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 9 May 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.

This report contains Interxion Holding N.V.’s (1) first quarter 2019 earnings press release and (2) presentation materials to be used during a conference call with investors on 9 May 2019.

Exhibit
99.1	The press release “Interxion Reports First Quarter 2019 Results”, dated 9 May 2019.
99.2	Presentation materials to be used during a conference call with investors on 9 May 2019.

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

Date: 9 May 2019

EX-99.1

Exhibit 99.1

Press Release, 9 May 2019

Interxion Reports First Quarter 2019 Results

Revenue Increased 13% Year Over Year

AMSTERDAM 9 May 2019 – Interxion Holding NV (NYSE: INXN), a leading European provider of carrier and cloud-neutral colocation data centre services, today announced its results for the three-month period ended 31 March 2019.

Financial Highlights

• Revenue increased by 13% to €151.5 million (1Q 2018: €133.8 million).

• Recurring revenue¹ increased by 14% to €145.3 million (1Q 2018: €127.0 million).

• Net income decreased by 28% to €8.4 million (1Q 2018: €11.7 million).

• Adjusted net income² decreased by 41% to €7.0 million (1Q 2018: €11.9 million).

• Diluted earnings per share decreased by 28% to €0.12 (1Q 2018: €0.16).

• Adjusted diluted earnings per share² decreased by 41% to €0.10 (1Q 2018: €0.17).

• Adjusted EBITDA² increased by 27% to €77.3 million (1Q 2018: €60.9 million).

• Adjusted EBITDA margin increased to 51.0% (1Q 2018: 45.5%).

• Adjusted EBITDA excluding the impact of IFRS 16² increased by 14% to €69.3 million (1Q 2018: €60.9 million) and Adjusted EBITDA margin increased to 45.7% (1Q 2018: 45.5%).

• Capital expenditures, including intangible assets³, were €144.1 million (1Q 2018: €96.2 million).

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Operating Highlights

• Equipped space increased by 3,500 square metres during the quarter to 148,300 square metres.

• Revenue generating space increased by 4,000 square metres during the quarter to 119,000 square metres.

• Utilisation rate at the end of the quarter was 80%.

• During the first quarter, Interxion completed the following capacity additions:

• 2,600 sqm in Frankfurt;

• 300 sqm in London; and

• 300 sqm in Dusseldorf.

• In April, Interxion acquired a 40% equity interest in Icolo Ltd., a Kenyan data centre operator.

“Interxion continues to experience strong demand in Europe, with the cloud and content platforms continuing to expand across our pan-European footprint, driving 14% recurring revenue growth in the first quarter and providing support for our ongoing expansion program,” said David Ruberg, Interxion’s Chief Executive Officer. “Interxion’s highly-connected data centres and value-enhancing communities of interest continue to attract mission-critical and latency sensitive applications, contributing to sustainable attractive returns for our shareholders.”

Quarterly Review

The implementation of International Financial Reporting Standard - Leases (“IFRS 16”) on January 1, 2019 had a significant impact on our reported numbers as of and for the three-month period ended 31 March 2019. While IFRS 16 had no impact on our underlying cash flows, the new accounting treatment applicable to operating leases resulted in a reduction in our

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reported rent expense, which had a positive impact on reported gross profit and Adjusted EBITDA. IFRS 16 also resulted in an increase in depreciation and interest charges, which had a negative impact on net income and earnings per share. In addition, the new accounting treatment under IFRS 16 impacted our balance sheet, resulting in an increase in reported liabilities, together with a corresponding increase in right of use assets, in each case, as a result of including both future lease liabilities and right of use assets on balance sheet.

Revenue in the first quarter of 2019 was €151.5 million, a 13% increase over the first quarter of 2018 and a 3% increase over the fourth quarter of 2018. Recurring revenue was €145.3 million, a 14% increase over the first quarter of 2018 and a 4% increase over the fourth quarter of 2018. Recurring revenue in the first quarter represented 96% of total revenue. On a constant currency⁴ basis, revenue in the first quarter of 2019 was 13% higher than in the first quarter of 2018. Neither foreign exchange movements nor the adoption of IFRS 16 had a meaningful impact on reported revenue in the first quarter of 2019.

Cost of sales in the first quarter of 2019 was €50.4 million, a 4% decrease over the first quarter of 2018 and a 12% decrease over the fourth quarter of 2018.

Gross profit was €101.1 million in the first quarter of 2019, a 25% increase over the first quarter of 2018 and a 13% increase over the fourth quarter of 2018. Gross profit margin was 66.7% in the first quarter of 2019, compared with 60.6% in the first quarter of 2018 and 61.1% in the fourth quarter of 2018.

Sales and marketing costs in the first quarter of 2019 were €9.2 million, a 5% increase over the first quarter of 2018 and a 3% decrease from the fourth quarter of 2018.

General and administrative costs, excluding the items we adjust for in the determination of Adjusted EBITDA, were €14.7 million in the first quarter of 2019, a 27% increase over the first quarter of 2018 and an 18% increase from the fourth quarter of 2018.

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Depreciation and amortisation in the first quarter of 2019 were €41.7 million, an increase of 41% from the first quarter of 2018 and a 21% increase from the fourth quarter of 2018.

Operating income in the first quarter of 2019 was €29.8 million, an increase of 11% from the first quarter of 2018 and a 4% decrease from the fourth quarter of 2018.

Net finance expense for the first quarter of 2019 was €16.7 million, a 46% increase over the first quarter of 2018 and a 6% increase over the fourth quarter of 2018.

Income tax expense for the first quarter of 2019 was €4.8 million, a 25% increase compared with the first quarter of 2018 and a 34% decrease from the fourth quarter of 2018.

Net income was €8.4 million in the first quarter of 2019, a 28% decrease over the first quarter of 2018 and a 5% increase from the fourth quarter of 2018.

Adjusted net income was €7.0 million in the first quarter of 2019, a 41% decrease over the first quarter of 2018 and a 10% decrease from the fourth quarter of 2018.

Adjusted EBITDA for the first quarter of 2019 was €77.3 million, a 27% increase over the first quarter of 2018 and a 14% increase over the fourth quarter of 2018. Adjusted EBITDA margin was 51.0% in the first quarter of 2019 compared with 45.5% in the first quarter of 2018 and 46.1% in the fourth quarter of 2018.

Adjusted EBITDA excluding the effects of IFRS 16, was €69.3 million for the first quarter of 2019, a 14% increase over the first quarter of 2018 and a 2% increase over the fourth quarter of 2018. Adjusted EBITDA margin, excluding the effects of IFRS 16, was 45.7% in the first quarter of 2019, compared with 45.5% in the first quarter of 2018 and 46.1% in the fourth quarter of 2018.

Net cash flows from operating activities were €71.3 million in the first quarter of 2019, compared with €34.6 million in the first quarter of 2018 and €44.8 million in the fourth quarter of 2018.

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Cash generated from operations⁵ was €79.9 million in the first quarter of 2019, compared with €58.1 million in the first quarter of 2018 and €76.9 million in the fourth quarter of 2018.

Capital expenditures, including intangible assets, were €144.1 million in the first quarter of 2019, compared with €96.2 million in the first quarter of 2018 and €131.3 million in the fourth quarter of 2018.

Cash and cash equivalents were €118.2 million at 31 March 2019, compared with €186.1 million at year end 2018.

Total borrowings (including lease liabilities) net of cash and cash equivalents were €1,593.9 million in aggregate at 31 March 2019, compared with €1,104.1 million at 31 December 2018. Excluding lease liabilities, total borrowings were €1,239.6 million at 31 March 2019, compared with €1,239.8 million at 31 December 2018.

During the first quarter of 2019, Interxion increased its unsecured revolving credit facility by €100 million for a total commitment of €300 million. As at 31 March 2019, no amounts had been drawn under this facility.

Equipped space at the end of the first quarter of 2019 was 148,300 square metres, compared to 128,900 square metres at the end of the first quarter of 2018 and 144,800 square metres at the end of the fourth quarter of 2018. Revenue generating space at the end of the first quarter of 2019 was 119,000 square metres, compared to 104,100 square metres at the end of the first quarter of 2018 and 115,000 square metres at the end of the fourth quarter of 2018. Utilisation rate, the ratio of revenue-generating space to equipped space, was 80% at the end of the first quarter of 2019, compared to 81% at the end of the first quarter of 2018 and 79% at the end of the fourth quarter of 2018.

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Business Outlook

Interxion today is reaffirming guidance for Revenue, Adjusted EBITDA and Capital expenditures (including intangibles) for full year 2019:

Revenue	€632 million – €647 million
Adjusted EBITDA	€324 million – €334 million
Capital expenditures (including intangibles)	€570 million – €600 million

Conference Call to Discuss Results

Interxion will host a conference call today at 8:30 a.m. ET (1:30 p.m. BST, 2:30 p.m. CET) to discuss the results.

To participate on this call, U.S. callers may dial toll free 1-866-966-1396; callers outside the U.S. may dial direct +44 (0) 2071 928 000. The conference ID for this call is INXN. This event also will be webcast live over the Internet in listen-only mode at investors.interxion.com.

A replay of this call will be available shortly after the call concludes and will be available until 23 May 2019. To access the replay, U.S. callers may dial toll free 1-866-331-1332; callers outside the U.S. may dial direct +44 (0) 3333 009 785. The replay access number is 7667705.

Forward-looking Statements

This communication contains forward-looking statements that involve risks and uncertainties. There can be no assurance that such statements will prove to be accurate and actual results and future events could differ materially from those anticipated in such forward-looking statements. Factors that could cause actual results and future events to differ materially from Interxion’s expectations include, but are not limited to, the difficulty of reducing operating expenses in the short term, the 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, delays in remediating the material weakness in internal control over financial reporting and/or making disclosure controls and procedures effective, certain other risks detailed herein and other risks described from time to time in Interxion’s filings with the United States Securities and Exchange Commission (the “SEC”).

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Interxion does not assume any obligation to update the forward-looking information contained in this press release.

Non-IFRS Financial Measures

Included in these materials are certain non-IFRS financial measures, which are measures of our financial performance that are not calculated and presented in accordance with IFRS, within the meaning of applicable SEC rules. These measures are as follows: (i) Adjusted EBITDA; (ii) Adjusted EBITDA excluding the impact of IFRS 16; (iii) Recurring revenue; (iv) Revenue on a constant currency basis; (v) Adjusted net income; (vi) Adjusted basic earnings per share; (vii) Adjusted diluted earnings per share and (viii) Cash generated from operations.

Other companies may present Adjusted EBITDA, Adjusted EBITDA excluding the impact of IFRS 16, Recurring revenue, Revenue on a constant currency basis, Adjusted net income, Adjusted basic earnings per share, Adjusted diluted earnings per share and Cash generated from operations differently than we do. Each of these measures are not measures of financial performance under IFRS and should not be considered as an alternative to operating income or as a measure of liquidity or an alternative to Profit for the period attributable to shareholders (“net income”) as indicators of our operating performance or any other measure of performance implemented in accordance with IFRS.

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Adjusted EBITDA, Adjusted EBITDA excluding the impact of IFRS 16, Recurring revenue and Revenue on a constant currency basis

We define Adjusted EBITDA as Operating income adjusted for the following items, which may occur in any period, and which management believes are not representative of our operating performance:

• Depreciation and amortisation – property, plant and equipment and intangible assets (except goodwill) are depreciated and amortised on a straight-line basis over the estimated useful life. We believe that these costs do not represent our operating performance.

• Share-based payments – represents primarily the fair value at the date of grant of employee equity awards, which is recognized as an expense over the vesting period. In certain cases, the fair value is redetermined for market conditions at each reporting date, until the final date of grant is achieved. We believe that this expense does not represent our operating performance.

• Income or expense related to the evaluation and execution of potential mergers or acquisitions (“M&A”) – under IFRS, gains and losses associated with M&A activity are recognised in the period in which such gains or losses are incurred. We exclude these effects because we believe they are not reflective of our ongoing operating performance.

• Adjustments related to terminated and unused data centre sites – these gains and losses relate to historical leases entered into for certain brownfield sites, with the intention of developing data centres, which were never developed and for which management has no intention of developing into data centres. We believe the impact of gains and losses related to unused data centres are not reflective of our business activities and our ongoing operating performance.

In certain circumstances, we may also adjust for other items that management believes are not representative of our current ongoing performance. Examples include: adjustments for the cumulative effect of a change in accounting principle or estimate, impairment losses, litigation gains and losses or windfall gains and losses.

In addition, we present Adjusted EBITDA excluding the impact of IFRS 16 for comparative purposes with regard to Adjusted EBITDA presented in periods prior to 1 January 2019, the effective date of IFRS 16.

We define Recurring revenue as revenue incurred from colocation and associated power charges, office space, amortised set-up fees, cross-connects and certain recurring managed services (but excluding any ad hoc managed services) provided by us directly or through third parties, excluding rents received for the sublease of unused sites.

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We believe Adjusted EBITDA, Adjusted EBITDA excluding the impact of IFRS 16, Recurring revenue and Revenue on a constant currency basis provide useful supplemental information to investors regarding our ongoing operational performance. These measures help us and our investors evaluate the ongoing operating performance of the business after removing the impact of our capital structure (primarily interest expense), our asset base (primarily depreciation and amortisation) and the implementation of new accounting standards. Management believes that the presentation of Adjusted EBITDA and Adjusted EBITDA excluding the impact of IFRS 16, when combined with the primary IFRS presentation of net income, provides a more complete analysis of our operating performance. Management also believes the use of Adjusted EBITDA and Adjusted EBITDA excluding the impact of IFRS 16 facilitates comparisons between us and other data centre operators (including other data centre operators that are REITs) and other infrastructure-based businesses. Adjusted EBITDA excluding the impact of IFRS 16 is also a relevant measure used in the financial covenants of our revolving credit facility and our 4.75% Senior Notes due 2025. Pursuant to the terms of our revolving credit facility and our 4.75% Senior Notes due 2025, the calculation of Adjusted EBITDA for the purposes of the financial covenants contained therein is determined in accordance with IFRS as of the date of the financing agreements related thereto (June 2018) and therefore does not include the impact of IFRS 16.

A reconciliation from net income to Adjusted EBITDA and from Adjusted EBITDA to Adjusted EBITDA excluding the impact of IFRS 16 is provided in the tables attached to this press release. Adjusted EBITDA, Adjusted EBITDA excluding the impact of IFRS 16 and other key performance indicators may not be indicative of our historical results of operations based on IFRS, nor are they meant to be predictive of future results under IFRS.

Management’s outlook for 2019 included in this press release includes a range for expected Adjusted EBITDA, a non-IFRS financial measure, which excludes items that management believes are not representative of our operating performance. These items include, but are not limited to, depreciation and amortisation, share-based payments, income or expense related to the evaluation and execution of potential mergers or acquisitions, adjustments related to terminated and unused data centre

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sites, and other significant items that currently cannot be predicted. The exact amount of these items is an estimate but may be significant. Accordingly, the company is unable to provide equivalent reconciliations from the corresponding forward-looking IFRS measures to expected Adjusted EBITDA.

We present constant currency information for revenue to provide a framework for assessing how our underlying businesses performed excluding the effect of foreign currency rate fluctuations. To present this information, current and comparative prior period results for entities reporting in currencies other than Euro are converted into Euro using the average exchange rates from the prior period rather than the actual exchange rates in effect during the current period.

We believe that revenue growth is a key indicator of how a company is progressing from period to period and presenting constant currency information for revenue provides useful supplemental information to investors regarding our on-going operational performance because it helps us and our investors evaluate the on-going operating performance of the business after removing the impact of currency exchange rates.

Adjusted net income, Adjusted basic earnings per share and Adjusted diluted earnings per share

We define Adjusted net income as net income adjusted for the following items and the related income tax effect, which may occur in any period, and which management believes are not reflective of our operating performance:

• Income or expense related to the evaluation and execution of potential mergers or acquisitions (“M&A”) – under IFRS, gains and losses associated with M&A activity are recognised in the period in which such gains or losses are incurred. We exclude these effects because we believe they are not reflective of our ongoing operating performance.

• Adjustments related to provisions – these adjustments are made for adjustments in provisions that are not reflective of the ongoing operating performance of Interxion. These adjustments may include changes in provisions for onerous lease contracts.

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• Adjustments related to capitalised interest – under IFRS, we are required to calculate and capitalise interest allocated to the investment in data centres and exclude it from net income. We believe that reversing the impact of capitalised interest provides information about the impact of the total interest costs and facilitates comparisons with other data centre operators.

In certain circumstances, we may also adjust for other items that management believes are not representative of our current on-going performance. Examples include: adjustments for the cumulative effect of a change in accounting principle or estimate, impairment losses, litigation gains and losses or windfall gains and losses.

Management believes that the exclusion of certain items listed above provides useful supplemental information to net income to aid investors in evaluating the operating performance of our business and comparing our operating performance with other data centre operators and infrastructure companies. We believe the presentation of Adjusted net income, when combined with net income prepared in accordance with IFRS, is beneficial to a complete understanding of our performance. A reconciliation from reported net income to Adjusted net income is provided in the tables attached to this press release.

Adjusted basic earnings per share and Adjusted diluted earnings per share amounts are determined on Adjusted net income.

Cash generated from operations

Cash generated from operations is defined as net cash flows from operating activities, excluding interest and corporate income tax payments and receipts. Management believes that the exclusion of these items, provides useful supplemental information to net cash flows from operating activities to aid investors in evaluating the cash generating performance of our business.

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IFRS 16 – Leases

We adopted International Financial Reporting Standard 16 – Leases, from 1 January 2019. Under IFRS 16, operating leases are recognized as right of use assets and lease liabilities, and certain components of revenue are recognized as lease revenue.

The impact of IFRS 16 on revenue, gross profit, operating income, Adjusted EBITDA, depreciation and amortization, net finance expense, total assets and total liabilities as reported for the first quarter of 2019 is provided in the tables attached to this press release.

-ENDS-

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 information:

Interxion

Jim Huseby

Investor Relations

Tel: +1-813-644-9399

IR@interxion.com

¹ Recurring revenue is revenue incurred from colocation and associated power charges, office space, amortized set-up fees, cross-connects and certain recurring managed services (but excluding any ad hoc managed services) provided by us directly or through third parties, excluding rents received for the sublease of unused sites.

² Adjusted net income (or ‘Adjusted diluted earnings’), Adjusted EBITDA and Adjusted EBITDA excluding the impact of IFRS 16, are non-IFRS measures intended to adjust for certain items and are not measures of financial performance under IFRS. Complete definitions can be found in the “Non-IFRS

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Financial Measures” section in this press release. Reconciliations of net income to Adjusted EBITDA, Adjusted EBITDA to Adjusted EBITDA excluding the impact of IFRS 16 and net income to Adjusted net income, can be found in the financial tables later in this press release.

³ Capital expenditures, including intangible assets, represent payments to acquire property, plant and equipment and intangible assets, as recorded in the consolidated statement of cash flows as “Purchase of property, plant and equipment” and “Purchase of intangible assets”, respectively.

⁴ We present constant currency information to provide a framework for assessing how our underlying businesses performed excluding the effect of foreign currency rate fluctuations. To present this information, current and comparative prior period results for entities reporting in currencies other than Euro are converted into Euro using the average exchange rates from the prior period rather than the actual exchange rates in effect during the current period.

⁵ We define Cash generated from operations as net cash flows from operating activities, excluding interest and fees paid, interest received and income tax paid.

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INTERXION HOLDING NV

CONDENSED CONSOLIDATED INCOME STATEMENTS

(in €’000 — except per share data and where stated otherwise)

(unaudited)

	Three Months Ended
	Mar-31			Mar-31
	2019			2018
Revenue		151,531			133,836
Cost of sales		(50,394	)		(52,697	)
Gross Profit		101,137			81,139
Other income		—			86
Sales and marketing costs		(9,154	)		(8,708	)
General and administrative costs		(62,144	)		(45,644	)
Operating income		29,839			26,873
Net finance expense		(16,662	)		(11,404	)
Profit before income taxes		13,177			15,469
Income tax expense		(4,778	)		(3,812	)
Net income		8,399			11,657
Basic earnings per share(a): (€)		0.12			0.16
Diluted earnings per share(b): (€)		0.12			0.16
Number of shares outstanding at the end of the period (shares in thousands)		71,867			71,437
Weighted average number of shares for Basic EPS (shares in thousands)		71,810			71,428
Weighted average number of shares for Diluted EPS (shares in thousands)		72,356			71,903
	As at
	Mar-31			Mar-31
Capacity metrics	2019			2018
Equipped space (in square meters)		148,300			128,900
Revenue generating space (in square meters)		119,000			104,100
Utilisation rate		80	%		81	%

(a) Basic earnings per share are calculated as net income divided by the weighted average number of shares for Basic EPS.

(b) Diluted earnings per share are calculated as net income divided by the weighted average number of shares for Diluted EPS.

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INTERXION HOLDING NV

NOTES TO CONDENSED CONSOLIDATED INCOME STATEMENTS: REPORTING SEGMENT INFORMATION

(in €’000 — except where stated otherwise)

(unaudited)

	Three Months Ended
	Mar-31			Mar-31
	2019			2018
Consolidated
Recurring revenue		145,279			126,962
Non-recurring revenue		6,252			6,874
Revenue		151,531			133,836
Net income		8,399			11,657
Net income margin		5.5	%		8.7	%
Operating income		29,839			26,873
Operating income margin		19.7	%		20.1	%
Adjusted EBITDA		77,277			60,876
Gross profit margin		66.7	%		60.6	%
Adjusted EBITDA margin		51.0	%		45.5	%
Total assets		2,699,089			1,788,289
Total liabilities(a)		2,048,858			1,185,128
Capital expenditure, including intangible assets(b)		(144,081	)		(96,195	)
France, Germany, the Netherlands, and the UK
Recurring revenue		96,864			83,455
Non-recurring revenue		4,435			4,456
Revenue		101,299			87,911
Operating income		33,312			27,634
Operating income margin		32.9	%		31.4	%
Adjusted EBITDA		61,121			47,978
Gross profit margin		67.4	%		61.1	%
Adjusted EBITDA margin		60.3	%		54.6	%
Total assets		1,885,683			1,271,899
Total liabilities(a)		616,165			265,553
Capital expenditure, including intangible assets(b)		(99,624	)		(70,574	)
Rest of Europe
Recurring revenue		48,415			43,507
Non-recurring revenue		1,817			2,418
Revenue		50,232			45,925
Operating income		21,008			19,602
Operating income margin		41.8	%		42.7	%
Adjusted EBITDA		32,242			27,571
Gross profit margin		71.8	%		67.6	%
Adjusted EBITDA margin		64.2	%		60.0	%
Total assets		649,091			425,392
Total liabilities(a)		205,603			88,036
Capital expenditure, including intangible assets(b)		(41,586	)		(22,667	)
Corporate and other
Operating income		(24,481	)		(20,363	)
Adjusted EBITDA		(16,086	)		(14,673	)
Total assets		164,315			90,998
Total liabilities(a)		1,227,090			831,539
Capital expenditure, including intangible assets(b)		(2,871	)		(2,954	)

(a) Certain comparative figures as at 31 March 2018 have been restated compared to the amounts disclosed on Form 6-K furnished on 7 March 2018. For further details see note 2 and Note 28 of our 2018 Consolidated Financial Statements included on Form 20-F, filed with the SEC on 30 April 2019.

(b) Capital expenditure, including intangible assets, represents payments to acquire property, plant and equipment and intangible assets, as recorded in the condensed consolidated statements of cash flows as “Purchase of property, plant and equipment” and “Purchase of intangible assets”, respectively.

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INTERXION HOLDING NV

NOTES TO CONDENSED CONSOLIDATED INCOME STATEMENTS: ADJUSTED EBITDA RECONCILIATION

(in €’000 — except where stated otherwise)

(unaudited)

	Three Months Ended
	Mar-31			Mar-31
	2019			2018
Reconciliation to Adjusted EBITDA
Consolidated
Net income		8,399			11,657
Income tax expense		4,778			3,812
Profit before taxation		13,177			15,469
Net finance expense		16,662			11,404
Operating income		29,839			26,873
Depreciation and amortisation		41,678			29,559
Share-based payments		5,680			3,322
Income or expense related to the evaluation and execution of potential mergers or acquisitions:
M&A transaction costs(a)		80			1,208
Items related to sub-leases on unused data centre sites(b)		—			(86	)
Adjusted EBITDA(c)		77,277			60,876
France, Germany, the Netherlands, and the UK
Operating income		33,312			27,634
Depreciation and amortisation		27,407			20,086
Share-based payments		402			344
Items related to sub-leases on unused data centre sites(b)		—			(86	)
Adjusted EBITDA(c)		61,121			47,978
Rest of Europe
Operating income		21,008			19,602
Depreciation and amortisation		10,879			7,745
Share-based payments		355			224
Adjusted EBITDA(c)		32,242			27,571
Corporate and Other
Operating loss		(24,481	)		(20,363	)
Depreciation and amortisation		3,392			1,727
Share-based payments		4,923			2,755
Income or expense related to the evaluation and execution of potential mergers or acquisitions:
M&A transaction costs(a)		80			1,208
Adjusted EBITDA(c)		(16,086	)		(14,673	)

(a) “M&A transaction costs” are costs associated with the evaluation, diligence and conclusion or termination of merger or acquisition activity. These costs are included in “General and administrative costs”.

(b) “Items related to sub-leases on unused data centre sites” represents the income on sub-lease of portions of unused data centre sites to third parties. This income is treated as “Other income”.

(c) “Adjusted EBITDA” is a non-IFRS financial measure. See “Non-IFRS Financial Measures” for more information, including why we believe Adjusted EBITDA is useful, and the limitations on the use of Adjusted EBITDA.

16

Press Release, 9 May 2019

INTERXION HOLDING NV

CONDENSED CONSOLIDATED BALANCE SHEET

(in €’000 — except where stated otherwise)

(unaudited)

	As at
	Mar-31			Dec-31
	2019			2018
Non-current assets
Property, plant and equipment		1,771,682			1,721,064
Right-of-use assets		463,732			—
Intangible assets		65,666			64,331
Goodwill		38,900			38,900
Deferred tax assets		22,887			21,807
Other investments		9,590			7,906
Other non-current assets		16,046			16,843
		2,388,503			1,870,851
Current assets
Trade receivables and other current assets		192,410			205,613
Cash and cash equivalents		118,176			186,090
		310,586			391,703
Total assets		2,699,089			2,262,554
Shareholders’ equity
Share capital		7,186			7,170
Share premium		558,766			553,425
Foreign currency translation reserve		6,600			3,541
Hedging reserve, net of tax		(169	)		(165	)
Accumulated profit		77,848			69,449
		650,231			633,420
Non-current liabilities
Borrowings		1,235,353			1,266,813
Lease liabilities		426,567			—
Deferred tax liabilities		17,513			16,875
Other non-current liabilities		15,238			34,054
		1,694,671			1,317,742
Current liabilities
Trade payables and other current liabilities		294,924			280,877
Lease liabilities		45,935			—
Income tax liabilities		9,070			7,185
Borrowings		4,258			23,330
		354,187			311,392
Total liabilities		2,048,858			1,629,134
Total liabilities and shareholders’ equity		2,699,089			2,262,554

17

Press Release, 9 May 2019

INTERXION HOLDING NV

NOTES TO THE CONDENSED CONSOLIDATED BALANCE SHEET: BORROWINGS AND LEASE LIABILITIES

(in €’000 — except where stated otherwise)

(unaudited)

	As at
	Mar-31		Dec-31
	2019		2018
Borrowings and lease liabilities net of cash and cash equivalents
Cash and cash equivalents		118,176		186,090
4.75% Senior Notes due 2025(a)		1,188,676		1,188,387
Finance lease liabilities (IAS 17)(b)		—		50,374
Mortgages		50,935		51,382
Borrowings		1,239,611		1,290,143
Lease liabilities (IFRS 16)(b)		472,502		—
Total borrowings and lease liabilities		1,712,113		1,290,143
Borrowings and lease liabilities net of cash and cash equivalents(c)		1,593,937		1,104,053

(a) €1,200 million 4.75% Senior Notes due 2025 include a premium on additional issuances and are shown after deducting commissions, offering fees and expenses.

(b) Under IFRS 16, finance lease liabilities are included in the aggregated amount of lease liabilities rather than presented separately.

(c) Total borrowings and lease liabilities exclude deferred financing costs of €2.3 million as of 31 December 2018 which were incurred in connection with the €300 million Revolving Credit Facility, entered into on 18 June 2018, and deferred financing costs of €2.9 million as of 31 March 2019 relate to the Revolving Credit Facility and the increased capacity thereunder in March 2019.

18

Press Release, 9 May 2019

INTERXION HOLDING NV

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(in €’000 — except where stated otherwise)

(unaudited)

	Three Months Ended
	Mar-31 2019			Mar-31 2018
Net income		8,399			11,657
Depreciation and amortisation		41,678			29,559
Share-based payments		5,106			3,215
Net finance expense		16,662			11,404
Income tax expense		4,778			3,812
		76,623			59,647
Movements in trade receivables and other assets		(19,204	)		(6,194	)
Movements in trade payables and other liabilities		22,446			4,628
Cash generated from / (used in) operations		79,865			58,081
Interest and fees paid(a)		(4,865	)		(20,232	)
Income tax paid		(3,659	)		(3,273	)
Net cash flows from / (used in) operating activities		71,341			34,576
Cash flows from / (used in) investing activities
Purchase of property, plant and equipment		(140,695	)		(94,218	)
Financial investments - deposits		12,594			166
Purchase of intangible assets		(3,386	)		(1,977	)
Loans provided		(439	)		(417	)
Net cash flows from / (used in) investing activities		(131,926	)		(96,446	)
Cash flows from / (used in) financing activities
Proceeds from exercised options		252			71
Repayment of mortgages		(472	)		(548	)
Proceeds from revolving credit facilities		—			79,438
Principal elements of lease payments (2018: Financial lease obligation)		(6,529	)		—
Transaction costs 4.75% Senior Notes		(200	)		—
Transaction costs revolving credit facility		(603	)		—
Net cash flows from / (used in) financing activities		(7,552	)		78,961
Effect of exchange rate changes on cash		223			(239	)
Net increase / (decrease) in cash and cash equivalents		(67,914	)		16,852
Cash and cash equivalents, beginning of period		186,090			38,484
Cash and cash equivalents, end of period		118,176			55,336

(a) Interest and fees paid is reported net of cash interest capitalised, which is reported as part of “Purchase of property, plant and equipment”.

19

Press Release, 9 May 2019

INTERXION HOLDING NV

NOTES TO CONDENSED CONSOLIDATED INCOME STATEMENTS AND BALANCE SHEET: IFRS 16 IMPACT RECONCILIATION

(in €’000)

(unaudited)

	Three Months Ended
	Mar-31 2019 As Reported			Effect of change due to IFRS 16			Mar-31 2019 Excl. IFRS 16
Consolidated
Recurring revenue		145,279			—			145,279
Non-recurring revenue		6,252			—			6,252
Revenue		151,531			—			151,531
Gross profit		101,137			6,622			94,515
Gross profit margin		66.7	%		4.3	%		62.4	%
Operating income		29,839			1,533			28,306
Adjusted EBITDA		77,277			7,995			69,282
Adjusted EBITDA margin		51.0	%		5.3	%		45.7	%
Depreciation and amortization		41,678			6,461			35,217
Net finance expense		16,662			3,079			13,583
France, Germany, the Netherlands, and the UK
Recurring revenue		96,864			—			96,864
Non-recurring revenue		4,435			—			4,435
Revenue		101,299			—			101,299
Operating income		33,312			1,141			32,171
Adjusted EBITDA		61,121			5,128			55,993
Adjusted EBITDA margin		60.3	%		5.0	%		55.3	%
Rest of Europe
Recurring revenue		48,415			—			48,415
Non-recurring revenue		1,817			—			1,817
Revenue		50,232			—			50,232
Operating income		21,008			376			20,632
Adjusted EBITDA		32,242			2,397			29,845
Adjusted EBITDA margin		64.2	%		4.8	%		59.4	%
Corporate and Other
Operating income		(24,481	)		16			(24,497	)
Adjusted EBITDA		(16,086	)		470			(16,556	)
	As at
	Mar-31 2019 As Reported			Effect of change due to IFRS 16			Mar-31 2019 Excl. IFRS 16
Consolidated
Non-current assets		2,388,503			414,259			1,974,244
Current assets		310,586			(18,299	)		328,885
Non-current liabilities		1,694,671			371,975			1,322,696
Current liabilities		354,187			25,363			328,824
France, Germany, the Netherlands, and the UK
Total assets		1,885,683			288,169			1,597,514
Total liabilities		616,165			289,314			326,851
Rest of Europe
Total assets		649,091			104,238			544,853
Total liabilities		205,603			104,473			101,130
Corporate and Other
Total assets		164,315			3,553			160,762
Total liabilities		1,227,090			3,551			1,223,539

20

Press Release, 9 May 2019

INTERXION HOLDING NV

NOTES TO CONDENSED CONSOLIDATED INCOME STATEMENTS: ADJUSTED NET INCOME RECONCILIATION

(in €’000 – except per share data and where stated otherwise)

(unaudited)

	Three Months Ended
	Mar-31 2019			Mar-31 2018
Net income - as reported		8,399			11,657
Add back
+ M&A transaction costs		80			1,208
		80			1,208
Reverse
- Interest capitalised		(1,880	)		(884	)
		(1,880	)		(884	)
Tax effect of above add backs & reversals		450			(81	)
Adjusted net income		7,049			11,900
Reported basic EPS: (€)		0.12			0.16
Reported diluted EPS: (€)		0.12			0.16
Adjusted basic EPS: (€)		0.10			0.17
Adjusted diluted EPS: (€)		0.10			0.17

21

Press Release, 9 May 2019

INTERXION HOLDING NV

Status of Announced Expansion Projects as at 9 May 2019

with Target Open Dates after 31 December 2018

Market	Project	CAPEX(a)(b) (€ million)		Equipped Space(a) (sqm)		Schedule
Amsterdam	AMS10: Phases 1 - 3		195		9,500	4Q 2019 - 3Q 2020(c)
Copenhagen	CPH2: Phases 3 - 5		18		1,500	2Q 2018 - 4Q 2019(d)
Dusseldorf	DUS2: Phase 3		5		500	1Q 2019 - 2Q 2019(e)
Frankfurt	FRA13: Phases 1 - 2 New Build		90		4,900	3Q 2018 - 1Q 2019(f)
Frankfurt	FRA14: Phases 1 - 2 New Build		76		4,600	3Q 2019 - 4Q 2019(g)
Frankfurt	FRA15: Phases 1 - 2 New Build		137		4,900	2Q 2020 - 4Q 2020(h)
London	LON3: New Build		35		1,800	1Q 2019 - 3Q 2019(i)
Madrid	MAD3: New Build		44		2,500	2Q 2019 - 4Q 2019(j)
Marseille	MRS2: Phase 2 - 4		72		4,200	2Q 2018 - 4Q 2019(k)
Marseille	MRS3: Phase 1 New Build		79		2,300	1Q 2020
Paris	PAR7.2: Phase B (cont.) - C		47		2,500	2Q 2018 -2Q 2019(l)
Stockholm	STO5: Phases 2 - 3		19		1,200	1Q 2018 - 2Q 2019(m)
Vienna	VIE2: Phase 7 - 9		94		4,300	4Q 2017 - 2Q 2019(n)
Zurich	ZUR1: Phase 6		10		300	2Q 2019
Zurich	ZUR2: Phase 1 - 2 New Build		93		3,600	3Q 2020(o)
Total			1,014		48,600

(a) CAPEX and Equipped space are approximate and may change. SQM figures are rounded to nearest 100 sqm unless otherwise noted, and totals may not add due to rounding.

(b) CAPEX reflects the total spend for the projects listed at full power and capacity and the amounts shown in the table above may be invested over time.

(c) AMS10: Phase 1 (2,700 sqm) is scheduled to open in 4Q 2019; phase 2 (4,100 sqm) is scheduled to open in 1Q 2020, phase 3 (2,700 sqm) is scheduled to open in 3Q 2020.

(d) CPH2: Phases 3 and 4 (900 sqm total) opened in 2Q 2018; phase 5 (600 sqm) is scheduled to open in 4Q 2019.

(e) DUS2: Phase 3 partially opened (300 sqm) in 1Q 2019, the remaining 200 sqm is scheduled to open in 2Q 2019.

(f) FRA13: Phase 1 (2,300 sqm) opened in 3Q 2018; phase 2 (2,600 sqm) opened in 1Q 2019.

(g) FRA14: Phase 1 (2,400 sqm) is scheduled to open in 3Q 2019 and phase 2 (2,200 sqm) is scheduled to open in 4Q 2019.

(h) FRA15: Phase 1 (2,300 sqm) is scheduled to open in 2Q 2020 and phase 2 (2,600 sqm) is scheduled to open in 4Q 2020.

(i) LON3: Phase 1 (300 sqm) opened in 1Q 2019, phase 2 (600 sqm) is scheduled to open in 2Q 2019 and phase 3 (900 sqm) is scheduled to open in 3Q 2019.

(j) MAD3: 1,100 sqm is scheduled to open in 2Q 2019, 700 sqm is scheduled to open in 3Q 2019, and 700 sqm is scheduled to open in 4Q 2019.

(k) MRS2: Phase 2 (700 sqm) opened in 2Q and 3Q 2018; phase 3 (1,100 sqm) is scheduled to open in 2Q 2019 and phase 4 (2,500 sqm) is scheduled to open 4Q 2019.

(l) PAR7.2: Phase B (cont.) (500 sqm) opened in 2Q 2018; phase C part (1,500 sqm) opened in 4Q2018 and the rest (500 sqm) is scheduled to open in 2Q 2019.

(m) STO5: Phases 2-3—100 sqm opened in 1Q 2018; 300 sqm became operational in 2Q 2018; 800 sqm is scheduled to open in 2Q 2019.

(n) VIE2: 2,300 sqm opened in 4Q 2017 through 3Q 2018; remaining 2,000 sqms are scheduled to open in 2Q 2019.

(o) ZUR2: Phase 1 (1,700 sqm) and phase 2 (1,900 sqm) are scheduled to open in 3Q 2020.

22

EX-99.2

1Q 2019 Earnings Conference Call NYSE: INXN 9 May 2019 Exhibit 99.2

This document includes forward-looking statements. All statements other than statements of historical fact included in this document regarding our business, financial condition, results of operations and certain of our plans, objectives, assumptions, projections, expectations or beliefs with respect to these items and statements regarding other future events or prospects, are forward-looking statements. These statements include, without limitation, those concerning: our strategy and our ability to achieve it; expectations regarding sales, profitability and growth; plans for the construction of new data centres; our possible or assumed future results of operations; research and development, capital expenditure and investment plans; adequacy of capital; and financing plans. The words “aim", “may", “will", “expect", “anticipate", “believe", “future", “continue", “help", “estimate", “plan", “schedule", “intend", “should", “shall” or the negative or other variations thereof as well as other statements regarding matters that are not historical fact, are or may constitute forward-looking statements. In addition, this document includes forward-looking statements relating to our potential exposure to various types of market risks, such as foreign exchange rate risk, interest rate risks and other risks related to financial assets and liabilities. We have based these forward-looking statements on our management’s current view with respect to future events and financial performance. These views reflect the best judgment of our management but involve a number of risks and uncertainties which could cause actual results to differ materially from those predicted in our forward-looking statements and from past results, performance or achievements. Although we believe that the estimates reflected in the forward-looking statements are reasonable, such estimates may prove to be incorrect. By their nature, forward-looking statements involve risk and uncertainty because they relate to events and depend on circumstances that will occur in the future. There are a number of factors that could cause actual results and developments to differ materially from those expressed or implied by these forward-looking statements. These factors include, among other things: operating expenses cannot be easily reduced in the short term; inability to utilise the capacity of newly planned data centres and data centre expansions; significant competition; cost and supply of electrical power; data centre industry over-capacity; performance under service level agreements; and delays in remediating the material weakness in internal control over financial reporting and/or making disclosure controls and procedure effective. All forward-looking statements included in this document are based on information available to us on the date of this document. The Company undertakes no obligation to update publicly or revise any forward-looking statement, whether as a result of new information, future events or otherwise, except as may be required by applicable law. All subsequent written and oral forward-looking statements attributable to us or persons acting on our behalf are expressly qualified in their entirety by the cautionary statements contained throughout this document. This document contains references to certain non-IFRS financial measures, such as Adjusted EBITDA, Adjusted EBITDA excluding the impact of IFRS 16, Recurring revenue, Adjusted net income and Adjusted diluted earnings per share. For definitions of these measures and a reconciliation of these measures to the nearest IFRS measure, please refer to the appendix and the tables attached to our 1Q19 press release. Certain financial and other information presented in this document has not been audited or reviewed by our independent auditors. Certain numerical, financial data, other amounts and percentages in this document may not sum due to rounding. In addition, certain figures in this document have been rounded to the nearest whole number. Disclaimer

Strategic & Operational Highlights David Ruberg – Chief Executive Officer

Financial Execution Total revenue up 13% Y/Y Recurring revenue up 14% Y/Y Adjusted EBITDA up 27% Y/Y, or 14% excluding IFRS 16 Adjusted EBITDA margin increased 550 bps Y/Y to 51.0% 20 bps Y/Y to 45.7% excluding IFRS 16 Capital expenditure of €144 million including intangibles Operational Execution Added 3,500 sqm of new equipped space Opened new data centre in London Opened expansions in Frankfurt and Dusseldorf Installed 4,000 sqm of revenue generating space Utilisation rate of 80% New data centre announced in Zurich (ZUR2) and further expansion in Frankfurt (FRA15) 1Q 2019 Performance Continued Strong Demand and Disciplined Execution

1Q Revenue €151.5 million Up 13% Y/Y and 3% Q/Q 1Q Recurring revenue €145.3 million Up 14% Y/Y and 4% Q/Q 96% of total revenue 1Q Adjusted EBITDA €77.3 million Up 27% Y/Y and 14% Q/Q Up 14% Y/Y and 2% Q/Q excluding IFRS 16 1Q Adjusted EBITDA margin 51.0% 550 bps increase Y/Y 20 bps increase Y/Y excluding IFRS 16 1Q 2019 Financial Highlights Adjusted EBITDA & Margin (€ millions) 45.7% 51.0% Margin 45.5% 14% Recurring Revenue Growth and Adjusted EBITDA Margin Expansion Y/Y 46.3% 46.1% Revenue (€ millions) Non- recurring revenue Recurring revenue 133.8 138.8 142.2 146.9 151.5

Equipped space of 148,300 sqm 3,500 sqm added in the quarter Revenue generating space of 119,000 sqm 4,000 sqm installed in the quarter Utilisation rate of 80% 1Q 2019 Operational Highlights Equipped & Revenue Generating Space (000’s sqm) Available Equipped space Revenue generating space 79% 80% 81% Utilisation 80% 128.9 14% Growth Y/Y in Revenue Generating Space With 80% Utilisation Rate 132.6 79% . 140.3 144.8 148.3

Capacity Expansion Across Footprint Note: Totals may not sum due to rounding. As of 9 May 2019, Capex and Equipped Space are approximate and may change. Capex reflects the total spend for the listed project at full power and capacity, and the amounts shown in the table above may be invested over the duration of more than one fiscal year. Announced Capacity Additions with Opening Dates after 31 December 2018(1) Market Data Centre Project Project CapEx (€ millions) Equipped Space (sqm) Schedule Project Opened(1) Amsterdam AMS10 Phases 1-3 195 9,500 0 4Q19 – 3Q20 Copenhagen CPH2 Phases 3-5 18 1,500 900 2Q18 – 4Q19 Dusseldorf DUS2 Phase 3 5 500 300 1Q19 – 2Q19 Frankfurt FRA13 Phases 1-2 New Build 90 4,900 4,900 3Q18 – 1Q19 Frankfurt FRA14 Phases 1-2 New Build 76 4,600 0 3Q19 – 4Q19 Frankfurt FRA15 Phases 1-2 New Build 137 4,900 0 2Q20 – 4Q20 London LON3 New Build 35 1,800 300 1Q19 – 3Q19 Madrid MAD3 New Build 44 2,500 0 2Q19 – 4Q19 Marseille MRS2 Phases 2-4 72 4,200 700 2Q18 – 4Q19 Marseille MRS3 Phase 1 New Build 79 2,300 0 1Q20 Paris PAR7.2 Phase B (cont.) & C 47 2,500 2,500 2Q18 – 2Q19 Stockholm STO5 Phases 2-3 19 1,200 400 1Q18 – 2Q19 Vienna VIE2 Phases 7-9 94 4,300 2,300 4Q17 – 2Q19 Zurich ZUR1 Phase 6 10 300 0 2Q19 Zurich ZUR2 Phase 1-2 New Build 93 3,600 0 3Q20 Capacity additions completed in 1Q19 include: LON3: ~300 sqm new build FRA13: ~2,600 sqm DUS2: ~300 sqm New data centre announced during 1Q19: ZUR2: 3,600 sqm under construction Expansions totaling 36,800 sqm scheduled to open by year end 2020 Aggregate capacity expansion of 25%

39% 30% 30% Communities of Interest Deliver Significant Customer Value Connectivity Platforms Enterprises Note: Totals may not sum due to rounding.

Financial Highlights John Doherty – Chief Financial Officer

1Q 2019 Results (Including and Excluding IFRS 16) Recurring revenue, Non-recurring revenue, Adjusted EBITDA, Adjusted EBITDA margin and Adjusted earnings per share (diluted) are non-IFRS figures intended to adjust for certain items. Full definitions can be found in the “Definitions” section of this presentation. Reconciliations of net income to Adjusted EBITDA can be found in the financial tables later in the appendix of this presentation. Adjusted to exclude impact of IFRS 16 € millions (except per share amounts) 1Q 2018 4Q 2018 1Q 2019 1Q 2019 (excl. IFRS 16) 1Q 2019 (excl. IFRS 16) vs. 1Q 2018 1Q 2019 (excl. IFRS 16) vs. 4Q 2018 Recurring revenue(1) 127.0 139.7 145.3 145.3 14% 4% Non-recurring revenue(1) 6.9 7.2 6.3 6.3 (9%) (14%) Revenue 133.8 146.9 151.5 151.5 13% 3% Gross profit 81.1 89.7 101.1 94.5 16% 5% Gross profit margin 60.6% 61.1% 66.7% 62.4% 180 bps 130 bps Adjusted EBITDA(1) 60.9 67.7 77.3 69.3 14% 2% Adjusted EBITDA margin(1) 45.5% 46.1% 51.0% 45.7% 20 bps (40 bps) Adjusted diluted EPS(1) €0.17 €0.11 €0.10 €0.11 (31%) 5% Revenue growth of 13% Y/Y and 3% Q/Q Recurring revenue up 14% Y/Y and 4% Q/Q Recurring ARPU at €414 Gross profit(2) Up 16% Y/Y and 5% Q/Q Adjusted EBITDA(2) Up 14% Y/Y and 2% Q/Q Adjusted EBITDA margin increased 20 bps Y/Y(2)

1Q 2019 Reporting Segment Analysis Revenue up 9% Y/Y, 1% Q/Q Recurring revenue up 11% Y/Y, 3% Q/Q Adjusted EBITDA(1) up 8% Y/Y, down 1% Q/Q Adjusted EBITDA margin(1) at 59.4% Strength in Austria, Sweden and Denmark Note: This analysis excludes “Corporate & Other” segment. Totals may not sum due to rounding. (1) Adjusted to exclude the impact of IFRS 16. Revenue up 15% Y/Y, 4% Q/Q Recurring revenue up 16% Y/Y, 4% Q/Q Adjusted EBITDA(1) up 17% Y/Y, 6% Q/Q Adjusted EBITDA margin(1) at 55.3% Strength in France, Germany and The Netherlands Revenue Adjusted EBITDA Adjusted EBITDA margin (€ millions) 54.6% 56.2% 55.4% 60.0% 57.4% 59.0% France, Germany, Netherlands & UK 54.0% 60.9% 60.3% 64.2% Rest of Europe 16% Recurring Revenue and 17% Adjusted EBITDA(1) Growth in Big 4

Disciplined Investments(1) 80% 79% 79% SQM Utilisation 81% Customer Demand Drives Focused Capital Expenditure 69% of capex invested in Big 4 95% of capex invested in discretionary expansion projects Maintenance capex at 2% of total revenue Including intangible assets. Totals may not sum due to rounding. 80%

€300 million RCF undrawn Capacity increased by €100 million (to €300 million) in 1Q19 4.9% blended cost of debt(6) 1Q 2019 LTM Cash ROGIC 11% Reported leverage increased due to impact of IFRS 16 LTM Net Leverage (excl. IFRS 16 impact): 4.4x Strong Balance Sheet Total Borrowings = 4.75% Senior Notes due 2025 (“Senior Notes”), shown including the impact of premiums, commissions, offering fees and expenses + Mortgages + Revolving facilities borrowings + Other Borrowings This excludes Finance leases which are under IFRS 16 included in Lease liabilities. Lease Liabilities = liabilities recognized from 1 January 2019 under IFRS 16, including finance leases which previously (under IAS 17) were part of Total borrowings. Gross Leverage Ratio =  (Senior Notes at face value + Mortgages + Revolving facilities borrowings + Other Borrowings + Lease liabilities )  /  LQA (last quarter annualized) Adjusted EBITDA. Net Leverage Ratio = (Senior Notes at face value + Mortgages + Revolving facilities balance + Other Borrowings + Lease liabilities – Cash & Cash Equivalents)  /  LQA (last quarter annualized) Adjusted EBITDA. Net Leverage Ratio (excluding impact of IFRS 16) = (Senior Notes at face value + Mortgages + Finance Leases + Revolving facilities balance + Other Borrowings – Cash & Cash Equivalents)  /  LTM Adjusted EBITDA. Excluding lease liabilities. € millions 31-Mar-19 31-Dec-18 Cash & Cash Equivalents 118.2 186.1 Total Borrowings(1) 1,239.6 1,239.8 Lease Liabilities(2) 472.5 50.4 Total Borrowings and Lease Liabilities 1,712.1 1,290.1 Shareholders Equity 650.2 633.4 Gross Leverage Ratio LQA(3) 5.6x 4.8x Net Leverage Ratio LQA(4) 5.2x 4.1x Net Leverage Ratio LTM (excluding IFRS 16)(5) 4.4x 4.3x Strong Balance Sheet Supports Expansion Program

36 fully built-out(1) data centres(2) Space fully equipped Some power upgrades yet to come As of 1 January 2018 89,100 sqm of equipped space 82% utilisation 4% LTM constant currency recurring revenue growth 22% cash return Disciplined Investments Drive Strong Returns Q1 2019 LTM Returns (€ millions) Note: This slide excludes the impact IFRS 16. Fully Built-Out Data Centre: a data centre for which materially all equippable space is equipped as at 1 January 2018. However, future power upgrades can further increase the capacity of a fully built out data centre. 36 Fully Built-Out Data Centres as at 1 January 2018: AMS1, AMS3, AMS4, AMS5, AMS6, AMS7, BRU1, CPH1, DUB1, DUB2, FRA1, FRA2, FRA3, FRA4, FRA5, FRA7, FRA8, FRA9, FRA10, FRA12, DUS1, LON1, LON2, MAD1, MAD2, PAR1, PAR2, PAR3, PAR4, PAR5, PAR6, STO1, STO2, STO3, STO4 and VIE1. Represents total cumulative investments in Data Centre Assets, including freehold land and buildings, infrastructure and equipment and Intangible assets including goodwill, as at 31 March 2019. Attractive Cash Returns from Fully Built-Out(1) Data Centres

Business Commentary Outlook & Concluding Remarks David Ruberg – Chief Executive Officer

Maturity of Cloud Adoption in Europe Sources: Interxion, Gartner and Structure Research. Italy France US Germany UK Netherlands Nordics Ireland Austria Switzerland Belgium Poland Balkans Spain Russia Interxion presence No direct presence Size of Bubbles = Level of IT Spend Substantial Opportunity Ahead in Europe 2018 Outsourced Data Centre Capacity (MW) 42% 66% 2018 IT Spend ($ B)

Guidance for 2019 Adjusted EBITDA is a non-IFRS figure intended to adjust for certain items. The definition of Adjusted EBITDA can be found in the “Definitions” section in this slide deck. Interxion does not provide an outlook for an IFRS profitability metric. Consequently, the company is unable to reconcile the outlook for Adjusted EBITDA. Revenue Adjusted EBITDA Capital Expenditure €632m – €647m €324m – €334m €570m – €600m

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Appendix

A leading carrier & cloud neutral data centre operator across Europe Interxion Overview 52 Data Centres in Operation 13 Cities 11 Countries 700+ Connectivity Providers 20+ Internet Exchanges 500+ Platform Providers 2,000+ Customers 800+ Employees Note: Figures as of 31 March 2019.

Track Record Of Execution Note: This slide excludes the impact of IFRS 16 and include Interxion Science Park as of 24 February 2017. CAGR calculated as 2018 vs 2010. Adjusted EBITDA margin calculated as Adjusted EBITDA divided by Revenue. Adjusted to exclude the impact of IFRS 16. CAGR(1) = 13% CAGR(1) = 16% 38% 40% 42% 43% 43% 44% 45% 45% 46% 46% 21% 17% 13% 11% 11% 13% 9% 16% 15% 13% 50 Consecutive Quarters of Revenue and Adjusted EBITDA Growth YOY Growth 26% 23% 18% 15% 11% 17% 11% 16% 17% 14% Adj. EBITDA Margin(2) YOY Growth (3)

Illustrative ARPU Development ARPU increases over time as IT workloads increase: Customers initially contract for space, connectivity and modest power reservation(1) As workloads increase, larger power reservation fees and cross-connects are required and energy consumption increases Revenue grows from space, cross-connects, power reservation and energy consumption over time As data centres fill with customers: Revenue mix initially tilted toward space As space becomes more fully utilised, revenue growth from power reservation and energy consumption can continue Power reservation is the fee for infrastructure power (cooling, power distribution, etc.). Customer ARPU Development Data Centre Recurring Revenue Development Power Reservation & Energy Consumption Cross-Connects Revenue Develops Over Time Driven by Power Reservation and Energy Consumption Space Installed

IFRS 16 – Lease Accounting Metric Significant Considerations Impact Revenue Certain components of revenue are recognised as lease revenue. Negligible impact on revenue metrics Adjusted EBITDA Properties and other assets leased under operating lease agreements are recognised as right of use assets and lease liabilities, reducing rent expense and increasing interest expense and depreciation charges. 530 bps increase to Adjusted EBITDA margin in 1Q 2019 Leverage Recognising right of use assets and lease liabilities for data centres leased under operating leases increases the level of reported third party debt resulting in an increase in reported gross and net leverage. Impact as at 31 March 2019: Gross leverage (LQA): +0.8x Net leverage (LQA): +1.1x IFRS 16 adopted 1 January 2019 Operating leases and financial leases are now treated the same IFRS 16 does not impact Interxion’s financial covenant reporting on debt or revolving credit facilities More comparable with our U.S. peer group

Historical Financial Results Note: Figures rounded to nearest net €0.1 million. Totals may not sum due to rounding. Includes €0.8 million, €0.6 million, €1.6 million, €1.6 million, €1.2 million, €1.0 million, €0.7 million, €0.3 million and €0.1 million of M&A transaction costs in 1Q17, 2Q17, 3Q17, 4Q17, 1Q18, 2Q18, 3Q18, 18 and 1Q19 respectively. Includes €11.2 million of one-time charge related to termination of financing arrangements. € millions (except as noted) 2017 2018 2019 2017 2018 1Q 2Q 3Q 4Q 1Q 2Q 3Q 4Q 1Q FY FY Recurring revenue 108.3 113.4 117.4 123.4 127.0 131.7 134.8 139.7 145.3 462.5 533.1 Non-recurring revenue 5.7 7.4 7.3 6.5 6.9 7.1 7.4 7.2 6.3 26.8 28.7 Total revenue 113.9 120.8 124.6 129.9 133.8 138.8 142.2 146.9 151.5 489.3 561.8 Gross profit 69.9 72.9 75.0 81.0 81.1 85.1 86.3 89.7 101.1 298.8 342.3 Gross profit margin 61.3% 60.3% 60.2% 62.4% 60.6% 61.3% 60.7% 61.1% 66.7% 61.1% 60.9% Adj EBITDA 51.3 54.3 56.2 59.1 60.9 63.4 65.8 67.7 77.3 221.0 257.8 Adj EBITDA margin 45.1% 45.0% 45.1% 45.5% 45.5% 45.7% 46.3% 46.1% 51.0% 45.2% 45.9% Net income / (loss) 10.3(1) 9.7(1) 9.4(1) 9.7(1) 11.7(1) 0.6(1)(2) 10.9(1) 8.0(1) 8.4(1) 39.1(1) 31.1(1) CapEx paid 54.8 56.4 75.2 69.7 96.2 120.5 103.2 131.3 144.1 256.0 451.2 Expansion / upgrade 49.0 46.0 69.7 60.2 90.1 109.6 99.7 120.7 137.5 224.8 420.0 Maintenance & other 4.0 7.4 4.0 7.0 4.2 7.9 2.5 5.2 3.2 22.4 19.7 Intangibles 1.8 3.0 1.4 2.5 2.0 3.0 1.0 5.4 3.4 8.8 11.4 Cash generated from operations 63.0(1) 40.6(1) 55.2(1) 50.3(1) 58.1(1) 55.1(1) 60.9(1) 76.9(1) 79.9(1) 209.0(1) 251.0(1) Gross PP&E 1.728.5 1,778.3 1,844.6 1,935.1 2,020.8 2,139.5 2,257.4 2,427.3 2,510.9 1,935.1 2,427.3 Gross intangible assets 113.3 114.8 114.9 117.0 119.7 122.5 123.4 128.8 130.4 117.0 128.8 Gross Goodwill 40.2 39.4 38.9 38.9 38.9 38.9 38.9 38.9 38.9 38.9 38.9 LTM Cash ROGIC 12% 12% 12% 11% 11% 11% 11% 12% 11% 11% 12%

Historical Reporting Segment Financial Results Note: Figures rounded to nearest net €0.1 Million. Totals may not sum due to rounding. € millions (except as noted) 2017 2018 2019 2017 2018 1Q 2Q 3Q 4Q 1Q 2Q 3Q 4Q 1Q FY FY Big 4 Recurring revenue 70.0 74.2 76.6 81.6 83.5 87.3 89.2 92.7 96.9 302.3 352.7 Non-recurring revenue 3.4 4.7 4.3 3.9 4.5 4.2 4.4 4.6 4.4 16.3 17.6 Total revenue 73.4 78.9 80.8 85.6 87.9 91.5 93.6 97.3 101.3 318.6 370.3 Gross profit margin 61.9% 62.0% 61.0% 64.4% 61.1% 63.2% 61.9% 61.2% 67.4% 62.4% 61.8% Adj EBITDA 40.2 43.1 43.4 48.1 48.0 51.4 51.8 52.6 61.1 174.8 203.8 Adj EBITDA margin 54.7% 54.7% 53.7% 56.2% 54.6% 56.2% 55.4% 54.0% 60.3% 54.9% 55.0% CapEx Paid 35.1 40.7 51.6 47.4 70.6 82.6 80.1 85.4 99.6 174.8 318.6 Rest of Europe Recurring revenue 38.3 39.2 40.8 41.8 43.5 44.4 45.6 46.9 48.4 160.2 180.4 Non-recurring revenue 2.3 2.7 3.0 2.5 2.4 2.9 3.0 2.7 1.8 10.5 11.1 Total revenue 40.6 42.0 43.8 44.3 45.9 47.3 48.6 49.6 50.2 170.7 191.4 Gross profit margin 66.8% 65.2% 65.8% 66.7% 67.6% 65.0% 66.4% 68.4% 71.8% 66.1% 66.8% Adj EBITDA 23.7 24.0 25.9 26.1 27.6 27.2 28.7 30.2 32.2 99.7 113.7 Adj EBITDA margin 58.3% 57.3% 59.1% 58.8% 60.0% 57.4% 59.0% 60.9% 64.2% 58.4% 59.4% CapEx Paid 16.2 13.7 21.1 18.7 22.7 29.8 20.7 40.6 41.6 69.8 113.8 Corporate & Other Adj EBITDA (12.5) (12.8) (13.1) (15.1) (14.7) (15.1) (14.8) (15.1) (16.1) (53.5) (59.7) CapEx Paid 3.4 2.1 2.3 3.5 3.0 8.2 2.4 5.3 2.9 11.4 18.8

Historical Operating Metrics(1) Interxion Science Park was acquired in February 2017. One data centre added to “Data centres in operation” at 1Q 2017. Starting from 1Q 2018, totals include 2,300 sqm of equipped space and 1,300 sqm of revenue generating space from Interxion Science Park. All figures at the end of the period, except as noted. Maximum equippable customer power includes the announced maximum equippable customer power from current and announced data centres as of the date of each quarter’s respective report. Utilisation as of the end of the reporting period. Space figures in square metres(2) Recurring ARPU in € Customer Power in MW(2) 2017 2018 2019 1Q 2Q 3Q 4Q 1Q 2Q 3Q 4Q 1Q Equipped space 114,100 117,000 118,900 122,500 128,900 132,600 140,300 144,800 148,300 Equipped space added 3,300 2,900 1,900 3,600 4,000 3,700 7,700 4,500 3,500 Revenue generating space 89,800 95,000 97,100 99,800 104,100 106,200 111,200 115,000 119,000 RGS added 2,600 5,200 2,100 2,700 2,900 2,100 5,000 3,800 4,000 Recurring ARPU 405 403 401 411 412 418 413 412 414 Utilisation (%)(3) 79% 81% 82% 81% 81% 80% 79% 79% 80% Equipped customer power 136 142 146 160 166 169 185 199 199 Maximum equippable customer power 195 203 223 225 241 276 278 314 326 Data centres in operation 45 45 48 49 50 50 51 51 52

Scheduled Equipped Space Additions Figures rounded to nearest net 100 sqm for each country unless otherwise noted. Totals may not sum due to rounding. Excludes acquisition of Interxion Science Park, which added approximately 2,300 sqm from 1Q17. Future expansion additions based on announced schedule, which is subject to change; additions scheduled for the first half of the year are noted in the second quarter and additions scheduled for the second half of the year are noted in the fourth quarter. Space figures in square metres(1) 2017(2) 2018 2019E(3) 2020E(3) 1Q 2Q 3Q 4Q 1Q 2Q 3Q 4Q 1Q 2QE 3QE 4QE 1QE 2QE 3QE 4QE Big 4 France 1,600 1,500 100 ‒ ‒ 900 600 1,500 300 1,500 ‒ 2,500 2,300 ‒ ‒ ‒ Germany ‒ ‒ 1,100 2,400 2,400 ‒ 2,400 300 2,900 200 2,400 2,200 ‒ 2,300 ‒ 2,600 Netherlands 1,300 ‒ ‒ ‒ ‒ ‒ 3,200 2,700 ‒ ‒ ‒ 2,700 4,100 ‒ 2,700 ‒ UK ‒ ‒ ‒ ‒ ‒ ‒ ‒ ‒ 300 600 900 ‒ ‒ ‒ ‒ ‒ Subtotal 3,000 1,500 1,200 2,400 2,400 800 6,200 4,500 3,500 2,300 3,300 7,400 6,400 2,300 2,700 2,600 Rest of Europe Austria ‒ 1,100 ‒ 300 400 400 1,200 ‒ ‒ 2,000 ‒ ‒ ‒ ‒ ‒ ‒ Belgium ‒ ‒ ‒ ‒ 1,100 ‒ ‒ ‒ ‒ ‒ ‒ ‒ ‒ ‒ ‒ ‒ Denmark 300 300 ‒ ‒ ‒ 900 ‒ ‒ ‒ ‒ ‒ 600 ‒ ‒ ‒ ‒ Ireland ‒ ‒ ‒ ‒ ‒ 1,200 ‒ ‒ ‒ ‒ ‒ ‒ ‒ ‒ ‒ ‒ Spain ‒ ‒ ‒ ‒ ‒ ‒ ‒ ‒ ‒ 1,100 700 700 ‒ ‒ ‒ ‒ Sweden 100 ‒ 300 200 100 300 ‒ ‒ ‒ 800 ‒ ‒ ‒ ‒ ‒ ‒ Switzerland ‒ ‒ 400 700 100 ‒ 200 ‒ ‒ 300 ‒ ‒ ‒ ‒ 3,600 ‒ Subtotal 400 1,400 700 1,200 1,700 2,800 1,400 ‒ ‒ 4,200 700 1,300 ‒ ‒ 3,600 ‒ Total additional equipped space 3,300 2,900 1,900 3,600 4,000 3,700 7,700 4,500 3,500 6,500 4,000 8,700 6,400 2,300 6,300 2,600 22,700 sqm in 2019E 19,900 sqm in 2018 11,700 sqm in 2017 17,600 sqm in 2020E

Space Analysis by Country Note: Figures rounded to nearest net 100 sqm for each country unless otherwise noted. Totals may not sum due to rounding. As of 31 March 2019. Expansions announced after the end of the quarter are excluded. Maximum Equippable Space (incl DC’s under construction) = Equipped Space + Under Construction Space + Unequipped Space. Future expansion additions based on announced schedules only, which is subject to change; excludes expansions announced after the end of the period. Excludes land bank and undeveloped properties. Space figures in square metres Data Centres in Operation / under Construction Maximum Equippable Space in Country(1) (incl DC’s under construction) Equipped Space in Country Equipped Space Under Construction in Country(2) Unequipped Space Available for Development(3) Big 4 France 10 40,000 26,600 11,100 2,300 Germany 17 50,200 35,700 14,500 0 Netherlands 9 45,400 31,000 9,500 4,900 UK 3 8,700 7,200 1,500 0 Subtotal 39 144,300 100,500 36,700 7,100 Rest of Europe Austria 2 13,300 11,200 2,000 0 Belgium 2 6,200 6,200 0 0 Denmark 2 6,400 5,800 600 0 Ireland 3 5,800 5,800 0 0 Spain 3 8,200 5,700 2,500 0 Sweden 5 6,800 5,800 800 200 Switzerland 2 14,200 7,300 6,700 200 Subtotal 18 60,900 47,800 12,700 500 Total 58 205,200 148,300 49,400 7,500

Pan-European Data Centre Portfolio 18 Location Owned / Leased Build Out Status(1) Maximum Equippable Space (sqm)(2) Location Owned / Leased Build Out Status(1) Maximum Equippable Space (sqm)(2) Big 4 France Netherlands MRS1 Owned Expanding 6,400 AMS1 Leased Fully 600 MRS2 Leased Expanding 4,500 AMS3 Owned Fully 3,000 MRS3 Leased Under Construction 7,100 AMS4 Leased Fully NM (4) PAR1 Leased Fully 1,400 AMS5 Leased Fully 4,300 PAR2 Leased Fully 2,900 AMS6 Owned Fully 4,400 PAR3 Owned Fully 1,900 AMS7 Leased(3) Fully 7,600 PAR4 Leased Fully 1,300 AMS8 Leased Expanding 8,200 PAR5 Owned Fully 4,000 AMS9 Owned Expanding 2,800 PAR6 Leased Fully 1,300 AMS10 Owned Under Construction 14,400 PAR7 Leased(3) Expanding 9,300 UK LON1 Leased Fully 5,400 LON2 Leased Fully 1,500 LON3 Leased Expanding 1,800 Germany DUS1 Leased Fully 3,300 FRA7 Leased Fully 1,500 DUS2 Leased Expanding 1,800 FRA8 Owned Fully 3,700 FRA1 Leased Fully 500 FRA9 Leased Fully 800 FRA2 Leased Fully 1,100 FRA10 Owned Fully 4,800 FRA3 Leased Fully 2,200 FRA11 Owned Expanding 4,800 FRA4 Leased Fully 1,400 FRA12 Leased Fully 1,100 FRA5 Leased Fully 1,700 FRA13 Owned Expanding 4,900 FRA6 Leased Expanding 2,600 FRA14 Owned Under Construction 4,600 FRA15 Owned Under Construction 9,600 ROE Austria   Spain       VIE1 Owned Fully 4,700 MAD1 Leased Fully 4,000 VIE2 Owned Expanding 8,500 MAD2 Leased Fully 1,700 MAD3 Owned Under Construction 2,500 Belgium     Sweden     BRU1 Owned Fully 5,100 STO1 Leased Fully 1,900 BRU2 Leased Expanding 1,100 STO2 Leased Fully 1,200 Denmark     STO3 Leased Fully 900 CPH1 Leased Fully 3,700 STO4 Leased Fully 1,100 CPH2 Owned Expanding 2,600 STO5 Leased Expanding 1,700 Ireland     Switzerland     DUB1 Leased Fully 1,100 ZUR1 Leased Expanding 7,600 DUB2 Leased Fully 2,300 ZUR2 Leased Under Construction 6,600 DUB3 Owned Expanding 2,300 Total 205,200 Note: Totals may not sum due to rounding. Built Out Status as of 1 January 2018, consistent with slide 14. As of 31 March 2019. Purchase options have been exercised, though not yet closed. Maximum equippable space for AMS4 is included in the maximum equippable space of AMS1. Includes purchase options have been exercised, though not yet closed. Totals: # Sqm %         Owned(5) 21 112,100 55% Leased 37 93,200 45% Total 58 205,200 100%

Non-IFRS Reconciliation Note: Figures rounded to nearest net €0.1 million. Totals may not sum due to rounding. Includes €31.0 million of one-off charges related to debt refinancing. Includes €11.2 million of one-off charges related to termination of financing arrangements. This re-assessment relates to years prior to 2018 and is therefore not representative of our current ongoing business. € millions (except as noted) 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 1Q 2Q 3Q 4Q 1Q Net income 14.7 25.5 31.6 6.9(1) 34.4 46.7 38.3 39.1 11.7 0.6(2) 10.9 8.0 8.4 Income tax expense / (benefit) 2.5 9.7 15.8 6.1 15.5 17.9 16.4 14.8 3.8 2.8 4.4 7.3 4.8 Profit / (loss) before taxation 17.2 35.2 47.4 13.0 49.9 64.6 54.7 53.9 15.5 3.4 15.3 15.3 13.2 Net finance expense 29.5 22.9 17.8 57.5(1) 27.9 29.0 36.3 44.3 11.4 22.9(2) 11.7 15.8 16.7 Operating profit 46.7 58.1 65.2 70.5 77.8 93.6 91.0 98.3 26.9 26.3 27.1 31.0 29.8 Depreciation, amortisation and impairments 31.1 35.6 44.0 57.6 62.2 78.3 89.8 108.3 29.6 32.2 32.9 34.3 41.7 Share-based payments 1.7 2.6 5.4 4.2 7.2 9.0 7.9 9.9 3.3 3.9 3.9 1.5 5.7 Increase/(decrease) in provision for onerous lease contracts 0.2 0.0 0.8 ‒ (0.8) (0.2) ‒ ‒ ‒ ‒ ‒ ‒ ‒ IPO transaction costs ‒ 1.7 ‒ ‒ ‒ ‒ ‒ ‒ ‒ ‒ ‒ ‒ ‒ M&A transaction break fee income ‒ ‒ ‒ ‒ ‒ (20.9) ‒ ‒ ‒ ‒ ‒ ‒ ‒ M&A transaction costs ‒ ‒ ‒ ‒ 0.3 11.9 2.4 4.6 1.2 1.0 0.7 0.3 0.1 Re-assessment of indirect taxes(3) ‒ ‒ ‒ ‒ ‒ ‒ ‒ ‒ ‒ ‒ 1.2 0.6 ‒ Income from sub-leases on unused data centre sites (0.4) (0.4) (0.4) (0.3) (0.4) (0.4) (0.1) (0.1) (0.1) ‒ ‒ ‒ ‒ Increase/(decrease) in provision for site restoration ‒ ‒ ‒ ‒ ‒ ‒ (0.2) ‒ ‒ ‒ ‒ ‒ ‒ Adjusted EBITDA 79.2 97.6 115.0 131.9 146.4 171.2 190.8 220.9 60.9 63.4 65.8 67.7 77.3

Reconciliation to Segment Adjusted EBITDA Note: Figures rounded to nearest net €0.1 million. Totals may not sum due to rounding. This re-assessment relates to years prior to 2018 and is therefore not representative of our current ongoing business. € millions 2017 2018 2019 1Q 2Q 3Q 4Q 1Q 2Q 3Q 4Q 1Q BIG 4 Operating profit 24.0 24.8 24.2 28.2 27.6 30.3 30.4 29.5 33.3 Depreciation, amortisation and impairments 15.9 18.1 18.8 19.9 20.1 20.8 21.2 22.9 27.4 Share-based payments 0.3 0.2 0.4 0.1 0.3 0.3 0.3 0.2 0.4 Income from sub-leases on unused data centre sites ‒ ‒ ‒ (0.1) (0.1) ‒ ‒ ‒ ‒ Adjusted EBITDA 40.2 43.1 43.4 48.1 48.0 51.4 51.8 52.6 61.1   ROE Operating profit 16.7 16.4 18.3 18.5 19.6 18.6 18.0 20.8 21.0 Depreciation, amortisation and impairments 7.0 7.4 7.5 7.5 7.7 8.2 9.3 8.7 10.9 Share-based payments (0.0) 0.2 0.1 0.1 0.2 0.3 0.3 0.1 0.4 Re-assessment of indirect taxes(1) ‒ ‒ ‒ ‒ ‒ ‒ 1.2 0.6 ‒ Adjusted EBITDA 23.7 24.0 25.9 26.1 27.6 27.2 28.7 30.2 32.2   CORPORATE & OTHER Operating profit/(loss) (16.9) (16.9) (18.1) (20.9) (20.4) (22.7) (21.3) (19.4) (24.5) Depreciation, amortisation and impairments 1.3 1.7 1.5 1.6 1.7 3.2 2.5 2.7 3.4 Share-based payments 2.3 1.8 1.9 2.5 2.8 3.4 3.4 1.3 4.9 M&A transaction costs 0.8 0.6 1.6 1.6 1.2 1.0 0.7 0.3 0.1 Adjusted EBITDA (12.5) (12.8) (13.1) (15.1) (14.7) (15.1) (14.8) (15.1) (16.1)

Summary of IFRS 16 Impacts € millions Balance Sheet Impacts Mar-31 2019 As reported Effect of change due to IFRS 16 Mar-31 2019 Excl. IFRS 16 Consolidated Non-current assets 2,388.5 414.3 1,974.2 Current assets 310.6 (18.3) 328.9 Non-current liabilities 1,694.7 372.0 1,322.7 Current liabilities 354.2 25.4 328.8 BIG 4 Total assets 1,885.7 288.2 1,597.5 Total liabilities 616.2 289.3 326.9 ROE Total assets 649.1 104.2 544.9 Total liabilities 205.6 104.5 101.1 CORP Total assets 164.3 3.6 160.8 Total liabilities 1,227.1 3.6 1,223.5

Adjusted EBITDA: We define Adjusted EBITDA as Operating Income adjusted for depreciation and amortisation, share-based payments, income or expense related to the evaluation and execution of potential mergers or acquisitions and adjustments related to terminated and unused data centre sites. In certain circumstances, we may also adjust for other items that management believes are not representative of our current on-going performance. Examples include: adjustments for the cumulative effect of a change in accounting principle or estimate, impairment losses, litigation gains and losses or windfall gains and losses Adjusted EBITDA excluding the impact of IFRS 16: For comparative purposes with regard to Adjusted EBITDA presented in periods prior to 1 January 2019, the effective date of IFRS 16, we present Adjusted EBITDA excluding the impact of IFRS 16 - Leases. Adjusted diluted earnings per share: Adjusted diluted earnings per share amounts are determined on Adjusted net income Adjusted net income: We define Adjusted net income as net income adjusted to exclude income or expense related to the evaluation and execution of potential mergers or acquisitions, adjustments to provisions which are not reflective of our ongoing performance, and adjustments related to capitalised interest. In certain circumstances, we may also adjust for other items that management believes are not representative of our current on-going performance. Examples include: adjustments for the cumulative effect of a change in accounting principle or estimate, impairment losses, litigation gains and losses or windfall gains and losses ARPU: Monthly recurring revenue per square meter calculated as {reported recurring revenue in the quarter divided by 3} divided by {sum of prior and current quarter end reported revenue generating space divided by 2} Big 4: France, Germany, the Netherlands and the UK CAGR: Compound Annual Growth Rate Capital expenditures including intangible assets: Represent payments to acquire property, plant and equipment and intangible assets as recorded on our consolidated statement of cash flows as "Purchase of property, plant and equipment" and “Purchase of intangible assets”, respectively. Investments in intangible assets include power grid rights and software development Cash generated from operations: Net cash flows from operating activities, excluding interest and fees paid, interest received and income tax paid Cash ROGIC: Cash Return on Gross Invested Capital defined as {LTM (last twelve months) Adjusted EBITDA (excluding IFRS16 adjustments) less cash taxes, less maintenance and other capex} divided by {Average of opening and closing Gross Invested Capital}. Where Gross Invested Capital represents gross PP&E plus gross Intangible assets plus gross Goodwill, less assets under construction, less carrying value of undeveloped land Definitions Constant Currency: Measurements of the given metric that eliminate the effects of foreign currency rate fluctuations. To calculate this information, current and comparative prior period results for entities reporting in currencies other than Euro are converted into Euro using the average exchange rates from the comparative period rather than the actual exchange rates in effect during the respective periods Corporate and Other: Unallocated items mainly comprising general and administrative expenses, assets and liabilities associated with our headquarters operations, provisions for onerous contracts (relating to the discounted amount of future losses expected to be incurred in respect of unused data centre sites over the term of the relevant leases) and revenue and expenses related to those onerous contracts, loans and borrowings and related expenses and income tax assets and liabilities Churn: Contracted Monthly Recurring Revenue which came to an end during the month as a percentage of the total contracted Monthly Recurring Revenue at the beginning of the month. Churn is calculated as a monthly average over the last 12 months Customer Available Power: The current installed electrical customer capacity Equipped Space: The amount of data centre space that, on the relevant date, is equipped and either sold or could be sold, without making any significant additional investments to common infrastructure LTM or Last Twelve Months: Twelve-month period ended 31 March 2019, unless otherwise noted MW: Megawatts Recurring Revenue: Revenue incurred from colocation and associated power charges, office space, amortised set-up fees, cross-connects and certain recurring managed services (but excluding any ad hoc managed services) provided by us directly or through third parties, excluding rents received for the sublease of unused sites Rest of Europe / ROE: Austria, Belgium, Denmark, Ireland, Spain, Sweden, and Switzerland Revenue Generating Space: the amount of Equipped Space that is under contract and billed on the relevant date SQM: Square metres Utilisation Rate: On the relevant date, Revenue Generating Space as a percentage of Equipped Space. Some Equipped Space is not fully utilised due to customers' specific requirements regarding the layout of their equipment. In practice, therefore, Utilisation Rate does not reach 100%

Interxion Leadership David Ruberg, Chief Executive Officer John Doherty, Chief Financial Officer Giuliano Di Vitantonio, Chief Marketing & Strategy Officer Jan-Pieter Anten, SVP, Human Resources Jaap Camman, SVP, Legal Adriaan Oosthoek, SVP, IT & Operations Support Sell-Side Analyst Coverage Bank of America Merrill Lynch, Michael Funk Berenberg, Nate Crossett Citi, Mike Rollins Cowen, Colby Synesael Credit Suisse, Sami Badri Guggenheim, Rob Gutman Oppenheimer, Tim Horan Raymond James, Frank Louthan RBC Capital Markets, Jon Atkin Stifel, Erik Rasmussen Sun Trust Robinson Humphrey, Greg Miller Wells Fargo, Jennifer Fritzsche William Blair, Jim Breen Investor Relations Jim Huseby, VP, Investor Relations T: +1 813 644 9399 E: ir@interxion.com