6-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Report on Form 6-K dated July 1, 2019

(Commission File No. 001-35053)

INTERXION HOLDING N.V.

(Translation of Registrant’s Name into English)

Scorpius 30, 2132 LR Hoofddorp, The Netherlands, +31 20 880 7600

(Address of Principal Executive Office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F  ☒             Form 40-F  ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):  ☐

Note: Regulation S-T Rule 101(b)(1) only permits the submission in paper of a Form 6-K if submitted solely to provide an attached annual report to security holders.

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):  ☐

Note: Regulation S-T Rule 101(b)(7) only permits the submission in paper of a Form 6-K if submitted to furnish a report or other document that the registrant foreign private issuer must furnish and make public under the laws of the jurisdiction in which the registrant is incorporated, domiciled or legally organized (the registrant’s “home country”), or under the rules of the home country exchange on which the registrant’s securities are traded, as long as the report or other document is not a press release, is not required to be and has not been distributed to the registrant’s security holders, and, if discussing a material event, has already been the subject of a Form 6-K submission or other Commission filing on EDGAR.

INFORMATION CONTAINED IN THIS FORM 6-K REPORT

Attached hereto as Exhibit 1.1 is the Underwriting Agreement (the “Underwriting Agreement”), dated as of June 26, 2019, by and among InterXion Holding N.V. (the “Company”), Citigroup Global Markets Inc., Barclays Capital Inc., BofA Securities, Inc. and Guggenheim Securities, LLC, as representatives of the several underwriters named therein, executed in connection with the previously announced underwritten public offering of 4,600,000 ordinary shares of the Company, including 600,000 ordinary shares sold to the underwriters pursuant to the underwriters’ option to purchase additional shares granted in the Underwriting Agreement, which the underwriters exercised on June 27, 2019 (the “Offering”).

Attached hereto as Exhibit 5.1 is the Opinion of Loyens & Loeff N.V., dated as of July 1, 2019, as to the validity of the ordinary shares issued in the Offering.

Attached hereto as Exhibit 99.1 is a copy of the press release of the Company, dated June 26, 2019, announcing the pricing of the Offering at $72.75 per ordinary share.

The Offering closed on July 1, 2019.

This Report on Form 6-K is incorporated by reference into (i) the Registration Statement on Form F-3 of the Company originally filed with the Securities and Exchange Commission (the “SEC”) on June 25, 2019 (File No. 333-232331); (ii) the Registration Statement on Form S-8 of the Company originally filed with the SEC on June 23, 2011 (File No. 333-175099); (iii) the Registration Statement on Form S-8 of the Company originally filed with the SEC on June 2, 2014 (File No. 333-196447) and (iv) the Registration Statement on Form S-8 of the Company originally filed with the SEC on May 31, 2017 (File No. 333-218364).

No.	Description
1.1	Underwriting Agreement, dated as of June 26, 2019, by and among InterXion Holding N.V., Citigroup Global Markets Inc., Barclays Capital Inc., BofA Securities, Inc. and Guggenheim Securities, LLC, as representatives of the several underwriters named therein, relating to the Offering.
5.1	Opinion of Loyens & Loeff N.V., dated as of July 1, 2019, relating to the validity of the ordinary shares issued in the Offering.
23.1	Consent of Loyens & Loeff N.V. (included in Exhibit 5.1).
99.1	Press Release issued by InterXion Holding N.V., dated as of June 26, 2019, relating to the Offering.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

INTERXION HOLDING N.V.
By:	/s/ David C. Ruberg
Name:	David C. Ruberg
Title:	Chief Executive Officer
By:	/s/ Jean Mandeville
Name:	Jean Mandeville
Title:	Chairman

Date: July 1, 2019

EX-1.1

Exhibit 1.1

INTERXION HOLDING N.V.

4,000,000 Ordinary Shares

Plus an option to purchase from the Company, up to 600,000 additional Ordinary Shares

Ordinary Shares

(nominal value €0.10 per share)

Underwriting Agreement

New York, New York

June 26, 2019

Citigroup Global Markets Inc.

Barclays Capital Inc.

BofA Securities, Inc.

Guggenheim Securities, LLC

As Representatives of the several Underwriters,

c/o Citigroup Global Markets Inc.

388 Greenwich Street

New York, New York 10013

Ladies and Gentlemen:

InterXion Holding N.V., a public limited liability company (naamloze vennootschap) incorporated under the laws of The Netherlands (the “Company”), proposes to sell to the several underwriters named in Schedule II hereto (the “Underwriters”), for whom you (the “Representatives”) are acting as representatives, the number of ordinary shares, with a nominal value of €0.10 per share (“Ordinary Shares”), of the Company set forth in Schedule I hereto (said shares to be issued and sold by the Company being hereinafter called the “Underwritten Securities”). The Company also proposes to grant to the Underwriters an option to purchase up to the number of additional Ordinary Shares set forth in Schedule I (the “Option Securities;” the Option Securities, together with the Underwritten Securities, being hereinafter called the “Securities”). To the extent there are no additional Underwriters listed on Schedule I other than you, the term Representatives as used herein shall mean you, as Underwriters, and the terms Representative and Underwriter shall mean either the singular or plural as the context requires. The use of the neuter in this underwriting agreement (this “Agreement”) shall include the feminine and masculine as the context requires.

As used in this Agreement, the “Registration Statement” means the registration statement referred to in paragraph 1(a) hereof, including the exhibits, schedules and financial statements and any prospectus supplement relating to the Securities that is filed with the Securities and Exchange Commission (the “SEC”) pursuant to Rule 424(b) under the Securities Act of 1933, as amended, and the rules and regulations promulgated thereunder (the “Securities

Act”) and deemed part of such registration statement pursuant to Rule 430B under the Securities Act, as amended on each Effective Date, and, in the event any post-effective amendment thereto becomes effective prior to the Closing Date (as defined in Section 3 hereof), shall also mean such registration statement as so amended; the “Effective Date” means each date and time that the Registration Statement, and any post-effective amendment or amendments thereto became or becomes effective; the “Base Prospectus” means the base prospectus referred to in paragraph 1(a) hereof contained in the Registration Statement at the date and time that this Agreement is executed and delivered by the parties hereto (the “Execution Time”); the “Preliminary Prospectus” means any preliminary prospectus supplement to the Base Prospectus referred to in paragraph 1(a) hereof which is used prior to the filing of the Final Prospectus, together with the Base Prospectus; and the “Final Prospectus” means the prospectus supplement relating to the Securities that is first filed pursuant to Rule 424(b) under the Securities Act after the Execution Time, together with the Base Prospectus.

Any reference herein to the Registration Statement, the Base Prospectus, any Preliminary Prospectus or the Final Prospectus shall be deemed to refer to and include the documents incorporated by reference therein pursuant to Item 6 of Form F-3 which were filed under the Securities Exchange Act of 1934, as amended, and the rules and regulations promulgated thereunder (the “Exchange Act”) on or before the Effective Date of the Registration Statement or the issue date of the Base Prospectus, any Preliminary Prospectus or the Final Prospectus, as the case may be; and any reference herein to the terms “amend,” “amendment” or “supplement” with respect to the Registration Statement, the Base Prospectus, any Preliminary Prospectus or the Final Prospectus shall be deemed to refer to and include the filing of any document under the Exchange Act after the Effective Date of the Registration Statement or the issue date of the Base Prospectus, any Preliminary Prospectus or the Final Prospectus, as the case may be, deemed to be incorporated therein by reference.

As used in this Agreement, the “Disclosure Package” shall mean (i) the Base Prospectus, (ii) the Preliminary Prospectus used most recently prior to the Execution Time, (iii) any issuer free writing prospectus, as defined in Rule 433 under the Securities Act (an “Issuer Free Writing Prospectus”), identified in Schedule III-A hereto, (iv) and the information included on Schedule III-B hereto (v) any other free writing prospectus, as defined in Rule 405 under the Securities Act (a “Free Writing Prospectus”), that the parties hereto shall hereafter expressly agree in writing to treat as part of the Disclosure Package.

1.    Representations and Warranties.

(i)    The Company represents and warrants to, and agrees with, each Underwriter as set forth below in this Section 1.

(a)    The Company meets the requirements for use of Form F-3 under the Securities Act and has prepared and filed with the SEC an automatic shelf registration statement, as defined in Rule 405 under the Securities Act (“Rule 405”) (the file number of which is set forth in Schedule I hereto) on Form F-3, including a related Base Prospectus, for the registration of the offering and sale of the Securities under the Securities Act. Such Registration Statement, including any amendments thereto filed prior to the Execution Time, became effective upon filing. The Company may have filed

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with the SEC, as part of an amendment to the Registration Statement or pursuant to Rule 424(b), a preliminary prospectus supplement relating to the Securities, which has previously been furnished to you. The Company will file with the SEC a final prospectus supplement relating to the Securities in accordance with Rule 424(b) after the Execution Time. As filed, such final prospectus supplement shall contain all information required to be contained therein by the Securities Act and the rules thereunder and, except to the extent the Representatives shall agree in writing to a modification, shall be in all substantive respects in the form furnished to you prior to the Execution Time or, to the extent not completed at the Execution Time, shall contain only such specific additional information and other changes (beyond that contained in the Disclosure Package) as the Company has advised you, prior to the Execution Time, will be included or made therein. The Registration Statement, at the Execution Time, meets the requirements set forth in Rule 415(a)(1)(x) under the Securities Act.

(b)    On each Effective Date, the Registration Statement did, and when the Final Prospectus is first filed in accordance with Rule 424(b) and on the Closing Date (as defined herein) and on any date on which Option Securities are purchased, if such date is not the Closing Date (a “settlement date”), the Final Prospectus (and any supplement thereto) will, comply in all material respects with the applicable requirements of the Securities Act and the Exchange Act and the respective rules thereunder; on each Effective Date, at the Execution Time and on the Closing Date, the Registration Statement did not and will not contain any untrue statement of a material fact or omit to state any material fact required to be stated therein or necessary in order to make the statements therein not misleading; and on the date of any filing pursuant to Rule 424(b) and on the Closing Date and any settlement date, the Final Prospectus (together with any supplement thereto) will not include any untrue statement of a material fact or omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided, however, that the Company makes no representations or warranties as to the information contained in or omitted from the Registration Statement or the Final Prospectus (or any supplement thereto) in reliance upon and in conformity with information furnished in writing to the Company by or on behalf of any Underwriter through the Representatives specifically for inclusion in the Registration Statement or the Final Prospectus (or any supplement thereto), it being understood and agreed that the only such information furnished by any Underwriter consists of the information described as such in Section 8 hereof.

(c)    (i) The Disclosure Package and (ii) each electronic road show, when taken together as a whole with the Disclosure Package, does not contain any untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading. The preceding sentence does not apply to statements in or omissions from the Disclosure Package based upon and in conformity with written information furnished to the Company by any Underwriter through the Representatives specifically for use therein, it being understood and agreed that the only such information furnished by or on behalf of any Underwriter consists of the information described as such in Section 8 hereof.

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(d)    (i) At the time of filing the Registration Statement, (ii) at the time of the most recent amendment thereto for the purposes of complying with Section 10(a)(3) of the Securities Act (whether such amendment was by post-effective amendment, incorporated report filed pursuant to Sections 13 or 15(d) of the Exchange Act or form of prospectus), (iii) at the time the Company or any person acting on its behalf (within the meaning, for this clause only, of Rule 163(c)) made any offer relating to the Securities in reliance on the exemption in Rule 163, and (iv) at the Execution Time (with such date being used as the determination date for purposes of this clause (iv)), the Company was or is (as the case may be) a “well-known seasoned issuer” as defined in Rule 405.

(e)    (i) At the earliest time after the filing of the Registration Statement that the Company or another offering participant made a bona fide offer (within the meaning of Rule 164(h)(2)) under the Securities and (ii) as of the Execution Time (with such date being used as the determination date for purposes of this clause (ii)), the Company was not and is not an Ineligible Issuer (as defined in Rule 405), without taking account of any determination by the SEC pursuant to Rule 405 that it is not necessary that the Company be considered an Ineligible Issuer.

(f)    Each Issuer Free Writing Prospectus does not include any information that conflicts with the information contained in the Registration Statement, including any document incorporated by reference therein and any prospectus supplement deemed to be a part thereof that has not been superseded or modified. The foregoing sentence does not apply to statements in or omissions from any Issuer Free Writing Prospectus based upon and in conformity with written information furnished to the Company by any Underwriter through the Representatives specifically for use therein, it being understood and agreed that the only such information furnished by or on behalf of any Underwriter consists of the information described as such in Section 8 hereof.

(g)    The interactive data in the eXtensible Business Reporting Language incorporated by reference in the Registration Statement fairly presents the information called for in all material respects and has been prepared in accordance with the SEC’s rules and guidelines applicable thereto.

(h)    Each of the Company and its subsidiaries has been duly incorporated, or formed, as the case may be, and is validly existing and is in good standing (if applicable under the laws of the relevant jurisdiction) under the laws of the jurisdiction in which it is chartered, incorporated or organized with full corporate or other organizational power and authority to own or lease, as the case may be, and to operate its properties and conduct its business as described in the Disclosure Package and the Final Prospectus, and is duly qualified to do business as a foreign corporation or other business entity and is in good standing under the laws of each jurisdiction that requires such qualification except where failure to be so qualified would not have or be reasonably likely to have a Material Adverse Effect (as defined below).

(i)    All the outstanding shares in the capital of the Company and other equity interests of each of the Company’s subsidiaries have been duly authorized and validly issued and are fully paid and non-assessable (if applicable under the laws of the

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relevant jurisdiction), and, except as otherwise set forth in the Disclosure Package and the Final Prospectus, all outstanding shares in the capital of the subsidiaries are owned by the Company either directly or through wholly owned subsidiaries free and clear of any security interest, claim, lien or encumbrance, other than any share transfer restrictions contained in the articles of association of the Company’s subsidiaries.

(j)    The statements in the Preliminary Prospectus and the Final Prospectus under the heading “Material Tax Consequences” fairly summarize the matters therein described.

(k)    This Agreement has been duly authorized, executed and delivered by the Company.

(l)    The Company is not and, after giving effect to the offering and sale of the Securities and the application of the proceeds thereof as described in the Disclosure Package and the Final Prospectus, will not be an “investment company” as defined in the Investment Company Act of 1940, as amended.

(m)    No consent, approval, authorization, filing with or order of any court or governmental agency or body is required in connection with the transactions contemplated herein, except such as have been obtained under the Securities Act and such as may be required under the blue sky laws of any jurisdiction in connection with the purchase and distribution of the Securities by the Underwriters in the manner contemplated herein and in the Disclosure Package and the Final Prospectus.

(n)    Neither the issue and sale of the Securities nor the consummation of any other of the transactions herein contemplated nor the fulfillment of the terms hereof will conflict with, result in a breach or violation of, or imposition of any lien, charge or encumbrance upon any property or assets of the Company or any of its subsidiaries pursuant to, (i) the charter or by-laws or comparable constituting documents of the Company or any of its subsidiaries, (ii) the terms of any indenture, contract, lease, mortgage, deed of trust, note agreement, loan agreement or other agreement, obligation, condition, covenant or instrument to which the Company or any of its subsidiaries is a party or bound or to which its or their property is subject, or (iii) any statute, law, rule, regulation, judgment, order or decree of any court, regulatory body, administrative agency, governmental body, arbitrator or other authority having jurisdiction over the Company or any of its subsidiaries or any of its or their properties, except where such conflict, breach, violation or imposition of any lien, charge or encumbrance would not have or be reasonably likely to have a Material Adverse Effect (as defined below).

(o)    No holders of securities of the Company have rights to the registration of such securities under the Registration Statement.

(p)    The consolidated historical financial statements of the Company and its consolidated subsidiaries incorporated by reference in the Preliminary Prospectus, the Final Prospectus and the Registration Statement present fairly the financial condition, results of operations and cash flows of the Company and its consolidated subsidiaries as

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of the dates and for the periods indicated, comply as to form in all material respects with the applicable accounting requirements of the Securities Act and have been prepared in conformity with International Financial Reporting Standards (“IFRS”) as issued by the Internal Accounting Standards Board (IASB) applied on a consistent basis throughout the periods involved (except as otherwise noted therein); the selected financial data set forth under the captions “Summary—Summary Financial and Other Information” and “Selected Financial Data” in the Preliminary Prospectus, the Final Prospectus and Registration Statement fairly present, on the basis stated in the Preliminary Prospectus, the Final Prospectus and the Registration Statement, the information included therein.

(q)    No action, suit or proceeding by or before any court or governmental agency, authority or body or any arbitrator involving the Company or any of its subsidiaries or its or their property is pending or, to the best knowledge of the Company, threatened that (i) would reasonably be expected to have a material adverse effect on the performance of this Agreement or the consummation of any of the transactions contemplated hereby or (ii) would reasonably be expected to have a material adverse effect on the financial condition, earnings, business or properties of the Company and its subsidiaries, taken as a whole, whether or not arising from transactions in the ordinary course of business (a “Material Adverse Effect”), except as set forth in or contemplated in the Disclosure Package and the Final Prospectus (exclusive of any amendment or supplement thereto).

(r)    Neither the Company nor any of its subsidiaries is in violation or default of (i) any provision of its articles of association, charter or bylaws or comparable constituting documents, (ii) the terms of any indenture, mortgage, deed of trust, loan agreement or other agreement, obligation, condition, covenant or instrument to which it is a party or bound or to which its property is subject, or (iii) any statute, law, rule, regulation, judgment, order or decree applicable to the Company or any of its subsidiaries of any court, regulatory body, administrative agency, governmental body, arbitrator or other authority having jurisdiction over the Company or such subsidiary or any of its properties, as applicable, except, with respect to (ii) and (iii), where any such violation or default would not have or be reasonably likely to have a Material Adverse Effect.

(s)    KPMG Accountants N.V., who have audited or reviewed certain financial statements of the Company and its consolidated subsidiaries and delivered their report with respect to the audited consolidated financial statements, and the notes thereto, incorporated by reference in the Disclosure Package and the Final Prospectus, are independent public accountants with respect to the Company within the meaning of the Securities Act and the applicable published rules and regulations thereunder.

(t)    There are no stamp or other issuance or transfer taxes or other similar fees or charges required to be paid by or on behalf of the Underwriters under the laws and regulations of The Netherlands in connection with the execution and delivery of this Agreement or the issuance by the Company of the Securities in the manner contemplated by this Agreement or sale by the Company of the Securities in the manner contemplated by this Agreement.

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(u)    Except as set forth in or contemplated in the Disclosure Package and the Final Prospectus (exclusive of any amendment or supplement thereto), the Company (i) has filed all tax returns that are required to be filed by it or has requested extensions thereof (except in any case in which the failure so to file would not have or be reasonably likely to have a Material Adverse Effect) and (ii) has paid all taxes required to be paid by it and any other assessment, fine or penalty levied against it, to the extent that any of the foregoing is due and payable, except for any such tax deficiency, assessment, fine or penalty that is currently being contested in good faith or the non-payment of which would not have or be reasonably likely to have a Material Adverse Effect.

(v)    No labor problem or dispute with the employees of the Company or any of its subsidiaries exists or, to the Company’s knowledge, is threatened, and the Company is not aware of any existing or imminent labor disturbance by the employees of any of its or its subsidiaries’ principal suppliers, contractors or customers, except as would not have or be reasonably likely to have a Material Adverse Effect and except as set forth in or contemplated in the Disclosure Package and the Final Prospectus (exclusive of any amendment or supplement thereto).

(w)    The Company and each of its subsidiaries are insured by insurers of recognized financial responsibility or self-insured against such losses and risks and in such amounts, to the knowledge of the Company and its subsidiaries, as are prudent and customary in the businesses in which they are engaged except where the failure to be so insured would not have a Material Adverse Effect; all policies of insurance and fidelity or surety bonds insuring the Company or any of its subsidiaries or their respective businesses, assets, employees, officers and directors are in full force and effect, except where such failure to be in full force and effect would not have a Material Adverse Effect; the Company and its subsidiaries are in compliance with the terms of such policies and instruments, except where any such non-compliance would not have or be reasonably likely to have a Material Adverse Effect; there are no claims by the Company or any of its subsidiaries under any such policy or instrument as to which any insurance company is denying liability or defending under a reservation of rights clause, except for any claims the non-payment of which would not have or be reasonably likely to have a Material Adverse Effect; neither the Company nor any of its subsidiaries has been refused any insurance coverage sought or applied for, except where any such refusal of insurance coverage would not have a Material Adverse Effect; and neither the Company nor any of its subsidiaries has any reason to believe that it will not be able to renew its existing insurance coverage as and when such coverage expires or to obtain similar coverage from similar insurers as may be necessary to continue its business at a cost that would not have or be reasonably likely to have a Material Adverse Effect, except as set forth in or contemplated in the Disclosure Package and the Final Prospectus (exclusive of any amendment or supplement thereto).

(x)    No subsidiary of the Company is currently prohibited, directly or indirectly, from paying any dividends to the Company, from making any other distribution on such subsidiary’s capital stock, from repaying to the Company any loans or advances to such subsidiary from the Company or from transferring any of such subsidiary’s property or assets to the Company or any other subsidiary of the Company, except as described in or contemplated by the Disclosure Package and the Final Prospectus (exclusive of any amendment or supplement thereto).

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(y)    The Company and its subsidiaries possess all licenses, certificates, permits and other authorizations issued by all applicable authorities necessary to conduct their respective businesses, and neither the Company nor any of its subsidiaries has received any notice of proceedings relating to the revocation or modification of any such certificate, authorization or permit which, individually or in the aggregate, if the subject of an unfavorable decision, ruling or finding, would have a Material Adverse Effect, except as set forth in or contemplated in the Disclosure Package and the Final Prospectus (exclusive of any amendment or supplement thereto).

(z)    Except as set forth in or contemplated in the Disclosure Package and the Final Prospectus, the Company and each of its subsidiaries maintain a system of internal accounting controls designed to provide reasonable assurance that (i) transactions are executed in accordance with management’s general or specific authorizations; (ii) transactions are recorded as necessary to permit preparation of financial statements in conformity with IFRS and to maintain asset accountability; (iii) access to assets is permitted only in accordance with management’s general or specific authorization; (iv) the recorded accountability for assets is compared with the existing assets at reasonable intervals and appropriate action is taken with respect to any differences; and (v) the interactive data in XBRL incorporated by reference in the Registration Statement, the Preliminary Prospectus and the Final Prospectus is in compliance in all material respects with the SEC’s published rules, regulations and guidelines applicable thereto. The Company and its subsidiaries are not aware of any material weakness in their internal controls over financial reporting except as set forth in or contemplated in the Disclosure Package and the Final Prospectus (exclusive of any amendment or supplement thereto).

(aa)    The Company and its subsidiaries maintain “disclosure controls and procedures” (as such term is defined in Rule 13a-15(e) under the Exchange Act).

(bb)    The Company has not taken, directly or indirectly (without giving effect to the activities of the Underwriters), any action designed to or that would constitute or that would reasonably be expected to cause or result in, under the Exchange Act or otherwise, stabilization or manipulation of the price of any security of the Company to facilitate the sale or resale of the Securities.

(cc)    Except as set forth in or contemplated in the Disclosure Package and the Final Prospectus (exclusive of any amendment or supplement thereto), the Company and its subsidiaries are (i) in compliance with any and all international, national, regional, local and other laws, rules, regulations, decisions and orders, in each case applicable to and legally binding on them, relating to the protection of human health and safety as related to hazardous materials exposure, the environment or hazardous or toxic substances or wastes, pollutants or contaminants (collectively, “Environmental Laws”), (ii) have received and are in compliance with all governmental permits, licenses or other approvals required of them under applicable Environmental Laws to conduct their respective businesses (collectively, “Environmental Permits”) and (iii) have not received notice of any actual or potential liability under any Environmental Law, except in any case where such non-compliance with Environmental Laws or, failure to receive or comply with the terms and conditions of required Environmental Permits or liability

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would not, individually or in the aggregate, have a Material Adverse Effect. The Company and its subsidiaries are not aware of any pending investigation which would reasonably be expected to lead to a claim of such liability, except any such liability as would not, individually or in the aggregate, be expected to have a Material Adverse Effect.

(dd)    The Company confirms the authority of the Representatives to make adequate public disclosure of the information required by the U.K. Financial Services Authority’s Code of Market Conduct (MAR 2) Price Stabilising Rules.

(ee) There is and has been no failure on the part of the Company and any of the Company’s directors or officers, in their capacities as such, to comply with any applicable provision of the Sarbanes-Oxley Act of 2002, as amended, and the rules and regulations promulgated in connection thereunder applicable to the Company.

(ff)    Neither the Company nor any of its subsidiaries nor, to the knowledge of the Company, any director, officer, agent, employee or Affiliate of the Company or any of its subsidiaries is aware of or has taken any action, directly or indirectly, that would result in a violation by such persons of the Foreign Corrupt Practices Act of 1977, as amended, and the rules and regulations thereunder (the “FCPA”) or the U.K. Bribery Act of 2010, as amended, and the rules and regulations thereunder (the “U.K. Bribery Act”), including, without limitation, making use of the mails or any means or instrumentality of interstate commerce corruptly in furtherance of an offer, payment, promise to pay or authorization of the payment of any money, or other property, gift, promise to give, or authorization of the giving of anything of value to any “foreign official” (as such term is defined in the FCPA) or “foreign public official” (as such term is defined in the U.K. Bribery Act) or any foreign political party or official thereof or any candidate for foreign political office, in contravention of the FCPA or the U.K. Bribery Act; and the Company, its subsidiaries and, to the knowledge of the Company, its Affiliates have conducted their businesses in compliance with the FCPA and the U.K. Bribery Act. For the purposes of this Agreement, an “Affiliate” of a specified person shall mean a person that directly, or indirectly through one or more intermediaries, controls or is controlled by, or is under common control with, the person specified.

(gg)    The operations of the Company and its subsidiaries are and have been conducted at all times in compliance with applicable financial recordkeeping and reporting requirements and the money laundering statutes and the rules and regulations thereunder and any related or similar rules, regulations or guidelines, issued, administered or enforced by any governmental agency (collectively, the “Money Laundering Laws”) and no action, suit or proceeding by or before any court or governmental agency, authority or body or any arbitrator involving the Company or any of its subsidiaries with respect to the Money Laundering Laws is pending or, to the best knowledge of the Company, threatened.

(hh)    None of the Company, any of its subsidiaries or, to the knowledge of the Company, any director, officer, agent, employee or affiliate of the Company or any of its subsidiaries is currently subject to any sanctions administered or enforced by the United

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States Government, including, without limitation, the Office of Foreign Assets Control of the U.S. Department of the Treasury (“OFAC”), the United Nations Security Council (“UNSC”), the European Union, Her Majesty’s Treasury (“HMT”), or other relevant sanctions authority (collectively, “Sanctions”); nor is the Company located, organized or resident in a country or territory that is the subject of Sanctions; and the Company will not directly or indirectly use the proceeds of the offering of the Securities hereunder, or lend, contribute or otherwise make available such proceeds to any subsidiary, joint venture partner or other person or entity, for the purpose of financing the activities of any person currently subject to any Sanctions. It is acknowledged and agreed that, the benefit of this paragraph (hh) is only sought and given to the extent that to do so would be permissible pursuant to any applicable anti-boycott statute such as (i) Regulation (EC) 2271/96 or (ii) a similar anti-boycott statute. It is also acknowledged and agreed that with regard to any subsidiary of the Company incorporated in Germany, the provisions set forth in this paragraph shall not apply if and to the extent that the expression of, or compliance with such provisions would breach or conflict with mandatory provisions of German law (including section 7 of the German Foreign Trade Ordinance (Verordnung zur Durchführung des Außenwirtschaftsgesetzes).

(ii)    Each of the Company and its subsidiaries has good and marketable title to all real and personal property described in the Disclosure Package, the Final Prospectus and the Registration Statement as being owned by it and (assuming good title by the lessor) good title to a leasehold estate in the real and personal property described in the Disclosure Package, the Final Prospectus and the Registration Statement as being leased by it pursuant to leases that are still in full force and effect, free and clear of all liens, charges, encumbrances or restrictions, except to the extent the failure to have such title or the existence of such liens, charges, encumbrances or restrictions would not, individually or in the aggregate, have a Material Adverse Effect.

(jj)    The Company and each of its subsidiaries owns, possesses or has the right to use all patents, patent rights, licenses, copyrights and know-how (including trade secrets and other unpatented and/or unpatentable proprietary or confidential information, systems or procedures), trademarks, service marks and trade names (collectively, “Intellectual Property”) necessary to conduct their respective businesses now operated by them except where the failure to own or possess such right would not, individually or in the aggregate, have a Material Adverse Effect, and none of the Company or its subsidiaries has received any notice of any claim of infringement of or conflict with any such rights of others with respect to any Intellectual Property and are unaware of any facts which would form a reasonable basis for any such conflict or claim except for any such conflict or claim that would not, individually or in the aggregate, have a Material Adverse Effect.

(kk)    No proceedings have been commenced for the purposes of, and no judgment has been rendered for, the liquidation, bankruptcy, judicial reorganization, moratorium or winding-up of the Company or any of its subsidiaries.

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(ll)    (i) Except as may be included or incorporated by reference in the Registration Statement, the General Disclosure Package and the Final Prospectus, (x) to the Company’s knowledge, there has been no material security breach or other material compromise of or relating to any of the Company’s or its subsidiaries’ information technology and computer systems, networks, hardware, software, data (including the data of their respective customers, employees, suppliers, vendors and any third party data maintained by or on behalf of them), equipment or technology (collectively, “IT Systems and Data”) and (y) the Company and its subsidiaries have not been notified of, and have no knowledge of any event or condition that would reasonably be expected to result in, any material security breach or other material compromise to their IT Systems and Data; (ii) to the Company’s knowledge, the Company and its subsidiaries are presently in compliance with all applicable laws or statutes and all judgments, orders, rules and regulations of any court or arbitrator or governmental or regulatory authority, internal policies and contractual obligations relating to the privacy and security of IT Systems and Data and to the protection of such IT Systems and Data from unauthorized use, access, misappropriation or modification, except as would not, in the case of this clause (ii), reasonably be expected to have a Material Adverse Effect; and (iii) the Company and its subsidiaries have implemented backup and disaster recovery technology as the Company reasonably believes is consistent with industry standards and practices.

Any certificate signed by an officer of the Company and delivered to the Representatives or counsel for the Underwriters in connection with the offering of the Securities shall be deemed a representation and warranty by the Company, as to matters covered thereby, to each Underwriter.

2.    Purchase and Sale.

(a)    Subject to the terms and conditions and in reliance upon the representations and warranties herein set forth, the Company agrees, severally and not jointly, to issue and sell to each Underwriter, and each Underwriter agrees, severally and not jointly, to purchase from the Company, at the purchase price set forth in Schedule I hereto, the number of Underwritten Securities set forth opposite such Underwriter’s name in Schedule II hereto.

(b)    Subject to the terms and conditions and in reliance upon the representations and warranties herein set forth, the Company hereby grants an option to the several Underwriters to purchase, severally and not jointly, up to the number of Option Securities set forth in Schedule I hereto at the same purchase price per share as the Underwriters shall pay for the Underwritten Securities, less an amount per share equal to any dividends or distributions declared by the Company and payable on the Underwritten Securities but not payable on the Option Securities. Said option may be exercised in whole or in part at any time on or before the 30^th day after the date of the Final Prospectus upon written or telegraphic notice by the Representatives to the Company setting forth the number of Option Securities as to which the several Underwriters are exercising the option and the settlement date. In the event that the Underwriters exercise less than their full option to purchase Option Securities, the number of Option Securities to be sold by the Company shall be, as nearly as practicable, in the same proportion as the maximum number of Option Securities to be sold by the Company and the number of Option Securities to be sold. The number of Option

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Securities to be purchased by each Underwriter shall be the same percentage of the total number of Option Securities to be purchased by the several Underwriters as such Underwriter is purchasing of the Underwritten Securities, subject to such adjustments as you in your absolute discretion shall make to eliminate any fractional shares.

3.    Delivery and Payment. Delivery through issuance of, and payment for, the Underwritten Securities and the Option Securities (if the option provided for in Section 2(b) hereof shall have been exercised on or before the second Business Day immediately preceding the Closing Date) shall be made on the date and at the time specified in Schedule I hereto, or at such time on such later date not more than two Business Days after the foregoing date as the Representatives shall designate, which date and time may be postponed by agreement among the Representatives and the Company or as provided in Section 9 hereof (such date and time of delivery and payment for the Securities being herein called the “Closing Date”). As used herein, “Business Day” shall mean any day other than a Saturday, a Sunday or a legal holiday or a day on which banking institutions or trust companies are authorized or obligated by law to close in New York City or The Netherlands. Delivery of the Securities shall be made to the Representatives for the respective accounts of the several Underwriters against payment by the several Underwriters through the Representatives of the respective aggregate purchase price of the Securities being sold by the Company to or upon the order of the Company by wire transfer payable in same-day funds to the account specified by the Company. Delivery of the Underwritten Securities and the Option Securities shall be made through the facilities of The Depository Trust Company unless the Representatives shall otherwise instruct.

If the option provided for in Section 2(b) hereof is exercised after the second Business Day immediately preceding the Closing Date, the Company will deliver the Option Securities (at the expense of the Company) to the Representatives, at 388 Greenwich Street, New York, New York, on the date specified by the Representatives (which shall be within two Business Days after exercise of said option) for the respective accounts of the several Underwriters, against payment by the several Underwriters through the Representatives of the purchase price thereof to or upon the order of the Company by wire transfer payable in same-day funds to an account specified by the Company. If settlement for the Option Securities occurs after the Closing Date, the Company will deliver to the Representatives on the settlement date for the Option Securities, and the obligation of the Underwriters to purchase the Option Securities shall be conditioned upon receipt of, supplemental opinions, certificates and letters confirming as of such date the opinions, certificates and letters delivered on the Closing Date pursuant to Section 6 hereof.

4.    Offering by Underwriters. It is understood that the several Underwriters propose to offer the Securities for sale to the public as set forth in the Final Prospectus.

5.    Agreements. The Company agrees with the several Underwriters that:

(a)    Prior to the termination of the offering of the Securities, the Company will not file any amendment of the Registration Statement or supplement (including the Final Prospectus or any Preliminary Prospectus) to the Base Prospectus unless the Company has furnished you a copy for your review prior to filing and will not file any such proposed amendment or supplement to which you reasonably object. The Company will cause the Final Prospectus, properly completed, and any supplement thereto to be

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filed in a form approved by the Representatives with the SEC pursuant to the applicable paragraph of Rule 424(b) within the time period prescribed and will provide evidence satisfactory to the Representatives of such timely filing. The Company will promptly advise the Representatives (i) when the Final Prospectus, and any supplement thereto, shall have been filed (if required) with the SEC pursuant to Rule 424(b), (ii) when, prior to termination of the offering of the Securities, any amendment to the Registration Statement shall have been filed or become effective, (iii) of any request by the SEC or its staff for any amendment of the Registration Statement or for any supplement to the Final Prospectus or for any additional information, (iv) of the issuance by the SEC of any stop order suspending the effectiveness of the Registration Statement or of any notice objecting to its use or the institution or threatening of any proceeding for that purpose and (v) of the receipt by the Company of any notification with respect to the suspension of the qualification of the Securities for sale in any jurisdiction or the institution or threatening of any proceeding for such purpose. The Company will use its commercially reasonable best efforts to prevent the issuance of any such stop order or the occurrence of any such suspension or objection to the use of the Registration Statement and, upon such issuance, occurrence or notice of objection, to obtain as soon as possible the withdrawal of such stop order or relief from such occurrence or objection, including, if necessary, by filing an amendment to the Registration Statement or a new registration statement and using its commercially reasonable best efforts to have such amendment or new registration statement declared effective as soon as practicable.

(b)    If, at any time prior to the filing of the Final Prospectus pursuant to Rule 424(b) , any event occurs as a result of which the Disclosure Package would include any untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein in the light of the circumstances under which they were made or the circumstances then prevailing not misleading, the Company will (i) notify promptly the Representatives so that any use of the Disclosure Package may cease until it is amended or supplemented; (ii) amend or supplement the Disclosure Package to correct such statement or omission; and (iii) supply any amendment or supplement to you in such quantities as you may reasonably request.

(c)    If, at any time when a prospectus relating to the Securities is required to be delivered under the Securities Act (including in circumstances where such requirement may be satisfied pursuant to Rule 172), any event occurs as a result of which the Final Prospectus as then supplemented would include any untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein in the light of the circumstances under which they were made or the circumstances then prevailing not misleading, or if it shall be necessary to amend the Registration Statement, file a new registration statement or supplement the Final Prospectus to comply with the Securities Act or the Exchange Act or the respective rules thereunder, including in connection with use or delivery of the Final Prospectus, the Company promptly will (i) notify the Representatives of any such event, (ii) prepare and file with the SEC, subject to the second sentence of paragraph (a) of this Section 5, an amendment or supplement or new registration statement which will correct such statement or omission or effect such compliance, (iii) use its commercially reasonable best efforts to have any amendment to the Registration Statement or new registration statement declared effective

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as soon as practicable in order to avoid any disruption in use of the Final Prospectus and (iv) supply any supplemented Final Prospectus to you in such quantities as you may reasonably request.

(d)    As soon as practicable, the Company will make generally available to its security holders and to the Representatives an earnings statement or statements of the Company and its subsidiaries which will satisfy the provisions of Section 11(a) of the Securities Act and Rule 158 under the Securities Act; provided that the Company will be deemed to have satisfied this obligation to the extent it files such documents on the EDGAR system of the SEC.

(e)    The Company will furnish to the Representatives and counsel for the Underwriters, without charge, signed copies of the Registration Statement (including exhibits thereto) and to each other Underwriter a copy of the Registration Statement (without exhibits thereto) and, so long as delivery of a prospectus by an Underwriter or dealer may be required by the Securities Act (including in circumstances where such requirement may be satisfied pursuant to Rule 172), as many copies of each Preliminary Prospectus, the Final Prospectus and each Issuer Free Writing Prospectus and any supplement thereto as the Representatives may reasonably request. The Company will pay the expenses of printing or other production of all documents relating to the offering.

(f)    The Company will arrange, if necessary, for the qualification of the Securities for sale by the Underwriters under the laws of such jurisdictions as the Representatives may designate and will maintain such qualifications in effect so long as required for the distribution of the Securities; provided that in no event shall the Company be obligated to qualify to do business in any jurisdiction where it is not now so qualified or to take any action that would subject it to service of process in suits, other than those arising out of the offering or sale of the Securities, or taxation in any jurisdiction where it is not now so subject.

(g)    The Company will not, without the prior written consent of the Representatives, offer, sell, contract to sell, pledge, or otherwise dispose of, (or enter into any transaction which is designed to, or would reasonably be expected to, result in the disposition (whether by actual disposition or effective economic disposition due to cash settlement or otherwise) by the Company or any Affiliate of the Company or any person in privity with the Company or any Affiliate of the Company) directly or indirectly, including the filing (or participation in the filing) of a registration statement with the SEC in respect of, or establish or increase a put equivalent position or liquidate or decrease a call equivalent position within the meaning of Section 16 of the Exchange Act, any other Ordinary Shares or any securities convertible into, or exercisable for, Ordinary Shares (the “Lock-Up Securities”); or publicly announce an intention to effect any such transaction, until the Business Day set forth on Schedule I hereto, provided, however, that the Company may (i) offer, issue and sell the Securities in the offering contemplated by this Agreement, (ii) issue and sell Ordinary Shares pursuant to any equity incentive plan, employee share ownership plan or dividend reinvestment plan of the Company in effect at the Execution Time, (iii) adopt a new employee share ownership plan, award and issue Ordinary Shares for no consideration pursuant to such new employee share ownership

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plan and file a registration statement on Form S-8 under the Securities Act to register the offer and sale of securities to be issued pursuant to such new employee share ownership plan, (iv) issue and sell Ordinary Shares issuable upon the conversion of securities or the exercise of warrants outstanding at the Execution Time and (v) offer, issue or sell Lock-Up Securities as consideration or as partial consideration for an acquisition or in connection with a strategic investment (including a joint venture or partnership), provided that each recipient of any Lock-Up Securities issued or sold pursuant to this clause (v) shall be subject to restrictions on transfer on such Lock-Up Securities containing substantially the same terms as the lock-up letters described in Section 6(l) of this Agreement and provided that the aggregate number of Ordinary Shares or securities convertible into or exercisable for Ordinary Shares (on an as-converted or as-exercised basis, as the case may be) that the Company may sell or issue or agree to sell or issue as described in this clause (v) shall not exceed 10% of the total number of Ordinary Shares issued and outstanding immediately following the completion of the transactions contemplated by this Agreement.

(h)    The Company will not take, directly or indirectly (without giving effect to the activities of the Underwriters), any action (which action shall not include the Company’s grant to the Underwriters of an option to purchase the Option Securities) designed to or that would constitute or that would reasonably be expected to cause or result in, under the Exchange Act or otherwise, stabilization or manipulation of the price of any security of the Company to facilitate the sale or resale of the Securities.

(i)    The Company agrees to pay the costs and expenses relating to the following matters: (i) the preparation, printing or reproduction and filing with the SEC of the Registration Statement (including financial statements and exhibits thereto), each Preliminary Prospectus, the Final Prospectus and each Issuer Free Writing Prospectus, and each amendment or supplement to any of them; (ii) the printing (or reproduction) and delivery (including postage, air freight charges and charges for counting and packaging) of such copies of the Registration Statement, each Preliminary Prospectus, the Final Prospectus and each Issuer Free Writing Prospectus, and all amendments or supplements to any of them, as may, in each case, be reasonably requested for use in connection with the offering and sale of the Securities; (iii) the preparation, printing, authentication, issuance and delivery of the Securities, including any stamp or transfer taxes in connection with the original issuance and sale of the Securities; (iv) the printing (or reproduction) and delivery of this Agreement, any blue sky memorandum and all other agreements or documents printed (or reproduced) and delivered in connection with the offering of the Securities; (v) the registration of the Securities under the Exchange Act and the listing of the Securities on the New York Stock Exchange; (vi) any registration or qualification of the Securities for offer and sale under the securities or blue sky laws of the several states, the provinces of Canada and any other jurisdictions specified pursuant to Section 5(f) (including filing fees and the reasonable fees and expenses of counsel for the Underwriters relating to such registration and qualification); (vii) the transportation and other reasonable out-of-pocket expenses incurred by or on behalf of Company representatives in connection with presentations to prospective purchasers of the Securities; and (viii) the fees and expenses of the Company’s accountants and the fees and expenses of counsel (including local and special counsel) for the Company.

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(j)    The Company agrees that, unless it has or shall have obtained the prior written consent of the Representatives, and each Underwriter, severally and not jointly, agrees with the Company that, unless it has or shall have obtained, as the case may be, the prior written consent of the Company, it has not made and will not make any offer relating to the Securities that would constitute an Issuer Free Writing Prospectus or that would otherwise constitute a Free Writing Prospectus required to be filed by the Company with the SEC or retained by the Company under Rule 433 under the Securities Act (“Rule 433”); provided that the prior written consent of the parties hereto shall be deemed to have been given in respect of the Free Writing Prospectuses included in Schedule III hereto and any electronic road show. Any such free writing prospectus consented to by the Representatives or the Company is hereinafter referred to as a “Permitted Free Writing Prospectus.” The Company agrees that (x) it has treated and will treat, as the case may be, each Permitted Free Writing Prospectus as an Issuer Free Writing Prospectus and (y) it has complied and will comply, as the case may be, with the requirements of Rule 164 under the Securities Act (“Rule 164”) and Rule 433 applicable to any Permitted Free Writing Prospectus, including in respect of timely filing with the SEC, legending and record keeping.

6.    Conditions to the Obligations of the Underwriters. The obligations of the Underwriters to purchase the Underwritten Securities and the Option Securities, as the case may be, shall be subject to the accuracy of the representations and warranties on the part of the Company contained herein as of the Execution Time, the Closing Date and any settlement date pursuant to Section 3 hereof, to the accuracy of the statements of the Company made in any certificates pursuant to the provisions hereof, to the performance by the Company of its obligations hereunder and to the following additional conditions:

(a)    The Final Prospectus, and any supplement thereto, have been filed in the manner and within the time period required by Rule 424(b); any other material required to be filed by the Company pursuant to Rule 433(d) shall have been filed with the SEC within the applicable time periods prescribed for such filings by Rule 433; and no stop order suspending the effectiveness of the Registration Statement or any notice objecting to its use shall have been issued and no proceedings for that purpose shall have been instituted or threatened.

(b)    The Company shall have requested and caused Latham & Watkins LLP, counsel for the Company, to have furnished to the Representatives its opinion and negative assurance letter, dated the Closing Date and addressed to the Representatives, in form and substance reasonably satisfactory to the Representatives.

(c)    The Company shall have requested and caused Loyens & Loeff N.V., Dutch counsel for the Company, to have furnished to the Representatives its opinion, dated the Closing Date and addressed to the Representatives, in form and substance reasonably satisfactory to the Representatives.

(d)    The Representatives shall have received from Shearman & Sterling (London) LLP, counsel for the Underwriters, such opinion or opinions, dated the Closing Date and addressed to the Representatives, with respect to the issuance and sale of the

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Securities, the Registration Statement, the Disclosure Package, the Final Prospectus (together with any supplement thereto) and other related matters as the Representatives may reasonably require, and the Company shall have furnished to such counsel such documents as they reasonably request for the purpose of enabling them to pass upon such matters.

(e)    The Representatives shall have received from Van Doorne N.V., counsel for the Underwriters, such opinion or opinions, dated the Closing Date and addressed to the Representatives, with respect to the issuance and sale of the Securities, the Registration Statement, the Disclosure Package, the Final Prospectus (together with any supplement thereto) and other related matters as the Representatives may reasonably require, and the Company shall have furnished to such counsel such documents as they reasonably request for the purpose of enabling them to pass upon such matters.

(f)    The Company shall have furnished to the Representatives a certificate of the Company, signed by the Chairman of the Board or the President and the chief executive officer of the Company, dated the Closing Date, to the effect that the signers of such certificate have carefully examined the Registration Statement, the Disclosure Package, the Final Prospectus and any amendments or supplements thereto, as well as each electronic road show used in connection with the offering of the Securities, and this Agreement and that:

(i)    the representations and warranties of the Company in this Agreement are true and correct in all material respects (except to the extent that such representation and warranty is itself qualified by materiality) on and as of the Closing Date with the same effect as if made on the Closing Date and the Company has complied with all the agreements and satisfied all the conditions (except to the extent that such representation and warranty is itself qualified by materiality) on its part to be performed or satisfied hereunder at or prior to the Closing Date;

(ii)    no stop order suspending the effectiveness of the Registration Statement or any notice objecting to its use has been issued and no proceedings for that purpose have been instituted or, to the Company’s knowledge, threatened; and

(iii)    since the date of the most recent financial statements incorporated by reference in the Disclosure Package and the Final Prospectus (exclusive of any amendment or supplement thereto), there has been no material adverse change in the financial condition, earnings, business or properties of the Company and its subsidiaries, taken as a whole, whether or not arising from transactions in the ordinary course of business, except as set forth in or contemplated in the Disclosure Package and the Final Prospectus (exclusive of any amendment or supplement thereto).

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(g)    At the Execution Time and on the Closing Date, the Company shall have requested and caused KPMG Accountants N.V., to furnish to the Representatives letters, dated on the date of the Execution Time and as of the Closing Date, respectively, in form and substance satisfactory to the Representatives, containing statements and information of the type customarily included in accountants’ comfort letters to underwriters with respect to the financial statements and certain other financial information contained in the Disclosure Package and the Final Prospectus.

(h)    Subsequent to the Execution Time or, if earlier, the dates as of which information is given in the Registration Statement (exclusive of any amendment thereof) and the Final Prospectus (exclusive of any supplement thereto), there shall not have been (i) any change or decrease specified in the letters referred to in paragraph (g) of this Section 6; or (ii) any change in or affecting the financial condition, earnings, business or properties of the Company and its subsidiaries taken as a whole, whether or not arising from transactions in the ordinary course of business, except as set forth in or contemplated in the Disclosure Package and the Final Prospectus (exclusive of any amendment or supplement thereto) the effect of which, in any case referred to in clause (i) or (ii) above, is, in the sole judgment of the Representatives, so material and adverse as to make it impractical or inadvisable to proceed with the offering or delivery of the Securities as contemplated by the Registration Statement (exclusive of any amendment thereof), the Disclosure Package and the Final Prospectus (exclusive of any amendment or supplement thereto).

(i)    Prior to the Closing Date, the Company shall have furnished to the Representatives such further information, certificates and documents as the Representatives may reasonably request.

(j)    Subsequent to the Execution Time, there shall not have been any decrease in the rating of any of the Company’s debt securities by any “nationally recognized statistical rating organization” (as defined for purposes of Section 3(a)(62) of the Exchange Act) or any notice given of any intended or potential decrease in any such rating or of a possible change in any such rating that does not indicate the direction of the possible change.

(k)    The Securities shall have been listed and admitted and authorized for trading on the New York Stock Exchange, and satisfactory evidence of such actions shall have been provided to the Representatives.

(l)    At the Execution Time, the Company shall have furnished to the Representatives a letter substantially in the form of Exhibit A hereto from each of the individuals listed on the Schedule IV hereto addressed to the Representatives.

If any of the conditions specified in this Section 6 shall not have been fulfilled when and as provided in this Agreement, or if any of the opinions and certificates mentioned above or elsewhere in this Agreement shall not be reasonably satisfactory in form and substance to the Representatives and counsel for the Underwriters, this Agreement and all obligations of the Underwriters hereunder may be canceled at, or at any time prior to, the Closing Date by the Representatives. Notice of such cancellation shall be given to the Company in writing or by telephone or facsimile confirmed in writing.

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The documents required to be delivered by this Section 6 shall be delivered at the office of Shearman & Sterling (London) LLP, counsel for the Underwriters, at 9 Appold Street, London EC2A 2AP, United Kingdom, on the Closing Date.

7.    Reimbursement of Underwriters’ Expenses. If the sale of the Securities provided for herein is not consummated because any condition to the obligations of the Underwriters set forth in Section 6 hereof is not satisfied, because of any termination pursuant to Section 10 hereof or because of any refusal, inability or failure on the part of the Company to perform any agreement herein or to comply with any provision hereof other than by reason of a default by any of the Underwriters, the Company will reimburse the Underwriters severally through Citigroup Global Markets Inc. on demand for all reasonable and documented out-of-pocket expenses (including reasonable fees and disbursements of counsel for the Underwriters) that shall have been incurred by them in connection with the proposed purchase and sale of the Securities.

8.    Indemnification and Contribution.

(a)    The Company agrees to indemnify and hold harmless each Underwriter, the directors, officers, employees, Affiliates and agents of each Underwriter and each person who controls any Underwriter within the meaning of either the Securities Act or the Exchange Act against any and all losses, claims, damages or liabilities, joint or several, to which they or any of them may become subject under the Securities Act, the Exchange Act or other U.S. federal or state statutory law or regulation, at common law or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon any untrue statement or alleged untrue statement of a material fact contained in the Registration Statement, or in the Base Prospectus, any Preliminary Prospectus, the Final Prospectus, any Issuer Free Writing Prospectus, or in any amendment thereof or supplement thereto, or arise out of or are based upon the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading, and agrees to reimburse each such indemnified party, as incurred, for any documented legal or other expenses reasonably incurred by it in connection with investigating or defending any such loss, claim, damage, liability or action; provided, however, that the Company will not be liable in any such case to the extent that any such loss, claim, damage or liability arises out of or is based upon any such untrue statement or alleged untrue statement or omission or alleged omission made in the Registration Statement, or in the Base Prospectus, any Preliminary Prospectus, the Final Prospectus, any Issuer Free Writing Prospectus, or in any amendment thereof or supplement thereto in reliance upon and in conformity with written information furnished to the Company by or on behalf of any Underwriter through the Representatives specifically for inclusion therein. This indemnity agreement will be in addition to any liability that the Company may otherwise have.

(b)    Each Underwriter severally and not jointly agrees to indemnify and hold harmless the Company, each of its directors and officers, and each person who controls the Company within the meaning of either the Securities Act or the Exchange Act, to the same extent as the foregoing indemnity from the Company to each Underwriter, but only

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with reference to written information relating to such Underwriter furnished to the Company by or on behalf of such Underwriter through the Representatives specifically for inclusion in the Registration Statement, or in the Base Prospectus, any Preliminary Prospectus, the Final Prospectus, any Issuer Free Writing Prospectus, or in any amendment thereof or supplement thereto. This indemnity agreement will be in addition to any liability which any Underwriter may otherwise have. The Company acknowledges that the statements set forth (i) in the last paragraph of the cover page regarding delivery of the Securities, (ii) the list of Underwriters and their respective participation in the sale of the Securities under the heading “Underwriting”, (iii) the second and third sentences of the third paragraph under the heading “Underwriting” related to concessions and reallowances and (iv) the ninth and tenth paragraphs under the heading “Underwriting”, related to stabilization, syndicate covering transactions and penalty bids in any Preliminary Prospectus and the Final Prospectus constitute the only information furnished in writing by or on behalf of the several Underwriters for inclusion in any Preliminary Prospectus, the Final Prospectus or any Issuer Free Writing Prospectus.

(c)    Promptly after receipt by an indemnified party under this Section 8 of notice of the commencement of any action, such indemnified party will, if a claim in respect thereof is to be made against the indemnifying party under this Section 8, notify the indemnifying party in writing of the commencement thereof; but the failure so to notify the indemnifying party (i) will not relieve it from liability under paragraph (a) or (b) above unless and to the extent it did not otherwise learn of such action and such failure results in the forfeiture by the indemnifying party of substantial rights and defenses and (ii) will not, in any event, relieve the indemnifying party from any obligations to any indemnified party other than the indemnification obligation provided in paragraph (a) or (b) above. The indemnifying party shall be entitled to appoint counsel (including local counsel) of the indemnifying party’s choice at the indemnifying party’s expense to represent the indemnified party in any action for which indemnification is sought (in which case the indemnifying party shall not thereafter be responsible for the fees and expenses of any separate counsel retained by the indemnified party or parties except as set forth below); provided, however, that such counsel shall be satisfactory to the indemnified party. Notwithstanding the indemnifying party’s election to appoint counsel (including local counsel) to represent the indemnified party in an action, the indemnified party shall have the right to employ separate counsel (including local counsel), and the indemnifying party shall bear the reasonable fees, costs and expenses of such separate counsel if (i) the use of counsel chosen by the indemnifying party to represent the indemnified party would present such counsel with a conflict of interest, (ii) the actual or potential defendants in, or targets of, any such action include both the indemnified party and the indemnifying party and the indemnified party shall have reasonably concluded that there may be legal defenses available to it and/or other indemnified parties that are different from or additional to those available to the indemnifying party, (iii) the indemnifying party shall not have employed counsel satisfactory to the indemnified party to represent the indemnified party within a reasonable time after notice of the institution of such action or (iv) the indemnifying party shall authorize the indemnified party to employ separate counsel at the expense of the indemnifying party. It is understood that the indemnifying party shall not, in respect of

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the legal expenses of any indemnified party in connection with any proceeding or related proceedings in the same jurisdiction, be liable for the fees and expenses of more than one separate counsel (in addition to any local counsel) for all such indemnified parties and that all such fees and expenses shall be reimbursed as they are incurred; provided, however, that should the interests of such indemnified parties not be substantially the same, each indemnified party shall have the right to appoint its own separate counsel and the indemnifying party shall be liable for the fees and expenses of each separate counsel. Such counsel shall be designated in writing by the Initial Purchasers in the case of parties indemnified pursuant to Section 8(a) above, and by the Company, in the case of parties indemnified pursuant to Section 8(b). An indemnifying party will not, without the prior written consent of the indemnified parties, settle or compromise or consent to the entry of any judgment with respect to any pending or threatened claim, action, suit or proceeding in respect of which indemnification or contribution may be sought hereunder (whether or not the indemnified parties are actual or potential parties to such claim or action) unless such settlement, compromise or consent (i) includes an unconditional release of each indemnified party from all liability arising out of such claim, action, suit or proceeding and (ii) does not include a statement as to or an admission of fault, culpability or a failure to act, by or on behalf of any indemnified party. An indemnifying party shall not be liable to any indemnified party regarding any settlement or compromise or consent or the entry of any judgment with respect to any pending or threatened claim, action, suit or proceeding in respect of which indemnification or contribution may be sought hereunder (whether or not the indemnified parties are actual or potential parties to such claim or action) unless such settlement, compromise or consent is consented to by such indemnifying party, which consent shall not be unreasonably withheld.

(d)    In the event that the indemnity provided in paragraph (a) or (b) of this Section 8 is unavailable to or insufficient to hold harmless an indemnified party for any reason, the Company on the one hand and the Underwriters on the other hand severally agree to contribute to the aggregate losses, claims, damages and liabilities (including legal or other expenses reasonably incurred in connection with investigating or defending any loss, claim, damage, liability or action) (collectively, “Losses”) to which the Company and one or more of the Underwriters may be subject in such proportion as is appropriate to reflect the relative benefits received by the Company and by the Underwriters from the offering of the Securities; provided, however, that in no case shall any Underwriter be responsible for any amount in excess of the underwriting discount or commission applicable to the Securities Purchased by such Underwriter hereunder. If the allocation provided by the immediately preceding sentence is unavailable for any reason, the Company and the Underwriters shall contribute in such proportion as is appropriate to reflect not only such relative benefits but also the relative fault of the Company on the one hand and of the Underwriters on the other hand in connection with the statements or omissions that resulted in such Losses as well as any other relevant equitable considerations. Benefits received by the Company shall be deemed to be equal to the total net proceeds from the offering (before deducting expenses) received by the Company, and benefits received by the Underwriters shall be deemed to be equal to the total underwriting discounts and commissions, in each case as set forth on the cover page of the Final Prospectus. Relative fault shall be determined by reference to, among other

21

things, whether any untrue or any alleged untrue statement of a material fact or the omission or alleged omission to state a material fact relates to information provided by the Company on the one hand or the Underwriters on the other, the intent of the parties and their relative knowledge, access to information and opportunity to correct or prevent such untrue statement or omission. The Company and the Underwriters agree that it would not be just and equitable if contribution were determined by pro rata allocation or any other method of allocation that does not take account of the equitable considerations referred to above. Notwithstanding the provisions of this paragraph (d), no person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Act) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation. For purposes of this Section 8, each person who controls an Underwriter within the meaning of either the Securities Act or the Exchange Act and each director, officer, employee, Affiliate and agent of an Underwriter shall have the same rights to contribution as such Underwriter, and each person who controls the Company within the meaning of either the Securities Act or the Exchange Act, each officer of the Company who shall have signed the Registration Statement and each director of the Company shall have the same rights to contribution as the Company, subject in each case to the applicable terms and conditions of this paragraph (d).

9.    Default by an Underwriter. If any one or more Underwriters shall fail to purchase and pay for any of the Securities agreed to be purchased by such Underwriter or Underwriters hereunder and such failure to purchase shall constitute a default in the performance of its or their obligations under this Agreement, the remaining Underwriters shall be obligated severally to take up and pay for (in the respective proportions which the amount of Securities set forth opposite their names in Schedule II hereto bears to the aggregate amount of Securities set forth opposite the names of all the remaining Underwriters) the Securities which the defaulting Underwriter or Underwriters agreed but failed to purchase; provided, however, that in the event that the aggregate amount of Securities which the defaulting Underwriter or Underwriters agreed but failed to purchase shall exceed 10% of the aggregate amount of Securities set forth in Schedule II hereto, the remaining Underwriters shall have the right to purchase all, but shall not be under any obligation to purchase any, of the Securities, and if such non-defaulting Underwriters do not purchase all the Securities, this Agreement will terminate without liability to any non-defaulting Underwriter or the Company. In the event of a default by any Underwriter as set forth in this Section 9, the Closing Date shall be postponed for such period, not exceeding five Business Days, as the Representatives shall determine in order that the required changes in the Registration Statement and the Final Prospectus or in any other documents or arrangements may be effected. Nothing contained in this Agreement shall relieve any defaulting Underwriter of its liability, if any, to the Company and any non-defaulting Underwriter for damages occasioned by its default hereunder.

10.    Termination. This Agreement shall be subject to termination in the absolute discretion of the Representatives, by notice given to the Company prior to delivery of and payment for the Securities, if at any time prior to such delivery and payment (i) trading in the Company’s Ordinary Shares shall have been suspended by the SEC or the New York Stock Exchange or trading in securities generally on the New York Stock Exchange shall have been suspended or limited or minimum prices shall have been established on such exchange, (ii) a banking moratorium shall have been declared either by Federal or New York State or Dutch

22

authorities, (iii) there shall have occurred a material disruption in commercial banking or securities settlement or clearance services, (iv) there shall have occurred any outbreak or escalation of hostilities, declaration by the United States of a national emergency or war, or other calamity or crisis the effect of which on financial markets is such as to make it, in the sole judgment of the Representatives, impractical or inadvisable to proceed with the offering or delivery of the Securities as contemplated by any Preliminary Prospectus or the Final Prospectus (exclusive of any amendment or supplement thereto); or (iv) exchange controls shall have been imposed by the United States or the Netherlands.

11.    Representations and Indemnities to Survive. The respective agreements, representations, warranties, indemnities and other statements of the Company or its officers and of the Underwriters set forth in or made pursuant to this Agreement will remain in full force and effect, regardless of any investigation made by or on behalf of any Underwriter or the Company or any of the officers, directors, employees, Affiliates, agents or controlling persons referred to in Section 8 hereof, and will survive delivery of and payment for the Securities. The provisions of Sections 7 and 8 hereof shall survive the termination or cancellation of this Agreement.

12.    Notices. All communications hereunder will be in writing and effective only on receipt, and, if sent to the Representatives, will be mailed, delivered or telefaxed to Citigroup Global Markets Inc. at 388 Greenwich Street, New York, New York 10013, Attention: General Counsel, facsimile number: +1 (646) 291-1469; or, if sent to InterXion Holding N.V., will be mailed, delivered or telefaxed to Scorpius 30, 2132 LR Hoofddorp, The Netherlands, + 31 (0)20 8807 601, Attention: Legal Department.

13.    Successors. This Agreement will inure to the benefit of and be binding upon the parties hereto and their respective successors and the officers, directors, employees, agents and controlling persons referred to in Section 8 hereof and their respective successors, and no other person will have any right or obligation hereunder.

14.    Jurisdiction. The Company agrees that any suit, action or proceeding against the Company brought by any Underwriter, the directors, officers, employees, Affiliates and agents of any Underwriter, or by any person who controls any Underwriter, arising out of or based upon this Agreement or the transactions contemplated hereby may be instituted in any State or U.S. federal court in The City of New York and County of New York, and waives any objection which it may now or hereafter have to the laying of venue of any such proceeding, and irrevocably submits to the non-exclusive jurisdiction of such courts in any suit, action or proceeding. The Company hereby appoints CT Corporation System, 111 Eighth Avenue, 13^th Floor, New York, New York 10011 as its authorized agent (the “Authorized Agent”) upon whom process may be served in any suit, action or proceeding arising out of or based upon this Agreement or the transactions contemplated herein that may be instituted in any State or U.S. federal court in The City of New York and County of New York, by any Underwriter, the directors, officers, employees, Affiliates and agents of any Underwriter, or by any person who controls any Underwriter, and expressly accepts the non-exclusive jurisdiction of any such court in respect of any such suit, action or proceeding. The Company hereby represents and warrants that the Authorized Agent has accepted such appointment and has agreed to act as said agent for service of process, and the Company agrees to take any and all action, including the filing of any and all documents that may be necessary to continue such appointment in full force and effect as

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aforesaid. Service of process upon the Authorized Agent shall be deemed, in every respect, effective service of process upon the Company. Notwithstanding the foregoing, any action arising out of or based upon this Agreement may be instituted by any Underwriter, the directors, officers, employees, Affiliates and agents of any Underwriter, or by any person who controls any Underwriter, in any court of competent jurisdiction in The Netherlands.

15.    Recognition of the U.S. Special Resolution Regimes.

(a)     In the event that any Underwriter that is a Covered Entity becomes subject to a proceeding under a U.S. Special Resolution Regime, the transfer from such Underwriter of this Agreement, and any interest and obligation in or under this Agreement, will be effective to the same extent as the transfer would be effective under the U.S. Special Resolution Regime if this Agreement, and any such interest and obligation, were governed by the laws of the United States or a state of the United States.

(b)     In the event that any Underwriter that is a Covered Entity or a BHC Act Affiliate of such Underwriter becomes subject to a proceeding under a U.S. Special Resolution Regime, Default Rights under this Agreement that may be exercised against such Underwriter are permitted to be exercised to no greater extent than such Default Rights could be exercised under the U.S. Special Resolution Regime if this Agreement were governed by the laws of the United States or a state of the United States.

As used in this Section 15, “BHC Act Affiliate” has the meaning assigned to the term “affiliate” in, and shall be interpreted in accordance with, 12 U.S.C. § 1841(k); “Covered Entity” means any of the following: (i) a “covered entity” as that term is defined in, and interpreted in accordance with, 12 C.F.R. § 252.82(b), (ii) a “covered bank” as that term is defined in, and interpreted in accordance with, 12 C.F.R. § 47.3(b) or (iii) a “covered FSI” as that term is defined in, and interpreted in accordance with, 12 C.F.R. § 382.2(b); “Default Right” has the meaning assigned to that term in, and shall be interpreted in accordance with, 12 C.F.R. §§ 252.81, 47.2 or 382.1, as applicable; and “U.S. Special Resolution Regime” means each of (i) the Federal Deposit Insurance Act and the regulations promulgated thereunder and (ii) Title II of the Dodd-Frank Wall Street Reform and Consumer Protection Act and the regulations promulgated thereunder.

16.    No Fiduciary Duty. The Company hereby acknowledges that (a) the purchase and sale of the Securities pursuant to this Agreement is an arm’s-length commercial transaction between the Company, on the one hand, and the Underwriters and any Affiliate through which it may be acting, on the other, (b) the Underwriters are acting as principal and not as an agent or fiduciary of the Company and (c) the engagement of the Underwriters by the Company in connection with the offering and the process leading up to the offering is as independent contractors and not in any other capacity. Furthermore, the Company agrees that they are solely responsible for making their own judgments in connection with the offering (irrespective of whether any of the Underwriters has advised or is currently advising the Company on related or other matters). The Company agrees that it will not claim that the Underwriters have rendered advisory services of any nature or respect, or owe an agency, fiduciary or similar duty to them, in connection with such transaction or the process leading thereto.

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17.    Integration. This Agreement supersedes all prior agreements and understandings (whether written or oral) between the Company and the Underwriters, or any of them, with respect to the subject matter hereof.

18.    Applicable Law. This Agreement will be governed by and construed in accordance with the laws of the State of New York applicable to contracts made and to be performed within the State of New York.

19.    Waiver of Jury Trial. The Company and the Underwriters hereby irrevocably waive, to the fullest extent permitted by applicable law, any and all right to trial by jury in any legal proceeding arising out of or relating to this Agreement or the transactions contemplated hereby.

20.    Counterparts. This Agreement may be signed in one or more counterparts (including in electronic format), each of which shall constitute an original and all of which together shall constitute one and the same agreement.

21.    Headings. The section headings used herein are for convenience only and shall not affect the construction hereof.

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If the foregoing is in accordance with your understanding of our agreement, please sign and return to us the enclosed duplicate hereof, whereupon this letter and your acceptance shall represent a binding agreement among the Company and the several Underwriters.

Very truly yours, InterXion Holding N.V.
By:	/s/ David C. Ruberg
Name:	David C. Ruberg
Title:	Chief Executive Officer/proxyholder
By:	/s/ Jean Mandeville
Name:	Jean Mandeville
Title:	Chairman/proxyholder

[Signature Page to Underwriting Agreement]

The foregoing Agreement is hereby

confirmed and accepted as of the date

specified in Schedule I hereto.

Citigroup Global Markets Inc.

Barclays Capital Inc.

BofA Securities, Inc.

Guggenheim Securities, LLC

By:	Citigroup Global Markets Inc.
By:	/s/ Alexander Ramirez
Name:	Alexander Ramirez
Title:	Managing Director
By:	Barclays Capital Inc.
By:	/s/ Victoria Hale
Name:	Victoria Hale
Title:	Vice President
By:	BofA Securities, Inc.
By:	/s/ Magdalena Heinrich
Name:	Magdalena Heinrich
Title:	Managing Director
By:	Guggenheim Securities, LLC
By:	/s/ Harris A. Decker
Name:	Harris A. Decker
Title:	Senior Managing Director

For themselves and the other several

Underwriters named in Schedule II to

the foregoing Agreement.

[Signature Page to Underwriting Agreement]

SCHEDULE I

Underwriting Agreement dated June 26, 2019

Registration Statement No. 333-232331

Representatives:

Citigroup Global Markets Inc.

Barclays Capital Inc.

BofA Securities, Inc.

Guggenheim Securities, LLC

Title, Purchase Price and Description of Securities:

Title: Ordinary shares, nominal value €0.10 per share

Number of Underwritten Securities to be issued and sold by the Company: 4,000,000

Maximum Number of Option Securities to be issued and sold by the Company: 600,000

Price per Ordinary Share to Public: $72.75

Price per Ordinary Share to the Underwriters: $69.84

Closing Date, Time and Location: July 1, 2019 at 10:00 a.m. New York City time at Shearman & Sterling (London) LLP, 9 Appold Street, London EC2A 2AP, United Kingdom

Date referred to in Section 5(g) after which the Company may offer or sell securities issued by the Company without the consent of the Representative(s): August 25, 2019

I-1

SCHEDULE II

Underwriters	Number of Underwritten Securities to be Purchased
Citigroup Global Markets Inc.		1,120,000
Barclays Capital Inc.		900,000
BofA Securities, Inc.		900,000
Guggenheim Securities, LLC.		720,000
ABN AMRO Securities (USA) LLC		360,000
Total		4,000,000

II-1

SCHEDULE III

III – A

Schedule of Free Writing Prospectuses included in the Disclosure Package

None

III – B

Pricing Terms

1. The Company is selling 4,000,000 Ordinary Shares.

2. The Company has granted an option to the Underwriters, severally and not jointly, to purchase up to an additional 600,000 Ordinary Shares.

3. The public offering price per share for the Securities shall be $72.75.

III-1

SCHEDULE IV

David C. Ruberg

John Doherty

Jean F.H.P. Mandeville

Frank Esser

Mark Heraghty

David Lister

Rob Ruijter

IV-1

EX-5.1

Exhibit 5.1

	POSTAL ADDRESS	P.O. Box 71170 1008 BD AMSTERDAM
	OFFICE ADDRESS	Fred. Roeskestraat 100 1076 ED AMSTERDAM The Netherlands
	INTERNET	www.loyensloeff.com

To:

InterXion Holding N.V.

Scorpius 30

2132 LR HOOFDDORP

The Netherlands

REFERENCE

RE Dutch law legal opinion – InterXion Holding N.V. – Offering of 4,600,000 Ordinary Shares

Amsterdam, 1 July 2019

Dear Sir, Madam,

1 INTRODUCTION

We have acted as special counsel on certain matters of Dutch law to the Company, in connection with, among others things, the preparation and filing of the Final Prospectus Supplement relating to the offering of the Shares. The Final Prospectus relates to the Registration Statement filed by the Company with the SEC on 25 June 2019, relating to the registration of the offer and sale of ordinary shares, with a nominal value of EUR 0.10 each, in the capital of the Company.

2 DEFINITIONS

2.1 Capitalised terms used but not (otherwise) defined herein are used as defined in the Schedules to this opinion letter.

2.2 In this opinion letter:

Company means InterXion Holding N.V., registered with the Trade Register under number 33301892.

Resolutions means the Board Resolution and the Shareholders’ Resolution.

SEC means the United States Securities and Exchange Commission.

Securities Act means the United States of America’s Securities Act of 1933, as amended from time to time.

The public limited company Loyens & Loeff N.V. is established in Rotterdam and is registered with the Trade Register of the Chamber of Commerce and Industry under number 24370566. Solely Loyens & Loeff N.V. shall operate as contracting agent. All its services shall be governed by its General Terms and Conditions, including, inter alia, a limitation of liability and a nomination of competent jurisdiction. These General Terms and Conditions have been printed on the reverse side of this page and may also be consulted via www.loyensloeff.com. The conditions were deposited with the Registry of the Rotterdam District Court on 1 July 2009 under number 43/2009.

AMSTERDAM        •         ARNHEM         •         BRUSSELS         •         EINDHOVEN         •         LUXEMBOURG         •         ROTTERDAM         •         ARUBA

CURACAO     •     DUBAI     •     GENEVA    •     HONG KONG     •     LONDON     •     NEW YORK     •     PARIS     •     SINGAPORE     •     TOKYO    •     ZURICH

Shares means the 4,600,000 ordinary shares, with a nominal value of EUR 0.10 each, in the capital of the Company, issued pursuant to the Deed of Issuance.

Trade Register means the trade register of the Chamber of Commerce in the Netherlands.

3 SCOPE OF INQUIRY

3.1 For the purpose of rendering this opinion letter, we have only examined and relied upon transmitted copies of the following documents (the Reviewed Documents):

(a) an excerpt of the registration of the Company in the Trade Register dated 15 June 2018 (the Excerpt I);

(b) an excerpt of the registration of the Company in the Trade Register dated 6 June 2019 (the Excerpt II);

(c) an excerpt of the registration of the Company in the Trade Register dated 28 June 2019 (the Excerpt III);

(d) the deed of incorporation, including the articles of association (statuten) of the Company (the Articles) dated 6 April 1998 (the Deed of Incorporation);

(e) the deed of conversion (akte van omzetting) and amendment to the articles of association (wijziging statuten) of the Company dated 11 January 2000 (the Deed of Conversion);

(f) the articles of association (statuten) of the Company dated 20 January 2012 (the Articles);

(g) the extract of the minutes of the meeting of the board of managing directors of the Company dated 11 June 2019 (the Board Resolution) and including a power of attorney to Mr. J.F.H.P. Mandeville and Mr. D.C. Ruberg, acting jointly (the Power of Attorney);

(h) the resolution of the general meeting of the Company dated 29 June 2018 (the Shareholders’ Resolution);

(i) the registration statement relating to the shares in the capital of the Company on Form F-3 dated 25 June 2019 filed by the Company with the SEC under the Securities Act (the Registration Statement);

(j) a preliminary prospectus supplement relating to the Shares dated 25 June 2019 filed by the Company with the SEC under the Securities Act (the Preliminary Prospectus Supplement);

(k) a final prospectus supplement relating to the Shares dated 26 June 2019 filed by the Company with the SEC under the Securities Act (the Final Prospectus Supplement);

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(l) the report on Form 6-K dated 1 July 2019 filed by the Company with the SEC under the Securities Act (the Report on Form 6-K);

(m) a Dutch law private deed of issuance of shares dated 1 July 2019 relating to the issuance of the Shares (the Deed of Issuance); and

(n) the shareholders’ register (aandeelhoudersregister) of the Company (the Shareholders’ Register).

3.2 We have undertaken only the following searches and inquiries (the Checks) at the date of this opinion letter:

(a) an inquiry by telephone at the Trade Register, confirming that no changes were registered after the date of the Excerpt;

(b) an online inquiry on the relevant website (www.kvk.nl) of the Chamber of Commerce in the Netherlands, confirming that no civil law director disqualification has been imposed on a member of the board of the Company;

(c) an online inquiry on the relevant website (www.rechtspraak.nl) of the EU Registrations with the Central Insolvency Register (Centraal Insolventie Register) confirming that the Company is not listed on the EU Registrations with the Central Insolvency Register; and

(d) an online inquiry on the relevant website (http://eur-lex.europa.eu/) of the list referred to in article 2 (3) of Council regulation (EC) No 2580/2001, Annex I of Council regulation (EC) No 881/2002 and the Annex to Council Common Position 2001/931 relating to measures to combat terrorism, all as amended from time to time, confirming that the Company is not listed on such annexes.

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3.3 We have not reviewed any documents incorporated by reference or referred to in the Reviewed Documents (unless included as an Reviewed Document) and therefore our opinions do not extend to such documents.

4 NATURE OF OPINION

4.1 We only express an opinion on matters of Dutch law and the law of the European Union, to the extent directly applicable in the Netherlands, in force on the date of this opinion letter, excluding unpublished case law, all as interpreted by Dutch courts and the European Court of Justice. We do not express an opinion on tax law, competition law, sanction laws and financial assistance. The terms “the Netherlands” and “Dutch” in this opinion letter refer solely to the European part of the Kingdom of the Netherlands.

4.2 Our opinion is strictly limited to the matters stated herein. We do not express any opinion on matters of fact, on the commercial and other non-legal aspects of the transactions contemplated by the Deed of Issuance and on any representations, warranties or other information included in the Deed of Issuance and any other document examined in connection with this opinion letter, except as expressly stated in this opinion letter.

4.3 In this opinion letter Dutch legal concepts are sometimes expressed in English terms and not in their original Dutch terms. The concepts concerned may not be identical to the concepts described by the same English term as they exist under the laws of other jurisdictions. For the purpose of tax law a term may have a different meaning than for the purpose of other areas of Dutch law.

4.4 This opinion letter may only be relied upon under the express condition that any issue of interpretation or liability arising hereunder will be governed by Dutch law and be brought exclusively before the competent court in Rotterdam, the Netherlands.

4.5 This opinion letter is issued by Loyens & Loeff N.V. and may only be relied upon under the express condition that any liability of Loyens & Loeff N.V. is limited to the amount paid out under its professional liability insurance policies. Individuals or legal entities that are involved in the services provided by or on behalf of Loyens & Loeff N.V. cannot be held liable in any manner whatsoever.

5 OPINIONS

The opinions expressed in this paragraph 5 (Opinions) should be read in conjunction with the assumptions set out in Schedule 1 (Assumptions) and the qualifications set out in Schedule 2 (Qualifications). On the basis of these assumptions and subject to these qualifications and any factual matters or information not disclosed to us in the course of our investigation, we are of the opinion that as at the date of this opinion letter:

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5.1 Corporate status

The Company has been duly incorporated as a besloten vennootschap met beperkte aansprakelijkheid (private limited liability company) under Dutch law and is validly existing as a naamloze vennootschap (public limited liability company) under Dutch law.

5.2 Share capital

The Shares have been duly authorised, validly issued and fully paid up and are non-assessable.

6 ADDRESSEES

6.1 This opinion letter is addressed to you in relation to and as an exhibit to the Report on Form 6-K filed by the Company with the SEC on the date hereof and incorporated by reference into the Registration Statement and may not be disclosed to and relied upon by any other person without our prior written consent other than as an exhibit to the Report on Form 6-K filed by the Company with the SEC on the date hereof and incorporated by reference into the Registration Statement. This opinion letter is not to be used or relied upon for any purpose other than in connection with the filing of the Report on Form 6-K by the Company with the SEC on the date hereof and incorporated by reference into the Registration Statement.

6.2 We hereby consent to the filing of this opinion letter as an exhibit to the Report on Form 6-K filed by the Company with the SEC on the date hereof and incorporated by reference into the Registration Statement and to the references to Loyens & Loeff N.V. under the heading “Legal Matters” in the Preliminary Prospectus Supplement, the Final Prospectus Supplement and the Registration Statement. In giving the consent set out in the previous sentence, we do not thereby admit or imply that we are in the category of persons whose consent is required under Section 7 of the Securities Act or any rules and regulations of the SEC promulgated thereunder.

Yours faithfully,

/s/ Loyens & Loeff N.V.

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Schedule 1

ASSUMPTIONS

The opinions in this opinion letter are subject to the following assumptions:

1 Documents

1.1 All signatures are genuine, all original documents are authentic and all copies are complete and conform to the originals.

1.2 The information recorded in the Excerpt I was true, accurate and complete on the date of the Shareholder Resolution.

1.3 The information recorded in the Excerpt II was true, accurate and complete on the date of the Board Resolution.

1.4 The information recorded in the Excerpt III is true, accurate and complete on the date of the Deed of Issuance and of this opinion letter (although not constituting conclusive evidence thereof, this assumption is supported by the Checks).

1.5 The information recorded in the Shareholders’ Register is true, accurate and complete on the date of this opinion letter

2 Incorporation, existence and corporate power

2.1 The Deed of Incorporation is a valid notarial deed (notariële authentieke akte), the contents thereof are correct and complete and there were no defects in the incorporation process (not appearing on the face of the Deed of Incorporation) for which a court might dissolve the Company.

2.2 The Deed of Conversion is a valid notarial deed (notariële authentieke akte), the contents thereof are correct and complete and there were no defects in the conversion process (not appearing on the face of the Deed of Conversion) for which a court might dissolve the Company.

2.3 The Company has not been dissolved, merged involving the Company as disappearing entity, demerged, converted, subjected to an intervention, recovery or resolution measure, granted a suspension of payments, declared bankrupt or subjected to any other insolvency proceedings listed in Annex A of Regulation (EU) 2015/848 of the European Parliament and of the Council of 20 May 2015 on insolvency proceedings (recast), listed on the list referred to in article 2 (3) of Council Regulation (EC) No 2580/2001 of 27 December 2001, listed in Annex I to Council Regulation (EC) No 881/2002 of 27 May 2002 or listed and marked with an asterisk in the Annex to Council Common Position 2001/931 of 27 December 2001 relating to measures to combat terrorism, as amended from time to time (although not constituting conclusive evidence thereof, this assumption is supported by the contents of the Excerpt III and the Checks).

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2.4 The Articles are the articles of association (statuten) of the Company in force on the date of the Deed of Issuance and of this opinion letter (although not constituting conclusive evidence thereof, this assumption is supported by the contents of the Excerpt III).

3 Corporate authorisations

3.1 The Resolutions (a) correctly reflect the resolutions made by the relevant corporate body of the Company in respect of the transactions contemplated by the Deed of Issuance, (b) have been made with due observance of the Articles and any applicable by-laws and (c) are in full force and effect.

3.2 No member of the board of managing directors of the Company has a direct or indirect personal interest which conflicts with the interest of the Company or its business in respect of the entering into the Deed of Issuance (although not constituting conclusive evidence thereof, this assumption is supported by the contents of the Board Resolution).

3.3 The consent, approval or authorisation of any person and any other step or formality which is required in relation to the execution of the Deed of Issuance and the performance and observance of the terms thereof by the parties, as listed in the Deed of Issuance, has been obtained.

3.4 Except for the Shares, no shares in the capital of the Company or rights for shares in the capital of the Company have been issued by the Company on the basis of the authorisation granted to the board of managing directors of the Company, pursuant to the Shareholders’ Resolution, to issue shares or grant rights to subscribe for shares representing up to ten (10) percent of the Company’s issued share capital for general corporate purposes.

3.5 The Company has not and will not have established, has not and will not have been requested to establish, nor is or will be in the process of establishing any works council (ondernemingsraad) and there is and will be no works council, which has jurisdiction over the transactions contemplated by the Deed of Issuance.

4 Other parties

4.1 Each party to the Deed of Issuance, other than the Company, is validly existing under the laws by which it is purported to be governed.

4.2 Each party to the Deed of Issuance, other than the Company, has all requisite power or capacity (corporate and otherwise) to execute, and to perform its obligations under the Deed of Issuance and the Deed of Issuance has been duly authorised, executed and delivered by or on behalf of the parties thereto other than the Company.

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5 Validity

Under any applicable laws (other than Dutch law):

(a) the Deed of Issuance constitutes the legal, valid and binding obligations of the parties thereto, and is enforceable against those parties in accordance with their terms; and

(b) the choice of law and submission to jurisdiction made in the Deed of Issuance is valid and binding.

6 Share capital

6.1 The Shares have been issued upon payment of at least the nominal value on each Share.

6.2 The Shares have been validly accepted by Cede & Co. or the broker on its behalf (as the case may be).

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Schedule 2

QUALIFICATIONS

The opinions in this opinion letter are subject to the following qualifications:

1 Insolvency

The opinions expressed herein may be affected or limited by the provisions of any applicable bankruptcy, suspension of payments, any intervention, recovery or resolution measure, other insolvency proceedings and fraudulent conveyance (actio Pauliana) and other laws of general application now or hereafter in effect, relating to or affecting the enforcement or protection of creditors’ rights.

2 Enforceability

2.1 The opinions expressed herein, with respect to the Deed of Issuance, may be affected by the availability of general defences under Dutch law such as the principles of reasonableness and fairness, modification on grounds of unforeseen circumstances, duress, deceit, mistake, undue influence and, if and to the extent not validly waived, force majeure, the right to suspend performance as long as the other party is in default in respect of its obligations, the right to set-off and the right to dissolve a transaction upon default by the other party.

2.2 A Dutch legal entity may invoke the nullity of a transaction if the transaction does not fall within the objects of such legal entity and the other parties to the transaction knew, or without independent investigation, should have known, that such objects were exceeded. In determining whether a transaction falls within the objects of a legal entity all relevant circumstances should be taken into account, including the wording of the objects clause of the articles of association and the level of (direct or indirect) benefit derived by the legal entity.

3 Non-assessable

Non-assessable has no equivalent legal term under Dutch law, but is interpreted to express that the shareholders cannot be required to make any further payments on their fully paid-up shares.

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EX-99.1

Exhibit 99.1

Press Release, June 26, 2019

InterXion Holding N.V. Announces Pricing of Offering of Ordinary Shares

Amsterdam, The Netherlands — June 26, 2019 - InterXion Holding N.V. (“InterXion”, “we, “us”, or the “Company”) (NYSE: INXN) today announced that it priced its previously announced public offering of 4,000,000 ordinary shares at a public offering price of $72.75 per share. In addition, the Company granted the underwriters a 30-day option to purchase up to an additional 600,000 ordinary shares at the public offering price, less the underwriting discounts and commissions. The gross proceeds of this offering, before deducting the underwriting discounts and commissions and offering expenses, are expected to be $291 million. The offering is expected to close on or about July 1, 2019, subject to customary closing conditions.

The Company intends to use the net proceeds from this offering for general corporate purposes, including funding for land bank development and its currently planned and future data center capacity expansion projects, working capital needs and the repayment of short-term indebtedness.

Citigroup, Barclays, BofA Merrill Lynch and Guggenheim Securities are serving as joint book-running managers and ABN AMRO is serving as co-manager for the proposed offering.

The offering is being made pursuant to the Company’s shelf registration statement on Form F-3 filed with the U.S. Securities and Exchange Commission (the “SEC”) on June 25, 2019 (the “Registration Statement”). The ordinary shares are being offered only by means of a prospectus and an accompanying prospectus supplement forming a part of the effective Registration Statement. Prospective investors should read the prospectus included in the Registration Statement, the final prospectus supplement and other documents that the Company has filed with the SEC for more complete information about the Company and the offering. The Registration Statement, the final prospectus supplement and the documents incorporated by reference therein are available on the SEC’s website at: http://www.sec.gov.

When available, copies of the final prospectus supplement and the accompanying prospectus may be obtained from Citigroup Global Markets Inc., c/o Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, NY 11717, toll-free: (800) 831-9146; or Barclays Capital Inc., c/o Broadridge Financial Solutions, 1155, Long Island Avenue, Edgewood, NY 11717, by calling (888) 603-5847 or by emailing Barclaysprospectus@broadridge.com; or BofA Merrill Lynch, Attn: Prospectus Department, NC1-004-03-43, 200 North College Street, 3rd Floor, Charlotte, NC 28255-0001 or via email at: dg.prospectus_requests@baml.com.

This news release shall not constitute an offer to sell or the solicitation of an offer to buy these securities, nor shall there be any sale of these securities in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state.

Neither the content of InterXion’s website nor any website accessible by hyperlinks on InterXion’s website is incorporated in, or forms part of, this announcement. The distribution of this announcement into certain jurisdictions may be restricted by law. Persons into whose possession this announcement comes should inform themselves about and observe any such restrictions. Any failure to comply with these restrictions may constitute a violation of the securities laws of any such jurisdiction.

Forward-looking Statements

This press release contains “forward-looking statements,” as the phrase is defined in Section 27A of the U.S. Securities Act of 1933, as amended, and Section 21E of the U.S. Securities Exchange Act of 1934, as amended. The words “expect,” “will,” “intend” and similar words are intended to identify estimates and forward-looking statements. Forward-looking statements are not historical facts, and include statements relating to, among other things, the completion of the transaction described above. Actual results may differ materially from expectations discussed in such forward-looking statements. Factors that might cause such differences include, but are not limited to, the difficulty of reducing operating expenses in the short term, inability to utilise the capacity of newly planned data centres and data centre expansions, significant competition, the cost and supply of electrical

power, data centre industry over-capacity, performance under service-level agreements, and other risks described from time to time in InterXion’s filings with the SEC. InterXion does not assume any obligation to update the forward-looking information contained in this press release.

About Interxion

InterXion (NYSE: INXN) is a leading provider of carrier and cloud-neutral colocation data centre services in Europe, serving a wide range of customers through 52 data centres in 11 European countries. InterXion’s uniformly designed, energy efficient data centres offer customers extensive security and uptime for their mission-critical applications. With over 700 connectivity providers, 21 European Internet exchanges, and most leading cloud and digital media platforms across its footprint, InterXion has created connectivity, cloud, content and finance hubs that foster growing customer communities of interest. For more information, please visit www.interxion.com.

Contact:

Jim Huseby

Investor Relations

InterXion

Tel: +1-813-644-9399

IR@interxion.com