii) no financial instruments issued by the Company (or depository receipts for or otherwise representing such financial instruments) have been admitted to trading on a regulated market, multilateral trading facility or organised trading facility operating in the European Economic Area (and no request for

h.at each Relevant Moment, the Company will not have (i) been dissolved (ontbonden), (ii) ceased to exist pursuant to a merger (fusie) or a division (splitsing), (iii) been converted (omgezet) into another legal form, either national or foreign, (iv) had its assets placed under administration (onder bewind gesteld), (v) been declared bankrupt (failliet verklaard), (vi) been granted a suspension of payments (surseance van betaling verleend), (vii) started or become subject to statutory proceedings for the restructuring of its debts (akkoordprocedure) or (viii) been made subject to similar proceedings in any jurisdiction or otherwise been limited in its power to dispose of its assets;

j.at each Relevant Moment, the relevant Award(s) (i) shall have been validly granted as a right to subscribe for Class A Shares (recht tot het nemen van aandelen) by the corporate body authorised to do so, (ii) shall be in full force and effect upon being exercised or settled, as applicable, (iii) shall have been validly exercised or settled, as applicable, in accordance with the terms and conditions applicable to such Award(s) and (iv) any pre-emption rights in respect of such Award(s) shall have been validly excluded by the corporate body authorised to do so; and

k.at each Relevant Moment, each holder of the relevant Award(s) shall be an individual who has not (i) deceased, (ii) had such individual's assets placed under administration (onder bewind gesteld), (iii) been declared bankrupt (failliet verklaard), (iv) been granted a suspension of payments (surseance van betaling verleend), (v) been subjected to a debt reorganisation procedure (schuldsanering), (vi) started or become subject

2.Subject to receipt by the Company of payment in full for, or other satisfaction of the issue price of, the Plan Shares in accordance with the Plan, and when issued by the Company and accepted by the acquiror(s) thereof, in accordance with the Plan, the Plan Shares shall be validly issued, fully paid and non-assessable.

A.Opinion 1 must not be read to imply that the Company cannot be dissolved (ontbonden). A company such as the Company may be dissolved, inter alia by the competent court at the request of the company's board of directors, any interested party (belanghebbende) or the public prosecution office in certain circumstances, such as when there are certain defects in the incorporation of the company. Any such dissolution will not have retro-active effect.

B.Pursuant to Section 2:7 DCC, any transaction entered into by a legal entity may be nullified by the legal entity itself or its liquidator in bankruptcy proceedings (curator) if the objects of that entity were transgressed by the transaction and the other party to the transaction knew or should have known this without independent investigation (wist of zonder eigen onderzoek moest weten). The Dutch Supreme Court (Hoge Raad der Nederlanden) has ruled that in determining whether the objects of a legal entity are transgressed, not only the description of the objects in

that legal entity's articles of association (statuten) is decisive, but all (relevant) circumstances must be taken into account, in particular whether the interests of the legal entity were served by the transaction. Based on the objects clause contained in the Current Articles, we have no reason to believe that, by making Awards under the Plan, the Company would transgress the description of the objects contained in its Articles of Association. However, we cannot assess whether there are other relevant circumstances that must be taken into account, in particular whether the interests of the Company are served by making Awards under the Plan since this is a matter of fact.

C.Pursuant to Section 2:98c DCC, a company such as the Company may grant loans (leningen verstrekken) only in accordance with the restrictions set out in Section 2:98c DCC, and may not provide security (zekerheid stellen), give a price guarantee (koersgarantie geven) or otherwise bind itself, whether jointly and severally or otherwise with or for third parties (zich op andere wijze sterk maken of zich hoofdelijk of anderszins naast of voor anderen verbinden) with a view to (met het oog op) the subscription or acquisition by third parties of shares in its share capital or depository receipts. This prohibition also applies to its subsidiaries (dochtervennootschappen). It is generally assumed that a transaction entered into in violation of Section 2:98c DCC is null and void (nietig). Based on the content of the Plan, we have no reason to believe that the Company or its subsidiaries will violate Section 2:98c DCC in connection with the issue of Plan Shares. However, we cannot confirm this definitively, since the determination of whether a company (or a subsidiary) has provided security, has given a price guarantee or has otherwise bound itself, with a view to the subscription or acquisition by third parties of shares in its share capital or depository receipts, as described above, is a matter of fact.

g.the rules of force majeure (niet toerekenbare tekortkoming), reasonableness and fairness (redelijkheid en billijkheid), suspension (opschorting), dissolution (ontbinding), unforeseen circumstances (onvoorziene omstandigheden) and vitiated consent (i.e., duress (bedreiging), fraud (bedrog), abuse of circumstances (misbruik van omstandigheden) and error (dwaling)) or a difference of intention (wil) and declaration (verklaring).

E.The term "non-assessable" has no equivalent in the Dutch language and for purposes of this opinion letter such term should be interpreted to mean that a holder of a Class A Share shall not by reason of merely being such a holder be subject to assessment or calls by the Company or its creditors for further payment on such Class A Share.


"Anti Money Laundering Laws"			The European Anti-Money Laundering Directives, as implemented in the Netherlands in the Money Laundering and Terrorist Financing Prevention Act (Wet ter voorkoming van witwassen en financieren van terrorisme) and the Dutch Criminal Code (Wetboek van Strafrecht).
"Anti-Boycott Regulation"			The Council Regulation (EC) No 2271/96 of 22 November 1996 on protecting against the effects of the extra-territorial application of legislation adopted by a third country, and actions based thereon or resulting therefrom.
"Articles of Association"			The Company's articles of association (statuten) as they read from time to time.
"Awards"			Rights to subscribe for Class A Shares granted pursuant to the terms and conditions of the Plan.
"Bankruptcy Code"			The Dutch Bankruptcy Code (Faillissementswet).
"Class A Shares"			Class A shares in the Company's capital, with a nominal value of EUR 0.06 each.
"Commercial Register"			The Dutch Commercial Register (handelsregister).


"Company"			trivago N.V., a public company with limited liability (naamloze vennootschap), registered with the Commercial Register under number 67222927.
"Corporate Documents"			The Deed of Incorporation, the Deed of Conversion, the Current Articles and the Extract.
"Current Articles"			The Articles of Association as they read immediately after the execution of a deed of amendment dated 20 October 2023, following which, according to the Extract, no amendment to the Articles of Association was effected.
"DCC"			The Dutch Civil Code (Burgerlijk Wetboek).
"Deed of Conversion"			The deed of conversion and amendment to the Articles of Association dated 16 December 2016 (at which time the Company was named travel B.V.).
"Deed of Incorporation"			The deed of incorporation (akte van oprichting) of the Company (at that time named travel B.V.) dated 7 November 2016.
"eIDAS Regulation"			Regulation (EU) No 910/2014 of the European Parliament and of the Council of 23 July 2014 on electronic identification and trust services for electronic transactions in the internal market and repealing Directive 1999/93/EC.


"Extract"			An extract from the Commercial Register relating to the Company, dated the date of this opinion letter.
"Insolvency Proceedings"			Any insolvency proceedings within the meaning of Regulation (EU) 2015/848 of the European Parliament and of the Council of 20 May 2015 on insolvency proceedings (recast), as amended by Regulation (EU) 2021/2260 of the European Parliament and of the Counsel of 15 December 2021, listed in Annex A thereto and any statutory proceedings for the restructuring of debts (akkoordprocedure) pursuant to the Bankruptcy Code.
"NautaDutilh"			NautaDutilh N.V.
"the Netherlands"			The European territory of the Kingdom of the Netherlands and "Dutch" is in or from the Netherlands.
"Plan"			The trivago N.V. Amended and Restated 2016 Omnibus Incentive Plan of the Company in the form attached as exhibit 4.2 to the Registration Statement.
"Plan Shares"			20,526,250 Class A Shares available for issuance under the Plan.
"Prospectus Regulation"			Regulation (EU) 2017/1129 of the European Parliament and of the Council of 14 June 2017 on the prospectus to be published when securities are offered to the public or admitted to trading on a regulated market, and repealing Directive 2003/71/EC.
"Registration Statement"			The Company's registration statement on Form S-8 filed or to be filed with the SEC in the form reviewed by us.


"Relevant Moment"			Each time when one or more Awards are granted or one or more Plan Shares are issued pursuant to the exercise or settlement of the relevant Award(s).
"SEC"			The United States Securities and Exchange Commission.


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